clang/unittests/Format/FormatTest.cpp

//===- unittest/Format/FormatTest.cpp - Formatting unit tests -------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "clang/Format/Format.h"

#include "../Tooling/ReplacementTest.h"
#include "FormatTestUtils.h"

#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MemoryBuffer.h"
#include "gtest/gtest.h"

#define DEBUG_TYPE "format-test"

using clang::tooling::ReplacementTest;
using clang::tooling::toReplacements;

namespace clang {
namespace format {
namespace {

FormatStyle getGoogleStyle() { return getGoogleStyle(FormatStyle::LK_Cpp); }

class FormatTest : public ::testing::Test {
protected:
  enum IncompleteCheck {
    IC_ExpectComplete,
    IC_ExpectIncomplete,
    IC_DoNotCheck
  };

  std::string format(llvm::StringRef Code,
                     const FormatStyle &Style = getLLVMStyle(),
                     IncompleteCheck CheckIncomplete = IC_ExpectComplete) {
    DEBUG(llvm::errs() << "---\n");
    DEBUG(llvm::errs() << Code << "\n\n");
    std::vector<tooling::Range> Ranges(1, tooling::Range(0, Code.size()));
    bool IncompleteFormat = false;
    tooling::Replacements Replaces =
        reformat(Style, Code, Ranges, "<stdin>", &IncompleteFormat);
    if (CheckIncomplete != IC_DoNotCheck) {
      bool ExpectedIncompleteFormat = CheckIncomplete == IC_ExpectIncomplete;
      EXPECT_EQ(ExpectedIncompleteFormat, IncompleteFormat) << Code << "\n\n";
    }
    ReplacementCount = Replaces.size();
    auto Result = applyAllReplacements(Code, Replaces);
    EXPECT_TRUE(static_cast<bool>(Result));
    DEBUG(llvm::errs() << "\n" << *Result << "\n\n");
    return *Result;
  }

  FormatStyle getLLVMStyleWithColumns(unsigned ColumnLimit) {
    FormatStyle Style = getLLVMStyle();
    Style.ColumnLimit = ColumnLimit;
    return Style;
  }

  FormatStyle getGoogleStyleWithColumns(unsigned ColumnLimit) {
    FormatStyle Style = getGoogleStyle();
    Style.ColumnLimit = ColumnLimit;
    return Style;
  }

  void verifyFormat(llvm::StringRef Code,
                    const FormatStyle &Style = getLLVMStyle()) {
    EXPECT_EQ(Code.str(), format(test::messUp(Code), Style));
  }

  void verifyIncompleteFormat(llvm::StringRef Code,
                              const FormatStyle &Style = getLLVMStyle()) {
    EXPECT_EQ(Code.str(),
              format(test::messUp(Code), Style, IC_ExpectIncomplete));
  }

  void verifyGoogleFormat(llvm::StringRef Code) {
    verifyFormat(Code, getGoogleStyle());
  }

  void verifyIndependentOfContext(llvm::StringRef text) {
    verifyFormat(text);
    verifyFormat(llvm::Twine("void f() { " + text + " }").str());
  }

  /// \brief Verify that clang-format does not crash on the given input.
  void verifyNoCrash(llvm::StringRef Code,
                     const FormatStyle &Style = getLLVMStyle()) {
    format(Code, Style, IC_DoNotCheck);
  }

  int ReplacementCount;
};

TEST_F(FormatTest, MessUp) {
  EXPECT_EQ("1 2 3", test::messUp("1 2 3"));
  EXPECT_EQ("1 2 3\n", test::messUp("1\n2\n3\n"));
  EXPECT_EQ("a\n//b\nc", test::messUp("a\n//b\nc"));
  EXPECT_EQ("a\n#b\nc", test::messUp("a\n#b\nc"));
  EXPECT_EQ("a\n#b c d\ne", test::messUp("a\n#b\\\nc\\\nd\ne"));
}

//===----------------------------------------------------------------------===//
// Basic function tests.
//===----------------------------------------------------------------------===//

TEST_F(FormatTest, DoesNotChangeCorrectlyFormattedCode) {
  EXPECT_EQ(";", format(";"));
}

TEST_F(FormatTest, FormatsGlobalStatementsAt0) {
  EXPECT_EQ("int i;", format("  int i;"));
  EXPECT_EQ("\nint i;", format(" \n\t \v \f  int i;"));
  EXPECT_EQ("int i;\nint j;", format("    int i; int j;"));
  EXPECT_EQ("int i;\nint j;", format("    int i;\n  int j;"));
}

TEST_F(FormatTest, FormatsUnwrappedLinesAtFirstFormat) {
  EXPECT_EQ("int i;", format("int\ni;"));
}

TEST_F(FormatTest, FormatsNestedBlockStatements) {
  EXPECT_EQ("{\n  {\n    {}\n  }\n}", format("{{{}}}"));
}

TEST_F(FormatTest, FormatsNestedCall) {
  verifyFormat("Method(f1, f2(f3));");
  verifyFormat("Method(f1(f2, f3()));");
  verifyFormat("Method(f1(f2, (f3())));");
}

TEST_F(FormatTest, NestedNameSpecifiers) {
  verifyFormat("vector<::Type> v;");
  verifyFormat("::ns::SomeFunction(::ns::SomeOtherFunction())");
  verifyFormat("static constexpr bool Bar = decltype(bar())::value;");
  verifyFormat("bool a = 2 < ::SomeFunction();");
}

TEST_F(FormatTest, OnlyGeneratesNecessaryReplacements) {
  EXPECT_EQ("if (a) {\n"
            "  f();\n"
            "}",
            format("if(a){f();}"));
  EXPECT_EQ(4, ReplacementCount);
  EXPECT_EQ("if (a) {\n"
            "  f();\n"
            "}",
            format("if (a) {\n"
                   "  f();\n"
                   "}"));
  EXPECT_EQ(0, ReplacementCount);
  EXPECT_EQ("/*\r\n"
            "\r\n"
            "*/\r\n",
            format("/*\r\n"
                   "\r\n"
                   "*/\r\n"));
  EXPECT_EQ(0, ReplacementCount);
}

TEST_F(FormatTest, RemovesEmptyLines) {
  EXPECT_EQ("class C {\n"
            "  int i;\n"
            "};",
            format("class C {\n"
                   " int i;\n"
                   "\n"
                   "};"));

  // Don't remove empty lines at the start of namespaces or extern "C" blocks.
  EXPECT_EQ("namespace N {\n"
            "\n"
            "int i;\n"
            "}",
            format("namespace N {\n"
                   "\n"
                   "int    i;\n"
                   "}",
                   getGoogleStyle()));
  EXPECT_EQ("extern /**/ \"C\" /**/ {\n"
            "\n"
            "int i;\n"
            "}",
            format("extern /**/ \"C\" /**/ {\n"
                   "\n"
                   "int    i;\n"
                   "}",
                   getGoogleStyle()));

  // ...but do keep inlining and removing empty lines for non-block extern "C"
  // functions.
  verifyFormat("extern \"C\" int f() { return 42; }", getGoogleStyle());
  EXPECT_EQ("extern \"C\" int f() {\n"
            "  int i = 42;\n"
            "  return i;\n"
            "}",
            format("extern \"C\" int f() {\n"
                   "\n"
                   "  int i = 42;\n"
                   "  return i;\n"
                   "}",
                   getGoogleStyle()));

  // Remove empty lines at the beginning and end of blocks.
  EXPECT_EQ("void f() {\n"
            "\n"
            "  if (a) {\n"
            "\n"
            "    f();\n"
            "  }\n"
            "}",
            format("void f() {\n"
                   "\n"
                   "  if (a) {\n"
                   "\n"
                   "    f();\n"
                   "\n"
                   "  }\n"
                   "\n"
                   "}",
                   getLLVMStyle()));
  EXPECT_EQ("void f() {\n"
            "  if (a) {\n"
            "    f();\n"
            "  }\n"
            "}",
            format("void f() {\n"
                   "\n"
                   "  if (a) {\n"
                   "\n"
                   "    f();\n"
                   "\n"
                   "  }\n"
                   "\n"
                   "}",
                   getGoogleStyle()));

  // Don't remove empty lines in more complex control statements.
  EXPECT_EQ("void f() {\n"
            "  if (a) {\n"
            "    f();\n"
            "\n"
            "  } else if (b) {\n"
            "    f();\n"
            "  }\n"
            "}",
            format("void f() {\n"
                   "  if (a) {\n"
                   "    f();\n"
                   "\n"
                   "  } else if (b) {\n"
                   "    f();\n"
                   "\n"
                   "  }\n"
                   "\n"
                   "}"));

  // FIXME: This is slightly inconsistent.
  EXPECT_EQ("namespace {\n"
            "int i;\n"
            "}",
            format("namespace {\n"
                   "int i;\n"
                   "\n"
                   "}"));
  EXPECT_EQ("namespace {\n"
            "int i;\n"
            "\n"
            "} // namespace",
            format("namespace {\n"
                   "int i;\n"
                   "\n"
                   "}  // namespace"));

  FormatStyle Style = getLLVMStyle();
  Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_All;
  Style.MaxEmptyLinesToKeep = 2;
  Style.BreakBeforeBraces = FormatStyle::BS_Custom;
  Style.BraceWrapping.AfterClass = true;
  Style.BraceWrapping.AfterFunction = true;
  Style.KeepEmptyLinesAtTheStartOfBlocks = false;

  EXPECT_EQ("class Foo\n"
            "{\n"
            "  Foo() {}\n"
            "\n"
            "  void funk() {}\n"
            "};",
            format("class Foo\n"
                   "{\n"
                   "  Foo()\n"
                   "  {\n"
                   "  }\n"
                   "\n"
                   "  void funk() {}\n"
                   "};",
                   Style));
}

TEST_F(FormatTest, RecognizesBinaryOperatorKeywords) {
  verifyFormat("x = (a) and (b);");
  verifyFormat("x = (a) or (b);");
  verifyFormat("x = (a) bitand (b);");
  verifyFormat("x = (a) bitor (b);");
  verifyFormat("x = (a) not_eq (b);");
  verifyFormat("x = (a) and_eq (b);");
  verifyFormat("x = (a) or_eq (b);");
  verifyFormat("x = (a) xor (b);");
}

//===----------------------------------------------------------------------===//
// Tests for control statements.
//===----------------------------------------------------------------------===//

TEST_F(FormatTest, FormatIfWithoutCompoundStatement) {
  verifyFormat("if (true)\n  f();\ng();");
  verifyFormat("if (a)\n  if (b)\n    if (c)\n      g();\nh();");
  verifyFormat("if (a)\n  if (b) {\n    f();\n  }\ng();");

  FormatStyle AllowsMergedIf = getLLVMStyle();
  AllowsMergedIf.AlignEscapedNewlinesLeft = true;
  AllowsMergedIf.AllowShortIfStatementsOnASingleLine = true;
  verifyFormat("if (a)\n"
               "  // comment\n"
               "  f();",
               AllowsMergedIf);
  verifyFormat("{\n"
               "  if (a)\n"
               "  label:\n"
               "    f();\n"
               "}",
               AllowsMergedIf);
  verifyFormat("#define A \\\n"
               "  if (a)  \\\n"
               "  label:  \\\n"
               "    f()",
               AllowsMergedIf);
  verifyFormat("if (a)\n"
               "  ;",
               AllowsMergedIf);
  verifyFormat("if (a)\n"
               "  if (b) return;",
               AllowsMergedIf);

  verifyFormat("if (a) // Can't merge this\n"
               "  f();\n",
               AllowsMergedIf);
  verifyFormat("if (a) /* still don't merge */\n"
               "  f();",
               AllowsMergedIf);
  verifyFormat("if (a) { // Never merge this\n"
               "  f();\n"
               "}",
               AllowsMergedIf);
  verifyFormat("if (a) { /* Never merge this */\n"
               "  f();\n"
               "}",
               AllowsMergedIf);

  AllowsMergedIf.ColumnLimit = 14;
  verifyFormat("if (a) return;", AllowsMergedIf);
  verifyFormat("if (aaaaaaaaa)\n"
               "  return;",
               AllowsMergedIf);

  AllowsMergedIf.ColumnLimit = 13;
  verifyFormat("if (a)\n  return;", AllowsMergedIf);
}

TEST_F(FormatTest, FormatLoopsWithoutCompoundStatement) {
  FormatStyle AllowsMergedLoops = getLLVMStyle();
  AllowsMergedLoops.AllowShortLoopsOnASingleLine = true;
  verifyFormat("while (true) continue;", AllowsMergedLoops);
  verifyFormat("for (;;) continue;", AllowsMergedLoops);
  verifyFormat("for (int &v : vec) v *= 2;", AllowsMergedLoops);
  verifyFormat("while (true)\n"
               "  ;",
               AllowsMergedLoops);
  verifyFormat("for (;;)\n"
               "  ;",
               AllowsMergedLoops);
  verifyFormat("for (;;)\n"
               "  for (;;) continue;",
               AllowsMergedLoops);
  verifyFormat("for (;;) // Can't merge this\n"
               "  continue;",
               AllowsMergedLoops);
  verifyFormat("for (;;) /* still don't merge */\n"
               "  continue;",
               AllowsMergedLoops);
}

TEST_F(FormatTest, FormatShortBracedStatements) {
  FormatStyle AllowSimpleBracedStatements = getLLVMStyle();
  AllowSimpleBracedStatements.AllowShortBlocksOnASingleLine = true;

  AllowSimpleBracedStatements.AllowShortIfStatementsOnASingleLine = true;
  AllowSimpleBracedStatements.AllowShortLoopsOnASingleLine = true;

  verifyFormat("if (true) {}", AllowSimpleBracedStatements);
  verifyFormat("while (true) {}", AllowSimpleBracedStatements);
  verifyFormat("for (;;) {}", AllowSimpleBracedStatements);
  verifyFormat("if (true) { f(); }", AllowSimpleBracedStatements);
  verifyFormat("while (true) { f(); }", AllowSimpleBracedStatements);
  verifyFormat("for (;;) { f(); }", AllowSimpleBracedStatements);
  verifyFormat("if (true) { //\n"
               "  f();\n"
               "}",
               AllowSimpleBracedStatements);
  verifyFormat("if (true) {\n"
               "  f();\n"
               "  f();\n"
               "}",
               AllowSimpleBracedStatements);
  verifyFormat("if (true) {\n"
               "  f();\n"
               "} else {\n"
               "  f();\n"
               "}",
               AllowSimpleBracedStatements);

  verifyFormat("template <int> struct A2 {\n"
               "  struct B {};\n"
               "};",
               AllowSimpleBracedStatements);

  AllowSimpleBracedStatements.AllowShortIfStatementsOnASingleLine = false;
  verifyFormat("if (true) {\n"
               "  f();\n"
               "}",
               AllowSimpleBracedStatements);
  verifyFormat("if (true) {\n"
               "  f();\n"
               "} else {\n"
               "  f();\n"
               "}",
               AllowSimpleBracedStatements);

  AllowSimpleBracedStatements.AllowShortLoopsOnASingleLine = false;
  verifyFormat("while (true) {\n"
               "  f();\n"
               "}",
               AllowSimpleBracedStatements);
  verifyFormat("for (;;) {\n"
               "  f();\n"
               "}",
               AllowSimpleBracedStatements);
}

TEST_F(FormatTest, ParseIfElse) {
  verifyFormat("if (true)\n"
               "  if (true)\n"
               "    if (true)\n"
               "      f();\n"
               "    else\n"
               "      g();\n"
               "  else\n"
               "    h();\n"
               "else\n"
               "  i();");
  verifyFormat("if (true)\n"
               "  if (true)\n"
               "    if (true) {\n"
               "      if (true)\n"
               "        f();\n"
               "    } else {\n"
               "      g();\n"
               "    }\n"
               "  else\n"
               "    h();\n"
               "else {\n"
               "  i();\n"
               "}");
  verifyFormat("void f() {\n"
               "  if (a) {\n"
               "  } else {\n"
               "  }\n"
               "}");
}

TEST_F(FormatTest, ElseIf) {
  verifyFormat("if (a) {\n} else if (b) {\n}");
  verifyFormat("if (a)\n"
               "  f();\n"
               "else if (b)\n"
               "  g();\n"
               "else\n"
               "  h();");
  verifyFormat("if (a) {\n"
               "  f();\n"
               "}\n"
               "// or else ..\n"
               "else {\n"
               "  g()\n"
               "}");

  verifyFormat("if (a) {\n"
               "} else if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "               aaaaaaaaaaaaaaaaaaaaaaaaaaaa)) {\n"
               "}");
  verifyFormat("if (a) {\n"
               "} else if (\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n"
               "}",
               getLLVMStyleWithColumns(62));
}

TEST_F(FormatTest, FormatsForLoop) {
  verifyFormat(
      "for (int VeryVeryLongLoopVariable = 0; VeryVeryLongLoopVariable < 10;\n"
      "     ++VeryVeryLongLoopVariable)\n"
      "  ;");
  verifyFormat("for (;;)\n"
               "  f();");
  verifyFormat("for (;;) {\n}");
  verifyFormat("for (;;) {\n"
               "  f();\n"
               "}");
  verifyFormat("for (int i = 0; (i < 10); ++i) {\n}");

  verifyFormat(
      "for (std::vector<UnwrappedLine>::iterator I = UnwrappedLines.begin(),\n"
      "                                          E = UnwrappedLines.end();\n"
      "     I != E; ++I) {\n}");

  verifyFormat(
      "for (MachineFun::iterator IIII = PrevIt, EEEE = F.end(); IIII != EEEE;\n"
      "     ++IIIII) {\n}");
  verifyFormat("for (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaa =\n"
               "         aaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaa;\n"
               "     aaaaaaaaaaa != aaaaaaaaaaaaaaaaaaa; ++aaaaaaaaaaa) {\n}");
  verifyFormat("for (llvm::ArrayRef<NamedDecl *>::iterator\n"
               "         I = FD->getDeclsInPrototypeScope().begin(),\n"
               "         E = FD->getDeclsInPrototypeScope().end();\n"
               "     I != E; ++I) {\n}");
  verifyFormat("for (SmallVectorImpl<TemplateIdAnnotationn *>::iterator\n"
               "         I = Container.begin(),\n"
               "         E = Container.end();\n"
               "     I != E; ++I) {\n}",
               getLLVMStyleWithColumns(76));

  verifyFormat(
      "for (aaaaaaaaaaaaaaaaa aaaaaaaaaaa = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;\n"
      "     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa !=\n"
      "     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "         aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);\n"
      "     ++aaaaaaaaaaa) {\n}");
  verifyFormat("for (int i = 0; i < aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
               "                bbbbbbbbbbbbbbbbbbbb < ccccccccccccccc;\n"
               "     ++i) {\n}");
  verifyFormat("for (int aaaaaaaaaaa = 1; aaaaaaaaaaa <= bbbbbbbbbbbbbbb;\n"
               "     aaaaaaaaaaa++, bbbbbbbbbbbbbbbbb++) {\n"
               "}");
  verifyFormat("for (some_namespace::SomeIterator iter( // force break\n"
               "         aaaaaaaaaa);\n"
               "     iter; ++iter) {\n"
               "}");
  verifyFormat("for (auto aaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "         aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);\n"
               "     aaaaaaaaaaaaaaaaaaaaaaaaaaa != bbbbbbbbbbbbbbbbbbbbbbb;\n"
               "     ++aaaaaaaaaaaaaaaaaaaaaaaaaaa) {");

  FormatStyle NoBinPacking = getLLVMStyle();
  NoBinPacking.BinPackParameters = false;
  verifyFormat("for (int aaaaaaaaaaa = 1;\n"
               "     aaaaaaaaaaa <= aaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaa,\n"
               "                                           aaaaaaaaaaaaaaaa,\n"
               "                                           aaaaaaaaaaaaaaaa,\n"
               "                                           aaaaaaaaaaaaaaaa);\n"
               "     aaaaaaaaaaa++, bbbbbbbbbbbbbbbbb++) {\n"
               "}",
               NoBinPacking);
  verifyFormat(
      "for (std::vector<UnwrappedLine>::iterator I = UnwrappedLines.begin(),\n"
      "                                          E = UnwrappedLines.end();\n"
      "     I != E;\n"
      "     ++I) {\n}",
      NoBinPacking);
}

TEST_F(FormatTest, RangeBasedForLoops) {
  verifyFormat("for (auto aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa :\n"
               "     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n}");
  verifyFormat("for (auto aaaaaaaaaaaaaaaaaaaaa :\n"
               "     aaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaa, aaaaaaaaaaaaa)) {\n}");
  verifyFormat("for (const aaaaaaaaaaaaaaaaaaaaa &aaaaaaaaa :\n"
               "     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n}");
  verifyFormat("for (aaaaaaaaa aaaaaaaaaaaaaaaaaaaaa :\n"
               "     aaaaaaaaaaaa.aaaaaaaaaaaa().aaaaaaaaa().a()) {\n}");
}

TEST_F(FormatTest, ForEachLoops) {
  verifyFormat("void f() {\n"
               "  foreach (Item *item, itemlist) {}\n"
               "  Q_FOREACH (Item *item, itemlist) {}\n"
               "  BOOST_FOREACH (Item *item, itemlist) {}\n"
               "  UNKNOWN_FORACH(Item * item, itemlist) {}\n"
               "}");

  // As function-like macros.
  verifyFormat("#define foreach(x, y)\n"
               "#define Q_FOREACH(x, y)\n"
               "#define BOOST_FOREACH(x, y)\n"
               "#define UNKNOWN_FOREACH(x, y)\n");

  // Not as function-like macros.
  verifyFormat("#define foreach (x, y)\n"
               "#define Q_FOREACH (x, y)\n"
               "#define BOOST_FOREACH (x, y)\n"
               "#define UNKNOWN_FOREACH (x, y)\n");
}

TEST_F(FormatTest, FormatsWhileLoop) {
  verifyFormat("while (true) {\n}");
  verifyFormat("while (true)\n"
               "  f();");
  verifyFormat("while () {\n}");
  verifyFormat("while () {\n"
               "  f();\n"
               "}");
}

TEST_F(FormatTest, FormatsDoWhile) {
  verifyFormat("do {\n"
               "  do_something();\n"
               "} while (something());");
  verifyFormat("do\n"
               "  do_something();\n"
               "while (something());");
}

TEST_F(FormatTest, FormatsSwitchStatement) {
  verifyFormat("switch (x) {\n"
               "case 1:\n"
               "  f();\n"
               "  break;\n"
               "case kFoo:\n"
               "case ns::kBar:\n"
               "case kBaz:\n"
               "  break;\n"
               "default:\n"
               "  g();\n"
               "  break;\n"
               "}");
  verifyFormat("switch (x) {\n"
               "case 1: {\n"
               "  f();\n"
               "  break;\n"
               "}\n"
               "case 2: {\n"
               "  break;\n"
               "}\n"
               "}");
  verifyFormat("switch (x) {\n"
               "case 1: {\n"
               "  f();\n"
               "  {\n"
               "    g();\n"
               "    h();\n"
               "  }\n"
               "  break;\n"
               "}\n"
               "}");
  verifyFormat("switch (x) {\n"
               "case 1: {\n"
               "  f();\n"
               "  if (foo) {\n"
               "    g();\n"
               "    h();\n"
               "  }\n"
               "  break;\n"
               "}\n"
               "}");
  verifyFormat("switch (x) {\n"
               "case 1: {\n"
               "  f();\n"
               "  g();\n"
               "} break;\n"
               "}");
  verifyFormat("switch (test)\n"
               "  ;");
  verifyFormat("switch (x) {\n"
               "default: {\n"
               "  // Do nothing.\n"
               "}\n"
               "}");
  verifyFormat("switch (x) {\n"
               "// comment\n"
               "// if 1, do f()\n"
               "case 1:\n"
               "  f();\n"
               "}");
  verifyFormat("switch (x) {\n"
               "case 1:\n"
               "  // Do amazing stuff\n"
               "  {\n"
               "    f();\n"
               "    g();\n"
               "  }\n"
               "  break;\n"
               "}");
  verifyFormat("#define A          \\\n"
               "  switch (x) {     \\\n"
               "  case a:          \\\n"
               "    foo = b;       \\\n"
               "  }",
               getLLVMStyleWithColumns(20));
  verifyFormat("#define OPERATION_CASE(name)           \\\n"
               "  case OP_name:                        \\\n"
               "    return operations::Operation##name\n",
               getLLVMStyleWithColumns(40));
  verifyFormat("switch (x) {\n"
               "case 1:;\n"
               "default:;\n"
               "  int i;\n"
               "}");

  verifyGoogleFormat("switch (x) {\n"
                     "  case 1:\n"
                     "    f();\n"
                     "    break;\n"
                     "  case kFoo:\n"
                     "  case ns::kBar:\n"
                     "  case kBaz:\n"
                     "    break;\n"
                     "  default:\n"
                     "    g();\n"
                     "    break;\n"
                     "}");
  verifyGoogleFormat("switch (x) {\n"
                     "  case 1: {\n"
                     "    f();\n"
                     "    break;\n"
                     "  }\n"
                     "}");
  verifyGoogleFormat("switch (test)\n"
                     "  ;");

  verifyGoogleFormat("#define OPERATION_CASE(name) \\\n"
                     "  case OP_name:              \\\n"
                     "    return operations::Operation##name\n");
  verifyGoogleFormat("Operation codeToOperation(OperationCode OpCode) {\n"
                     "  // Get the correction operation class.\n"
                     "  switch (OpCode) {\n"
                     "    CASE(Add);\n"
                     "    CASE(Subtract);\n"
                     "    default:\n"
                     "      return operations::Unknown;\n"
                     "  }\n"
                     "#undef OPERATION_CASE\n"
                     "}");
  verifyFormat("DEBUG({\n"
               "  switch (x) {\n"
               "  case A:\n"
               "    f();\n"
               "    break;\n"
               "  // On B:\n"
               "  case B:\n"
               "    g();\n"
               "    break;\n"
               "  }\n"
               "});");
  verifyFormat("switch (a) {\n"
               "case (b):\n"
               "  return;\n"
               "}");

  verifyFormat("switch (a) {\n"
               "case some_namespace::\n"
               "    some_constant:\n"
               "  return;\n"
               "}",
               getLLVMStyleWithColumns(34));
}

TEST_F(FormatTest, CaseRanges) {
  verifyFormat("switch (x) {\n"
               "case 'A' ... 'Z':\n"
               "case 1 ... 5:\n"
               "case a ... b:\n"
               "  break;\n"
               "}");
}

TEST_F(FormatTest, ShortCaseLabels) {
  FormatStyle Style = getLLVMStyle();
  Style.AllowShortCaseLabelsOnASingleLine = true;
  verifyFormat("switch (a) {\n"
               "case 1: x = 1; break;\n"
               "case 2: return;\n"
               "case 3:\n"
               "case 4:\n"
               "case 5: return;\n"
               "case 6: // comment\n"
               "  return;\n"
               "case 7:\n"
               "  // comment\n"
               "  return;\n"
               "case 8:\n"
               "  x = 8; // comment\n"
               "  break;\n"
               "default: y = 1; break;\n"
               "}",
               Style);
  verifyFormat("switch (a) {\n"
               "#if FOO\n"
               "case 0: return 0;\n"
               "#endif\n"
               "}",
               Style);
  verifyFormat("switch (a) {\n"
               "case 1: {\n"
               "}\n"
               "case 2: {\n"
               "  return;\n"
               "}\n"
               "case 3: {\n"
               "  x = 1;\n"
               "  return;\n"
               "}\n"
               "case 4:\n"
               "  if (x)\n"
               "    return;\n"
               "}",
               Style);
  Style.ColumnLimit = 21;
  verifyFormat("switch (a) {\n"
               "case 1: x = 1; break;\n"
               "case 2: return;\n"
               "case 3:\n"
               "case 4:\n"
               "case 5: return;\n"
               "default:\n"
               "  y = 1;\n"
               "  break;\n"
               "}",
               Style);
}

TEST_F(FormatTest, FormatsLabels) {
  verifyFormat("void f() {\n"
               "  some_code();\n"
               "test_label:\n"
               "  some_other_code();\n"
               "  {\n"
               "    some_more_code();\n"
               "  another_label:\n"
               "    some_more_code();\n"
               "  }\n"
               "}");
  verifyFormat("{\n"
               "  some_code();\n"
               "test_label:\n"
               "  some_other_code();\n"
               "}");
  verifyFormat("{\n"
               "  some_code();\n"
               "test_label:;\n"
               "  int i = 0;\n"
               "}");
}

//===----------------------------------------------------------------------===//
// Tests for comments.
//===----------------------------------------------------------------------===//

TEST_F(FormatTest, UnderstandsSingleLineComments) {
  verifyFormat("//* */");
  verifyFormat("// line 1\n"
               "// line 2\n"
               "void f() {}\n");

  verifyFormat("void f() {\n"
               "  // Doesn't do anything\n"
               "}");
  verifyFormat("SomeObject\n"
               "    // Calling someFunction on SomeObject\n"
               "    .someFunction();");
  verifyFormat("auto result = SomeObject\n"
               "                  // Calling someFunction on SomeObject\n"
               "                  .someFunction();");
  verifyFormat("void f(int i,  // some comment (probably for i)\n"
               "       int j,  // some comment (probably for j)\n"
               "       int k); // some comment (probably for k)");
  verifyFormat("void f(int i,\n"
               "       // some comment (probably for j)\n"
               "       int j,\n"
               "       // some comment (probably for k)\n"
               "       int k);");

  verifyFormat("int i    // This is a fancy variable\n"
               "    = 5; // with nicely aligned comment.");

  verifyFormat("// Leading comment.\n"
               "int a; // Trailing comment.");
  verifyFormat("int a; // Trailing comment\n"
               "       // on 2\n"
               "       // or 3 lines.\n"
               "int b;");
  verifyFormat("int a; // Trailing comment\n"
               "\n"
               "// Leading comment.\n"
               "int b;");
  verifyFormat("int a;    // Comment.\n"
               "          // More details.\n"
               "int bbbb; // Another comment.");
  verifyFormat(
      "int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; // comment\n"
      "int bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;   // comment\n"
      "int cccccccccccccccccccccccccccccc;       // comment\n"
      "int ddd;                     // looooooooooooooooooooooooong comment\n"
      "int aaaaaaaaaaaaaaaaaaaaaaa; // comment\n"
      "int bbbbbbbbbbbbbbbbbbbbb;   // comment\n"
      "int ccccccccccccccccccc;     // comment");

  verifyFormat("#include \"a\"     // comment\n"
               "#include \"a/b/c\" // comment");
  verifyFormat("#include <a>     // comment\n"
               "#include <a/b/c> // comment");
  EXPECT_EQ("#include \"a\"     // comment\n"
            "#include \"a/b/c\" // comment",
            format("#include \\\n"
                   "  \"a\" // comment\n"
                   "#include \"a/b/c\" // comment"));

  verifyFormat("enum E {\n"
               "  // comment\n"
               "  VAL_A, // comment\n"
               "  VAL_B\n"
               "};");

  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
      "    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb; // Trailing comment");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
               "    // Comment inside a statement.\n"
               "    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;");
  verifyFormat("SomeFunction(a,\n"
               "             // comment\n"
               "             b + x);");
  verifyFormat("SomeFunction(a, a,\n"
               "             // comment\n"
               "             b + x);");
  verifyFormat(
      "bool aaaaaaaaaaaaa = // comment\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa || aaaaaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa || aaaaaaaaaaaaaaaaaaaaaaaaaaaaa;");

  verifyFormat("int aaaa; // aaaaa\n"
               "int aa;   // aaaaaaa",
               getLLVMStyleWithColumns(20));

  EXPECT_EQ("void f() { // This does something ..\n"
            "}\n"
            "int a; // This is unrelated",
            format("void f()    {     // This does something ..\n"
                   "  }\n"
                   "int   a;     // This is unrelated"));
  EXPECT_EQ("class C {\n"
            "  void f() { // This does something ..\n"
            "  }          // awesome..\n"
            "\n"
            "  int a; // This is unrelated\n"
            "};",
            format("class C{void f()    { // This does something ..\n"
                   "      } // awesome..\n"
                   " \n"
                   "int a;    // This is unrelated\n"
                   "};"));

  EXPECT_EQ("int i; // single line trailing comment",
            format("int i;\\\n// single line trailing comment"));

  verifyGoogleFormat("int a;  // Trailing comment.");

  verifyFormat("someFunction(anotherFunction( // Force break.\n"
               "    parameter));");

  verifyGoogleFormat("#endif  // HEADER_GUARD");

  verifyFormat("const char *test[] = {\n"
               "    // A\n"
               "    \"aaaa\",\n"
               "    // B\n"
               "    \"aaaaa\"};");
  verifyGoogleFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaaaa);  // 81_cols_with_this_comment");
  EXPECT_EQ("D(a, {\n"
            "  // test\n"
            "  int a;\n"
            "});",
            format("D(a, {\n"
                   "// test\n"
                   "int a;\n"
                   "});"));

  EXPECT_EQ("lineWith(); // comment\n"
            "// at start\n"
            "otherLine();",
            format("lineWith();   // comment\n"
                   "// at start\n"
                   "otherLine();"));
  EXPECT_EQ("lineWith(); // comment\n"
            "/*\n"
            " * at start */\n"
            "otherLine();",
            format("lineWith();   // comment\n"
                   "/*\n"
                   " * at start */\n"
                   "otherLine();"));
  EXPECT_EQ("lineWith(); // comment\n"
            "            // at start\n"
            "otherLine();",
            format("lineWith();   // comment\n"
                   " // at start\n"
                   "otherLine();"));

  EXPECT_EQ("lineWith(); // comment\n"
            "// at start\n"
            "otherLine(); // comment",
            format("lineWith();   // comment\n"
                   "// at start\n"
                   "otherLine();   // comment"));
  EXPECT_EQ("lineWith();\n"
            "// at start\n"
            "otherLine(); // comment",
            format("lineWith();\n"
                   " // at start\n"
                   "otherLine();   // comment"));
  EXPECT_EQ("// first\n"
            "// at start\n"
            "otherLine(); // comment",
            format("// first\n"
                   " // at start\n"
                   "otherLine();   // comment"));
  EXPECT_EQ("f();\n"
            "// first\n"
            "// at start\n"
            "otherLine(); // comment",
            format("f();\n"
                   "// first\n"
                   " // at start\n"
                   "otherLine();   // comment"));
  verifyFormat("f(); // comment\n"
               "// first\n"
               "// at start\n"
               "otherLine();");
  EXPECT_EQ("f(); // comment\n"
            "// first\n"
            "// at start\n"
            "otherLine();",
            format("f();   // comment\n"
                   "// first\n"
                   " // at start\n"
                   "otherLine();"));
  EXPECT_EQ("f(); // comment\n"
            "     // first\n"
            "// at start\n"
            "otherLine();",
            format("f();   // comment\n"
                   " // first\n"
                   "// at start\n"
                   "otherLine();"));
  EXPECT_EQ("void f() {\n"
            "  lineWith(); // comment\n"
            "  // at start\n"
            "}",
            format("void              f() {\n"
                   "  lineWith(); // comment\n"
                   "  // at start\n"
                   "}"));
  EXPECT_EQ("int xy; // a\n"
            "int z;  // b",
            format("int xy;    // a\n"
                   "int z;    //b"));
  EXPECT_EQ("int xy; // a\n"
            "int z; // bb",
            format("int xy;    // a\n"
                   "int z;    //bb",
                   getLLVMStyleWithColumns(12)));

  verifyFormat("#define A                                                  \\\n"
               "  int i; /* iiiiiiiiiiiiiiiiiiiii */                       \\\n"
               "  int jjjjjjjjjjjjjjjjjjjjjjjj; /* */",
               getLLVMStyleWithColumns(60));
  verifyFormat(
      "#define A                                                   \\\n"
      "  int i;                        /* iiiiiiiiiiiiiiiiiiiii */ \\\n"
      "  int jjjjjjjjjjjjjjjjjjjjjjjj; /* */",
      getLLVMStyleWithColumns(61));

  verifyFormat("if ( // This is some comment\n"
               "    x + 3) {\n"
               "}");
  EXPECT_EQ("if ( // This is some comment\n"
            "     // spanning two lines\n"
            "    x + 3) {\n"
            "}",
            format("if( // This is some comment\n"
                   "     // spanning two lines\n"
                   " x + 3) {\n"
                   "}"));

  verifyNoCrash("/\\\n/");
  verifyNoCrash("/\\\n* */");
  // The 0-character somehow makes the lexer return a proper comment.
  verifyNoCrash(StringRef("/*\\\0\n/", 6));
}

TEST_F(FormatTest, KeepsParameterWithTrailingCommentsOnTheirOwnLine) {
  EXPECT_EQ("SomeFunction(a,\n"
            "             b, // comment\n"
            "             c);",
            format("SomeFunction(a,\n"
                   "          b, // comment\n"
                   "      c);"));
  EXPECT_EQ("SomeFunction(a, b,\n"
            "             // comment\n"
            "             c);",
            format("SomeFunction(a,\n"
                   "          b,\n"
                   "  // comment\n"
                   "      c);"));
  EXPECT_EQ("SomeFunction(a, b, // comment (unclear relation)\n"
            "             c);",
            format("SomeFunction(a, b, // comment (unclear relation)\n"
                   "      c);"));
  EXPECT_EQ("SomeFunction(a, // comment\n"
            "             b,\n"
            "             c); // comment",
            format("SomeFunction(a,     // comment\n"
                   "          b,\n"
                   "      c); // comment"));
  EXPECT_EQ("aaaaaaaaaa(aaaa(aaaa,\n"
            "                aaaa), //\n"
            "           aaaa, bbbbb);",
            format("aaaaaaaaaa(aaaa(aaaa,\n"
                   "aaaa), //\n"
                   "aaaa, bbbbb);"));
}

TEST_F(FormatTest, RemovesTrailingWhitespaceOfComments) {
  EXPECT_EQ("// comment", format("// comment  "));
  EXPECT_EQ("int aaaaaaa, bbbbbbb; // comment",
            format("int aaaaaaa, bbbbbbb; // comment                   ",
                   getLLVMStyleWithColumns(33)));
  EXPECT_EQ("// comment\\\n", format("// comment\\\n  \t \v   \f   "));
  EXPECT_EQ("// comment    \\\n", format("// comment    \\\n  \t \v   \f   "));
}

TEST_F(FormatTest, UnderstandsBlockComments) {
  verifyFormat("f(/*noSpaceAfterParameterNamingComment=*/true);");
  verifyFormat("void f() { g(/*aaa=*/x, /*bbb=*/!y, /*c=*/::c); }");
  EXPECT_EQ("f(aaaaaaaaaaaaaaaaaaaaaaaaa, /* Trailing comment for aa... */\n"
            "  bbbbbbbbbbbbbbbbbbbbbbbbb);",
            format("f(aaaaaaaaaaaaaaaaaaaaaaaaa ,   \\\n"
                   "/* Trailing comment for aa... */\n"
                   "  bbbbbbbbbbbbbbbbbbbbbbbbb);"));
  EXPECT_EQ(
      "f(aaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "  /* Leading comment for bb... */ bbbbbbbbbbbbbbbbbbbbbbbbb);",
      format("f(aaaaaaaaaaaaaaaaaaaaaaaaa    ,   \n"
             "/* Leading comment for bb... */   bbbbbbbbbbbbbbbbbbbbbbbbb);"));
  EXPECT_EQ(
      "void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaa,\n"
      "    aaaaaaaaaaaaaaaaaa) { /*aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa*/\n"
      "}",
      format("void      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
             "                      aaaaaaaaaaaaaaaaaa  ,\n"
             "    aaaaaaaaaaaaaaaaaa) {   /*aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa*/\n"
             "}"));
  verifyFormat("f(/* aaaaaaaaaaaaaaaaaa = */\n"
               "  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");

  FormatStyle NoBinPacking = getLLVMStyle();
  NoBinPacking.BinPackParameters = false;
  verifyFormat("aaaaaaaa(/* parameter 1 */ aaaaaa,\n"
               "         /* parameter 2 */ aaaaaa,\n"
               "         /* parameter 3 */ aaaaaa,\n"
               "         /* parameter 4 */ aaaaaa);",
               NoBinPacking);

  // Aligning block comments in macros.
  verifyGoogleFormat("#define A        \\\n"
                     "  int i;   /*a*/ \\\n"
                     "  int jjj; /*b*/");
}

TEST_F(FormatTest, AlignsBlockComments) {
  EXPECT_EQ("/*\n"
            " * Really multi-line\n"
            " * comment.\n"
            " */\n"
            "void f() {}",
            format("  /*\n"
                   "   * Really multi-line\n"
                   "   * comment.\n"
                   "   */\n"
                   "  void f() {}"));
  EXPECT_EQ("class C {\n"
            "  /*\n"
            "   * Another multi-line\n"
            "   * comment.\n"
            "   */\n"
            "  void f() {}\n"
            "};",
            format("class C {\n"
                   "/*\n"
                   " * Another multi-line\n"
                   " * comment.\n"
                   " */\n"
                   "void f() {}\n"
                   "};"));
  EXPECT_EQ("/*\n"
            "  1. This is a comment with non-trivial formatting.\n"
            "     1.1. We have to indent/outdent all lines equally\n"
            "         1.1.1. to keep the formatting.\n"
            " */",
            format("  /*\n"
                   "    1. This is a comment with non-trivial formatting.\n"
                   "       1.1. We have to indent/outdent all lines equally\n"
                   "           1.1.1. to keep the formatting.\n"
                   "   */"));
  EXPECT_EQ("/*\n"
            "Don't try to outdent if there's not enough indentation.\n"
            "*/",
            format("  /*\n"
                   " Don't try to outdent if there's not enough indentation.\n"
                   " */"));

  EXPECT_EQ("int i; /* Comment with empty...\n"
            "        *\n"
            "        * line. */",
            format("int i; /* Comment with empty...\n"
                   "        *\n"
                   "        * line. */"));
  EXPECT_EQ("int foobar = 0; /* comment */\n"
            "int bar = 0;    /* multiline\n"
            "                   comment 1 */\n"
            "int baz = 0;    /* multiline\n"
            "                   comment 2 */\n"
            "int bzz = 0;    /* multiline\n"
            "                   comment 3 */",
            format("int foobar = 0; /* comment */\n"
                   "int bar = 0;    /* multiline\n"
                   "                   comment 1 */\n"
                   "int baz = 0; /* multiline\n"
                   "                comment 2 */\n"
                   "int bzz = 0;         /* multiline\n"
                   "                        comment 3 */"));
  EXPECT_EQ("int foobar = 0; /* comment */\n"
            "int bar = 0;    /* multiline\n"
            "   comment */\n"
            "int baz = 0;    /* multiline\n"
            "comment */",
            format("int foobar = 0; /* comment */\n"
                   "int bar = 0; /* multiline\n"
                   "comment */\n"
                   "int baz = 0;        /* multiline\n"
                   "comment */"));
}

TEST_F(FormatTest, CommentReflowingCanBeTurnedOff) {
  FormatStyle Style = getLLVMStyleWithColumns(20);
  Style.ReflowComments = false;
  verifyFormat("// aaaaaaaaa aaaaaaaaaa aaaaaaaaaa", Style);
  verifyFormat("/* aaaaaaaaa aaaaaaaaaa aaaaaaaaaa */", Style);
}

TEST_F(FormatTest, CorrectlyHandlesLengthOfBlockComments) {
  EXPECT_EQ("double *x; /* aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
            "              aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa */",
            format("double *x; /* aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
                   "              aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa */"));
  EXPECT_EQ(
      "void ffffffffffff(\n"
      "    int aaaaaaaa, int bbbbbbbb,\n"
      "    int cccccccccccc) { /*\n"
      "                           aaaaaaaaaa\n"
      "                           aaaaaaaaaaaaa\n"
      "                           bbbbbbbbbbbbbb\n"
      "                           bbbbbbbbbb\n"
      "                         */\n"
      "}",
      format("void ffffffffffff(int aaaaaaaa, int bbbbbbbb, int cccccccccccc)\n"
             "{ /*\n"
             "     aaaaaaaaaa aaaaaaaaaaaaa\n"
             "     bbbbbbbbbbbbbb bbbbbbbbbb\n"
             "   */\n"
             "}",
             getLLVMStyleWithColumns(40)));
}

TEST_F(FormatTest, DontBreakNonTrailingBlockComments) {
  EXPECT_EQ("void ffffffffff(\n"
            "    int aaaaa /* test */);",
            format("void ffffffffff(int aaaaa /* test */);",
                   getLLVMStyleWithColumns(35)));
}

TEST_F(FormatTest, SplitsLongCxxComments) {
  EXPECT_EQ("// A comment that\n"
            "// doesn't fit on\n"
            "// one line",
            format("// A comment that doesn't fit on one line",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/// A comment that\n"
            "/// doesn't fit on\n"
            "/// one line",
            format("/// A comment that doesn't fit on one line",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("//! A comment that\n"
            "//! doesn't fit on\n"
            "//! one line",
            format("//! A comment that doesn't fit on one line",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("// a b c d\n"
            "// e f  g\n"
            "// h i j k",
            format("// a b c d e f  g h i j k", getLLVMStyleWithColumns(10)));
  EXPECT_EQ(
      "// a b c d\n"
      "// e f  g\n"
      "// h i j k",
      format("\\\n// a b c d e f  g h i j k", getLLVMStyleWithColumns(10)));
  EXPECT_EQ("if (true) // A comment that\n"
            "          // doesn't fit on\n"
            "          // one line",
            format("if (true) // A comment that doesn't fit on one line   ",
                   getLLVMStyleWithColumns(30)));
  EXPECT_EQ("//    Don't_touch_leading_whitespace",
            format("//    Don't_touch_leading_whitespace",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("// Add leading\n"
            "// whitespace",
            format("//Add leading whitespace", getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/// Add leading\n"
            "/// whitespace",
            format("///Add leading whitespace", getLLVMStyleWithColumns(20)));
  EXPECT_EQ("//! Add leading\n"
            "//! whitespace",
            format("//!Add leading whitespace", getLLVMStyleWithColumns(20)));
  EXPECT_EQ("// whitespace", format("//whitespace", getLLVMStyle()));
  EXPECT_EQ("// Even if it makes the line exceed the column\n"
            "// limit",
            format("//Even if it makes the line exceed the column limit",
                   getLLVMStyleWithColumns(51)));
  EXPECT_EQ("//--But not here", format("//--But not here", getLLVMStyle()));

  EXPECT_EQ("// aa bb cc dd",
            format("// aa bb             cc dd                   ",
                   getLLVMStyleWithColumns(15)));

  EXPECT_EQ("// A comment before\n"
            "// a macro\n"
            "// definition\n"
            "#define a b",
            format("// A comment before a macro definition\n"
                   "#define a b",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("void ffffff(\n"
            "    int aaaaaaaaa,  // wwww\n"
            "    int bbbbbbbbbb, // xxxxxxx\n"
            "                    // yyyyyyyyyy\n"
            "    int c, int d, int e) {}",
            format("void ffffff(\n"
                   "    int aaaaaaaaa, // wwww\n"
                   "    int bbbbbbbbbb, // xxxxxxx yyyyyyyyyy\n"
                   "    int c, int d, int e) {}",
                   getLLVMStyleWithColumns(40)));
  EXPECT_EQ("//\t aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
            format("//\t aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ(
      "#define XXX // a b c d\n"
      "            // e f g h",
      format("#define XXX // a b c d e f g h", getLLVMStyleWithColumns(22)));
  EXPECT_EQ(
      "#define XXX // q w e r\n"
      "            // t y u i",
      format("#define XXX //q w e r t y u i", getLLVMStyleWithColumns(22)));
  EXPECT_EQ("{\n"
            "  //\n"
            "  //\\\n"
            "  // long 1 2 3 4\n"
            "  // 5\n"
            "}",
            format("{\n"
                   "  //\n"
                   "  //\\\n"
                   "  // long 1 2 3 4 5\n"
                   "}",
                   getLLVMStyleWithColumns(20)));
}

TEST_F(FormatTest, PreservesHangingIndentInCxxComments) {
  EXPECT_EQ("//     A comment\n"
            "//     that doesn't\n"
            "//     fit on one\n"
            "//     line",
            format("//     A comment that doesn't fit on one line",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("///     A comment\n"
            "///     that doesn't\n"
            "///     fit on one\n"
            "///     line",
            format("///     A comment that doesn't fit on one line",
                   getLLVMStyleWithColumns(20)));
}

TEST_F(FormatTest, DontSplitLineCommentsWithEscapedNewlines) {
  EXPECT_EQ("// aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\\n"
            "// aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\\n"
            "// aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
            format("// aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\\n"
                   "// aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\\n"
                   "// aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"));
  EXPECT_EQ("int a; // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\\\n"
            "       // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\\\n"
            "       // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
            format("int a; // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\\\n"
                   "       // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\\\n"
                   "       // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
                   getLLVMStyleWithColumns(50)));
  // FIXME: One day we might want to implement adjustment of leading whitespace
  // of the consecutive lines in this kind of comment:
  EXPECT_EQ("double\n"
            "    a; // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\\\n"
            "          // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\\\n"
            "          // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
            format("double a; // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\\\n"
                   "          // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\\\n"
                   "          // AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
                   getLLVMStyleWithColumns(49)));
}

TEST_F(FormatTest, DontSplitLineCommentsWithPragmas) {
  FormatStyle Pragmas = getLLVMStyleWithColumns(30);
  Pragmas.CommentPragmas = "^ IWYU pragma:";
  EXPECT_EQ(
      "// IWYU pragma: aaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbb",
      format("// IWYU pragma: aaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbb", Pragmas));
  EXPECT_EQ(
      "/* IWYU pragma: aaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbb */",
      format("/* IWYU pragma: aaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbb */", Pragmas));
}

TEST_F(FormatTest, PriorityOfCommentBreaking) {
  EXPECT_EQ("if (xxx ==\n"
            "        yyy && // aaaaaaaaaaaa bbbbbbbbb\n"
            "    zzz)\n"
            "  q();",
            format("if (xxx == yyy && // aaaaaaaaaaaa bbbbbbbbb\n"
                   "    zzz) q();",
                   getLLVMStyleWithColumns(40)));
  EXPECT_EQ("if (xxxxxxxxxx ==\n"
            "        yyy && // aaaaaa bbbbbbbb cccc\n"
            "    zzz)\n"
            "  q();",
            format("if (xxxxxxxxxx == yyy && // aaaaaa bbbbbbbb cccc\n"
                   "    zzz) q();",
                   getLLVMStyleWithColumns(40)));
  EXPECT_EQ("if (xxxxxxxxxx &&\n"
            "        yyy || // aaaaaa bbbbbbbb cccc\n"
            "    zzz)\n"
            "  q();",
            format("if (xxxxxxxxxx && yyy || // aaaaaa bbbbbbbb cccc\n"
                   "    zzz) q();",
                   getLLVMStyleWithColumns(40)));
  EXPECT_EQ("fffffffff(\n"
            "    &xxx, // aaaaaaaaaaaa bbbbbbbbbbb\n"
            "    zzz);",
            format("fffffffff(&xxx, // aaaaaaaaaaaa bbbbbbbbbbb\n"
                   " zzz);",
                   getLLVMStyleWithColumns(40)));
}

TEST_F(FormatTest, MultiLineCommentsInDefines) {
  EXPECT_EQ("#define A(x) /* \\\n"
            "  a comment     \\\n"
            "  inside */     \\\n"
            "  f();",
            format("#define A(x) /* \\\n"
                   "  a comment     \\\n"
                   "  inside */     \\\n"
                   "  f();",
                   getLLVMStyleWithColumns(17)));
  EXPECT_EQ("#define A(      \\\n"
            "    x) /*       \\\n"
            "  a comment     \\\n"
            "  inside */     \\\n"
            "  f();",
            format("#define A(      \\\n"
                   "    x) /*       \\\n"
                   "  a comment     \\\n"
                   "  inside */     \\\n"
                   "  f();",
                   getLLVMStyleWithColumns(17)));
}

TEST_F(FormatTest, ParsesCommentsAdjacentToPPDirectives) {
  EXPECT_EQ("namespace {}\n// Test\n#define A",
            format("namespace {}\n   // Test\n#define A"));
  EXPECT_EQ("namespace {}\n/* Test */\n#define A",
            format("namespace {}\n   /* Test */\n#define A"));
  EXPECT_EQ("namespace {}\n/* Test */ #define A",
            format("namespace {}\n   /* Test */    #define A"));
}

TEST_F(FormatTest, SplitsLongLinesInComments) {
  EXPECT_EQ("/* This is a long\n"
            " * comment that\n"
            " * doesn't\n"
            " * fit on one line.\n"
            " */",
            format("/* "
                   "This is a long                                         "
                   "comment that "
                   "doesn't                                    "
                   "fit on one line.  */",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ(
      "/* a b c d\n"
      " * e f  g\n"
      " * h i j k\n"
      " */",
      format("/* a b c d e f  g h i j k */", getLLVMStyleWithColumns(10)));
  EXPECT_EQ(
      "/* a b c d\n"
      " * e f  g\n"
      " * h i j k\n"
      " */",
      format("\\\n/* a b c d e f  g h i j k */", getLLVMStyleWithColumns(10)));
  EXPECT_EQ("/*\n"
            "This is a long\n"
            "comment that doesn't\n"
            "fit on one line.\n"
            "*/",
            format("/*\n"
                   "This is a long                                         "
                   "comment that doesn't                                    "
                   "fit on one line.                                      \n"
                   "*/",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/*\n"
            " * This is a long\n"
            " * comment that\n"
            " * doesn't fit on\n"
            " * one line.\n"
            " */",
            format("/*      \n"
                   " * This is a long "
                   "   comment that     "
                   "   doesn't fit on   "
                   "   one line.                                            \n"
                   " */",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/*\n"
            " * This_is_a_comment_with_words_that_dont_fit_on_one_line\n"
            " * so_it_should_be_broken\n"
            " * wherever_a_space_occurs\n"
            " */",
            format("/*\n"
                   " * This_is_a_comment_with_words_that_dont_fit_on_one_line "
                   "   so_it_should_be_broken "
                   "   wherever_a_space_occurs                             \n"
                   " */",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/*\n"
            " *    This_comment_can_not_be_broken_into_lines\n"
            " */",
            format("/*\n"
                   " *    This_comment_can_not_be_broken_into_lines\n"
                   " */",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("{\n"
            "  /*\n"
            "  This is another\n"
            "  long comment that\n"
            "  doesn't fit on one\n"
            "  line    1234567890\n"
            "  */\n"
            "}",
            format("{\n"
                   "/*\n"
                   "This is another     "
                   "  long comment that "
                   "  doesn't fit on one"
                   "  line    1234567890\n"
                   "*/\n"
                   "}",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("{\n"
            "  /*\n"
            "   * This        i s\n"
            "   * another comment\n"
            "   * t hat  doesn' t\n"
            "   * fit on one l i\n"
            "   * n e\n"
            "   */\n"
            "}",
            format("{\n"
                   "/*\n"
                   " * This        i s"
                   "   another comment"
                   "   t hat  doesn' t"
                   "   fit on one l i"
                   "   n e\n"
                   " */\n"
                   "}",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/*\n"
            " * This is a long\n"
            " * comment that\n"
            " * doesn't fit on\n"
            " * one line\n"
            " */",
            format("   /*\n"
                   "    * This is a long comment that doesn't fit on one line\n"
                   "    */",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("{\n"
            "  if (something) /* This is a\n"
            "                    long\n"
            "                    comment */\n"
            "    ;\n"
            "}",
            format("{\n"
                   "  if (something) /* This is a long comment */\n"
                   "    ;\n"
                   "}",
                   getLLVMStyleWithColumns(30)));

  EXPECT_EQ("/* A comment before\n"
            " * a macro\n"
            " * definition */\n"
            "#define a b",
            format("/* A comment before a macro definition */\n"
                   "#define a b",
                   getLLVMStyleWithColumns(20)));

  EXPECT_EQ("/* some comment\n"
            "     *   a comment\n"
            "* that we break\n"
            " * another comment\n"
            "* we have to break\n"
            "* a left comment\n"
            " */",
            format("  /* some comment\n"
                   "       *   a comment that we break\n"
                   "   * another comment we have to break\n"
                   "* a left comment\n"
                   "   */",
                   getLLVMStyleWithColumns(20)));

  EXPECT_EQ("/**\n"
            " * multiline block\n"
            " * comment\n"
            " *\n"
            " */",
            format("/**\n"
                   " * multiline block comment\n"
                   " *\n"
                   " */",
                   getLLVMStyleWithColumns(20)));

  EXPECT_EQ("/*\n"
            "\n"
            "\n"
            "    */\n",
            format("  /*       \n"
                   "      \n"
                   "               \n"
                   "      */\n"));

  EXPECT_EQ("/* a a */",
            format("/* a a            */", getLLVMStyleWithColumns(15)));
  EXPECT_EQ("/* a a bc  */",
            format("/* a a            bc  */", getLLVMStyleWithColumns(15)));
  EXPECT_EQ("/* aaa aaa\n"
            " * aaaaa */",
            format("/* aaa aaa aaaaa       */", getLLVMStyleWithColumns(15)));
  EXPECT_EQ("/* aaa aaa\n"
            " * aaaaa     */",
            format("/* aaa aaa aaaaa     */", getLLVMStyleWithColumns(15)));
}

TEST_F(FormatTest, SplitsLongLinesInCommentsInPreprocessor) {
  EXPECT_EQ("#define X          \\\n"
            "  /*               \\\n"
            "   Test            \\\n"
            "   Macro comment   \\\n"
            "   with a long     \\\n"
            "   line            \\\n"
            "   */              \\\n"
            "  A + B",
            format("#define X \\\n"
                   "  /*\n"
                   "   Test\n"
                   "   Macro comment with a long  line\n"
                   "   */ \\\n"
                   "  A + B",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("#define X          \\\n"
            "  /* Macro comment \\\n"
            "     with a long   \\\n"
            "     line */       \\\n"
            "  A + B",
            format("#define X \\\n"
                   "  /* Macro comment with a long\n"
                   "     line */ \\\n"
                   "  A + B",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("#define X          \\\n"
            "  /* Macro comment \\\n"
            "   * with a long   \\\n"
            "   * line */       \\\n"
            "  A + B",
            format("#define X \\\n"
                   "  /* Macro comment with a long  line */ \\\n"
                   "  A + B",
                   getLLVMStyleWithColumns(20)));
}

TEST_F(FormatTest, CommentsInStaticInitializers) {
  EXPECT_EQ(
      "static SomeType type = {aaaaaaaaaaaaaaaaaaaa, /* comment */\n"
      "                        aaaaaaaaaaaaaaaaaaaa /* comment */,\n"
      "                        /* comment */ aaaaaaaaaaaaaaaaaaaa,\n"
      "                        aaaaaaaaaaaaaaaaaaaa, // comment\n"
      "                        aaaaaaaaaaaaaaaaaaaa};",
      format("static SomeType type = { aaaaaaaaaaaaaaaaaaaa  ,  /* comment */\n"
             "                   aaaaaaaaaaaaaaaaaaaa   /* comment */ ,\n"
             "                     /* comment */   aaaaaaaaaaaaaaaaaaaa ,\n"
             "              aaaaaaaaaaaaaaaaaaaa ,   // comment\n"
             "                  aaaaaaaaaaaaaaaaaaaa };"));
  verifyFormat("static SomeType type = {aaaaaaaaaaa, // comment for aa...\n"
               "                        bbbbbbbbbbb, ccccccccccc};");
  verifyFormat("static SomeType type = {aaaaaaaaaaa,\n"
               "                        // comment for bb....\n"
               "                        bbbbbbbbbbb, ccccccccccc};");
  verifyGoogleFormat(
      "static SomeType type = {aaaaaaaaaaa,  // comment for aa...\n"
      "                        bbbbbbbbbbb, ccccccccccc};");
  verifyGoogleFormat("static SomeType type = {aaaaaaaaaaa,\n"
                     "                        // comment for bb....\n"
                     "                        bbbbbbbbbbb, ccccccccccc};");

  verifyFormat("S s = {{a, b, c},  // Group #1\n"
               "       {d, e, f},  // Group #2\n"
               "       {g, h, i}}; // Group #3");
  verifyFormat("S s = {{// Group #1\n"
               "        a, b, c},\n"
               "       {// Group #2\n"
               "        d, e, f},\n"
               "       {// Group #3\n"
               "        g, h, i}};");

  EXPECT_EQ("S s = {\n"
            "    // Some comment\n"
            "    a,\n"
            "\n"
            "    // Comment after empty line\n"
            "    b}",
            format("S s =    {\n"
                   "      // Some comment\n"
                   "  a,\n"
                   "  \n"
                   "     // Comment after empty line\n"
                   "      b\n"
                   "}"));
  EXPECT_EQ("S s = {\n"
            "    /* Some comment */\n"
            "    a,\n"
            "\n"
            "    /* Comment after empty line */\n"
            "    b}",
            format("S s =    {\n"
                   "      /* Some comment */\n"
                   "  a,\n"
                   "  \n"
                   "     /* Comment after empty line */\n"
                   "      b\n"
                   "}"));
  verifyFormat("const uint8_t aaaaaaaaaaaaaaaaaaaaaa[0] = {\n"
               "    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // comment\n"
               "    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // comment\n"
               "    0x00, 0x00, 0x00, 0x00};            // comment\n");
}

TEST_F(FormatTest, LineCommentsAfterRightBrace) {
  EXPECT_EQ("if (true) { // comment about branch\n"
            "  // comment about f\n"
            "  f();\n"
            "}",
            format("if (true) { // comment about branch\n"
                   "  // comment about f\n"
                   "  f();\n"
                   "}",
                   getLLVMStyleWithColumns(80)));
  EXPECT_EQ("if (1) { // if line 1\n"
            "         // if line 2\n"
            "         // if line 3\n"
            "  // f line 1\n"
            "  // f line 2\n"
            "  f();\n"
            "} else { // else line 1\n"
            "         // else line 2\n"
            "         // else line 3\n"
            "  // g line 1\n"
            "  g();\n"
            "}",
            format("if (1) { // if line 1\n"
                   "          // if line 2\n"
                   "        // if line 3\n"
                   "  // f line 1\n"
                   "    // f line 2\n"
                   "  f();\n"
                   "} else { // else line 1\n"
                   "        // else line 2\n"
                   "         // else line 3\n"
                   "  // g line 1\n"
                   "  g();\n"
                   "}"));
  EXPECT_EQ("do { // line 1\n"
            "     // line 2\n"
            "     // line 3\n"
            "  f();\n"
            "} while (true);",
            format("do { // line 1\n"
                   "     // line 2\n"
                   "   // line 3\n"
                   "  f();\n"
                   "} while (true);",
                   getLLVMStyleWithColumns(80)));
  EXPECT_EQ("while (a < b) { // line 1\n"
            "  // line 2\n"
            "  // line 3\n"
            "  f();\n"
            "}",
            format("while (a < b) {// line 1\n"
                   "  // line 2\n"
                   "  // line 3\n"
                   "  f();\n"
                   "}",
                   getLLVMStyleWithColumns(80)));
}

TEST_F(FormatTest, ReflowsComments) {
  // Break a long line and reflow with the full next line.
  EXPECT_EQ("// long long long\n"
            "// long long",
            format("// long long long long\n"
                   "// long",
                   getLLVMStyleWithColumns(20)));

  // Keep the trailing newline while reflowing.
  EXPECT_EQ("// long long long\n"
            "// long long\n",
            format("// long long long long\n"
                   "// long\n",
                   getLLVMStyleWithColumns(20)));

  // Break a long line and reflow with a part of the next line.
  EXPECT_EQ("// long long long\n"
            "// long long\n"
            "// long_long",
            format("// long long long long\n"
                   "// long long_long",
                   getLLVMStyleWithColumns(20)));

  // Break but do not reflow if the first word from the next line is too long.
  EXPECT_EQ("// long long long\n"
            "// long\n"
            "// long_long_long\n",
            format("// long long long long\n"
                   "// long_long_long\n",
                   getLLVMStyleWithColumns(20)));

  // Don't break or reflow short lines.
  verifyFormat("// long\n"
               "// long long long lo\n"
               "// long long long lo\n"
               "// long",
               getLLVMStyleWithColumns(20));

  // Keep prefixes and decorations while reflowing.
  EXPECT_EQ("/// long long long\n"
            "/// long long\n",
            format("/// long long long long\n"
                   "/// long\n",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("//! long long long\n"
            "//! long long\n",
            format("//! long long long long\n"
                   "//! long\n",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/* long long long\n"
            " * long long */",
            format("/* long long long long\n"
                   " * long */",
                   getLLVMStyleWithColumns(20)));

  // Don't bring leading whitespace up while reflowing.
  EXPECT_EQ("/*  long long long\n"
            " * long long long\n"
            " */",
            format("/*  long long long long\n"
                   " *  long long\n"
                   " */",
                   getLLVMStyleWithColumns(20)));

  // Reflow the last line of a block comment with its trailing '*/'.
  EXPECT_EQ("/* long long long\n"
            "   long long */",
            format("/* long long long long\n"
                   "   long */",
                   getLLVMStyleWithColumns(20)));

  // Reflow two short lines; keep the postfix of the last one.
  EXPECT_EQ("/* long long long\n"
            " * long long long */",
            format("/* long long long long\n"
                   " * long\n"
                   " * long */",
                   getLLVMStyleWithColumns(20)));

  // Put the postfix of the last short reflow line on a newline if it doesn't
  // fit.
  EXPECT_EQ("/* long long long\n"
            " * long long longg\n"
            " */",
            format("/* long long long long\n"
                   " * long\n"
                   " * longg */",
                   getLLVMStyleWithColumns(20)));

  // Break single line block comments that are first in the line with ' *'
  // decoration.
  EXPECT_EQ("/* long long long\n"
            " * long */",
            format("/* long long long long */", getLLVMStyleWithColumns(20)));

  // Break single line block comment that are not first in the line with '  '
  // decoration.
  EXPECT_EQ("int i; /* long long\n"
            "          long */",
            format("int i; /* long long long */", getLLVMStyleWithColumns(20)));

  // Reflow a line that goes just over the column limit.
  EXPECT_EQ("// long long long\n"
            "// lon long",
            format("// long long long lon\n"
                   "// long",
                   getLLVMStyleWithColumns(20)));

  // Stop reflowing if the next line has a different indentation than the
  // previous line.
  EXPECT_EQ("// long long long\n"
            "// long\n"
            "//  long long\n"
            "//  long",
            format("// long long long long\n"
                   "//  long long\n"
                   "//  long",
                   getLLVMStyleWithColumns(20)));

  // Reflow into the last part of a really long line that has been broken into
  // multiple lines.
  EXPECT_EQ("// long long long\n"
            "// long long long\n"
            "// long long long\n",
            format("// long long long long long long long long\n"
                   "// long\n",
                   getLLVMStyleWithColumns(20)));

  // Break the first line, then reflow the beginning of the second and third
  // line up.
  EXPECT_EQ("// long long long\n"
            "// lon1 lon2 lon2\n"
            "// lon2 lon3 lon3",
            format("// long long long lon1\n"
                   "// lon2 lon2 lon2\n"
                   "// lon3 lon3",
                   getLLVMStyleWithColumns(20)));

  // Reflow the beginning of the second line, then break the rest.
  EXPECT_EQ("// long long long\n"
            "// lon1 lon2 lon2\n"
            "// lon2 lon2 lon2\n"
            "// lon3",
            format("// long long long lon1\n"
                   "// lon2 lon2 lon2 lon2 lon2 lon3",
                   getLLVMStyleWithColumns(20)));

  // Shrink the first line, then reflow the second line up.
  EXPECT_EQ("// long long long", format("// long              long\n"
                                        "// long",
                                        getLLVMStyleWithColumns(20)));

  // Don't shrink leading whitespace.
  EXPECT_EQ("int i; ///           a",
            format("int i; ///           a", getLLVMStyleWithColumns(20)));

  // Shrink trailing whitespace if there is no postfix and reflow.
  EXPECT_EQ("// long long long\n"
            "// long long",
            format("// long long long long    \n"
                   "// long",
                   getLLVMStyleWithColumns(20)));

  // Shrink trailing whitespace to a single one if there is postfix.
  EXPECT_EQ("/* long long long */",
            format("/* long long long     */", getLLVMStyleWithColumns(20)));

  // Break a block comment postfix if exceeding the line limit.
  EXPECT_EQ("/*               long\n"
            " */",
            format("/*               long */", getLLVMStyleWithColumns(20)));

  // Reflow indented comments.
  EXPECT_EQ("{\n"
            "  // long long long\n"
            "  // long long\n"
            "  int i; /* long lon\n"
            "            g long\n"
            "          */\n"
            "}",
            format("{\n"
                   "  // long long long long\n"
                   "  // long\n"
                   "  int i; /* long lon g\n"
                   "            long */\n"
                   "}",
                   getLLVMStyleWithColumns(20)));

  // Don't realign trailing comments after reflow has happened.
  EXPECT_EQ("// long long long\n"
            "// long long\n"
            "long i; // long",
            format("// long long long long\n"
                   "// long\n"
                   "long i; // long",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("// long long long\n"
            "// longng long long\n"
            "// long lo",
            format("// long long long longng\n"
                   "// long long long\n"
                   "// lo",
                   getLLVMStyleWithColumns(20)));

  // Reflow lines after a broken line.
  EXPECT_EQ("int a; // Trailing\n"
            "       // comment on\n"
            "       // 2 or 3\n"
            "       // lines.\n",
            format("int a; // Trailing comment\n"
                   "       // on 2\n"
                   "       // or 3\n"
                   "       // lines.\n",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/// This long line\n"
            "/// gets reflown.\n",
            format("/// This long line gets\n"
                   "/// reflown.\n",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("//! This long line\n"
            "//! gets reflown.\n",
            format(" //! This long line gets\n"
                   " //! reflown.\n",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/* This long line\n"
            " * gets reflown.\n"
            " */\n",
            format("/* This long line gets\n"
                   " * reflown.\n"
                   " */\n",
                   getLLVMStyleWithColumns(20)));

  // Reflow after indentation makes a line too long.
  EXPECT_EQ("{\n"
            "  // long long long\n"
            "  // lo long\n"
            "}\n",
            format("{\n"
                   "// long long long lo\n"
                   "// long\n"
                   "}\n",
                   getLLVMStyleWithColumns(20)));

  // Break and reflow multiple lines.
  EXPECT_EQ("/*\n"
            " * Reflow the end of\n"
            " * line by 11 22 33\n"
            " * 4.\n"
            " */\n",
            format("/*\n"
                   " * Reflow the end of line\n"
                   " * by\n"
                   " * 11\n"
                   " * 22\n"
                   " * 33\n"
                   " * 4.\n"
                   " */\n",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/// First line gets\n"
            "/// broken. Second\n"
            "/// line gets\n"
            "/// reflown and\n"
            "/// broken. Third\n"
            "/// gets reflown.\n",
            format("/// First line gets broken.\n"
                   "/// Second line gets reflown and broken.\n"
                   "/// Third gets reflown.\n",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("int i; // first long\n"
            "       // long snd\n"
            "       // long.\n",
            format("int i; // first long long\n"
                   "       // snd long.\n",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("{\n"
            "  // first long line\n"
            "  // line second\n"
            "  // long line line\n"
            "  // third long line\n"
            "  // line\n"
            "}\n",
            format("{\n"
                   "  // first long line line\n"
                   "  // second long line line\n"
                   "  // third long line line\n"
                   "}\n",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("int i; /* first line\n"
            "        * second\n"
            "        * line third\n"
            "        * line\n"
            "        */",
            format("int i; /* first line\n"
                   "        * second line\n"
                   "        * third line\n"
                   "        */",
                   getLLVMStyleWithColumns(20)));

  // Reflow the last two lines of a section that starts with a line having
  // different indentation.
  EXPECT_EQ(
      "//     long\n"
      "// long long long\n"
      "// long long",
      format("//     long\n"
             "// long long long long\n"
             "// long",
             getLLVMStyleWithColumns(20)));

  // Keep the block comment endling '*/' while reflowing.
  EXPECT_EQ("/* Long long long\n"
            " * line short */\n",
            format("/* Long long long line\n"
                   " * short */\n",
                   getLLVMStyleWithColumns(20)));

  // Don't reflow between separate blocks of comments.
  EXPECT_EQ("/* First comment\n"
            " * block will */\n"
            "/* Snd\n"
            " */\n",
            format("/* First comment block\n"
                   " * will */\n"
                   "/* Snd\n"
                   " */\n",
                   getLLVMStyleWithColumns(20)));

  // Don't reflow across blank comment lines.
  EXPECT_EQ("int i; // This long\n"
            "       // line gets\n"
            "       // broken.\n"
            "       //  \n"
            "       // keep.\n",
            format("int i; // This long line gets broken.\n"
                   "       //  \n"
                   "       // keep.\n",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("{\n"
            "  /// long long long\n"
            "  /// long long\n"
            "  ///\n"
            "  /// long\n"
            "}",
            format("{\n"
                   "  /// long long long long\n"
                   "  /// long\n"
                   "  ///\n"
                   "  /// long\n"
                   "}",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("//! long long long\n"
            "//! long\n"
            "\n"
            "//! long",
            format("//! long long long long\n"
                   "\n"
                   "//! long",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/* long long long\n"
            "   long\n"
            "\n"
            "   long */",
            format("/* long long long long\n"
                   "\n"
                   "   long */",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/* long long long\n"
            " * long\n"
            " *\n"
            " * long */",
            format("/* long long long long\n"
                   " *\n"
                   " * long */",
                   getLLVMStyleWithColumns(20)));
  
  // Don't reflow lines having content that is a single character.
  EXPECT_EQ("// long long long\n"
            "// long\n"
            "// l",
            format("// long long long long\n"
                   "// l",
                   getLLVMStyleWithColumns(20)));

  // Don't reflow lines starting with two punctuation characters.
  EXPECT_EQ("// long long long\n"
            "// long\n"
            "// ... --- ...",
            format(
                "// long long long long\n"
                "// ... --- ...",
                getLLVMStyleWithColumns(20)));
  // Reflow lines that have a non-punctuation character among their first 2
  // characters.
  EXPECT_EQ("// long long long\n"
            "// long 'long'",
            format(
                "// long long long long\n"
                "// 'long'",
                getLLVMStyleWithColumns(20)));

  // Don't reflow between separate blocks of comments.
  EXPECT_EQ("/* First comment\n"
            " * block will */\n"
            "/* Snd\n"
            " */\n",
            format("/* First comment block\n"
                   " * will */\n"
                   "/* Snd\n"
                   " */\n",
                   getLLVMStyleWithColumns(20)));

  // Don't reflow lines having different indentation.
  EXPECT_EQ("// long long long\n"
            "// long\n"
            "//  long",
            format("// long long long long\n"
                   "//  long",
                   getLLVMStyleWithColumns(20)));

  // Don't break or reflow after implicit string literals.
  verifyFormat("#include <t> // l l l\n"
               "             // l",
               getLLVMStyleWithColumns(20));

  // Don't break or reflow comments on import lines.
  EXPECT_EQ("#include \"t\" /* l l l\n"
            "                * l */",
            format("#include \"t\" /* l l l\n"
                   "                * l */",
                   getLLVMStyleWithColumns(20)));

  // Don't reflow between different trailing comment sections.
  EXPECT_EQ("int i; // long long\n"
            "       // long\n"
            "int j; // long long\n"
            "       // long\n",
            format("int i; // long long long\n"
                   "int j; // long long long\n",
                   getLLVMStyleWithColumns(20)));

  // Don't reflow if the first word on the next line is longer than the
  // available space at current line.
  EXPECT_EQ("int i; // trigger\n"
            "       // reflow\n"
            "       // longsec\n",
            format("int i; // trigger reflow\n"
                   "       // longsec\n",
                   getLLVMStyleWithColumns(20)));

  // Keep empty comment lines.
  EXPECT_EQ("/**/", format(" /**/", getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/* */", format(" /* */", getLLVMStyleWithColumns(20)));
  EXPECT_EQ("/*  */", format(" /*  */", getLLVMStyleWithColumns(20)));
  EXPECT_EQ("//", format(" //  ", getLLVMStyleWithColumns(20)));
  EXPECT_EQ("///", format(" ///  ", getLLVMStyleWithColumns(20)));
}

TEST_F(FormatTest, IgnoresIf0Contents) {
  EXPECT_EQ("#if 0\n"
            "}{)(&*(^%%#%@! fsadj f;ldjs ,:;| <<<>>>][)(][\n"
            "#endif\n"
            "void f() {}",
            format("#if 0\n"
                   "}{)(&*(^%%#%@! fsadj f;ldjs ,:;| <<<>>>][)(][\n"
                   "#endif\n"
                   "void f(  ) {  }"));
  EXPECT_EQ("#if false\n"
            "void f(  ) {  }\n"
            "#endif\n"
            "void g() {}\n",
            format("#if false\n"
                   "void f(  ) {  }\n"
                   "#endif\n"
                   "void g(  ) {  }\n"));
  EXPECT_EQ("enum E {\n"
            "  One,\n"
            "  Two,\n"
            "#if 0\n"
            "Three,\n"
            "      Four,\n"
            "#endif\n"
            "  Five\n"
            "};",
            format("enum E {\n"
                   "  One,Two,\n"
                   "#if 0\n"
                   "Three,\n"
                   "      Four,\n"
                   "#endif\n"
                   "  Five};"));
  EXPECT_EQ("enum F {\n"
            "  One,\n"
            "#if 1\n"
            "  Two,\n"
            "#if 0\n"
            "Three,\n"
            "      Four,\n"
            "#endif\n"
            "  Five\n"
            "#endif\n"
            "};",
            format("enum F {\n"
                   "One,\n"
                   "#if 1\n"
                   "Two,\n"
                   "#if 0\n"
                   "Three,\n"
                   "      Four,\n"
                   "#endif\n"
                   "Five\n"
                   "#endif\n"
                   "};"));
  EXPECT_EQ("enum G {\n"
            "  One,\n"
            "#if 0\n"
            "Two,\n"
            "#else\n"
            "  Three,\n"
            "#endif\n"
            "  Four\n"
            "};",
            format("enum G {\n"
                   "One,\n"
                   "#if 0\n"
                   "Two,\n"
                   "#else\n"
                   "Three,\n"
                   "#endif\n"
                   "Four\n"
                   "};"));
  EXPECT_EQ("enum H {\n"
            "  One,\n"
            "#if 0\n"
            "#ifdef Q\n"
            "Two,\n"
            "#else\n"
            "Three,\n"
            "#endif\n"
            "#endif\n"
            "  Four\n"
            "};",
            format("enum H {\n"
                   "One,\n"
                   "#if 0\n"
                   "#ifdef Q\n"
                   "Two,\n"
                   "#else\n"
                   "Three,\n"
                   "#endif\n"
                   "#endif\n"
                   "Four\n"
                   "};"));
  EXPECT_EQ("enum I {\n"
            "  One,\n"
            "#if /* test */ 0 || 1\n"
            "Two,\n"
            "Three,\n"
            "#endif\n"
            "  Four\n"
            "};",
            format("enum I {\n"
                   "One,\n"
                   "#if /* test */ 0 || 1\n"
                   "Two,\n"
                   "Three,\n"
                   "#endif\n"
                   "Four\n"
                   "};"));
  EXPECT_EQ("enum J {\n"
            "  One,\n"
            "#if 0\n"
            "#if 0\n"
            "Two,\n"
            "#else\n"
            "Three,\n"
            "#endif\n"
            "Four,\n"
            "#endif\n"
            "  Five\n"
            "};",
            format("enum J {\n"
                   "One,\n"
                   "#if 0\n"
                   "#if 0\n"
                   "Two,\n"
                   "#else\n"
                   "Three,\n"
                   "#endif\n"
                   "Four,\n"
                   "#endif\n"
                   "Five\n"
                   "};"));
}

//===----------------------------------------------------------------------===//
// Tests for classes, namespaces, etc.
//===----------------------------------------------------------------------===//

TEST_F(FormatTest, DoesNotBreakSemiAfterClassDecl) {
  verifyFormat("class A {};");
}

TEST_F(FormatTest, UnderstandsAccessSpecifiers) {
  verifyFormat("class A {\n"
               "public:\n"
               "public: // comment\n"
               "protected:\n"
               "private:\n"
               "  void f() {}\n"
               "};");
  verifyGoogleFormat("class A {\n"
                     " public:\n"
                     " protected:\n"
                     " private:\n"
                     "  void f() {}\n"
                     "};");
  verifyFormat("class A {\n"
               "public slots:\n"
               "  void f1() {}\n"
               "public Q_SLOTS:\n"
               "  void f2() {}\n"
               "protected slots:\n"
               "  void f3() {}\n"
               "protected Q_SLOTS:\n"
               "  void f4() {}\n"
               "private slots:\n"
               "  void f5() {}\n"
               "private Q_SLOTS:\n"
               "  void f6() {}\n"
               "signals:\n"
               "  void g1();\n"
               "Q_SIGNALS:\n"
               "  void g2();\n"
               "};");

  // Don't interpret 'signals' the wrong way.
  verifyFormat("signals.set();");
  verifyFormat("for (Signals signals : f()) {\n}");
  verifyFormat("{\n"
               "  signals.set(); // This needs indentation.\n"
               "}");
  verifyFormat("void f() {\n"
               "label:\n"
               "  signals.baz();\n"
               "}");
}

TEST_F(FormatTest, SeparatesLogicalBlocks) {
  EXPECT_EQ("class A {\n"
            "public:\n"
            "  void f();\n"
            "\n"
            "private:\n"
            "  void g() {}\n"
            "  // test\n"
            "protected:\n"
            "  int h;\n"
            "};",
            format("class A {\n"
                   "public:\n"
                   "void f();\n"
                   "private:\n"
                   "void g() {}\n"
                   "// test\n"
                   "protected:\n"
                   "int h;\n"
                   "};"));
  EXPECT_EQ("class A {\n"
            "protected:\n"
            "public:\n"
            "  void f();\n"
            "};",
            format("class A {\n"
                   "protected:\n"
                   "\n"
                   "public:\n"
                   "\n"
                   "  void f();\n"
                   "};"));

  // Even ensure proper spacing inside macros.
  EXPECT_EQ("#define B     \\\n"
            "  class A {   \\\n"
            "   protected: \\\n"
            "   public:    \\\n"
            "    void f(); \\\n"
            "  };",
            format("#define B     \\\n"
                   "  class A {   \\\n"
                   "   protected: \\\n"
                   "              \\\n"
                   "   public:    \\\n"
                   "              \\\n"
                   "    void f(); \\\n"
                   "  };",
                   getGoogleStyle()));
  // But don't remove empty lines after macros ending in access specifiers.
  EXPECT_EQ("#define A private:\n"
            "\n"
            "int i;",
            format("#define A         private:\n"
                   "\n"
                   "int              i;"));
}

TEST_F(FormatTest, FormatsClasses) {
  verifyFormat("class A : public B {};");
  verifyFormat("class A : public ::B {};");

  verifyFormat(
      "class AAAAAAAAAAAAAAAAAAAA : public BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB,\n"
      "                             public CCCCCCCCCCCCCCCCCCCCCCCCCCCCCC {};");
  verifyFormat("class AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA\n"
               "    : public BBBBBBBBBBBBBBBBBBBBBBBBBBBBBB,\n"
               "      public CCCCCCCCCCCCCCCCCCCCCCCCCCCCCC {};");
  verifyFormat(
      "class A : public B, public C, public D, public E, public F {};");
  verifyFormat("class AAAAAAAAAAAA : public B,\n"
               "                     public C,\n"
               "                     public D,\n"
               "                     public E,\n"
               "                     public F,\n"
               "                     public G {};");

  verifyFormat("class\n"
               "    ReallyReallyLongClassName {\n"
               "  int i;\n"
               "};",
               getLLVMStyleWithColumns(32));
  verifyFormat("struct aaaaaaaaaaaaa : public aaaaaaaaaaaaaaaaaaa< // break\n"
               "                           aaaaaaaaaaaaaaaa> {};");
  verifyFormat("struct aaaaaaaaaaaaaaaaaaaa\n"
               "    : public aaaaaaaaaaaaaaaaaaa<aaaaaaaaaaaaaaaaaaaaa,\n"
               "                                 aaaaaaaaaaaaaaaaaaaaaa> {};");
  verifyFormat("template <class R, class C>\n"
               "struct Aaaaaaaaaaaaaaaaa<R (C::*)(int) const>\n"
               "    : Aaaaaaaaaaaaaaaaa<R (C::*)(int)> {};");
  verifyFormat("class ::A::B {};");
}

TEST_F(FormatTest, FormatsVariableDeclarationsAfterStructOrClass) {
  verifyFormat("class A {\n} a, b;");
  verifyFormat("struct A {\n} a, b;");
  verifyFormat("union A {\n} a;");
}

TEST_F(FormatTest, FormatsEnum) {
  verifyFormat("enum {\n"
               "  Zero,\n"
               "  One = 1,\n"
               "  Two = One + 1,\n"
               "  Three = (One + Two),\n"
               "  Four = (Zero && (One ^ Two)) | (One << Two),\n"
               "  Five = (One, Two, Three, Four, 5)\n"
               "};");
  verifyGoogleFormat("enum {\n"
                     "  Zero,\n"
                     "  One = 1,\n"
                     "  Two = One + 1,\n"
                     "  Three = (One + Two),\n"
                     "  Four = (Zero && (One ^ Two)) | (One << Two),\n"
                     "  Five = (One, Two, Three, Four, 5)\n"
                     "};");
  verifyFormat("enum Enum {};");
  verifyFormat("enum {};");
  verifyFormat("enum X E {} d;");
  verifyFormat("enum __attribute__((...)) E {} d;");
  verifyFormat("enum __declspec__((...)) E {} d;");
  verifyFormat("enum {\n"
               "  Bar = Foo<int, int>::value\n"
               "};",
               getLLVMStyleWithColumns(30));

  verifyFormat("enum ShortEnum { A, B, C };");
  verifyGoogleFormat("enum ShortEnum { A, B, C };");

  EXPECT_EQ("enum KeepEmptyLines {\n"
            "  ONE,\n"
            "\n"
            "  TWO,\n"
            "\n"
            "  THREE\n"
            "}",
            format("enum KeepEmptyLines {\n"
                   "  ONE,\n"
                   "\n"
                   "  TWO,\n"
                   "\n"
                   "\n"
                   "  THREE\n"
                   "}"));
  verifyFormat("enum E { // comment\n"
               "  ONE,\n"
               "  TWO\n"
               "};\n"
               "int i;");
  // Not enums.
  verifyFormat("enum X f() {\n"
               "  a();\n"
               "  return 42;\n"
               "}");
  verifyFormat("enum X Type::f() {\n"
               "  a();\n"
               "  return 42;\n"
               "}");
  verifyFormat("enum ::X f() {\n"
               "  a();\n"
               "  return 42;\n"
               "}");
  verifyFormat("enum ns::X f() {\n"
               "  a();\n"
               "  return 42;\n"
               "}");
}

TEST_F(FormatTest, FormatsEnumsWithErrors) {
  verifyFormat("enum Type {\n"
               "  One = 0; // These semicolons should be commas.\n"
               "  Two = 1;\n"
               "};");
  verifyFormat("namespace n {\n"
               "enum Type {\n"
               "  One,\n"
               "  Two, // missing };\n"
               "  int i;\n"
               "}\n"
               "void g() {}");
}

TEST_F(FormatTest, FormatsEnumStruct) {
  verifyFormat("enum struct {\n"
               "  Zero,\n"
               "  One = 1,\n"
               "  Two = One + 1,\n"
               "  Three = (One + Two),\n"
               "  Four = (Zero && (One ^ Two)) | (One << Two),\n"
               "  Five = (One, Two, Three, Four, 5)\n"
               "};");
  verifyFormat("enum struct Enum {};");
  verifyFormat("enum struct {};");
  verifyFormat("enum struct X E {} d;");
  verifyFormat("enum struct __attribute__((...)) E {} d;");
  verifyFormat("enum struct __declspec__((...)) E {} d;");
  verifyFormat("enum struct X f() {\n  a();\n  return 42;\n}");
}

TEST_F(FormatTest, FormatsEnumClass) {
  verifyFormat("enum class {\n"
               "  Zero,\n"
               "  One = 1,\n"
               "  Two = One + 1,\n"
               "  Three = (One + Two),\n"
               "  Four = (Zero && (One ^ Two)) | (One << Two),\n"
               "  Five = (One, Two, Three, Four, 5)\n"
               "};");
  verifyFormat("enum class Enum {};");
  verifyFormat("enum class {};");
  verifyFormat("enum class X E {} d;");
  verifyFormat("enum class __attribute__((...)) E {} d;");
  verifyFormat("enum class __declspec__((...)) E {} d;");
  verifyFormat("enum class X f() {\n  a();\n  return 42;\n}");
}

TEST_F(FormatTest, FormatsEnumTypes) {
  verifyFormat("enum X : int {\n"
               "  A, // Force multiple lines.\n"
               "  B\n"
               "};");
  verifyFormat("enum X : int { A, B };");
  verifyFormat("enum X : std::uint32_t { A, B };");
}

TEST_F(FormatTest, FormatsNSEnums) {
  verifyGoogleFormat("typedef NS_ENUM(NSInteger, SomeName) { AAA, BBB }");
  verifyGoogleFormat("typedef NS_ENUM(NSInteger, MyType) {\n"
                     "  // Information about someDecentlyLongValue.\n"
                     "  someDecentlyLongValue,\n"
                     "  // Information about anotherDecentlyLongValue.\n"
                     "  anotherDecentlyLongValue,\n"
                     "  // Information about aThirdDecentlyLongValue.\n"
                     "  aThirdDecentlyLongValue\n"
                     "};");
  verifyGoogleFormat("typedef NS_OPTIONS(NSInteger, MyType) {\n"
                     "  a = 1,\n"
                     "  b = 2,\n"
                     "  c = 3,\n"
                     "};");
  verifyGoogleFormat("typedef CF_ENUM(NSInteger, MyType) {\n"
                     "  a = 1,\n"
                     "  b = 2,\n"
                     "  c = 3,\n"
                     "};");
  verifyGoogleFormat("typedef CF_OPTIONS(NSInteger, MyType) {\n"
                     "  a = 1,\n"
                     "  b = 2,\n"
                     "  c = 3,\n"
                     "};");
}

TEST_F(FormatTest, FormatsBitfields) {
  verifyFormat("struct Bitfields {\n"
               "  unsigned sClass : 8;\n"
               "  unsigned ValueKind : 2;\n"
               "};");
  verifyFormat("struct A {\n"
               "  int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa : 1,\n"
               "      bbbbbbbbbbbbbbbbbbbbbbbbb;\n"
               "};");
  verifyFormat("struct MyStruct {\n"
               "  uchar data;\n"
               "  uchar : 8;\n"
               "  uchar : 8;\n"
               "  uchar other;\n"
               "};");
}

TEST_F(FormatTest, FormatsNamespaces) {
  verifyFormat("namespace some_namespace {\n"
               "class A {};\n"
               "void f() { f(); }\n"
               "}");
  verifyFormat("namespace {\n"
               "class A {};\n"
               "void f() { f(); }\n"
               "}");
  verifyFormat("inline namespace X {\n"
               "class A {};\n"
               "void f() { f(); }\n"
               "}");
  verifyFormat("using namespace some_namespace;\n"
               "class A {};\n"
               "void f() { f(); }");

  // This code is more common than we thought; if we
  // layout this correctly the semicolon will go into
  // its own line, which is undesirable.
  verifyFormat("namespace {};");
  verifyFormat("namespace {\n"
               "class A {};\n"
               "};");

  verifyFormat("namespace {\n"
               "int SomeVariable = 0; // comment\n"
               "} // namespace");
  EXPECT_EQ("#ifndef HEADER_GUARD\n"
            "#define HEADER_GUARD\n"
            "namespace my_namespace {\n"
            "int i;\n"
            "} // my_namespace\n"
            "#endif // HEADER_GUARD",
            format("#ifndef HEADER_GUARD\n"
                   " #define HEADER_GUARD\n"
                   "   namespace my_namespace {\n"
                   "int i;\n"
                   "}    // my_namespace\n"
                   "#endif    // HEADER_GUARD"));

  EXPECT_EQ("namespace A::B {\n"
            "class C {};\n"
            "}",
            format("namespace A::B {\n"
                   "class C {};\n"
                   "}"));

  FormatStyle Style = getLLVMStyle();
  Style.NamespaceIndentation = FormatStyle::NI_All;
  EXPECT_EQ("namespace out {\n"
            "  int i;\n"
            "  namespace in {\n"
            "    int i;\n"
            "  } // namespace\n"
            "} // namespace",
            format("namespace out {\n"
                   "int i;\n"
                   "namespace in {\n"
                   "int i;\n"
                   "} // namespace\n"
                   "} // namespace",
                   Style));

  Style.NamespaceIndentation = FormatStyle::NI_Inner;
  EXPECT_EQ("namespace out {\n"
            "int i;\n"
            "namespace in {\n"
            "  int i;\n"
            "} // namespace\n"
            "} // namespace",
            format("namespace out {\n"
                   "int i;\n"
                   "namespace in {\n"
                   "int i;\n"
                   "} // namespace\n"
                   "} // namespace",
                   Style));
}

TEST_F(FormatTest, FormatsExternC) { verifyFormat("extern \"C\" {\nint a;"); }

TEST_F(FormatTest, FormatsInlineASM) {
  verifyFormat("asm(\"xyz\" : \"=a\"(a), \"=d\"(b) : \"a\"(data));");
  verifyFormat("asm(\"nop\" ::: \"memory\");");
  verifyFormat(
      "asm(\"movq\\t%%rbx, %%rsi\\n\\t\"\n"
      "    \"cpuid\\n\\t\"\n"
      "    \"xchgq\\t%%rbx, %%rsi\\n\\t\"\n"
      "    : \"=a\"(*rEAX), \"=S\"(*rEBX), \"=c\"(*rECX), \"=d\"(*rEDX)\n"
      "    : \"a\"(value));");
  EXPECT_EQ(
      "void NS_InvokeByIndex(void *that, unsigned int methodIndex) {\n"
      "  __asm {\n"
      "        mov     edx,[that] // vtable in edx\n"
      "        mov     eax,methodIndex\n"
      "        call    [edx][eax*4] // stdcall\n"
      "  }\n"
      "}",
      format("void NS_InvokeByIndex(void *that,   unsigned int methodIndex) {\n"
             "    __asm {\n"
             "        mov     edx,[that] // vtable in edx\n"
             "        mov     eax,methodIndex\n"
             "        call    [edx][eax*4] // stdcall\n"
             "    }\n"
             "}"));
  EXPECT_EQ("_asm {\n"
            "  xor eax, eax;\n"
            "  cpuid;\n"
            "}",
            format("_asm {\n"
                   "  xor eax, eax;\n"
                   "  cpuid;\n"
                   "}"));
  verifyFormat("void function() {\n"
               "  // comment\n"
               "  asm(\"\");\n"
               "}");
  EXPECT_EQ("__asm {\n"
            "}\n"
            "int i;",
            format("__asm   {\n"
                   "}\n"
                   "int   i;"));
}

TEST_F(FormatTest, FormatTryCatch) {
  verifyFormat("try {\n"
               "  throw a * b;\n"
               "} catch (int a) {\n"
               "  // Do nothing.\n"
               "} catch (...) {\n"
               "  exit(42);\n"
               "}");

  // Function-level try statements.
  verifyFormat("int f() try { return 4; } catch (...) {\n"
               "  return 5;\n"
               "}");
  verifyFormat("class A {\n"
               "  int a;\n"
               "  A() try : a(0) {\n"
               "  } catch (...) {\n"
               "    throw;\n"
               "  }\n"
               "};\n");

  // Incomplete try-catch blocks.
  verifyIncompleteFormat("try {} catch (");
}

TEST_F(FormatTest, FormatSEHTryCatch) {
  verifyFormat("__try {\n"
               "  int a = b * c;\n"
               "} __except (EXCEPTION_EXECUTE_HANDLER) {\n"
               "  // Do nothing.\n"
               "}");

  verifyFormat("__try {\n"
               "  int a = b * c;\n"
               "} __finally {\n"
               "  // Do nothing.\n"
               "}");

  verifyFormat("DEBUG({\n"
               "  __try {\n"
               "  } __finally {\n"
               "  }\n"
               "});\n");
}

TEST_F(FormatTest, IncompleteTryCatchBlocks) {
  verifyFormat("try {\n"
               "  f();\n"
               "} catch {\n"
               "  g();\n"
               "}");
  verifyFormat("try {\n"
               "  f();\n"
               "} catch (A a) MACRO(x) {\n"
               "  g();\n"
               "} catch (B b) MACRO(x) {\n"
               "  g();\n"
               "}");
}

TEST_F(FormatTest, FormatTryCatchBraceStyles) {
  FormatStyle Style = getLLVMStyle();
  for (auto BraceStyle : {FormatStyle::BS_Attach, FormatStyle::BS_Mozilla,
                          FormatStyle::BS_WebKit}) {
    Style.BreakBeforeBraces = BraceStyle;
    verifyFormat("try {\n"
                 "  // something\n"
                 "} catch (...) {\n"
                 "  // something\n"
                 "}",
                 Style);
  }
  Style.BreakBeforeBraces = FormatStyle::BS_Stroustrup;
  verifyFormat("try {\n"
               "  // something\n"
               "}\n"
               "catch (...) {\n"
               "  // something\n"
               "}",
               Style);
  verifyFormat("__try {\n"
               "  // something\n"
               "}\n"
               "__finally {\n"
               "  // something\n"
               "}",
               Style);
  verifyFormat("@try {\n"
               "  // something\n"
               "}\n"
               "@finally {\n"
               "  // something\n"
               "}",
               Style);
  Style.BreakBeforeBraces = FormatStyle::BS_Allman;
  verifyFormat("try\n"
               "{\n"
               "  // something\n"
               "}\n"
               "catch (...)\n"
               "{\n"
               "  // something\n"
               "}",
               Style);
  Style.BreakBeforeBraces = FormatStyle::BS_GNU;
  verifyFormat("try\n"
               "  {\n"
               "    // something\n"
               "  }\n"
               "catch (...)\n"
               "  {\n"
               "    // something\n"
               "  }",
               Style);
  Style.BreakBeforeBraces = FormatStyle::BS_Custom;
  Style.BraceWrapping.BeforeCatch = true;
  verifyFormat("try {\n"
               "  // something\n"
               "}\n"
               "catch (...) {\n"
               "  // something\n"
               "}",
               Style);
}

TEST_F(FormatTest, StaticInitializers) {
  verifyFormat("static SomeClass SC = {1, 'a'};");

  verifyFormat("static SomeClass WithALoooooooooooooooooooongName = {\n"
               "    100000000, "
               "\"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"};");

  // Here, everything other than the "}" would fit on a line.
  verifyFormat("static int LooooooooooooooooooooooooongVariable[1] = {\n"
               "    10000000000000000000000000};");
  EXPECT_EQ("S s = {a,\n"
            "\n"
            "       b};",
            format("S s = {\n"
                   "  a,\n"
                   "\n"
                   "  b\n"
                   "};"));

  // FIXME: This would fit into the column limit if we'd fit "{ {" on the first
  // line. However, the formatting looks a bit off and this probably doesn't
  // happen often in practice.
  verifyFormat("static int Variable[1] = {\n"
               "    {1000000000000000000000000000000000000}};",
               getLLVMStyleWithColumns(40));
}

TEST_F(FormatTest, DesignatedInitializers) {
  verifyFormat("const struct A a = {.a = 1, .b = 2};");
  verifyFormat("const struct A a = {.aaaaaaaaaa = 1,\n"
               "                    .bbbbbbbbbb = 2,\n"
               "                    .cccccccccc = 3,\n"
               "                    .dddddddddd = 4,\n"
               "                    .eeeeeeeeee = 5};");
  verifyFormat("const struct Aaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaa = {\n"
               "    .aaaaaaaaaaaaaaaaaaaaaaaaaaa = 1,\n"
               "    .bbbbbbbbbbbbbbbbbbbbbbbbbbb = 2,\n"
               "    .ccccccccccccccccccccccccccc = 3,\n"
               "    .ddddddddddddddddddddddddddd = 4,\n"
               "    .eeeeeeeeeeeeeeeeeeeeeeeeeee = 5};");

  verifyGoogleFormat("const struct A a = {.a = 1, .b = 2};");
}

TEST_F(FormatTest, NestedStaticInitializers) {
  verifyFormat("static A x = {{{}}};\n");
  verifyFormat("static A x = {{{init1, init2, init3, init4},\n"
               "               {init1, init2, init3, init4}}};",
               getLLVMStyleWithColumns(50));

  verifyFormat("somes Status::global_reps[3] = {\n"
               "    {kGlobalRef, OK_CODE, NULL, NULL, NULL},\n"
               "    {kGlobalRef, CANCELLED_CODE, NULL, NULL, NULL},\n"
               "    {kGlobalRef, UNKNOWN_CODE, NULL, NULL, NULL}};",
               getLLVMStyleWithColumns(60));
  verifyGoogleFormat("SomeType Status::global_reps[3] = {\n"
                     "    {kGlobalRef, OK_CODE, NULL, NULL, NULL},\n"
                     "    {kGlobalRef, CANCELLED_CODE, NULL, NULL, NULL},\n"
                     "    {kGlobalRef, UNKNOWN_CODE, NULL, NULL, NULL}};");
  verifyFormat("CGRect cg_rect = {{rect.fLeft, rect.fTop},\n"
               "                  {rect.fRight - rect.fLeft, rect.fBottom - "
               "rect.fTop}};");

  verifyFormat(
      "SomeArrayOfSomeType a = {\n"
      "    {{1, 2, 3},\n"
      "     {1, 2, 3},\n"
      "     {111111111111111111111111111111, 222222222222222222222222222222,\n"
      "      333333333333333333333333333333},\n"
      "     {1, 2, 3},\n"
      "     {1, 2, 3}}};");
  verifyFormat(
      "SomeArrayOfSomeType a = {\n"
      "    {{1, 2, 3}},\n"
      "    {{1, 2, 3}},\n"
      "    {{111111111111111111111111111111, 222222222222222222222222222222,\n"
      "      333333333333333333333333333333}},\n"
      "    {{1, 2, 3}},\n"
      "    {{1, 2, 3}}};");

  verifyFormat("struct {\n"
               "  unsigned bit;\n"
               "  const char *const name;\n"
               "} kBitsToOs[] = {{kOsMac, \"Mac\"},\n"
               "                 {kOsWin, \"Windows\"},\n"
               "                 {kOsLinux, \"Linux\"},\n"
               "                 {kOsCrOS, \"Chrome OS\"}};");
  verifyFormat("struct {\n"
               "  unsigned bit;\n"
               "  const char *const name;\n"
               "} kBitsToOs[] = {\n"
               "    {kOsMac, \"Mac\"},\n"
               "    {kOsWin, \"Windows\"},\n"
               "    {kOsLinux, \"Linux\"},\n"
               "    {kOsCrOS, \"Chrome OS\"},\n"
               "};");
}

TEST_F(FormatTest, FormatsSmallMacroDefinitionsInSingleLine) {
  verifyFormat("#define ALooooooooooooooooooooooooooooooooooooooongMacro("
               "                      \\\n"
               "    aLoooooooooooooooooooooooongFuuuuuuuuuuuuuunctiooooooooo)");
}

TEST_F(FormatTest, DoesNotBreakPureVirtualFunctionDefinition) {
  verifyFormat("virtual void write(ELFWriter *writerrr,\n"
               "                   OwningPtr<FileOutputBuffer> &buffer) = 0;");

  // Do break defaulted and deleted functions.
  verifyFormat("virtual void ~Deeeeeeeestructor() =\n"
               "    default;",
               getLLVMStyleWithColumns(40));
  verifyFormat("virtual void ~Deeeeeeeestructor() =\n"
               "    delete;",
               getLLVMStyleWithColumns(40));
}

TEST_F(FormatTest, BreaksStringLiteralsOnlyInDefine) {
  verifyFormat("# 1111 \"/aaaaaaaaa/aaaaaaaaaaaaaaaaaaa/aaaaaaaa.cpp\" 2 3",
               getLLVMStyleWithColumns(40));
  verifyFormat("#line 11111 \"/aaaaaaaaa/aaaaaaaaaaaaaaaaaaa/aaaaaaaa.cpp\"",
               getLLVMStyleWithColumns(40));
  EXPECT_EQ("#define Q                              \\\n"
            "  \"/aaaaaaaaa/aaaaaaaaaaaaaaaaaaa/\"    \\\n"
            "  \"aaaaaaaa.cpp\"",
            format("#define Q \"/aaaaaaaaa/aaaaaaaaaaaaaaaaaaa/aaaaaaaa.cpp\"",
                   getLLVMStyleWithColumns(40)));
}

TEST_F(FormatTest, UnderstandsLinePPDirective) {
  EXPECT_EQ("# 123 \"A string literal\"",
            format("   #     123    \"A string literal\""));
}

TEST_F(FormatTest, LayoutUnknownPPDirective) {
  EXPECT_EQ("#;", format("#;"));
  verifyFormat("#\n;\n;\n;");
}

TEST_F(FormatTest, UnescapedEndOfLineEndsPPDirective) {
  EXPECT_EQ("#line 42 \"test\"\n",
            format("#  \\\n  line  \\\n  42  \\\n  \"test\"\n"));
  EXPECT_EQ("#define A B\n", format("#  \\\n define  \\\n    A  \\\n       B\n",
                                    getLLVMStyleWithColumns(12)));
}

TEST_F(FormatTest, EndOfFileEndsPPDirective) {
  EXPECT_EQ("#line 42 \"test\"",
            format("#  \\\n  line  \\\n  42  \\\n  \"test\""));
  EXPECT_EQ("#define A B", format("#  \\\n define  \\\n    A  \\\n       B"));
}

TEST_F(FormatTest, DoesntRemoveUnknownTokens) {
  verifyFormat("#define A \\x20");
  verifyFormat("#define A \\ x20");
  EXPECT_EQ("#define A \\ x20", format("#define A \\   x20"));
  verifyFormat("#define A ''");
  verifyFormat("#define A ''qqq");
  verifyFormat("#define A `qqq");
  verifyFormat("f(\"aaaa, bbbb, \"\\\"ccccc\\\"\");");
  EXPECT_EQ("const char *c = STRINGIFY(\n"
            "\\na : b);",
            format("const char * c = STRINGIFY(\n"
                   "\\na : b);"));

  verifyFormat("a\r\\");
  verifyFormat("a\v\\");
  verifyFormat("a\f\\");
}

TEST_F(FormatTest, IndentsPPDirectiveInReducedSpace) {
  verifyFormat("#define A(BB)", getLLVMStyleWithColumns(13));
  verifyFormat("#define A( \\\n    BB)", getLLVMStyleWithColumns(12));
  verifyFormat("#define A( \\\n    A, B)", getLLVMStyleWithColumns(12));
  // FIXME: We never break before the macro name.
  verifyFormat("#define AA( \\\n    B)", getLLVMStyleWithColumns(12));

  verifyFormat("#define A A\n#define A A");
  verifyFormat("#define A(X) A\n#define A A");

  verifyFormat("#define Something Other", getLLVMStyleWithColumns(23));
  verifyFormat("#define Something    \\\n  Other", getLLVMStyleWithColumns(22));
}

TEST_F(FormatTest, HandlePreprocessorDirectiveContext) {
  EXPECT_EQ("// somecomment\n"
            "#include \"a.h\"\n"
            "#define A(  \\\n"
            "    A, B)\n"
            "#include \"b.h\"\n"
            "// somecomment\n",
            format("  // somecomment\n"
                   "  #include \"a.h\"\n"
                   "#define A(A,\\\n"
                   "    B)\n"
                   "    #include \"b.h\"\n"
                   " // somecomment\n",
                   getLLVMStyleWithColumns(13)));
}

TEST_F(FormatTest, LayoutSingleHash) { EXPECT_EQ("#\na;", format("#\na;")); }

TEST_F(FormatTest, LayoutCodeInMacroDefinitions) {
  EXPECT_EQ("#define A    \\\n"
            "  c;         \\\n"
            "  e;\n"
            "f;",
            format("#define A c; e;\n"
                   "f;",
                   getLLVMStyleWithColumns(14)));
}

TEST_F(FormatTest, LayoutRemainingTokens) { EXPECT_EQ("{}", format("{}")); }

TEST_F(FormatTest, MacroDefinitionInsideStatement) {
  EXPECT_EQ("int x,\n"
            "#define A\n"
            "    y;",
            format("int x,\n#define A\ny;"));
}

TEST_F(FormatTest, HashInMacroDefinition) {
  EXPECT_EQ("#define A(c) L#c", format("#define A(c) L#c", getLLVMStyle()));
  verifyFormat("#define A \\\n  b #c;", getLLVMStyleWithColumns(11));
  verifyFormat("#define A  \\\n"
               "  {        \\\n"
               "    f(#c); \\\n"
               "  }",
               getLLVMStyleWithColumns(11));

  verifyFormat("#define A(X)         \\\n"
               "  void function##X()",
               getLLVMStyleWithColumns(22));

  verifyFormat("#define A(a, b, c)   \\\n"
               "  void a##b##c()",
               getLLVMStyleWithColumns(22));

  verifyFormat("#define A void # ## #", getLLVMStyleWithColumns(22));
}

TEST_F(FormatTest, RespectWhitespaceInMacroDefinitions) {
  EXPECT_EQ("#define A (x)", format("#define A (x)"));
  EXPECT_EQ("#define A(x)", format("#define A(x)"));
}

TEST_F(FormatTest, EmptyLinesInMacroDefinitions) {
  EXPECT_EQ("#define A b;", format("#define A \\\n"
                                   "          \\\n"
                                   "  b;",
                                   getLLVMStyleWithColumns(25)));
  EXPECT_EQ("#define A \\\n"
            "          \\\n"
            "  a;      \\\n"
            "  b;",
            format("#define A \\\n"
                   "          \\\n"
                   "  a;      \\\n"
                   "  b;",
                   getLLVMStyleWithColumns(11)));
  EXPECT_EQ("#define A \\\n"
            "  a;      \\\n"
            "          \\\n"
            "  b;",
            format("#define A \\\n"
                   "  a;      \\\n"
                   "          \\\n"
                   "  b;",
                   getLLVMStyleWithColumns(11)));
}

TEST_F(FormatTest, MacroDefinitionsWithIncompleteCode) {
  verifyIncompleteFormat("#define A :");
  verifyFormat("#define SOMECASES  \\\n"
               "  case 1:          \\\n"
               "  case 2\n",
               getLLVMStyleWithColumns(20));
  verifyFormat("#define MACRO(a) \\\n"
               "  if (a)         \\\n"
               "    f();         \\\n"
               "  else           \\\n"
               "    g()",
               getLLVMStyleWithColumns(18));
  verifyFormat("#define A template <typename T>");
  verifyIncompleteFormat("#define STR(x) #x\n"
                         "f(STR(this_is_a_string_literal{));");
  verifyFormat("#pragma omp threadprivate( \\\n"
               "    y)), // expected-warning",
               getLLVMStyleWithColumns(28));
  verifyFormat("#d, = };");
  verifyFormat("#if \"a");
  verifyIncompleteFormat("({\n"
                         "#define b     \\\n"
                         "  }           \\\n"
                         "  a\n"
                         "a",
                         getLLVMStyleWithColumns(15));
  verifyFormat("#define A     \\\n"
               "  {           \\\n"
               "    {\n"
               "#define B     \\\n"
               "  }           \\\n"
               "  }",
               getLLVMStyleWithColumns(15));
  verifyNoCrash("#if a\na(\n#else\n#endif\n{a");
  verifyNoCrash("a={0,1\n#if a\n#else\n;\n#endif\n}");
  verifyNoCrash("#if a\na(\n#else\n#endif\n) a {a,b,c,d,f,g};");
  verifyNoCrash("#ifdef A\n a(\n #else\n #endif\n) = []() {      \n)}");
}

TEST_F(FormatTest, MacrosWithoutTrailingSemicolon) {
  verifyFormat("SOME_TYPE_NAME abc;"); // Gated on the newline.
  EXPECT_EQ("class A : public QObject {\n"
            "  Q_OBJECT\n"
            "\n"
            "  A() {}\n"
            "};",
            format("class A  :  public QObject {\n"
                   "     Q_OBJECT\n"
                   "\n"
                   "  A() {\n}\n"
                   "}  ;"));
  EXPECT_EQ("MACRO\n"
            "/*static*/ int i;",
            format("MACRO\n"
                   " /*static*/ int   i;"));
  EXPECT_EQ("SOME_MACRO\n"
            "namespace {\n"
            "void f();\n"
            "}",
            format("SOME_MACRO\n"
                   "  namespace    {\n"
                   "void   f(  );\n"
                   "}"));
  // Only if the identifier contains at least 5 characters.
  EXPECT_EQ("HTTP f();", format("HTTP\nf();"));
  EXPECT_EQ("MACRO\nf();", format("MACRO\nf();"));
  // Only if everything is upper case.
  EXPECT_EQ("class A : public QObject {\n"
            "  Q_Object A() {}\n"
            "};",
            format("class A  :  public QObject {\n"
                   "     Q_Object\n"
                   "  A() {\n}\n"
                   "}  ;"));

  // Only if the next line can actually start an unwrapped line.
  EXPECT_EQ("SOME_WEIRD_LOG_MACRO << SomeThing;",
            format("SOME_WEIRD_LOG_MACRO\n"
                   "<< SomeThing;"));

  verifyFormat("VISIT_GL_CALL(GenBuffers, void, (GLsizei n, GLuint* buffers), "
               "(n, buffers))\n",
               getChromiumStyle(FormatStyle::LK_Cpp));
}

TEST_F(FormatTest, MacroCallsWithoutTrailingSemicolon) {
  EXPECT_EQ("INITIALIZE_PASS_BEGIN(ScopDetection, \"polly-detect\")\n"
            "INITIALIZE_AG_DEPENDENCY(AliasAnalysis)\n"
            "INITIALIZE_PASS_DEPENDENCY(DominatorTree)\n"
            "class X {};\n"
            "INITIALIZE_PASS_END(ScopDetection, \"polly-detect\")\n"
            "int *createScopDetectionPass() { return 0; }",
            format("  INITIALIZE_PASS_BEGIN(ScopDetection, \"polly-detect\")\n"
                   "  INITIALIZE_AG_DEPENDENCY(AliasAnalysis)\n"
                   "  INITIALIZE_PASS_DEPENDENCY(DominatorTree)\n"
                   "  class X {};\n"
                   "  INITIALIZE_PASS_END(ScopDetection, \"polly-detect\")\n"
                   "  int *createScopDetectionPass() { return 0; }"));
  // FIXME: We could probably treat IPC_BEGIN_MESSAGE_MAP/IPC_END_MESSAGE_MAP as
  // braces, so that inner block is indented one level more.
  EXPECT_EQ("int q() {\n"
            "  IPC_BEGIN_MESSAGE_MAP(WebKitTestController, message)\n"
            "  IPC_MESSAGE_HANDLER(xxx, qqq)\n"
            "  IPC_END_MESSAGE_MAP()\n"
            "}",
            format("int q() {\n"
                   "  IPC_BEGIN_MESSAGE_MAP(WebKitTestController, message)\n"
                   "    IPC_MESSAGE_HANDLER(xxx, qqq)\n"
                   "  IPC_END_MESSAGE_MAP()\n"
                   "}"));

  // Same inside macros.
  EXPECT_EQ("#define LIST(L) \\\n"
            "  L(A)          \\\n"
            "  L(B)          \\\n"
            "  L(C)",
            format("#define LIST(L) \\\n"
                   "  L(A) \\\n"
                   "  L(B) \\\n"
                   "  L(C)",
                   getGoogleStyle()));

  // These must not be recognized as macros.
  EXPECT_EQ("int q() {\n"
            "  f(x);\n"
            "  f(x) {}\n"
            "  f(x)->g();\n"
            "  f(x)->*g();\n"
            "  f(x).g();\n"
            "  f(x) = x;\n"
            "  f(x) += x;\n"
            "  f(x) -= x;\n"
            "  f(x) *= x;\n"
            "  f(x) /= x;\n"
            "  f(x) %= x;\n"
            "  f(x) &= x;\n"
            "  f(x) |= x;\n"
            "  f(x) ^= x;\n"
            "  f(x) >>= x;\n"
            "  f(x) <<= x;\n"
            "  f(x)[y].z();\n"
            "  LOG(INFO) << x;\n"
            "  ifstream(x) >> x;\n"
            "}\n",
            format("int q() {\n"
                   "  f(x)\n;\n"
                   "  f(x)\n {}\n"
                   "  f(x)\n->g();\n"
                   "  f(x)\n->*g();\n"
                   "  f(x)\n.g();\n"
                   "  f(x)\n = x;\n"
                   "  f(x)\n += x;\n"
                   "  f(x)\n -= x;\n"
                   "  f(x)\n *= x;\n"
                   "  f(x)\n /= x;\n"
                   "  f(x)\n %= x;\n"
                   "  f(x)\n &= x;\n"
                   "  f(x)\n |= x;\n"
                   "  f(x)\n ^= x;\n"
                   "  f(x)\n >>= x;\n"
                   "  f(x)\n <<= x;\n"
                   "  f(x)\n[y].z();\n"
                   "  LOG(INFO)\n << x;\n"
                   "  ifstream(x)\n >> x;\n"
                   "}\n"));
  EXPECT_EQ("int q() {\n"
            "  F(x)\n"
            "  if (1) {\n"
            "  }\n"
            "  F(x)\n"
            "  while (1) {\n"
            "  }\n"
            "  F(x)\n"
            "  G(x);\n"
            "  F(x)\n"
            "  try {\n"
            "    Q();\n"
            "  } catch (...) {\n"
            "  }\n"
            "}\n",
            format("int q() {\n"
                   "F(x)\n"
                   "if (1) {}\n"
                   "F(x)\n"
                   "while (1) {}\n"
                   "F(x)\n"
                   "G(x);\n"
                   "F(x)\n"
                   "try { Q(); } catch (...) {}\n"
                   "}\n"));
  EXPECT_EQ("class A {\n"
            "  A() : t(0) {}\n"
            "  A(int i) noexcept() : {}\n"
            "  A(X x)\n" // FIXME: function-level try blocks are broken.
            "  try : t(0) {\n"
            "  } catch (...) {\n"
            "  }\n"
            "};",
            format("class A {\n"
                   "  A()\n : t(0) {}\n"
                   "  A(int i)\n noexcept() : {}\n"
                   "  A(X x)\n"
                   "  try : t(0) {} catch (...) {}\n"
                   "};"));
  EXPECT_EQ("class SomeClass {\n"
            "public:\n"
            "  SomeClass() EXCLUSIVE_LOCK_FUNCTION(mu_);\n"
            "};",
            format("class SomeClass {\n"
                   "public:\n"
                   "  SomeClass()\n"
                   "  EXCLUSIVE_LOCK_FUNCTION(mu_);\n"
                   "};"));
  EXPECT_EQ("class SomeClass {\n"
            "public:\n"
            "  SomeClass()\n"
            "      EXCLUSIVE_LOCK_FUNCTION(mu_);\n"
            "};",
            format("class SomeClass {\n"
                   "public:\n"
                   "  SomeClass()\n"
                   "  EXCLUSIVE_LOCK_FUNCTION(mu_);\n"
                   "};",
                   getLLVMStyleWithColumns(40)));

  verifyFormat("MACRO(>)");
}

TEST_F(FormatTest, LayoutMacroDefinitionsStatementsSpanningBlocks) {
  verifyFormat("#define A \\\n"
               "  f({     \\\n"
               "    g();  \\\n"
               "  });",
               getLLVMStyleWithColumns(11));
}

TEST_F(FormatTest, IndentPreprocessorDirectivesAtZero) {
  EXPECT_EQ("{\n  {\n#define A\n  }\n}", format("{{\n#define A\n}}"));
}

TEST_F(FormatTest, FormatHashIfNotAtStartOfLine) {
  verifyFormat("{\n  { a #c; }\n}");
}

TEST_F(FormatTest, FormatUnbalancedStructuralElements) {
  EXPECT_EQ("#define A \\\n  {       \\\n    {\nint i;",
            format("#define A { {\nint i;", getLLVMStyleWithColumns(11)));
  EXPECT_EQ("#define A \\\n  }       \\\n  }\nint i;",
            format("#define A } }\nint i;", getLLVMStyleWithColumns(11)));
}

TEST_F(FormatTest, EscapedNewlines) {
  EXPECT_EQ(
      "#define A \\\n  int i;  \\\n  int j;",
      format("#define A \\\nint i;\\\n  int j;", getLLVMStyleWithColumns(11)));
  EXPECT_EQ("#define A\n\nint i;", format("#define A \\\n\n int i;"));
  EXPECT_EQ("template <class T> f();", format("\\\ntemplate <class T> f();"));
  EXPECT_EQ("/* \\  \\  \\\n*/", format("\\\n/* \\  \\  \\\n*/"));
  EXPECT_EQ("<a\n\\\\\n>", format("<a\n\\\\\n>"));
}

TEST_F(FormatTest, DontCrashOnBlockComments) {
  EXPECT_EQ(
      "int xxxxxxxxx; /* "
      "yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy\n"
      "zzzzzz\n"
      "0*/",
      format("int xxxxxxxxx;                          /* "
             "yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy zzzzzz\n"
             "0*/"));
}

TEST_F(FormatTest, CalculateSpaceOnConsecutiveLinesInMacro) {
  verifyFormat("#define A \\\n"
               "  int v(  \\\n"
               "      a); \\\n"
               "  int i;",
               getLLVMStyleWithColumns(11));
}

TEST_F(FormatTest, MixingPreprocessorDirectivesAndNormalCode) {
  EXPECT_EQ(
      "#define ALooooooooooooooooooooooooooooooooooooooongMacro("
      "                      \\\n"
      "    aLoooooooooooooooooooooooongFuuuuuuuuuuuuuunctiooooooooo)\n"
      "\n"
      "AlooooooooooooooooooooooooooooooooooooooongCaaaaaaaaaal(\n"
      "    aLooooooooooooooooooooooonPaaaaaaaaaaaaaaaaaaaaarmmmm);\n",
      format("  #define   ALooooooooooooooooooooooooooooooooooooooongMacro("
             "\\\n"
             "aLoooooooooooooooooooooooongFuuuuuuuuuuuuuunctiooooooooo)\n"
             "  \n"
             "   AlooooooooooooooooooooooooooooooooooooooongCaaaaaaaaaal(\n"
             "  aLooooooooooooooooooooooonPaaaaaaaaaaaaaaaaaaaaarmmmm);\n"));
}

TEST_F(FormatTest, LayoutStatementsAroundPreprocessorDirectives) {
  EXPECT_EQ("int\n"
            "#define A\n"
            "    a;",
            format("int\n#define A\na;"));
  verifyFormat("functionCallTo(\n"
               "    someOtherFunction(\n"
               "        withSomeParameters, whichInSequence,\n"
               "        areLongerThanALine(andAnotherCall,\n"
               "#define A B\n"
               "                           withMoreParamters,\n"
               "                           whichStronglyInfluenceTheLayout),\n"
               "        andMoreParameters),\n"
               "    trailing);",
               getLLVMStyleWithColumns(69));
  verifyFormat("Foo::Foo()\n"
               "#ifdef BAR\n"
               "    : baz(0)\n"
               "#endif\n"
               "{\n"
               "}");
  verifyFormat("void f() {\n"
               "  if (true)\n"
               "#ifdef A\n"
               "    f(42);\n"
               "  x();\n"
               "#else\n"
               "    g();\n"
               "  x();\n"
               "#endif\n"
               "}");
  verifyFormat("void f(param1, param2,\n"
               "       param3,\n"
               "#ifdef A\n"
               "       param4(param5,\n"
               "#ifdef A1\n"
               "              param6,\n"
               "#ifdef A2\n"
               "              param7),\n"
               "#else\n"
               "              param8),\n"
               "       param9,\n"
               "#endif\n"
               "       param10,\n"
               "#endif\n"
               "       param11)\n"
               "#else\n"
               "       param12)\n"
               "#endif\n"
               "{\n"
               "  x();\n"
               "}",
               getLLVMStyleWithColumns(28));
  verifyFormat("#if 1\n"
               "int i;");
  verifyFormat("#if 1\n"
               "#endif\n"
               "#if 1\n"
               "#else\n"
               "#endif\n");
  verifyFormat("DEBUG({\n"
               "  return aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +\n"
               "         aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;\n"
               "});\n"
               "#if a\n"
               "#else\n"
               "#endif");

  verifyIncompleteFormat("void f(\n"
                         "#if A\n"
                         "    );\n"
                         "#else\n"
                         "#endif");
}

TEST_F(FormatTest, GraciouslyHandleIncorrectPreprocessorConditions) {
  verifyFormat("#endif\n"
               "#if B");
}

TEST_F(FormatTest, FormatsJoinedLinesOnSubsequentRuns) {
  FormatStyle SingleLine = getLLVMStyle();
  SingleLine.AllowShortIfStatementsOnASingleLine = true;
  verifyFormat("#if 0\n"
               "#elif 1\n"
               "#endif\n"
               "void foo() {\n"
               "  if (test) foo2();\n"
               "}",
               SingleLine);
}

TEST_F(FormatTest, LayoutBlockInsideParens) {
  verifyFormat("functionCall({ int i; });");
  verifyFormat("functionCall({\n"
               "  int i;\n"
               "  int j;\n"
               "});");
  verifyFormat("functionCall(\n"
               "    {\n"
               "      int i;\n"
               "      int j;\n"
               "    },\n"
               "    aaaa, bbbb, cccc);");
  verifyFormat("functionA(functionB({\n"
               "            int i;\n"
               "            int j;\n"
               "          }),\n"
               "          aaaa, bbbb, cccc);");
  verifyFormat("functionCall(\n"
               "    {\n"
               "      int i;\n"
               "      int j;\n"
               "    },\n"
               "    aaaa, bbbb, // comment\n"
               "    cccc);");
  verifyFormat("functionA(functionB({\n"
               "            int i;\n"
               "            int j;\n"
               "          }),\n"
               "          aaaa, bbbb, // comment\n"
               "          cccc);");
  verifyFormat("functionCall(aaaa, bbbb, { int i; });");
  verifyFormat("functionCall(aaaa, bbbb, {\n"
               "  int i;\n"
               "  int j;\n"
               "});");
  verifyFormat(
      "Aaa(\n" // FIXME: There shouldn't be a linebreak here.
      "    {\n"
      "      int i; // break\n"
      "    },\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb,\n"
      "                                     ccccccccccccccccc));");
  verifyFormat("DEBUG({\n"
               "  if (a)\n"
               "    f();\n"
               "});");
}

TEST_F(FormatTest, LayoutBlockInsideStatement) {
  EXPECT_EQ("SOME_MACRO { int i; }\n"
            "int i;",
            format("  SOME_MACRO  {int i;}  int i;"));
}

TEST_F(FormatTest, LayoutNestedBlocks) {
  verifyFormat("void AddOsStrings(unsigned bitmask) {\n"
               "  struct s {\n"
               "    int i;\n"
               "  };\n"
               "  s kBitsToOs[] = {{10}};\n"
               "  for (int i = 0; i < 10; ++i)\n"
               "    return;\n"
               "}");
  verifyFormat("call(parameter, {\n"
               "  something();\n"
               "  // Comment using all columns.\n"
               "  somethingelse();\n"
               "});",
               getLLVMStyleWithColumns(40));
  verifyFormat("DEBUG( //\n"
               "    { f(); }, a);");
  verifyFormat("DEBUG( //\n"
               "    {\n"
               "      f(); //\n"
               "    },\n"
               "    a);");

  EXPECT_EQ("call(parameter, {\n"
            "  something();\n"
            "  // Comment too\n"
            "  // looooooooooong.\n"
            "  somethingElse();\n"
            "});",
            format("call(parameter, {\n"
                   "  something();\n"
                   "  // Comment too looooooooooong.\n"
                   "  somethingElse();\n"
                   "});",
                   getLLVMStyleWithColumns(29)));
  EXPECT_EQ("DEBUG({ int i; });", format("DEBUG({ int   i; });"));
  EXPECT_EQ("DEBUG({ // comment\n"
            "  int i;\n"
            "});",
            format("DEBUG({ // comment\n"
                   "int  i;\n"
                   "});"));
  EXPECT_EQ("DEBUG({\n"
            "  int i;\n"
            "\n"
            "  // comment\n"
            "  int j;\n"
            "});",
            format("DEBUG({\n"
                   "  int  i;\n"
                   "\n"
                   "  // comment\n"
                   "  int  j;\n"
                   "});"));

  verifyFormat("DEBUG({\n"
               "  if (a)\n"
               "    return;\n"
               "});");
  verifyGoogleFormat("DEBUG({\n"
                     "  if (a) return;\n"
                     "});");
  FormatStyle Style = getGoogleStyle();
  Style.ColumnLimit = 45;
  verifyFormat("Debug(aaaaa,\n"
               "      {\n"
               "        if (aaaaaaaaaaaaaaaaaaaaaaaa) return;\n"
               "      },\n"
               "      a);",
               Style);

  verifyFormat("SomeFunction({MACRO({ return output; }), b});");

  verifyNoCrash("^{v^{a}}");
}

TEST_F(FormatTest, FormatNestedBlocksInMacros) {
  EXPECT_EQ("#define MACRO()                     \\\n"
            "  Debug(aaa, /* force line break */ \\\n"
            "        {                           \\\n"
            "          int i;                    \\\n"
            "          int j;                    \\\n"
            "        })",
            format("#define   MACRO()   Debug(aaa,  /* force line break */ \\\n"
                   "          {  int   i;  int  j;   })",
                   getGoogleStyle()));

  EXPECT_EQ("#define A                                       \\\n"
            "  [] {                                          \\\n"
            "    xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx(        \\\n"
            "        xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx); \\\n"
            "  }",
            format("#define A [] { xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx( \\\n"
                   "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx); }",
                   getGoogleStyle()));
}

TEST_F(FormatTest, PutEmptyBlocksIntoOneLine) {
  EXPECT_EQ("{}", format("{}"));
  verifyFormat("enum E {};");
  verifyFormat("enum E {}");
}

TEST_F(FormatTest, FormatBeginBlockEndMacros) {
  FormatStyle Style = getLLVMStyle();
  Style.MacroBlockBegin = "^[A-Z_]+_BEGIN$";
  Style.MacroBlockEnd = "^[A-Z_]+_END$";
  verifyFormat("FOO_BEGIN\n"
               "  FOO_ENTRY\n"
               "FOO_END", Style);
  verifyFormat("FOO_BEGIN\n"
               "  NESTED_FOO_BEGIN\n"
               "    NESTED_FOO_ENTRY\n"
               "  NESTED_FOO_END\n"
               "FOO_END", Style);
  verifyFormat("FOO_BEGIN(Foo, Bar)\n"
               "  int x;\n"
               "  x = 1;\n"
               "FOO_END(Baz)", Style);
}

//===----------------------------------------------------------------------===//
// Line break tests.
//===----------------------------------------------------------------------===//

TEST_F(FormatTest, PreventConfusingIndents) {
  verifyFormat(
      "void f() {\n"
      "  SomeLongMethodName(SomeReallyLongMethod(CallOtherReallyLongMethod(\n"
      "                         parameter, parameter, parameter)),\n"
      "                     SecondLongCall(parameter));\n"
      "}");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa),\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "    [aaaaaaaaaaaaaaaaaaaaaaaa\n"
      "         [aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa]\n"
      "         [aaaaaaaaaaaaaaaaaaaaaaaa]];");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa<\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaa<\n"
      "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa>,\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaa>;");
  verifyFormat("int a = bbbb && ccc &&\n"
               "        fffff(\n"
               "#define A Just forcing a new line\n"
               "            ddd);");
}

TEST_F(FormatTest, LineBreakingInBinaryExpressions) {
  verifyFormat(
      "bool aaaaaaa =\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaa).aaaaaaaaaaaaaaaaaaa() ||\n"
      "    bbbbbbbb();");
  verifyFormat(
      "bool aaaaaaa =\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaa).aaaaaaaaaaaaaaaaaaa() or\n"
      "    bbbbbbbb();");

  verifyFormat("bool aaaaaaaaaaaaaaaaaaaaa =\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa != bbbbbbbbbbbbbbbbbb &&\n"
               "    ccccccccc == ddddddddddd;");
  verifyFormat("bool aaaaaaaaaaaaaaaaaaaaa =\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa != bbbbbbbbbbbbbbbbbb and\n"
               "    ccccccccc == ddddddddddd;");
  verifyFormat(
      "bool aaaaaaaaaaaaaaaaaaaaa =\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa not_eq bbbbbbbbbbbbbbbbbb and\n"
      "    ccccccccc == ddddddddddd;");

  verifyFormat("aaaaaa = aaaaaaa(aaaaaaa, // break\n"
               "                 aaaaaa) &&\n"
               "         bbbbbb && cccccc;");
  verifyFormat("aaaaaa = aaaaaaa(aaaaaaa, // break\n"
               "                 aaaaaa) >>\n"
               "         bbbbbb;");
  verifyFormat("aa = Whitespaces.addUntouchableComment(\n"
               "    SourceMgr.getSpellingColumnNumber(\n"
               "        TheLine.Last->FormatTok.Tok.getLocation()) -\n"
               "    1);");

  verifyFormat("if ((aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
               "     bbbbbbbbbbbbbbbbbb) && // aaaaaaaaaaaaaaaa\n"
               "    cccccc) {\n}");
  verifyFormat("b = a &&\n"
               "    // Comment\n"
               "    b.c && d;");

  // If the LHS of a comparison is not a binary expression itself, the
  // additional linebreak confuses many people.
  verifyFormat(
      "if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) > 5) {\n"
      "}");
  verifyFormat(
      "if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) == 5) {\n"
      "}");
  verifyFormat(
      "if (aaaaaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaaaaaaaaa(\n"
      "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) == 5) {\n"
      "}");
  // Even explicit parentheses stress the precedence enough to make the
  // additional break unnecessary.
  verifyFormat("if ((aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +\n"
               "     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) == 5) {\n"
               "}");
  // This cases is borderline, but with the indentation it is still readable.
  verifyFormat(
      "if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "        aaaaaaaaaaaaaaa) > aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +\n"
      "                               aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n"
      "}",
      getLLVMStyleWithColumns(75));

  // If the LHS is a binary expression, we should still use the additional break
  // as otherwise the formatting hides the operator precedence.
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ==\n"
               "    5) {\n"
               "}");

  FormatStyle OnePerLine = getLLVMStyle();
  OnePerLine.BinPackParameters = false;
  verifyFormat(
      "if (aaaaaaaaaaaaaaaaaaaaaaaaaaaa || aaaaaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaa || aaaaaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n}",
      OnePerLine);

  verifyFormat("int i = someFunction(aaaaaaa, 0)\n"
               "                .aaa(aaaaaaaaaaaaa) *\n"
               "            aaaaaaa +\n"
               "        aaaaaaa;",
               getLLVMStyleWithColumns(40));
}

TEST_F(FormatTest, ExpressionIndentation) {
  verifyFormat("bool value = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +\n"
               "                     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +\n"
               "                     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ==\n"
               "                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *\n"
               "                         bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb +\n"
               "                     bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb &&\n"
               "             aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *\n"
               "                     aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa >\n"
               "                 ccccccccccccccccccccccccccccccccccccccccc;");
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *\n"
               "            aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ==\n"
               "    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb) {\n}");
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *\n"
               "            aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ==\n"
               "    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb) {\n}");
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ==\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *\n"
               "            aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +\n"
               "        bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb) {\n}");
  verifyFormat("if () {\n"
               "} else if (aaaaa &&\n"
               "           bbbbb > // break\n"
               "               ccccc) {\n"
               "}");

  // Presence of a trailing comment used to change indentation of b.
  verifyFormat("return aaaaaaaaaaaaaaaaaaa +\n"
               "       b;\n"
               "return aaaaaaaaaaaaaaaaaaa +\n"
               "       b; //",
               getLLVMStyleWithColumns(30));
}

TEST_F(FormatTest, ExpressionIndentationBreakingBeforeOperators) {
  // Not sure what the best system is here. Like this, the LHS can be found
  // immediately above an operator (everything with the same or a higher
  // indent). The RHS is aligned right of the operator and so compasses
  // everything until something with the same indent as the operator is found.
  // FIXME: Is this a good system?
  FormatStyle Style = getLLVMStyle();
  Style.BreakBeforeBinaryOperators = FormatStyle::BOS_All;
  verifyFormat(
      "bool value = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                     + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                     + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                 == aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                            * bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n"
      "                        + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n"
      "             && aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                        * aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                    > ccccccccccccccccccccccccccccccccccccccccc;",
      Style);
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "            * aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    == bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb) {\n}",
               Style);
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "              * aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    == bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb) {\n}",
               Style);
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    == aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "               * aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "           + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb) {\n}",
               Style);
  verifyFormat("if () {\n"
               "} else if (aaaaa\n"
               "           && bbbbb // break\n"
               "                  > ccccc) {\n"
               "}",
               Style);
  verifyFormat("return (a)\n"
               "       // comment\n"
               "       + b;",
               Style);
  verifyFormat(
      "int aaaaaa = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                 * bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n"
      "             + cc;",
      Style);

  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    = aaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaaaaa;",
               Style);

  // Forced by comments.
  verifyFormat(
      "unsigned ContentSize =\n"
      "    sizeof(int16_t)   // DWARF ARange version number\n"
      "    + sizeof(int32_t) // Offset of CU in the .debug_info section\n"
      "    + sizeof(int8_t)  // Pointer Size (in bytes)\n"
      "    + sizeof(int8_t); // Segment Size (in bytes)");

  verifyFormat("return boost::fusion::at_c<0>(iiii).second\n"
               "       == boost::fusion::at_c<1>(iiii).second;",
               Style);

  Style.ColumnLimit = 60;
  verifyFormat("zzzzzzzzzz\n"
               "    = bbbbbbbbbbbbbbbbb\n"
               "      >> aaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaa);",
               Style);
}

TEST_F(FormatTest, NoOperandAlignment) {
  FormatStyle Style = getLLVMStyle();
  Style.AlignOperands = false;
  Style.BreakBeforeBinaryOperators = FormatStyle::BOS_NonAssignment;
  verifyFormat("bool value = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "            + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "            + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        == aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "                * bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n"
               "            + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n"
               "    && aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "            * aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        > ccccccccccccccccccccccccccccccccccccccccc;",
               Style);

  verifyFormat("int aaaaaa = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        * bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n"
               "    + cc;",
               Style);
  verifyFormat("int a = aa\n"
               "    + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\n"
               "        * cccccccccccccccccccccccccccccccccccc;",
               Style);

  Style.AlignAfterOpenBracket = FormatStyle::BAS_DontAlign;
  verifyFormat("return (a > b\n"
               "    // comment1\n"
               "    // comment2\n"
               "    || c);",
               Style);
}

TEST_F(FormatTest, BreakingBeforeNonAssigmentOperators) {
  FormatStyle Style = getLLVMStyle();
  Style.BreakBeforeBinaryOperators = FormatStyle::BOS_NonAssignment;
  verifyFormat("int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;",
               Style);
}

TEST_F(FormatTest, ConstructorInitializers) {
  verifyFormat("Constructor() : Initializer(FitsOnTheLine) {}");
  verifyFormat("Constructor() : Inttializer(FitsOnTheLine) {}",
               getLLVMStyleWithColumns(45));
  verifyFormat("Constructor()\n"
               "    : Inttializer(FitsOnTheLine) {}",
               getLLVMStyleWithColumns(44));
  verifyFormat("Constructor()\n"
               "    : Inttializer(FitsOnTheLine) {}",
               getLLVMStyleWithColumns(43));

  verifyFormat("template <typename T>\n"
               "Constructor() : Initializer(FitsOnTheLine) {}",
               getLLVMStyleWithColumns(45));

  verifyFormat(
      "SomeClass::Constructor()\n"
      "    : aaaaaaaaaaaaa(aaaaaaaaaaaaaa), aaaaaaaaaaaaaaa(aaaaaaaaaaaa) {}");

  verifyFormat(
      "SomeClass::Constructor()\n"
      "    : aaaaaaaaaaaaa(aaaaaaaaaaaaaa), aaaaaaaaaaaaa(aaaaaaaaaaaaaa),\n"
      "      aaaaaaaaaaaaa(aaaaaaaaaaaaaa) {}");
  verifyFormat(
      "SomeClass::Constructor()\n"
      "    : aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa),\n"
      "      aaaaaaaaaaaaaaa(aaaaaaaaaaaa) {}");
  verifyFormat("Constructor(aaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "            aaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "    : aaaaaaaaaa(aaaaaa) {}");

  verifyFormat("Constructor()\n"
               "    : aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaa),\n"
               "      aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "                               aaaaaaaaaaaaaaaaaaaaaaaaaaa),\n"
               "      aaaaaaaaaaaaaaaaaaaaaaa() {}");

  verifyFormat("Constructor()\n"
               "    : aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "          aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}");

  verifyFormat("Constructor(int Parameter = 0)\n"
               "    : aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaa),\n"
               "      aaaaaaaaaaaa(aaaaaaaaaaaaaaaaa) {}");
  verifyFormat("Constructor()\n"
               "    : aaaaaaaaaaaaaaaaaaaa(a), bbbbbbbbbbbbbbbbbbbbbbbb(b) {\n"
               "}",
               getLLVMStyleWithColumns(60));
  verifyFormat("Constructor()\n"
               "    : aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "          aaaaaaaaaaaaaaaaaaaaaaaaa(aaaa, aaaa)) {}");

  // Here a line could be saved by splitting the second initializer onto two
  // lines, but that is not desirable.
  verifyFormat("Constructor()\n"
               "    : aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaa),\n"
               "      aaaaaaaaaaa(aaaaaaaaaaa),\n"
               "      aaaaaaaaaaaaaaaaaaaaat(aaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}");

  FormatStyle OnePerLine = getLLVMStyle();
  OnePerLine.ConstructorInitializerAllOnOneLineOrOnePerLine = true;
  OnePerLine.AllowAllParametersOfDeclarationOnNextLine = false;
  verifyFormat("SomeClass::Constructor()\n"
               "    : aaaaaaaaaaaaa(aaaaaaaaaaaaaa),\n"
               "      aaaaaaaaaaaaa(aaaaaaaaaaaaaa),\n"
               "      aaaaaaaaaaaaa(aaaaaaaaaaaaaa) {}",
               OnePerLine);
  verifyFormat("SomeClass::Constructor()\n"
               "    : aaaaaaaaaaaaa(aaaaaaaaaaaaaa), // Some comment\n"
               "      aaaaaaaaaaaaa(aaaaaaaaaaaaaa),\n"
               "      aaaaaaaaaaaaa(aaaaaaaaaaaaaa) {}",
               OnePerLine);
  verifyFormat("MyClass::MyClass(int var)\n"
               "    : some_var_(var),            // 4 space indent\n"
               "      some_other_var_(var + 1) { // lined up\n"
               "}",
               OnePerLine);
  verifyFormat("Constructor()\n"
               "    : aaaaa(aaaaaa),\n"
               "      aaaaa(aaaaaa),\n"
               "      aaaaa(aaaaaa),\n"
               "      aaaaa(aaaaaa),\n"
               "      aaaaa(aaaaaa) {}",
               OnePerLine);
  verifyFormat("Constructor()\n"
               "    : aaaaa(aaaaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaa,\n"
               "            aaaaaaaaaaaaaaaaaaaaaa) {}",
               OnePerLine);
  OnePerLine.BinPackParameters = false;
  verifyFormat(
      "Constructor()\n"
      "    : aaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "          aaaaaaaaaaa().aaa(),\n"
      "          aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}",
      OnePerLine);
  OnePerLine.ColumnLimit = 60;
  verifyFormat("Constructor()\n"
               "    : aaaaaaaaaaaaaaaaaaaa(a),\n"
               "      bbbbbbbbbbbbbbbbbbbbbbbb(b) {}",
               OnePerLine);

  EXPECT_EQ("Constructor()\n"
            "    : // Comment forcing unwanted break.\n"
            "      aaaa(aaaa) {}",
            format("Constructor() :\n"
                   "    // Comment forcing unwanted break.\n"
                   "    aaaa(aaaa) {}"));
}

TEST_F(FormatTest, MemoizationTests) {
  // This breaks if the memoization lookup does not take \c Indent and
  // \c LastSpace into account.
  verifyFormat(
      "extern CFRunLoopTimerRef\n"
      "CFRunLoopTimerCreate(CFAllocatorRef allocato, CFAbsoluteTime fireDate,\n"
      "                     CFTimeInterval interval, CFOptionFlags flags,\n"
      "                     CFIndex order, CFRunLoopTimerCallBack callout,\n"
      "                     CFRunLoopTimerContext *context) {}");

  // Deep nesting somewhat works around our memoization.
  verifyFormat(
      "aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(\n"
      "    aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(\n"
      "        aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(\n"
      "            aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(aaaaa(\n"
      "                aaaaa())))))))))))))))))))))))))))))))))))))));",
      getLLVMStyleWithColumns(65));
  verifyFormat(
      "aaaaa(\n"
      "    aaaaa,\n"
      "    aaaaa(\n"
      "        aaaaa,\n"
      "        aaaaa(\n"
      "            aaaaa,\n"
      "            aaaaa(\n"
      "                aaaaa,\n"
      "                aaaaa(\n"
      "                    aaaaa,\n"
      "                    aaaaa(\n"
      "                        aaaaa,\n"
      "                        aaaaa(\n"
      "                            aaaaa,\n"
      "                            aaaaa(\n"
      "                                aaaaa,\n"
      "                                aaaaa(\n"
      "                                    aaaaa,\n"
      "                                    aaaaa(\n"
      "                                        aaaaa,\n"
      "                                        aaaaa(\n"
      "                                            aaaaa,\n"
      "                                            aaaaa(\n"
      "                                                aaaaa,\n"
      "                                                aaaaa))))))))))));",
      getLLVMStyleWithColumns(65));
  verifyFormat(
      "a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(a(), a), a), a), a),\n"
      "                                  a),\n"
      "                                a),\n"
      "                              a),\n"
      "                            a),\n"
      "                          a),\n"
      "                        a),\n"
      "                      a),\n"
      "                    a),\n"
      "                  a),\n"
      "                a),\n"
      "              a),\n"
      "            a),\n"
      "          a),\n"
      "        a),\n"
      "      a),\n"
      "    a),\n"
      "  a)",
      getLLVMStyleWithColumns(65));

  // This test takes VERY long when memoization is broken.
  FormatStyle OnePerLine = getLLVMStyle();
  OnePerLine.ConstructorInitializerAllOnOneLineOrOnePerLine = true;
  OnePerLine.BinPackParameters = false;
  std::string input = "Constructor()\n"
                      "    : aaaa(a,\n";
  for (unsigned i = 0, e = 80; i != e; ++i) {
    input += "           a,\n";
  }
  input += "           a) {}";
  verifyFormat(input, OnePerLine);
}

TEST_F(FormatTest, BreaksAsHighAsPossible) {
  verifyFormat(
      "void f() {\n"
      "  if ((aaaaaaaaaaaaaaaaaaaaaaaaaaaaa && aaaaaaaaaaaaaaaaaaaaaaaaaa) ||\n"
      "      (bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb && bbbbbbbbbbbbbbbbbbbbbbbbbb))\n"
      "    f();\n"
      "}");
  verifyFormat("if (Intervals[i].getRange().getFirst() <\n"
               "    Intervals[i - 1].getRange().getLast()) {\n}");
}

TEST_F(FormatTest, BreaksFunctionDeclarations) {
  // Principially, we break function declarations in a certain order:
  // 1) break amongst arguments.
  verifyFormat("Aaaaaaaaaaaaaa bbbbbbbbbbbbbb(Cccccccccccccc cccccccccccccc,\n"
               "                              Cccccccccccccc cccccccccccccc);");
  verifyFormat("template <class TemplateIt>\n"
               "SomeReturnType SomeFunction(TemplateIt begin, TemplateIt end,\n"
               "                            TemplateIt *stop) {}");

  // 2) break after return type.
  verifyFormat(
      "Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "bbbbbbbbbbbbbb(Cccccccccccccc cccccccccccccccccccccccccc);",
      getGoogleStyle());

  // 3) break after (.
  verifyFormat(
      "Aaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbbbbbb(\n"
      "    Cccccccccccccccccccccccccccccc cccccccccccccccccccccccccccccccc);",
      getGoogleStyle());

  // 4) break before after nested name specifiers.
  verifyFormat(
      "Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "SomeClasssssssssssssssssssssssssssssssssssssss::\n"
      "    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb(Cccccccccccccc cccccccccc);",
      getGoogleStyle());

  // However, there are exceptions, if a sufficient amount of lines can be
  // saved.
  // FIXME: The precise cut-offs wrt. the number of saved lines might need some
  // more adjusting.
  verifyFormat("Aaaaaaaaaaaaaaaaaa bbbbbbbbbbbbbb(Cccccccccccccc cccccccccc,\n"
               "                                  Cccccccccccccc cccccccccc,\n"
               "                                  Cccccccccccccc cccccccccc,\n"
               "                                  Cccccccccccccc cccccccccc,\n"
               "                                  Cccccccccccccc cccccccccc);");
  verifyFormat(
      "Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "bbbbbbbbbbb(Cccccccccccccc cccccccccc, Cccccccccccccc cccccccccc,\n"
      "            Cccccccccccccc cccccccccc, Cccccccccccccc cccccccccc,\n"
      "            Cccccccccccccc cccccccccc, Cccccccccccccc cccccccccc);",
      getGoogleStyle());
  verifyFormat(
      "Aaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbb(Cccccccccccccc cccccccccc,\n"
      "                                          Cccccccccccccc cccccccccc,\n"
      "                                          Cccccccccccccc cccccccccc,\n"
      "                                          Cccccccccccccc cccccccccc,\n"
      "                                          Cccccccccccccc cccccccccc,\n"
      "                                          Cccccccccccccc cccccccccc,\n"
      "                                          Cccccccccccccc cccccccccc);");
  verifyFormat("Aaaaaaaaaa bbbbbbbbbbbbbbbbbbbbbbbbbbbbbb(\n"
               "    Cccccccccccccc cccccccccc, Cccccccccccccc cccccccccc,\n"
               "    Cccccccccccccc cccccccccc, Cccccccccccccc cccccccccc,\n"
               "    Cccccccccccccc cccccccccc, Cccccccccccccc cccccccccc,\n"
               "    Cccccccccccccc cccccccccc, Cccccccccccccc cccccccccc);");

  // Break after multi-line parameters.
  verifyFormat("void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "    bbbb bbbb);");
  verifyFormat("void SomeLoooooooooooongFunction(\n"
               "    std::unique_ptr<aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa>\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "    int bbbbbbbbbbbbb);");

  // Treat overloaded operators like other functions.
  verifyFormat("SomeLoooooooooooooooooooooooooogType\n"
               "operator>(const SomeLoooooooooooooooooooooooooogType &other);");
  verifyFormat("SomeLoooooooooooooooooooooooooogType\n"
               "operator>>(const SomeLooooooooooooooooooooooooogType &other);");
  verifyFormat("SomeLoooooooooooooooooooooooooogType\n"
               "operator<<(const SomeLooooooooooooooooooooooooogType &other);");
  verifyGoogleFormat(
      "SomeLoooooooooooooooooooooooooooooogType operator>>(\n"
      "    const SomeLooooooooogType &a, const SomeLooooooooogType &b);");
  verifyGoogleFormat(
      "SomeLoooooooooooooooooooooooooooooogType operator<<(\n"
      "    const SomeLooooooooogType &a, const SomeLooooooooogType &b);");
  verifyFormat("void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa = 1);");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaa\n"
               "aaaaaaaaaaaaaaaaaaaaaaaaa(int aaaaaaaaaaaaaaaaaaaaaaaa = 1);");
  verifyGoogleFormat(
      "typename aaaaaaaaaa<aaaaaa>::aaaaaaaaaaa\n"
      "aaaaaaaaaa<aaaaaa>::aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    bool *aaaaaaaaaaaaaaaaaa, bool *aa) {}");
  verifyGoogleFormat(
      "template <typename T>\n"
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "aaaaaaaaaaaaaaaaaaaaaaa<T>::aaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaa);");

  FormatStyle Style = getLLVMStyle();
  Style.PointerAlignment = FormatStyle::PAS_Left;
  verifyFormat("void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaa* const aaaaaaaaaaaa) {}",
               Style);
  verifyFormat("void aaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa*\n"
               "                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}",
               Style);
}

TEST_F(FormatTest, TrailingReturnType) {
  verifyFormat("auto foo() -> int;\n");
  verifyFormat("struct S {\n"
               "  auto bar() const -> int;\n"
               "};");
  verifyFormat("template <size_t Order, typename T>\n"
               "auto load_img(const std::string &filename)\n"
               "    -> alias::tensor<Order, T, mem::tag::cpu> {}");
  verifyFormat("auto SomeFunction(A aaaaaaaaaaaaaaaaaaaaa) const\n"
               "    -> decltype(f(aaaaaaaaaaaaaaaaaaaaa)) {}");
  verifyFormat("auto doSomething(Aaaaaa *aaaaaa) -> decltype(aaaaaa->f()) {}");
  verifyFormat("template <typename T>\n"
               "auto aaaaaaaaaaaaaaaaaaaaaa(T t)\n"
               "    -> decltype(eaaaaaaaaaaaaaaa<T>(t.a).aaaaaaaa());");

  // Not trailing return types.
  verifyFormat("void f() { auto a = b->c(); }");
}

TEST_F(FormatTest, BreaksFunctionDeclarationsWithTrailingTokens) {
  // Avoid breaking before trailing 'const' or other trailing annotations, if
  // they are not function-like.
  FormatStyle Style = getGoogleStyle();
  Style.ColumnLimit = 47;
  verifyFormat("void someLongFunction(\n"
               "    int someLoooooooooooooongParameter) const {\n}",
               getLLVMStyleWithColumns(47));
  verifyFormat("LoooooongReturnType\n"
               "someLoooooooongFunction() const {}",
               getLLVMStyleWithColumns(47));
  verifyFormat("LoooooongReturnType someLoooooooongFunction()\n"
               "    const {}",
               Style);
  verifyFormat("void SomeFunction(aaaaa aaaaaaaaaaaaaaaaaaaa,\n"
               "                  aaaaa aaaaaaaaaaaaaaaaaaaa) OVERRIDE;");
  verifyFormat("void SomeFunction(aaaaa aaaaaaaaaaaaaaaaaaaa,\n"
               "                  aaaaa aaaaaaaaaaaaaaaaaaaa) OVERRIDE FINAL;");
  verifyFormat("void SomeFunction(aaaaa aaaaaaaaaaaaaaaaaaaa,\n"
               "                  aaaaa aaaaaaaaaaaaaaaaaaaa) override final;");
  verifyFormat("virtual void aaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaa aaaa,\n"
               "                   aaaaaaaaaaa aaaaa) const override;");
  verifyGoogleFormat(
      "virtual void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()\n"
      "    const override;");

  // Even if the first parameter has to be wrapped.
  verifyFormat("void someLongFunction(\n"
               "    int someLongParameter) const {}",
               getLLVMStyleWithColumns(46));
  verifyFormat("void someLongFunction(\n"
               "    int someLongParameter) const {}",
               Style);
  verifyFormat("void someLongFunction(\n"
               "    int someLongParameter) override {}",
               Style);
  verifyFormat("void someLongFunction(\n"
               "    int someLongParameter) OVERRIDE {}",
               Style);
  verifyFormat("void someLongFunction(\n"
               "    int someLongParameter) final {}",
               Style);
  verifyFormat("void someLongFunction(\n"
               "    int someLongParameter) FINAL {}",
               Style);
  verifyFormat("void someLongFunction(\n"
               "    int parameter) const override {}",
               Style);

  Style.BreakBeforeBraces = FormatStyle::BS_Allman;
  verifyFormat("void someLongFunction(\n"
               "    int someLongParameter) const\n"
               "{\n"
               "}",
               Style);

  // Unless these are unknown annotations.
  verifyFormat("void SomeFunction(aaaaaaaaaa aaaaaaaaaaaaaaa,\n"
               "                  aaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "    LONG_AND_UGLY_ANNOTATION;");

  // Breaking before function-like trailing annotations is fine to keep them
  // close to their arguments.
  verifyFormat("void aaaaaaaaaaaa(int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "    LOCKS_EXCLUDED(aaaaaaaaaaaaa);");
  verifyFormat("void aaaaaaaaaaaa(int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) const\n"
               "    LOCKS_EXCLUDED(aaaaaaaaaaaaa);");
  verifyFormat("void aaaaaaaaaaaa(int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) const\n"
               "    LOCKS_EXCLUDED(aaaaaaaaaaaaa) {}");
  verifyGoogleFormat("void aaaaaaaaaaaaaa(aaaaaaaa aaa) override\n"
                     "    AAAAAAAAAAAAAAAAAAAAAAAA(aaaaaaaaaaaaaaa);");
  verifyFormat("SomeFunction([](int i) LOCKS_EXCLUDED(a) {});");

  verifyFormat(
      "void aaaaaaaaaaaaaaaaaa()\n"
      "    __attribute__((aaaaaaaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                   aaaaaaaaaaaaaaaaaaaaaaaaa));");
  verifyFormat("bool aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    __attribute__((unused));");
  verifyGoogleFormat(
      "bool aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "    GUARDED_BY(aaaaaaaaaaaa);");
  verifyGoogleFormat(
      "bool aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "    GUARDED_BY(aaaaaaaaaaaa);");
  verifyGoogleFormat(
      "bool aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa GUARDED_BY(aaaaaaaaaaaa) =\n"
      "    aaaaaaaa::aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyGoogleFormat(
      "bool aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa GUARDED_BY(aaaaaaaaaaaa) =\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaa;");
}

TEST_F(FormatTest, FunctionAnnotations) {
  verifyFormat("DEPRECATED(\"Use NewClass::NewFunction instead.\")\n"
               "int OldFunction(const string &parameter) {}");
  verifyFormat("DEPRECATED(\"Use NewClass::NewFunction instead.\")\n"
               "string OldFunction(const string &parameter) {}");
  verifyFormat("template <typename T>\n"
               "DEPRECATED(\"Use NewClass::NewFunction instead.\")\n"
               "string OldFunction(const string &parameter) {}");

  // Not function annotations.
  verifyFormat("ASSERT(\"aaaaa\") << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "                << bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
  verifyFormat("TEST_F(ThisIsATestFixtureeeeeeeeeeeee,\n"
               "       ThisIsATestWithAReallyReallyReallyReallyLongName) {}");
  verifyFormat("MACRO(abc).function() // wrap\n"
               "    << abc;");
  verifyFormat("MACRO(abc)->function() // wrap\n"
               "    << abc;");
  verifyFormat("MACRO(abc)::function() // wrap\n"
               "    << abc;");
}

TEST_F(FormatTest, BreaksDesireably) {
  verifyFormat("if (aaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaa) ||\n"
               "    aaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaa) ||\n"
               "    aaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaa)) {\n}");
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)) {\n"
               "}");

  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}");

  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa));");

  verifyFormat(
      "aaaaaaaa(aaaaaaaaaaaaa,\n"
      "         aaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "             aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)),\n"
      "         aaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "             aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)));");

  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
               "    (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");

  verifyFormat(
      "void f() {\n"
      "  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa &&\n"
      "                                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);\n"
      "}");
  verifyFormat(
      "aaaaaa(new Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaa));");
  verifyFormat(
      "aaaaaa(aaa,\n"
      "       new Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "           aaaaaaaaaaaaaaaaaaaaaaaaaaaaa));");
  verifyFormat("aaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +\n"
               "                      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "                  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");

  // Indent consistently independent of call expression and unary operator.
  verifyFormat("aaaaaaaaaaa(bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb(\n"
               "    dddddddddddddddddddddddddddddd));");
  verifyFormat("aaaaaaaaaaa(!bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb(\n"
               "    dddddddddddddddddddddddddddddd));");
  verifyFormat("aaaaaaaaaaa(bbbbbbbbbbbbbbbbbbbbbbbbb.ccccccccccccccccc(\n"
               "    dddddddddddddddddddddddddddddd));");

  // This test case breaks on an incorrect memoization, i.e. an optimization not
  // taking into account the StopAt value.
  verifyFormat(
      "return aaaaaaaaaaaaaaaaaaaaaaaa || aaaaaaaaaaaaaaaaaaaaaaa ||\n"
      "       aaaaaaaaaaa(aaaaaaaaa) || aaaaaaaaaaaaaaaaaaaaaaa ||\n"
      "       aaaaaaaaaaaaaaaaaaaaaaaaa || aaaaaaaaaaaaaaaaaaaaaaa ||\n"
      "       (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");

  verifyFormat("{\n  {\n    {\n"
               "      Annotation.SpaceRequiredBefore =\n"
               "          Line.Tokens[i - 1].Tok.isNot(tok::l_paren) &&\n"
               "          Line.Tokens[i - 1].Tok.isNot(tok::l_square);\n"
               "    }\n  }\n}");

  // Break on an outer level if there was a break on an inner level.
  EXPECT_EQ("f(g(h(a, // comment\n"
            "      b, c),\n"
            "    d, e),\n"
            "  x, y);",
            format("f(g(h(a, // comment\n"
                   "    b, c), d, e), x, y);"));

  // Prefer breaking similar line breaks.
  verifyFormat(
      "const int kTrackingOptions = NSTrackingMouseMoved |\n"
      "                             NSTrackingMouseEnteredAndExited |\n"
      "                             NSTrackingActiveAlways;");
}

TEST_F(FormatTest, FormatsDeclarationsOnePerLine) {
  FormatStyle NoBinPacking = getGoogleStyle();
  NoBinPacking.BinPackParameters = false;
  NoBinPacking.BinPackArguments = true;
  verifyFormat("void f() {\n"
               "  f(aaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaa,\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);\n"
               "}",
               NoBinPacking);
  verifyFormat("void f(int aaaaaaaaaaaaaaaaaaaa,\n"
               "       int aaaaaaaaaaaaaaaaaaaa,\n"
               "       int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}",
               NoBinPacking);

  NoBinPacking.AllowAllParametersOfDeclarationOnNextLine = false;
  verifyFormat("void aaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "                        vector<int> bbbbbbbbbbbbbbb);",
               NoBinPacking);
  // FIXME: This behavior difference is probably not wanted. However, currently
  // we cannot distinguish BreakBeforeParameter being set because of the wrapped
  // template arguments from BreakBeforeParameter being set because of the
  // one-per-line formatting.
  verifyFormat(
      "void fffffffffff(aaaaaaaaaaaaaaaaaaaaaaaaaaa<aaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                                             aaaaaaaaaa> aaaaaaaaaa);",
      NoBinPacking);
  verifyFormat(
      "void fffffffffff(\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaa<aaaaaaaaaaaaaaaaaaaaaaa, aaaaaaaaaa>\n"
      "        aaaaaaaaaa);");
}

TEST_F(FormatTest, FormatsOneParameterPerLineIfNecessary) {
  FormatStyle NoBinPacking = getGoogleStyle();
  NoBinPacking.BinPackParameters = false;
  NoBinPacking.BinPackArguments = false;
  verifyFormat("f(aaaaaaaaaaaaaaaaaaaa,\n"
               "  aaaaaaaaaaaaaaaaaaaa,\n"
               "  aaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaa);",
               NoBinPacking);
  verifyFormat("aaaaaaa(aaaaaaaaaaaaa,\n"
               "        aaaaaaaaaaaaa,\n"
               "        aaaaaaaaaaaaa(aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaa));",
               NoBinPacking);
  verifyFormat(
      "aaaaaaaa(aaaaaaaaaaaaa,\n"
      "         aaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "             aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)),\n"
      "         aaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "             aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)));",
      NoBinPacking);
  verifyFormat("aaaaaaaaaaaaaaa(aaaaaaaaa, aaaaaaaaa, aaaaaaaaaaaaaaaaaaaaa)\n"
               "    .aaaaaaaaaaaaaaaaaa();",
               NoBinPacking);
  verifyFormat("void f() {\n"
               "  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "      aaaaaaaaaa, aaaaaaaaaa, aaaaaaaaaa, aaaaaaaaaaa);\n"
               "}",
               NoBinPacking);

  verifyFormat(
      "aaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "             aaaaaaaaaaaa,\n"
      "             aaaaaaaaaaaa);",
      NoBinPacking);
  verifyFormat(
      "somefunction(someotherFunction(ddddddddddddddddddddddddddddddddddd,\n"
      "                               ddddddddddddddddddddddddddddd),\n"
      "             test);",
      NoBinPacking);

  verifyFormat("std::vector<aaaaaaaaaaaaaaaaaaaaaaa,\n"
               "            aaaaaaaaaaaaaaaaaaaaaaa,\n"
               "            aaaaaaaaaaaaaaaaaaaaaaa>\n"
               "    aaaaaaaaaaaaaaaaaa;",
               NoBinPacking);
  verifyFormat("a(\"a\"\n"
               "  \"a\",\n"
               "  a);");

  NoBinPacking.AllowAllParametersOfDeclarationOnNextLine = false;
  verifyFormat("void aaaaaaaaaa(aaaaaaaaa,\n"
               "                aaaaaaaaa,\n"
               "                aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
               NoBinPacking);
  verifyFormat(
      "void f() {\n"
      "  aaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaa, aaaaaaaaa, aaaaaaaaaaaaaaaaaaaaa)\n"
      "      .aaaaaaa();\n"
      "}",
      NoBinPacking);
  verifyFormat(
      "template <class SomeType, class SomeOtherType>\n"
      "SomeType SomeFunction(SomeType Type, SomeOtherType OtherType) {}",
      NoBinPacking);
}

TEST_F(FormatTest, AdaptiveOnePerLineFormatting) {
  FormatStyle Style = getLLVMStyleWithColumns(15);
  Style.ExperimentalAutoDetectBinPacking = true;
  EXPECT_EQ("aaa(aaaa,\n"
            "    aaaa,\n"
            "    aaaa);\n"
            "aaa(aaaa,\n"
            "    aaaa,\n"
            "    aaaa);",
            format("aaa(aaaa,\n" // one-per-line
                   "  aaaa,\n"
                   "    aaaa  );\n"
                   "aaa(aaaa,  aaaa,  aaaa);", // inconclusive
                   Style));
  EXPECT_EQ("aaa(aaaa, aaaa,\n"
            "    aaaa);\n"
            "aaa(aaaa, aaaa,\n"
            "    aaaa);",
            format("aaa(aaaa,  aaaa,\n" // bin-packed
                   "    aaaa  );\n"
                   "aaa(aaaa,  aaaa,  aaaa);", // inconclusive
                   Style));
}

TEST_F(FormatTest, FormatsBuilderPattern) {
  verifyFormat("return llvm::StringSwitch<Reference::Kind>(name)\n"
               "    .StartsWith(\".eh_frame_hdr\", ORDER_EH_FRAMEHDR)\n"
               "    .StartsWith(\".eh_frame\", ORDER_EH_FRAME)\n"
               "    .StartsWith(\".init\", ORDER_INIT)\n"
               "    .StartsWith(\".fini\", ORDER_FINI)\n"
               "    .StartsWith(\".hash\", ORDER_HASH)\n"
               "    .Default(ORDER_TEXT);\n");

  verifyFormat("return aaaaaaaaaaaaaaaaa->aaaaa().aaaaaaaaaaaaa().aaaaaa() <\n"
               "       aaaaaaaaaaaaaaa->aaaaa().aaaaaaaaaaaaa().aaaaaa();");
  verifyFormat(
      "aaaaaaa->aaaaaaa\n"
      "    ->aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
      "    ->aaaaaaaa(aaaaaaaaaaaaaaa);");
  verifyFormat(
      "aaaaaaa->aaaaaaa\n"
      "    ->aaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
      "    ->aaaaaaaa(aaaaaaaaaaaaaaa);");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaa()->aaaaaa(bbbbb)->aaaaaaaaaaaaaaaaaaa( // break\n"
      "    aaaaaaaaaaaaaa);");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaa *aaaaaaaaa =\n"
      "    aaaaaa->aaaaaaaaaaaa()\n"
      "        ->aaaaaaaaaaaaaaaa(\n"
      "            aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
      "        ->aaaaaaaaaaaaaaaaa();");
  verifyGoogleFormat(
      "void f() {\n"
      "  someo->Add((new util::filetools::Handler(dir))\n"
      "                 ->OnEvent1(NewPermanentCallback(\n"
      "                     this, &HandlerHolderClass::EventHandlerCBA))\n"
      "                 ->OnEvent2(NewPermanentCallback(\n"
      "                     this, &HandlerHolderClass::EventHandlerCBB))\n"
      "                 ->OnEvent3(NewPermanentCallback(\n"
      "                     this, &HandlerHolderClass::EventHandlerCBC))\n"
      "                 ->OnEvent5(NewPermanentCallback(\n"
      "                     this, &HandlerHolderClass::EventHandlerCBD))\n"
      "                 ->OnEvent6(NewPermanentCallback(\n"
      "                     this, &HandlerHolderClass::EventHandlerCBE)));\n"
      "}");

  verifyFormat(
      "aaaaaaaaaaa().aaaaaaaaaaa().aaaaaaaaaaa().aaaaaaaaaaa().aaaaaaaaaaa();");
  verifyFormat("aaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaa();");
  verifyFormat("aaaaaaaaaaaaaaa.aaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaa();");
  verifyFormat("aaaaaaaaaaaaaaa.aaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaa.aaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaa();");
  verifyFormat("aaaaaaaaaaaaa->aaaaaaaaaaaaaaaaaaaaaaaa()\n"
               "    ->aaaaaaaaaaaaaae(0)\n"
               "    ->aaaaaaaaaaaaaaa();");

  // Don't linewrap after very short segments.
  verifyFormat("a().aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa();");
  verifyFormat("aa().aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa();");
  verifyFormat("aaa()\n"
               "    .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa();");

  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaaaaaaaaaaaaa()\n"
               "    .has<bbbbbbbbbbbbbbbbbbbbb>();");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaaaaaaa()\n"
               "    .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa<\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa>();");

  // Prefer not to break after empty parentheses.
  verifyFormat("FirstToken->WhitespaceRange.getBegin().getLocWithOffset(\n"
               "    First->LastNewlineOffset);");

  // Prefer not to create "hanging" indents.
  verifyFormat(
      "return !soooooooooooooome_map\n"
      "            .insert(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
      "            .second;");
  verifyFormat(
      "return aaaaaaaaaaaaaaaa\n"
      "    .aaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaa)\n"
      "    .aaaa(aaaaaaaaaaaaaa);");
  // No hanging indent here.
  verifyFormat("aaaaaaaaaaaaaaaa.aaaaaaaaaaaaaa.aaaaaaaaaaaaaaa(\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("aaaaaaaaaaaaaaaa.aaaaaaaaaaaaaa().aaaaaaaaaaaaaaa(\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("aaaaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaa)\n"
               "    .aaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
               getLLVMStyleWithColumns(60));
  verifyFormat("aaaaaaaaaaaaaaaaaa\n"
               "    .aaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaa)\n"
               "    .aaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
               getLLVMStyleWithColumns(59));
  verifyFormat("aaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "    .aaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
}

TEST_F(FormatTest, BreaksAccordingToOperatorPrecedence) {
  verifyFormat(
      "if (aaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
      "    bbbbbbbbbbbbbbbbbbbbbbbbb && ccccccccccccccccccccccccc) {\n}");
  verifyFormat(
      "if (aaaaaaaaaaaaaaaaaaaaaaaaa or\n"
      "    bbbbbbbbbbbbbbbbbbbbbbbbb and cccccccccccccccccccccccc) {\n}");

  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaa && bbbbbbbbbbbbbbbbbbbbbbbbb ||\n"
               "    ccccccccccccccccccccccccc) {\n}");
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaa and bbbbbbbbbbbbbbbbbbbbbbbb or\n"
               "    ccccccccccccccccccccccccc) {\n}");

  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaa || bbbbbbbbbbbbbbbbbbbbbbbbb ||\n"
               "    ccccccccccccccccccccccccc) {\n}");
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaa or bbbbbbbbbbbbbbbbbbbbbbbbb or\n"
               "    ccccccccccccccccccccccccc) {\n}");

  verifyFormat(
      "if ((aaaaaaaaaaaaaaaaaaaaaaaaa || bbbbbbbbbbbbbbbbbbbbbbbbb) &&\n"
      "    ccccccccccccccccccccccccc) {\n}");
  verifyFormat(
      "if ((aaaaaaaaaaaaaaaaaaaaaaaaa or bbbbbbbbbbbbbbbbbbbbbbbbb) and\n"
      "    ccccccccccccccccccccccccc) {\n}");

  verifyFormat("return aaaa & AAAAAAAAAAAAAAAAAAAAAAAAAAAAA ||\n"
               "       bbbb & BBBBBBBBBBBBBBBBBBBBBBBBBBBBB ||\n"
               "       cccc & CCCCCCCCCCCCCCCCCCCCCCCCCC ||\n"
               "       dddd & DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD;");
  verifyFormat("return aaaa & AAAAAAAAAAAAAAAAAAAAAAAAAAAAA or\n"
               "       bbbb & BBBBBBBBBBBBBBBBBBBBBBBBBBBBB or\n"
               "       cccc & CCCCCCCCCCCCCCCCCCCCCCCCCC or\n"
               "       dddd & DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD;");

  verifyFormat("if ((aaaaaaaaaa != aaaaaaaaaaaaaaa ||\n"
               "     aaaaaaaaaaaaaaaaaaaaaaaa() >= aaaaaaaaaaaaaaaaaaaa) &&\n"
               "    aaaaaaaaaaaaaaa != aa) {\n}");
  verifyFormat("if ((aaaaaaaaaa != aaaaaaaaaaaaaaa or\n"
               "     aaaaaaaaaaaaaaaaaaaaaaaa() >= aaaaaaaaaaaaaaaaaaaa) and\n"
               "    aaaaaaaaaaaaaaa != aa) {\n}");
}

TEST_F(FormatTest, BreaksAfterAssignments) {
  verifyFormat(
      "unsigned Cost =\n"
      "    TTI.getMemoryOpCost(I->getOpcode(), VectorTy, SI->getAlignment(),\n"
      "                        SI->getPointerAddressSpaceee());\n");
  verifyFormat(
      "CharSourceRange LineRange = CharSourceRange::getTokenRange(\n"
      "    Line.Tokens.front().Tok.getLo(), Line.Tokens.back().Tok.getLoc());");

  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaa aaaa = aaaaaaaaaaaaaa(0).aaaa().aaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaa::aaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("unsigned OriginalStartColumn =\n"
               "    SourceMgr.getSpellingColumnNumber(\n"
               "        Current.FormatTok.getStartOfNonWhitespace()) -\n"
               "    1;");
}

TEST_F(FormatTest, AlignsAfterAssignments) {
  verifyFormat(
      "int Result = aaaaaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaa +\n"
      "             aaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat(
      "Result += aaaaaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaa +\n"
      "          aaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat(
      "Result >>= aaaaaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaa +\n"
      "           aaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat(
      "int Result = (aaaaaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaa +\n"
      "              aaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat(
      "double LooooooooooooooooooooooooongResult = aaaaaaaaaaaaaaaaaaaaaaaa +\n"
      "                                            aaaaaaaaaaaaaaaaaaaaaaaa +\n"
      "                                            aaaaaaaaaaaaaaaaaaaaaaaa;");
}

TEST_F(FormatTest, AlignsAfterReturn) {
  verifyFormat(
      "return aaaaaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaa +\n"
      "       aaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat(
      "return (aaaaaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaa +\n"
      "        aaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat(
      "return aaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa >=\n"
      "       aaaaaaaaaaaaaaaaaaaaaa();");
  verifyFormat(
      "return (aaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa >=\n"
      "        aaaaaaaaaaaaaaaaaaaaaa());");
  verifyFormat("return aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("return aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) &&\n"
               "       aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat("return\n"
               "    // true if code is one of a or b.\n"
               "    code == a || code == b;");
}

TEST_F(FormatTest, AlignsAfterOpenBracket) {
  verifyFormat(
      "void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaa aaaaaaaa,\n"
      "                                                aaaaaaaaa aaaaaaa) {}");
  verifyFormat(
      "SomeLongVariableName->someVeryLongFunctionName(aaaaaaaaaaa aaaaaaaaa,\n"
      "                                               aaaaaaaaaaa aaaaaaaaa);");
  verifyFormat(
      "SomeLongVariableName->someFunction(foooooooo(aaaaaaaaaaaaaaa,\n"
      "                                             aaaaaaaaaaaaaaaaaaaaa));");
  FormatStyle Style = getLLVMStyle();
  Style.AlignAfterOpenBracket = FormatStyle::BAS_DontAlign;
  verifyFormat("void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    aaaaaaaaaaa aaaaaaaa, aaaaaaaaa aaaaaaa) {}",
               Style);
  verifyFormat("SomeLongVariableName->someVeryLongFunctionName(\n"
               "    aaaaaaaaaaa aaaaaaaaa, aaaaaaaaaaa aaaaaaaaa);",
               Style);
  verifyFormat("SomeLongVariableName->someFunction(\n"
               "    foooooooo(aaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaa));",
               Style);
  verifyFormat(
      "void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaa aaaaaaaa,\n"
      "    aaaaaaaaa aaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}",
      Style);
  verifyFormat(
      "SomeLongVariableName->someVeryLongFunctionName(aaaaaaaaaaa aaaaaaaaa,\n"
      "    aaaaaaaaaaa aaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
      Style);
  verifyFormat(
      "SomeLongVariableName->someFunction(foooooooo(aaaaaaaaaaaaaaa,\n"
      "    aaaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa));",
      Style);

  verifyFormat("bbbbbbbbbbbb(aaaaaaaaaaaaaaaaaaaaaaaa, //\n"
               "    ccccccc(aaaaaaaaaaaaaaaaa,         //\n"
               "        b));",
               Style);

  Style.AlignAfterOpenBracket = FormatStyle::BAS_AlwaysBreak;
  Style.BinPackArguments = false;
  Style.BinPackParameters = false;
  verifyFormat("void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    aaaaaaaaaaa aaaaaaaa,\n"
               "    aaaaaaaaa aaaaaaa,\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {}",
               Style);
  verifyFormat("SomeLongVariableName->someVeryLongFunctionName(\n"
               "    aaaaaaaaaaa aaaaaaaaa,\n"
               "    aaaaaaaaaaa aaaaaaaaa,\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
               Style);
  verifyFormat("SomeLongVariableName->someFunction(foooooooo(\n"
               "    aaaaaaaaaaaaaaa,\n"
               "    aaaaaaaaaaaaaaaaaaaaa,\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa));",
               Style);
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaa)));",
      Style);
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaa.aaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaa)));",
      Style);
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaaa(\n"
      "        aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaa)),\n"
      "    aaaaaaaaaaaaaaaa);",
      Style);
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaaa(\n"
      "        aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaa)) &&\n"
      "    aaaaaaaaaaaaaaaa);",
      Style);
}

TEST_F(FormatTest, ParenthesesAndOperandAlignment) {
  FormatStyle Style = getLLVMStyleWithColumns(40);
  verifyFormat("int a = f(aaaaaaaaaaaaaaaaaaaaaa &&\n"
               "          bbbbbbbbbbbbbbbbbbbbbb);",
               Style);
  Style.AlignAfterOpenBracket = FormatStyle::BAS_Align;
  Style.AlignOperands = false;
  verifyFormat("int a = f(aaaaaaaaaaaaaaaaaaaaaa &&\n"
               "          bbbbbbbbbbbbbbbbbbbbbb);",
               Style);
  Style.AlignAfterOpenBracket = FormatStyle::BAS_DontAlign;
  Style.AlignOperands = true;
  verifyFormat("int a = f(aaaaaaaaaaaaaaaaaaaaaa &&\n"
               "          bbbbbbbbbbbbbbbbbbbbbb);",
               Style);
  Style.AlignAfterOpenBracket = FormatStyle::BAS_DontAlign;
  Style.AlignOperands = false;
  verifyFormat("int a = f(aaaaaaaaaaaaaaaaaaaaaa &&\n"
               "    bbbbbbbbbbbbbbbbbbbbbb);",
               Style);
}

TEST_F(FormatTest, BreaksConditionalExpressions) {
  verifyFormat(
      "aaaa(aaaaaaaaaaaaaaaaaaaa,\n"
      "     aaaaaaaaaaaaaaaaaaaaaaaaaa ? aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                                : aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat(
      "aaaa(aaaaaaaaaaaaaaaaaaaa,\n"
      "     aaaaaaa ? aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "             : aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaa ? aaaa(aaaaaa)\n"
      "                                                    : aaaaaaaaaaaaa);");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                   aaaaaaaaaaaaaaaa ? aaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                                    : aaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                   aaaaaaaaaaaaa);");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                   aaaaaaaaaaaaaaaa ?: aaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                   aaaaaaaaaaaaa);");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    ? aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "          aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "    : aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "          aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("aaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "       aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "           ? aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "           : aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa),\n"
               "       aaaaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("aaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "       aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "           ?: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "                  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa),\n"
               "       aaaaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    ? aaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    : aaaaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaa =\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        ? aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        : aaaaaaaaaaaaaaaa;");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa == aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "    ? aaaaaaaaaaaaaaa\n"
      "    : aaaaaaaaaaaaaaa;");
  verifyFormat("f(aaaaaaaaaaaaaaaa == // force break\n"
               "          aaaaaaaaa\n"
               "      ? b\n"
               "      : c);");
  verifyFormat("return aaaa == bbbb\n"
               "           // comment\n"
               "           ? aaaa\n"
               "           : bbbb;");
  verifyFormat("unsigned Indent =\n"
               "    format(TheLine.First,\n"
               "           IndentForLevel[TheLine.Level] >= 0\n"
               "               ? IndentForLevel[TheLine.Level]\n"
               "               : TheLine * 2,\n"
               "           TheLine.InPPDirective, PreviousEndOfLineColumn);",
               getLLVMStyleWithColumns(60));
  verifyFormat("bool aaaaaa = aaaaaaaaaaaaa //\n"
               "                  ? aaaaaaaaaaaaaaa\n"
               "                  : bbbbbbbbbbbbbbb //\n"
               "                        ? ccccccccccccccc\n"
               "                        : ddddddddddddddd;");
  verifyFormat("bool aaaaaa = aaaaaaaaaaaaa //\n"
               "                  ? aaaaaaaaaaaaaaa\n"
               "                  : (bbbbbbbbbbbbbbb //\n"
               "                         ? ccccccccccccccc\n"
               "                         : ddddddddddddddd);");
  verifyFormat(
      "int aaaaaaaaaaaaaaaaaaaaaaaaaaa = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                                      ? aaaaaaaaaaaaaaaaaaaaaaaaa +\n"
      "                                            aaaaaaaaaaaaaaaaaaaaa +\n"
      "                                            aaaaaaaaaaaaaaaaaaaaa\n"
      "                                      : aaaaaaaaaa;");
  verifyFormat(
      "aaaaaa = aaaaaaaaaaaa ? aaaaaaaaaa ? aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                                   : aaaaaaaaaaaaaaaaaaaaaa\n"
      "                      : aaaaaaaaaaaaaaaaaaaaaaaaaaaa;");

  FormatStyle NoBinPacking = getLLVMStyle();
  NoBinPacking.BinPackArguments = false;
  verifyFormat(
      "void f() {\n"
      "  g(aaa,\n"
      "    aaaaaaaaaa == aaaaaaaaaa ? aaaa : aaaaa,\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa == aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "        ? aaaaaaaaaaaaaaa\n"
      "        : aaaaaaaaaaaaaaa);\n"
      "}",
      NoBinPacking);
  verifyFormat(
      "void f() {\n"
      "  g(aaa,\n"
      "    aaaaaaaaaa == aaaaaaaaaa ? aaaa : aaaaa,\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa == aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "        ?: aaaaaaaaaaaaaaa);\n"
      "}",
      NoBinPacking);

  verifyFormat("SomeFunction(aaaaaaaaaaaaaaaaa,\n"
               "             // comment.\n"
               "             ccccccccccccccccccccccccccccccccccccccc\n"
               "                 ? aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "                 : bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb);");

  // Assignments in conditional expressions. Apparently not uncommon :-(.
  verifyFormat("return a != b\n"
               "           // comment\n"
               "           ? a = b\n"
               "           : a = b;");
  verifyFormat("return a != b\n"
               "           // comment\n"
               "           ? a = a != b\n"
               "                     // comment\n"
               "                     ? a = b\n"
               "                     : a\n"
               "           : a;\n");
  verifyFormat("return a != b\n"
               "           // comment\n"
               "           ? a\n"
               "           : a = a != b\n"
               "                     // comment\n"
               "                     ? a = b\n"
               "                     : a;");
}

TEST_F(FormatTest, BreaksConditionalExpressionsAfterOperator) {
  FormatStyle Style = getLLVMStyle();
  Style.BreakBeforeTernaryOperators = false;
  Style.ColumnLimit = 70;
  verifyFormat(
      "aaaa(aaaaaaaaaaaaaaaaaaaa,\n"
      "     aaaaaaaaaaaaaaaaaaaaaaaaaa ? aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa :\n"
      "                                  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
      Style);
  verifyFormat(
      "aaaa(aaaaaaaaaaaaaaaaaaaa,\n"
      "     aaaaaaa ? aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa :\n"
      "               aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
      Style);
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaa ? aaaa(aaaaaa) :\n"
      "                                                      aaaaaaaaaaaaa);",
      Style);
  verifyFormat(
      "aaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                   aaaaaaaaaaaaaaaa ? aaaaaaaaaaaaaaaaaaaaaaaaaaaaa :\n"
      "                                      aaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                   aaaaaaaaaaaaa);",
      Style);
  verifyFormat(
      "aaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                   aaaaaaaaaaaaaaaa ?: aaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                   aaaaaaaaaaaaa);",
      Style);
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ?\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) :\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
               Style);
  verifyFormat("aaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "       aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ?\n"
               "           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "               aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) :\n"
               "           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "               aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa),\n"
               "       aaaaaaaaaaaaaaaaaaaaaaaaaaa);",
               Style);
  verifyFormat("aaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "       aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ?:\n"
               "           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "               aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa),\n"
               "       aaaaaaaaaaaaaaaaaaaaaaaaaaa);",
               Style);
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ?\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaa :\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaa;",
               Style);
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaa =\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ?\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa :\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;",
               Style);
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa == aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ?\n"
      "    aaaaaaaaaaaaaaa :\n"
      "    aaaaaaaaaaaaaaa;",
      Style);
  verifyFormat("f(aaaaaaaaaaaaaaaa == // force break\n"
               "          aaaaaaaaa ?\n"
               "      b :\n"
               "      c);",
               Style);
  verifyFormat("unsigned Indent =\n"
               "    format(TheLine.First,\n"
               "           IndentForLevel[TheLine.Level] >= 0 ?\n"
               "               IndentForLevel[TheLine.Level] :\n"
               "               TheLine * 2,\n"
               "           TheLine.InPPDirective, PreviousEndOfLineColumn);",
               Style);
  verifyFormat("bool aaaaaa = aaaaaaaaaaaaa ? //\n"
               "                  aaaaaaaaaaaaaaa :\n"
               "                  bbbbbbbbbbbbbbb ? //\n"
               "                      ccccccccccccccc :\n"
               "                      ddddddddddddddd;",
               Style);
  verifyFormat("bool aaaaaa = aaaaaaaaaaaaa ? //\n"
               "                  aaaaaaaaaaaaaaa :\n"
               "                  (bbbbbbbbbbbbbbb ? //\n"
               "                       ccccccccccccccc :\n"
               "                       ddddddddddddddd);",
               Style);
  verifyFormat("int i = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ?\n"
               "            /*bbbbbbbbbbbbbbb=*/bbbbbbbbbbbbbbbbbbbbbbbbb :\n"
               "            ccccccccccccccccccccccccccc;",
               Style);
  verifyFormat("return aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ?\n"
               "           aaaaa :\n"
               "           bbbbbbbbbbbbbbb + cccccccccccccccc;",
               Style);
}

TEST_F(FormatTest, DeclarationsOfMultipleVariables) {
  verifyFormat("bool aaaaaaaaaaaaaaaaa = aaaaaa->aaaaaaaaaaaaaaaaa(),\n"
               "     aaaaaaaaaaa = aaaaaa->aaaaaaaaaaa();");
  verifyFormat("bool a = true, b = false;");

  verifyFormat("bool aaaaaaaaaaaaaaaaaaaaaaaaa =\n"
               "         aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaa),\n"
               "     bbbbbbbbbbbbbbbbbbbbbbbbb =\n"
               "         bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb(bbbbbbbbbbbbbbbb);");
  verifyFormat(
      "bool aaaaaaaaaaaaaaaaaaaaa =\n"
      "         bbbbbbbbbbbbbbbbbbbbbbbbbbbb && cccccccccccccccccccccccccccc,\n"
      "     d = e && f;");
  verifyFormat("aaaaaaaaa a = aaaaaaaaaaaaaaaaaaaa, b = bbbbbbbbbbbbbbbbbbbb,\n"
               "          c = cccccccccccccccccccc, d = dddddddddddddddddddd;");
  verifyFormat("aaaaaaaaa *a = aaaaaaaaaaaaaaaaaaa, *b = bbbbbbbbbbbbbbbbbbb,\n"
               "          *c = ccccccccccccccccccc, *d = ddddddddddddddddddd;");
  verifyFormat("aaaaaaaaa ***a = aaaaaaaaaaaaaaaaaaa, ***b = bbbbbbbbbbbbbbb,\n"
               "          ***c = ccccccccccccccccccc, ***d = ddddddddddddddd;");

  FormatStyle Style = getGoogleStyle();
  Style.PointerAlignment = FormatStyle::PAS_Left;
  Style.DerivePointerAlignment = false;
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    *aaaaaaaaaaaaaaaaaaaaaaaaaaaaa = aaaaaaaaaaaaaaaaaaa,\n"
               "    *b = bbbbbbbbbbbbbbbbbbb;",
               Style);
  verifyFormat("aaaaaaaaa *a = aaaaaaaaaaaaaaaaaaa, *b = bbbbbbbbbbbbbbbbbbb,\n"
               "          *b = bbbbbbbbbbbbbbbbbbb, *d = ddddddddddddddddddd;",
               Style);
  verifyFormat("vector<int*> a, b;", Style);
  verifyFormat("for (int *p, *q; p != q; p = p->next) {\n}", Style);
}

TEST_F(FormatTest, ConditionalExpressionsInBrackets) {
  verifyFormat("arr[foo ? bar : baz];");
  verifyFormat("f()[foo ? bar : baz];");
  verifyFormat("(a + b)[foo ? bar : baz];");
  verifyFormat("arr[foo ? (4 > 5 ? 4 : 5) : 5 < 5 ? 5 : 7];");
}

TEST_F(FormatTest, AlignsStringLiterals) {
  verifyFormat("loooooooooooooooooooooooooongFunction(\"short literal \"\n"
               "                                      \"short literal\");");
  verifyFormat(
      "looooooooooooooooooooooooongFunction(\n"
      "    \"short literal\"\n"
      "    \"looooooooooooooooooooooooooooooooooooooooooooooooong literal\");");
  verifyFormat("someFunction(\"Always break between multi-line\"\n"
               "             \" string literals\",\n"
               "             and, other, parameters);");
  EXPECT_EQ("fun +\n"
            "    \"1243\" /* comment */\n"
            "    \"5678\";",
            format("fun + \"1243\" /* comment */\n"
                   "    \"5678\";",
                   getLLVMStyleWithColumns(28)));
  EXPECT_EQ(
      "aaaaaa = \"aaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaa \"\n"
      "         \"aaaaaaaaaaaaaaaaaaaaa\"\n"
      "         \"aaaaaaaaaaaaaaaa\";",
      format("aaaaaa ="
             "\"aaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaa "
             "aaaaaaaaaaaaaaaaaaaaa\" "
             "\"aaaaaaaaaaaaaaaa\";"));
  verifyFormat("a = a +\n"
               "    \"a\"\n"
               "    \"a\"\n"
               "    \"a\";");
  verifyFormat("f(\"a\",\n"
               "  \"b\"\n"
               "  \"c\");");

  verifyFormat(
      "#define LL_FORMAT \"ll\"\n"
      "printf(\"aaaaa: %d, bbbbbb: %\" LL_FORMAT \"d, cccccccc: %\" LL_FORMAT\n"
      "       \"d, ddddddddd: %\" LL_FORMAT \"d\");");

  verifyFormat("#define A(X)          \\\n"
               "  \"aaaaa\" #X \"bbbbbb\" \\\n"
               "  \"ccccc\"",
               getLLVMStyleWithColumns(23));
  verifyFormat("#define A \"def\"\n"
               "f(\"abc\" A \"ghi\"\n"
               "  \"jkl\");");

  verifyFormat("f(L\"a\"\n"
               "  L\"b\");");
  verifyFormat("#define A(X)            \\\n"
               "  L\"aaaaa\" #X L\"bbbbbb\" \\\n"
               "  L\"ccccc\"",
               getLLVMStyleWithColumns(25));

  verifyFormat("f(@\"a\"\n"
               "  @\"b\");");
  verifyFormat("NSString s = @\"a\"\n"
               "             @\"b\"\n"
               "             @\"c\";");
  verifyFormat("NSString s = @\"a\"\n"
               "              \"b\"\n"
               "              \"c\";");
}

TEST_F(FormatTest, ReturnTypeBreakingStyle) {
  FormatStyle Style = getLLVMStyle();
  // No declarations or definitions should be moved to own line.
  Style.AlwaysBreakAfterReturnType = FormatStyle::RTBS_None;
  verifyFormat("class A {\n"
               "  int f() { return 1; }\n"
               "  int g();\n"
               "};\n"
               "int f() { return 1; }\n"
               "int g();\n",
               Style);

  // All declarations and definitions should have the return type moved to its
  // own
  // line.
  Style.AlwaysBreakAfterReturnType = FormatStyle::RTBS_All;
  verifyFormat("class E {\n"
               "  int\n"
               "  f() {\n"
               "    return 1;\n"
               "  }\n"
               "  int\n"
               "  g();\n"
               "};\n"
               "int\n"
               "f() {\n"
               "  return 1;\n"
               "}\n"
               "int\n"
               "g();\n",
               Style);

  // Top-level definitions, and no kinds of declarations should have the
  // return type moved to its own line.
  Style.AlwaysBreakAfterReturnType = FormatStyle::RTBS_TopLevelDefinitions;
  verifyFormat("class B {\n"
               "  int f() { return 1; }\n"
               "  int g();\n"
               "};\n"
               "int\n"
               "f() {\n"
               "  return 1;\n"
               "}\n"
               "int g();\n",
               Style);

  // Top-level definitions and declarations should have the return type moved
  // to its own line.
  Style.AlwaysBreakAfterReturnType = FormatStyle::RTBS_TopLevel;
  verifyFormat("class C {\n"
               "  int f() { return 1; }\n"
               "  int g();\n"
               "};\n"
               "int\n"
               "f() {\n"
               "  return 1;\n"
               "}\n"
               "int\n"
               "g();\n",
               Style);

  // All definitions should have the return type moved to its own line, but no
  // kinds of declarations.
  Style.AlwaysBreakAfterReturnType = FormatStyle::RTBS_AllDefinitions;
  verifyFormat("class D {\n"
               "  int\n"
               "  f() {\n"
               "    return 1;\n"
               "  }\n"
               "  int g();\n"
               "};\n"
               "int\n"
               "f() {\n"
               "  return 1;\n"
               "}\n"
               "int g();\n",
               Style);
  verifyFormat("const char *\n"
               "f(void) {\n" // Break here.
               "  return \"\";\n"
               "}\n"
               "const char *bar(void);\n", // No break here.
               Style);
  verifyFormat("template <class T>\n"
               "T *\n"
               "f(T &c) {\n" // Break here.
               "  return NULL;\n"
               "}\n"
               "template <class T> T *f(T &c);\n", // No break here.
               Style);
  verifyFormat("class C {\n"
               "  int\n"
               "  operator+() {\n"
               "    return 1;\n"
               "  }\n"
               "  int\n"
               "  operator()() {\n"
               "    return 1;\n"
               "  }\n"
               "};\n",
               Style);
  verifyFormat("void\n"
               "A::operator()() {}\n"
               "void\n"
               "A::operator>>() {}\n"
               "void\n"
               "A::operator+() {}\n",
               Style);
  verifyFormat("void *operator new(std::size_t s);", // No break here.
               Style);
  verifyFormat("void *\n"
               "operator new(std::size_t s) {}",
               Style);
  verifyFormat("void *\n"
               "operator delete[](void *ptr) {}",
               Style);
  Style.BreakBeforeBraces = FormatStyle::BS_Stroustrup;
  verifyFormat("const char *\n"
               "f(void)\n" // Break here.
               "{\n"
               "  return \"\";\n"
               "}\n"
               "const char *bar(void);\n", // No break here.
               Style);
  verifyFormat("template <class T>\n"
               "T *\n"     // Problem here: no line break
               "f(T &c)\n" // Break here.
               "{\n"
               "  return NULL;\n"
               "}\n"
               "template <class T> T *f(T &c);\n", // No break here.
               Style);
}

TEST_F(FormatTest, AlwaysBreakBeforeMultilineStrings) {
  FormatStyle NoBreak = getLLVMStyle();
  NoBreak.AlwaysBreakBeforeMultilineStrings = false;
  FormatStyle Break = getLLVMStyle();
  Break.AlwaysBreakBeforeMultilineStrings = true;
  verifyFormat("aaaa = \"bbbb\"\n"
               "       \"cccc\";",
               NoBreak);
  verifyFormat("aaaa =\n"
               "    \"bbbb\"\n"
               "    \"cccc\";",
               Break);
  verifyFormat("aaaa(\"bbbb\"\n"
               "     \"cccc\");",
               NoBreak);
  verifyFormat("aaaa(\n"
               "    \"bbbb\"\n"
               "    \"cccc\");",
               Break);
  verifyFormat("aaaa(qqq,\n"
               "     \"bbbb\"\n"
               "     \"cccc\");",
               NoBreak);
  verifyFormat("aaaa(qqq,\n"
               "     \"bbbb\"\n"
               "     \"cccc\");",
               Break);
  verifyFormat("aaaa(qqq,\n"
               "     L\"bbbb\"\n"
               "     L\"cccc\");",
               Break);
  verifyFormat("aaaaa(aaaaaa,\n"
               "      aaaaaaa(\"aaaa\"\n"
               "              \"bbbb\"));",
               Break);
  verifyFormat("string s = someFunction(\n"
               "    \"abc\"\n"
               "    \"abc\");",
               Break);

  // As we break before unary operators, breaking right after them is bad.
  verifyFormat("string foo = abc ? \"x\"\n"
               "                   \"blah blah blah blah blah blah\"\n"
               "                 : \"y\";",
               Break);

  // Don't break if there is no column gain.
  verifyFormat("f(\"aaaa\"\n"
               "  \"bbbb\");",
               Break);

  // Treat literals with escaped newlines like multi-line string literals.
  EXPECT_EQ("x = \"a\\\n"
            "b\\\n"
            "c\";",
            format("x = \"a\\\n"
                   "b\\\n"
                   "c\";",
                   NoBreak));
  EXPECT_EQ("xxxx =\n"
            "    \"a\\\n"
            "b\\\n"
            "c\";",
            format("xxxx = \"a\\\n"
                   "b\\\n"
                   "c\";",
                   Break));

  // Exempt ObjC strings for now.
  EXPECT_EQ("NSString *const kString = @\"aaaa\"\n"
            "                          @\"bbbb\";",
            format("NSString *const kString = @\"aaaa\"\n"
                   "@\"bbbb\";",
                   Break));

  Break.ColumnLimit = 0;
  verifyFormat("const char *hello = \"hello llvm\";", Break);
}

TEST_F(FormatTest, AlignsPipes) {
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "    << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "    << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaa << aaaaaaaaaaaaaaaaaaaa << aaaaaaaaaaaaaaaaaaaa\n"
      "                     << aaaaaaaaaaaaaaaaaaaa;");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa << aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                                 << aaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()\n"
      "    << aaaaaaaaaaaaaaaaaaaaaaaaaaaa << aaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat(
      "llvm::outs() << \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"\n"
      "                \"bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\"\n"
      "             << \"ccccccccccccccccccccccccccccccccccccccccccccccccc\";");
  verifyFormat(
      "aaaaaaaa << (aaaaaaaaaaaaaaaaaaa << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                                 << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
      "         << aaaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat("llvm::errs() << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "                    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "                    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "             << bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;");
  verifyFormat("llvm::errs() << \"aaaaaaaaaaaaaaaaaaaaaaa: \"\n"
               "             << aaaaaaaaaaaaaaaaa(aaaaaaaa, aaaaaaaaaaa);");
  verifyFormat(
      "llvm::errs() << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaaaaaa);");

  verifyFormat("llvm::outs() << \"aaaaaaaaaaaaaaaa: \"\n"
               "             << aaaaaaaa.aaaaaaaaaaaa(aaa)->aaaaaaaaaaaaaa();");
  verifyFormat("llvm::errs() << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "                    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "                    aaaaaaaaaaaaaaaaaaaaa)\n"
               "             << aaaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat("LOG_IF(aaa == //\n"
               "       bbb)\n"
               "    << a << b;");

  // But sometimes, breaking before the first "<<" is desirable.
  verifyFormat("Diag(aaaaaaaaaaaaaaaaaaaa, aaaaaaaa)\n"
               "    << aaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaa);");
  verifyFormat("Diag(aaaaaaaaaaaaaaaaaaaaaaaaaaaaa, bbbbbbbbb)\n"
               "    << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat("SemaRef.Diag(Loc, diag::note_for_range_begin_end)\n"
               "    << BEF << IsTemplate << Description << E->getType();");
  verifyFormat("Diag(aaaaaaaaaaaaaaaaaaaa, aaaaaaaa)\n"
               "    << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("Diag(aaaaaaaaaaaaaaaaaaaa, aaaaaaaa)\n"
               "    << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "    << aaa;");

  verifyFormat(
      "llvm::errs() << aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "                    .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa();");

  // Incomplete string literal.
  EXPECT_EQ("llvm::errs() << \"\n"
            "             << a;",
            format("llvm::errs() << \"\n<<a;"));

  verifyFormat("void f() {\n"
               "  CHECK_EQ(aaaa, (*bbbbbbbbb)->cccccc)\n"
               "      << \"qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq\";\n"
               "}");

  // Handle 'endl'.
  verifyFormat("llvm::errs() << aaaaaaaaaaaaaaaaaaaaaa << endl\n"
               "             << bbbbbbbbbbbbbbbbbbbbbb << endl;");
  verifyFormat("llvm::errs() << endl << bbbbbbbbbbbbbbbbbbbbbb << endl;");

  // Handle '\n'.
  verifyFormat("llvm::errs() << aaaaaaaaaaaaaaaaaaaaaa << \"\\n\"\n"
               "             << bbbbbbbbbbbbbbbbbbbbbb << \"\\n\";");
  verifyFormat("llvm::errs() << aaaaaaaaaaaaaaaaaaaaaa << \'\\n\'\n"
               "             << bbbbbbbbbbbbbbbbbbbbbb << \'\\n\';");
  verifyFormat("llvm::errs() << aaaa << \"aaaaaaaaaaaaaaaaaa\\n\"\n"
               "             << bbbb << \"bbbbbbbbbbbbbbbbbb\\n\";");
  verifyFormat("llvm::errs() << \"\\n\" << bbbbbbbbbbbbbbbbbbbbbb << \"\\n\";");
}

TEST_F(FormatTest, KeepStringLabelValuePairsOnALine) {
  verifyFormat("return out << \"somepacket = {\\n\"\n"
               "           << \" aaaaaa = \" << pkt.aaaaaa << \"\\n\"\n"
               "           << \" bbbb = \" << pkt.bbbb << \"\\n\"\n"
               "           << \" cccccc = \" << pkt.cccccc << \"\\n\"\n"
               "           << \" ddd = [\" << pkt.ddd << \"]\\n\"\n"
               "           << \"}\";");

  verifyFormat("llvm::outs() << \"aaaaaaaaaaaaaaaa: \" << aaaaaaaaaaaaaaaa\n"
               "             << \"aaaaaaaaaaaaaaaa: \" << aaaaaaaaaaaaaaaa\n"
               "             << \"aaaaaaaaaaaaaaaa: \" << aaaaaaaaaaaaaaaa;");
  verifyFormat(
      "llvm::outs() << \"aaaaaaaaaaaaaaaaa = \" << aaaaaaaaaaaaaaaaa\n"
      "             << \"bbbbbbbbbbbbbbbbb = \" << bbbbbbbbbbbbbbbbb\n"
      "             << \"ccccccccccccccccc = \" << ccccccccccccccccc\n"
      "             << \"ddddddddddddddddd = \" << ddddddddddddddddd\n"
      "             << \"eeeeeeeeeeeeeeeee = \" << eeeeeeeeeeeeeeeee;");
  verifyFormat("llvm::outs() << aaaaaaaaaaaaaaaaaaaaaaaa << \"=\"\n"
               "             << bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;");
  verifyFormat(
      "void f() {\n"
      "  llvm::outs() << \"aaaaaaaaaaaaaaaaaaaa: \"\n"
      "               << aaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaa);\n"
      "}");

  // Breaking before the first "<<" is generally not desirable.
  verifyFormat(
      "llvm::errs()\n"
      "    << \"aaaaaaaaaaaaaaaaaaa: \" << aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "    << \"aaaaaaaaaaaaaaaaaaa: \" << aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "    << \"aaaaaaaaaaaaaaaaaaa: \" << aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "    << \"aaaaaaaaaaaaaaaaaaa: \" << aaaaaaaaaaaaaaaaaaaaaaaaaaaa;",
      getLLVMStyleWithColumns(70));
  verifyFormat("llvm::errs() << \"aaaaaaaaaaaaaaaaaaa: \"\n"
               "             << aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "             << \"aaaaaaaaaaaaaaaaaaa: \"\n"
               "             << aaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "             << \"aaaaaaaaaaaaaaaaaaa: \"\n"
               "             << aaaaaaaaaaaaaaaaaaaaaaaaaaaa;",
               getLLVMStyleWithColumns(70));

  verifyFormat("string v = \"aaaaaaaaaaaaaaaa: \" + aaaaaaaaaaaaaaaa +\n"
               "           \"aaaaaaaaaaaaaaaa: \" + aaaaaaaaaaaaaaaa +\n"
               "           \"aaaaaaaaaaaaaaaa: \" + aaaaaaaaaaaaaaaa;");
  verifyFormat("string v = StrCat(\"aaaaaaaaaaaaaaaa: \", aaaaaaaaaaaaaaaa,\n"
               "                  \"aaaaaaaaaaaaaaaa: \", aaaaaaaaaaaaaaaa,\n"
               "                  \"aaaaaaaaaaaaaaaa: \", aaaaaaaaaaaaaaaa);");
  verifyFormat("string v = \"aaaaaaaaaaaaaaaa: \" +\n"
               "           (aaaa + aaaa);",
               getLLVMStyleWithColumns(40));
  verifyFormat("string v = StrCat(\"aaaaaaaaaaaa: \" +\n"
               "                  (aaaaaaa + aaaaa));",
               getLLVMStyleWithColumns(40));
  verifyFormat(
      "string v = StrCat(\"aaaaaaaaaaaaaaaaaaaaaaaaaaa: \",\n"
      "                  SomeFunction(aaaaaaaaaaaa, aaaaaaaa.aaaaaaa),\n"
      "                  bbbbbbbbbbbbbbbbbbbbbbb);");
}

TEST_F(FormatTest, UnderstandsEquals) {
  verifyFormat(
      "aaaaaaaaaaaaaaaaa =\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat(
      "if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
      "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n}");
  verifyFormat(
      "if (a) {\n"
      "  f();\n"
      "} else if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
      "               aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n"
      "}");

  verifyFormat("if (int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
               "        100000000 + 10000000) {\n}");
}

TEST_F(FormatTest, WrapsAtFunctionCallsIfNecessary) {
  verifyFormat("LoooooooooooooooooooooooooooooooooooooongObject\n"
               "    .looooooooooooooooooooooooooooooooooooooongFunction();");

  verifyFormat("LoooooooooooooooooooooooooooooooooooooongObject\n"
               "    ->looooooooooooooooooooooooooooooooooooooongFunction();");

  verifyFormat(
      "LooooooooooooooooooooooooooooooooongObject->shortFunction(Parameter1,\n"
      "                                                          Parameter2);");

  verifyFormat(
      "ShortObject->shortFunction(\n"
      "    LooooooooooooooooooooooooooooooooooooooooooooooongParameter1,\n"
      "    LooooooooooooooooooooooooooooooooooooooooooooooongParameter2);");

  verifyFormat("loooooooooooooongFunction(\n"
               "    LoooooooooooooongObject->looooooooooooooooongFunction());");

  verifyFormat(
      "function(LoooooooooooooooooooooooooooooooooooongObject\n"
      "             ->loooooooooooooooooooooooooooooooooooooooongFunction());");

  verifyFormat("EXPECT_CALL(SomeObject, SomeFunction(Parameter))\n"
               "    .WillRepeatedly(Return(SomeValue));");
  verifyFormat("void f() {\n"
               "  EXPECT_CALL(SomeObject, SomeFunction(Parameter))\n"
               "      .Times(2)\n"
               "      .WillRepeatedly(Return(SomeValue));\n"
               "}");
  verifyFormat("SomeMap[std::pair(aaaaaaaaaaaa, bbbbbbbbbbbbbbb)].insert(\n"
               "    ccccccccccccccccccccccc);");
  verifyFormat("aaaaa(aaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "            aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "          .aaaaa(aaaaa),\n"
               "      aaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("void f() {\n"
               "  aaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "      aaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaa)->aaaaaaaaa());\n"
               "}");
  verifyFormat("aaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "    .aaaaaaaaaaaaaaa(aa(aaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "                        aaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "                        aaaaaaaaaaaaaaaaaaaaaaaaaaa));");
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()) {\n"
               "}");

  // Here, it is not necessary to wrap at "." or "->".
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaa) ||\n"
               "    aaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa) {\n}");
  verifyFormat(
      "aaaaaaaaaaa->aaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "    aaaaaaaaaaaaaaaaaa->aaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaa));\n");

  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa().aaaaaaaaaaaaaaaaa());");
  verifyFormat("a->aaaaaa()->aaaaaaaaaaa(aaaaaaaa()->aaaaaa()->aaaaa() *\n"
               "                         aaaaaaaaa()->aaaaaa()->aaaaa());");
  verifyFormat("a->aaaaaa()->aaaaaaaaaaa(aaaaaaaa()->aaaaaa()->aaaaa() ||\n"
               "                         aaaaaaaaa()->aaaaaa()->aaaaa());");

  verifyFormat("aaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "    .a();");

  FormatStyle NoBinPacking = getLLVMStyle();
  NoBinPacking.BinPackParameters = false;
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaa)\n"
               "    .aaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaa)\n"
               "    .aaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaa,\n"
               "                         aaaaaaaaaaaaaaaaaaa,\n"
               "                         aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
               NoBinPacking);

  // If there is a subsequent call, change to hanging indentation.
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "                         aaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaa))\n"
      "    .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa();");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaa));");
  verifyFormat("aaaaaaaaaa = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "                 .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa();");
  verifyFormat("aaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "               aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "               .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa());");
}

TEST_F(FormatTest, WrapsTemplateDeclarations) {
  verifyFormat("template <typename T>\n"
               "virtual void loooooooooooongFunction(int Param1, int Param2);");
  verifyFormat("template <typename T>\n"
               "// T should be one of {A, B}.\n"
               "virtual void loooooooooooongFunction(int Param1, int Param2);");
  verifyFormat(
      "template <typename T>\n"
      "using comment_to_xml_conversion = comment_to_xml_conversion<T, int>;");
  verifyFormat("template <typename T>\n"
               "void f(int Paaaaaaaaaaaaaaaaaaaaaaaaaaaaaaram1,\n"
               "       int Paaaaaaaaaaaaaaaaaaaaaaaaaaaaaaram2);");
  verifyFormat(
      "template <typename T>\n"
      "void looooooooooooooooooooongFunction(int Paaaaaaaaaaaaaaaaaaaaram1,\n"
      "                                      int Paaaaaaaaaaaaaaaaaaaaram2);");
  verifyFormat(
      "template <typename T>\n"
      "aaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaa,\n"
      "                    aaaaaaaaaaaaaaaaaaaaaaaaaa<T>::aaaaaaaaaa,\n"
      "                    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("template <typename T>\n"
               "void aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    int aaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat(
      "template <typename T1, typename T2 = char, typename T3 = char,\n"
      "          typename T4 = char>\n"
      "void f();");
  verifyFormat("template <typename aaaaaaaaaaa, typename bbbbbbbbbbbbb,\n"
               "          template <typename> class cccccccccccccccccccccc,\n"
               "          typename ddddddddddddd>\n"
               "class C {};");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaa<aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaa>(\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");

  verifyFormat("void f() {\n"
               "  a<aaaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaa>(\n"
               "      a(aaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaa));\n"
               "}");

  verifyFormat("template <typename T> class C {};");
  verifyFormat("template <typename T> void f();");
  verifyFormat("template <typename T> void f() {}");
  verifyFormat(
      "aaaaaaaaaaaaa<aaaaaaaaaa, aaaaaaaaaaa,\n"
      "              aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "              aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa> *aaaa =\n"
      "    new aaaaaaaaaaaaa<aaaaaaaaaa, aaaaaaaaaaa,\n"
      "                      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                      aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa>(\n"
      "        bbbbbbbbbbbbbbbbbbbbbbbb);",
      getLLVMStyleWithColumns(72));
  EXPECT_EQ("static_cast<A< //\n"
            "    B> *>(\n"
            "\n"
            "    );",
            format("static_cast<A<//\n"
                   "    B>*>(\n"
                   "\n"
                   "    );"));
  verifyFormat("int aaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    const typename aaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaa);");

  FormatStyle AlwaysBreak = getLLVMStyle();
  AlwaysBreak.AlwaysBreakTemplateDeclarations = true;
  verifyFormat("template <typename T>\nclass C {};", AlwaysBreak);
  verifyFormat("template <typename T>\nvoid f();", AlwaysBreak);
  verifyFormat("template <typename T>\nvoid f() {}", AlwaysBreak);
  verifyFormat("void aaaaaaaaaaaaaaaaaaa<aaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "                         bbbbbbbbbbbbbbbbbbbbbbbbbbbb>(\n"
               "    ccccccccccccccccccccccccccccccccccccccccccccccc);");
  verifyFormat("template <template <typename> class Fooooooo,\n"
               "          template <typename> class Baaaaaaar>\n"
               "struct C {};",
               AlwaysBreak);
  verifyFormat("template <typename T> // T can be A, B or C.\n"
               "struct C {};",
               AlwaysBreak);
  verifyFormat("template <enum E> class A {\n"
               "public:\n"
               "  E *f();\n"
               "};");
}

TEST_F(FormatTest, WrapsAtNestedNameSpecifiers) {
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa::\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa();");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa::\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa());");

  // FIXME: Should we have the extra indent after the second break?
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa::\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa::\n"
      "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa();");

  verifyFormat(
      "aaaaaaaaaaaaaaa(bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb::\n"
      "                    cccccccccccccccccccccccccccccccccccccccccccccc());");

  // Breaking at nested name specifiers is generally not desirable.
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa::aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaaaaa);");

  verifyFormat(
      "aaaaaaaaaaaaaaaaaa(aaaaaaaa,\n"
      "                   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa::\n"
      "                       aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                   aaaaaaaaaaaaaaaaaaaaa);",
      getLLVMStyleWithColumns(74));

  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa::\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        .aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa();");
}

TEST_F(FormatTest, UnderstandsTemplateParameters) {
  verifyFormat("A<int> a;");
  verifyFormat("A<A<A<int>>> a;");
  verifyFormat("A<A<A<int, 2>, 3>, 4> a;");
  verifyFormat("bool x = a < 1 || 2 > a;");
  verifyFormat("bool x = 5 < f<int>();");
  verifyFormat("bool x = f<int>() > 5;");
  verifyFormat("bool x = 5 < a<int>::x;");
  verifyFormat("bool x = a < 4 ? a > 2 : false;");
  verifyFormat("bool x = f() ? a < 2 : a > 2;");

  verifyGoogleFormat("A<A<int>> a;");
  verifyGoogleFormat("A<A<A<int>>> a;");
  verifyGoogleFormat("A<A<A<A<int>>>> a;");
  verifyGoogleFormat("A<A<int> > a;");
  verifyGoogleFormat("A<A<A<int> > > a;");
  verifyGoogleFormat("A<A<A<A<int> > > > a;");
  verifyGoogleFormat("A<::A<int>> a;");
  verifyGoogleFormat("A<::A> a;");
  verifyGoogleFormat("A< ::A> a;");
  verifyGoogleFormat("A< ::A<int> > a;");
  EXPECT_EQ("A<A<A<A>>> a;", format("A<A<A<A> >> a;", getGoogleStyle()));
  EXPECT_EQ("A<A<A<A>>> a;", format("A<A<A<A>> > a;", getGoogleStyle()));
  EXPECT_EQ("A<::A<int>> a;", format("A< ::A<int>> a;", getGoogleStyle()));
  EXPECT_EQ("A<::A<int>> a;", format("A<::A<int> > a;", getGoogleStyle()));
  EXPECT_EQ("auto x = [] { A<A<A<A>>> a; };",
            format("auto x=[]{A<A<A<A> >> a;};", getGoogleStyle()));

  verifyFormat("A<A>> a;", getChromiumStyle(FormatStyle::LK_Cpp));

  verifyFormat("test >> a >> b;");
  verifyFormat("test << a >> b;");

  verifyFormat("f<int>();");
  verifyFormat("template <typename T> void f() {}");
  verifyFormat("struct A<std::enable_if<sizeof(T2) < sizeof(int32)>::type>;");
  verifyFormat("struct A<std::enable_if<sizeof(T2) ? sizeof(int32) : "
               "sizeof(char)>::type>;");
  verifyFormat("template <class T> struct S<std::is_arithmetic<T>{}> {};");
  verifyFormat("f(a.operator()<A>());");
  verifyFormat("f(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "      .template operator()<A>());",
               getLLVMStyleWithColumns(35));

  // Not template parameters.
  verifyFormat("return a < b && c > d;");
  verifyFormat("void f() {\n"
               "  while (a < b && c > d) {\n"
               "  }\n"
               "}");
  verifyFormat("template <typename... Types>\n"
               "typename enable_if<0 < sizeof...(Types)>::type Foo() {}");

  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaa >> aaaaa);",
               getLLVMStyleWithColumns(60));
  verifyFormat("static_assert(is_convertible<A &&, B>::value, \"AAA\");");
  verifyFormat("Constructor(A... a) : a_(X<A>{std::forward<A>(a)}...) {}");
  verifyFormat("< < < < < < < < < < < < < < < < < < < < < < < < < < < < < <");
}

TEST_F(FormatTest, BitshiftOperatorWidth) {
  EXPECT_EQ("int a = 1 << 2; /* foo\n"
            "                   bar */",
            format("int    a=1<<2;  /* foo\n"
                   "                   bar */"));

  EXPECT_EQ("int b = 256 >> 1; /* foo\n"
            "                     bar */",
            format("int  b  =256>>1 ;  /* foo\n"
                   "                      bar */"));
}

TEST_F(FormatTest, UnderstandsBinaryOperators) {
  verifyFormat("COMPARE(a, ==, b);");
  verifyFormat("auto s = sizeof...(Ts) - 1;");
}

TEST_F(FormatTest, UnderstandsPointersToMembers) {
  verifyFormat("int A::*x;");
  verifyFormat("int (S::*func)(void *);");
  verifyFormat("void f() { int (S::*func)(void *); }");
  verifyFormat("typedef bool *(Class::*Member)() const;");
  verifyFormat("void f() {\n"
               "  (a->*f)();\n"
               "  a->*x;\n"
               "  (a.*f)();\n"
               "  ((*a).*f)();\n"
               "  a.*x;\n"
               "}");
  verifyFormat("void f() {\n"
               "  (a->*aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)(\n"
               "      aaaa, bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb);\n"
               "}");
  verifyFormat(
      "(aaaaaaaaaa->*bbbbbbb)(\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaa));");
  FormatStyle Style = getLLVMStyle();
  Style.PointerAlignment = FormatStyle::PAS_Left;
  verifyFormat("typedef bool* (Class::*Member)() const;", Style);
}

TEST_F(FormatTest, UnderstandsUnaryOperators) {
  verifyFormat("int a = -2;");
  verifyFormat("f(-1, -2, -3);");
  verifyFormat("a[-1] = 5;");
  verifyFormat("int a = 5 + -2;");
  verifyFormat("if (i == -1) {\n}");
  verifyFormat("if (i != -1) {\n}");
  verifyFormat("if (i > -1) {\n}");
  verifyFormat("if (i < -1) {\n}");
  verifyFormat("++(a->f());");
  verifyFormat("--(a->f());");
  verifyFormat("(a->f())++;");
  verifyFormat("a[42]++;");
  verifyFormat("if (!(a->f())) {\n}");

  verifyFormat("a-- > b;");
  verifyFormat("b ? -a : c;");
  verifyFormat("n * sizeof char16;");
  verifyFormat("n * alignof char16;", getGoogleStyle());
  verifyFormat("sizeof(char);");
  verifyFormat("alignof(char);", getGoogleStyle());

  verifyFormat("return -1;");
  verifyFormat("switch (a) {\n"
               "case -1:\n"
               "  break;\n"
               "}");
  verifyFormat("#define X -1");
  verifyFormat("#define X -kConstant");

  verifyFormat("const NSPoint kBrowserFrameViewPatternOffset = {-5, +3};");
  verifyFormat("const NSPoint kBrowserFrameViewPatternOffset = {+5, -3};");

  verifyFormat("int a = /* confusing comment */ -1;");
  // FIXME: The space after 'i' is wrong, but hopefully, this is a rare case.
  verifyFormat("int a = i /* confusing comment */++;");
}

TEST_F(FormatTest, DoesNotIndentRelativeToUnaryOperators) {
  verifyFormat("if (!aaaaaaaaaa( // break\n"
               "        aaaaa)) {\n"
               "}");
  verifyFormat("aaaaaaaaaa(!aaaaaaaaaa( // break\n"
               "    aaaaa));");
  verifyFormat("*aaa = aaaaaaa( // break\n"
               "    bbbbbb);");
}

TEST_F(FormatTest, UnderstandsOverloadedOperators) {
  verifyFormat("bool operator<();");
  verifyFormat("bool operator>();");
  verifyFormat("bool operator=();");
  verifyFormat("bool operator==();");
  verifyFormat("bool operator!=();");
  verifyFormat("int operator+();");
  verifyFormat("int operator++();");
  verifyFormat("bool operator,();");
  verifyFormat("bool operator();");
  verifyFormat("bool operator()();");
  verifyFormat("bool operator[]();");
  verifyFormat("operator bool();");
  verifyFormat("operator int();");
  verifyFormat("operator void *();");
  verifyFormat("operator SomeType<int>();");
  verifyFormat("operator SomeType<int, int>();");
  verifyFormat("operator SomeType<SomeType<int>>();");
  verifyFormat("void *operator new(std::size_t size);");
  verifyFormat("void *operator new[](std::size_t size);");
  verifyFormat("void operator delete(void *ptr);");
  verifyFormat("void operator delete[](void *ptr);");
  verifyFormat("template <typename AAAAAAA, typename BBBBBBB>\n"
               "AAAAAAA operator/(const AAAAAAA &a, BBBBBBB &b);");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaa operator,(\n"
               "    aaaaaaaaaaaaaaaaaaaaa &aaaaaaaaaaaaaaaaaaaaaaaaaa) const;");

  verifyFormat(
      "ostream &operator<<(ostream &OutputStream,\n"
      "                    SomeReallyLongType WithSomeReallyLongValue);");
  verifyFormat("bool operator<(const aaaaaaaaaaaaaaaaaaaaa &left,\n"
               "               const aaaaaaaaaaaaaaaaaaaaa &right) {\n"
               "  return left.group < right.group;\n"
               "}");
  verifyFormat("SomeType &operator=(const SomeType &S);");
  verifyFormat("f.template operator()<int>();");

  verifyGoogleFormat("operator void*();");
  verifyGoogleFormat("operator SomeType<SomeType<int>>();");
  verifyGoogleFormat("operator ::A();");

  verifyFormat("using A::operator+;");
  verifyFormat("inline A operator^(const A &lhs, const A &rhs) {}\n"
               "int i;");
}

TEST_F(FormatTest, UnderstandsFunctionRefQualification) {
  verifyFormat("Deleted &operator=(const Deleted &) & = default;");
  verifyFormat("Deleted &operator=(const Deleted &) && = delete;");
  verifyFormat("SomeType MemberFunction(const Deleted &) & = delete;");
  verifyFormat("SomeType MemberFunction(const Deleted &) && = delete;");
  verifyFormat("Deleted &operator=(const Deleted &) &;");
  verifyFormat("Deleted &operator=(const Deleted &) &&;");
  verifyFormat("SomeType MemberFunction(const Deleted &) &;");
  verifyFormat("SomeType MemberFunction(const Deleted &) &&;");
  verifyFormat("SomeType MemberFunction(const Deleted &) && {}");
  verifyFormat("SomeType MemberFunction(const Deleted &) && final {}");
  verifyFormat("SomeType MemberFunction(const Deleted &) && override {}");
  verifyFormat("SomeType MemberFunction(const Deleted &) const &;");
  verifyFormat("template <typename T>\n"
               "void F(T) && = delete;",
               getGoogleStyle());

  FormatStyle AlignLeft = getLLVMStyle();
  AlignLeft.PointerAlignment = FormatStyle::PAS_Left;
  verifyFormat("void A::b() && {}", AlignLeft);
  verifyFormat("Deleted& operator=(const Deleted&) & = default;", AlignLeft);
  verifyFormat("SomeType MemberFunction(const Deleted&) & = delete;",
               AlignLeft);
  verifyFormat("Deleted& operator=(const Deleted&) &;", AlignLeft);
  verifyFormat("SomeType MemberFunction(const Deleted&) &;", AlignLeft);
  verifyFormat("auto Function(T t) & -> void {}", AlignLeft);
  verifyFormat("auto Function(T... t) & -> void {}", AlignLeft);
  verifyFormat("auto Function(T) & -> void {}", AlignLeft);
  verifyFormat("auto Function(T) & -> void;", AlignLeft);
  verifyFormat("SomeType MemberFunction(const Deleted&) const &;", AlignLeft);

  FormatStyle Spaces = getLLVMStyle();
  Spaces.SpacesInCStyleCastParentheses = true;
  verifyFormat("Deleted &operator=(const Deleted &) & = default;", Spaces);
  verifyFormat("SomeType MemberFunction(const Deleted &) & = delete;", Spaces);
  verifyFormat("Deleted &operator=(const Deleted &) &;", Spaces);
  verifyFormat("SomeType MemberFunction(const Deleted &) &;", Spaces);

  Spaces.SpacesInCStyleCastParentheses = false;
  Spaces.SpacesInParentheses = true;
  verifyFormat("Deleted &operator=( const Deleted & ) & = default;", Spaces);
  verifyFormat("SomeType MemberFunction( const Deleted & ) & = delete;", Spaces);
  verifyFormat("Deleted &operator=( const Deleted & ) &;", Spaces);
  verifyFormat("SomeType MemberFunction( const Deleted & ) &;", Spaces);
}

TEST_F(FormatTest, UnderstandsNewAndDelete) {
  verifyFormat("void f() {\n"
               "  A *a = new A;\n"
               "  A *a = new (placement) A;\n"
               "  delete a;\n"
               "  delete (A *)a;\n"
               "}");
  verifyFormat("new (aaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaa))\n"
               "    typename aaaaaaaaaaaaaaaaaaaaaaaa();");
  verifyFormat("auto aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
               "    new (aaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaa))\n"
               "        typename aaaaaaaaaaaaaaaaaaaaaaaa();");
  verifyFormat("delete[] h->p;");
}

TEST_F(FormatTest, UnderstandsUsesOfStarAndAmp) {
  verifyFormat("int *f(int *a) {}");
  verifyFormat("int main(int argc, char **argv) {}");
  verifyFormat("Test::Test(int b) : a(b * b) {}");
  verifyIndependentOfContext("f(a, *a);");
  verifyFormat("void g() { f(*a); }");
  verifyIndependentOfContext("int a = b * 10;");
  verifyIndependentOfContext("int a = 10 * b;");
  verifyIndependentOfContext("int a = b * c;");
  verifyIndependentOfContext("int a += b * c;");
  verifyIndependentOfContext("int a -= b * c;");
  verifyIndependentOfContext("int a *= b * c;");
  verifyIndependentOfContext("int a /= b * c;");
  verifyIndependentOfContext("int a = *b;");
  verifyIndependentOfContext("int a = *b * c;");
  verifyIndependentOfContext("int a = b * *c;");
  verifyIndependentOfContext("int a = b * (10);");
  verifyIndependentOfContext("S << b * (10);");
  verifyIndependentOfContext("return 10 * b;");
  verifyIndependentOfContext("return *b * *c;");
  verifyIndependentOfContext("return a & ~b;");
  verifyIndependentOfContext("f(b ? *c : *d);");
  verifyIndependentOfContext("int a = b ? *c : *d;");
  verifyIndependentOfContext("*b = a;");
  verifyIndependentOfContext("a * ~b;");
  verifyIndependentOfContext("a * !b;");
  verifyIndependentOfContext("a * +b;");
  verifyIndependentOfContext("a * -b;");
  verifyIndependentOfContext("a * ++b;");
  verifyIndependentOfContext("a * --b;");
  verifyIndependentOfContext("a[4] * b;");
  verifyIndependentOfContext("a[a * a] = 1;");
  verifyIndependentOfContext("f() * b;");
  verifyIndependentOfContext("a * [self dostuff];");
  verifyIndependentOfContext("int x = a * (a + b);");
  verifyIndependentOfContext("(a *)(a + b);");
  verifyIndependentOfContext("*(int *)(p & ~3UL) = 0;");
  verifyIndependentOfContext("int *pa = (int *)&a;");
  verifyIndependentOfContext("return sizeof(int **);");
  verifyIndependentOfContext("return sizeof(int ******);");
  verifyIndependentOfContext("return (int **&)a;");
  verifyIndependentOfContext("f((*PointerToArray)[10]);");
  verifyFormat("void f(Type (*parameter)[10]) {}");
  verifyFormat("void f(Type (&parameter)[10]) {}");
  verifyGoogleFormat("return sizeof(int**);");
  verifyIndependentOfContext("Type **A = static_cast<Type **>(P);");
  verifyGoogleFormat("Type** A = static_cast<Type**>(P);");
  verifyFormat("auto a = [](int **&, int ***) {};");
  verifyFormat("auto PointerBinding = [](const char *S) {};");
  verifyFormat("typedef typeof(int(int, int)) *MyFunc;");
  verifyFormat("[](const decltype(*a) &value) {}");
  verifyFormat("decltype(a * b) F();");
  verifyFormat("#define MACRO() [](A *a) { return 1; }");
  verifyFormat("Constructor() : member([](A *a, B *b) {}) {}");
  verifyIndependentOfContext("typedef void (*f)(int *a);");
  verifyIndependentOfContext("int i{a * b};");
  verifyIndependentOfContext("aaa && aaa->f();");
  verifyIndependentOfContext("int x = ~*p;");
  verifyFormat("Constructor() : a(a), area(width * height) {}");
  verifyFormat("Constructor() : a(a), area(a, width * height) {}");
  verifyGoogleFormat("MACRO Constructor(const int& i) : a(a), b(b) {}");
  verifyFormat("void f() { f(a, c * d); }");
  verifyFormat("void f() { f(new a(), c * d); }");
  verifyFormat("void f(const MyOverride &override);");
  verifyFormat("void f(const MyFinal &final);");
  verifyIndependentOfContext("bool a = f() && override.f();");
  verifyIndependentOfContext("bool a = f() && final.f();");

  verifyIndependentOfContext("InvalidRegions[*R] = 0;");

  verifyIndependentOfContext("A<int *> a;");
  verifyIndependentOfContext("A<int **> a;");
  verifyIndependentOfContext("A<int *, int *> a;");
  verifyIndependentOfContext("A<int *[]> a;");
  verifyIndependentOfContext(
      "const char *const p = reinterpret_cast<const char *const>(q);");
  verifyIndependentOfContext("A<int **, int **> a;");
  verifyIndependentOfContext("void f(int *a = d * e, int *b = c * d);");
  verifyFormat("for (char **a = b; *a; ++a) {\n}");
  verifyFormat("for (; a && b;) {\n}");
  verifyFormat("bool foo = true && [] { return false; }();");

  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaa, *aaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");

  verifyGoogleFormat("int const* a = &b;");
  verifyGoogleFormat("**outparam = 1;");
  verifyGoogleFormat("*outparam = a * b;");
  verifyGoogleFormat("int main(int argc, char** argv) {}");
  verifyGoogleFormat("A<int*> a;");
  verifyGoogleFormat("A<int**> a;");
  verifyGoogleFormat("A<int*, int*> a;");
  verifyGoogleFormat("A<int**, int**> a;");
  verifyGoogleFormat("f(b ? *c : *d);");
  verifyGoogleFormat("int a = b ? *c : *d;");
  verifyGoogleFormat("Type* t = **x;");
  verifyGoogleFormat("Type* t = *++*x;");
  verifyGoogleFormat("*++*x;");
  verifyGoogleFormat("Type* t = const_cast<T*>(&*x);");
  verifyGoogleFormat("Type* t = x++ * y;");
  verifyGoogleFormat(
      "const char* const p = reinterpret_cast<const char* const>(q);");
  verifyGoogleFormat("void f(int i = 0, SomeType** temps = NULL);");
  verifyGoogleFormat("void f(Bar* a = nullptr, Bar* b);");
  verifyGoogleFormat("template <typename T>\n"
                     "void f(int i = 0, SomeType** temps = NULL);");

  FormatStyle Left = getLLVMStyle();
  Left.PointerAlignment = FormatStyle::PAS_Left;
  verifyFormat("x = *a(x) = *a(y);", Left);
  verifyFormat("for (;; *a = b) {\n}", Left);
  verifyFormat("return *this += 1;", Left);

  verifyIndependentOfContext("a = *(x + y);");
  verifyIndependentOfContext("a = &(x + y);");
  verifyIndependentOfContext("*(x + y).call();");
  verifyIndependentOfContext("&(x + y)->call();");
  verifyFormat("void f() { &(*I).first; }");

  verifyIndependentOfContext("f(b * /* confusing comment */ ++c);");
  verifyFormat(
      "int *MyValues = {\n"
      "    *A, // Operator detection might be confused by the '{'\n"
      "    *BB // Operator detection might be confused by previous comment\n"
      "};");

  verifyIndependentOfContext("if (int *a = &b)");
  verifyIndependentOfContext("if (int &a = *b)");
  verifyIndependentOfContext("if (a & b[i])");
  verifyIndependentOfContext("if (a::b::c::d & b[i])");
  verifyIndependentOfContext("if (*b[i])");
  verifyIndependentOfContext("if (int *a = (&b))");
  verifyIndependentOfContext("while (int *a = &b)");
  verifyIndependentOfContext("size = sizeof *a;");
  verifyIndependentOfContext("if (a && (b = c))");
  verifyFormat("void f() {\n"
               "  for (const int &v : Values) {\n"
               "  }\n"
               "}");
  verifyFormat("for (int i = a * a; i < 10; ++i) {\n}");
  verifyFormat("for (int i = 0; i < a * a; ++i) {\n}");
  verifyGoogleFormat("for (int i = 0; i * 2 < z; i *= 2) {\n}");

  verifyFormat("#define A (!a * b)");
  verifyFormat("#define MACRO     \\\n"
               "  int *i = a * b; \\\n"
               "  void f(a *b);",
               getLLVMStyleWithColumns(19));

  verifyIndependentOfContext("A = new SomeType *[Length];");
  verifyIndependentOfContext("A = new SomeType *[Length]();");
  verifyIndependentOfContext("T **t = new T *;");
  verifyIndependentOfContext("T **t = new T *();");
  verifyGoogleFormat("A = new SomeType*[Length]();");
  verifyGoogleFormat("A = new SomeType*[Length];");
  verifyGoogleFormat("T** t = new T*;");
  verifyGoogleFormat("T** t = new T*();");

  FormatStyle PointerLeft = getLLVMStyle();
  PointerLeft.PointerAlignment = FormatStyle::PAS_Left;
  verifyFormat("delete *x;", PointerLeft);
  verifyFormat("STATIC_ASSERT((a & b) == 0);");
  verifyFormat("STATIC_ASSERT(0 == (a & b));");
  verifyFormat("template <bool a, bool b> "
               "typename t::if<x && y>::type f() {}");
  verifyFormat("template <int *y> f() {}");
  verifyFormat("vector<int *> v;");
  verifyFormat("vector<int *const> v;");
  verifyFormat("vector<int *const **const *> v;");
  verifyFormat("vector<int *volatile> v;");
  verifyFormat("vector<a * b> v;");
  verifyFormat("foo<b && false>();");
  verifyFormat("foo<b & 1>();");
  verifyFormat("decltype(*::std::declval<const T &>()) void F();");
  verifyFormat(
      "template <class T,\n"
      "          class = typename std::enable_if<\n"
      "              std::is_integral<T>::value &&\n"
      "              (sizeof(T) > 1 || sizeof(T) < 8)>::type>\n"
      "void F();",
      getLLVMStyleWithColumns(70));
  verifyFormat(
      "template <class T,\n"
      "          class = typename ::std::enable_if<\n"
      "              ::std::is_array<T>{} && ::std::is_array<T>{}>::type>\n"
      "void F();",
      getGoogleStyleWithColumns(68));

  verifyIndependentOfContext("MACRO(int *i);");
  verifyIndependentOfContext("MACRO(auto *a);");
  verifyIndependentOfContext("MACRO(const A *a);");
  verifyIndependentOfContext("MACRO('0' <= c && c <= '9');");
  verifyFormat("void f() { f(float{1}, a * a); }");
  // FIXME: Is there a way to make this work?
  // verifyIndependentOfContext("MACRO(A *a);");

  verifyFormat("DatumHandle const *operator->() const { return input_; }");
  verifyFormat("return options != nullptr && operator==(*options);");

  EXPECT_EQ("#define OP(x)                                    \\\n"
            "  ostream &operator<<(ostream &s, const A &a) {  \\\n"
            "    return s << a.DebugString();                 \\\n"
            "  }",
            format("#define OP(x) \\\n"
                   "  ostream &operator<<(ostream &s, const A &a) { \\\n"
                   "    return s << a.DebugString(); \\\n"
                   "  }",
                   getLLVMStyleWithColumns(50)));

  // FIXME: We cannot handle this case yet; we might be able to figure out that
  // foo<x> d > v; doesn't make sense.
  verifyFormat("foo<a<b && c> d> v;");

  FormatStyle PointerMiddle = getLLVMStyle();
  PointerMiddle.PointerAlignment = FormatStyle::PAS_Middle;
  verifyFormat("delete *x;", PointerMiddle);
  verifyFormat("int * x;", PointerMiddle);
  verifyFormat("template <int * y> f() {}", PointerMiddle);
  verifyFormat("int * f(int * a) {}", PointerMiddle);
  verifyFormat("int main(int argc, char ** argv) {}", PointerMiddle);
  verifyFormat("Test::Test(int b) : a(b * b) {}", PointerMiddle);
  verifyFormat("A<int *> a;", PointerMiddle);
  verifyFormat("A<int **> a;", PointerMiddle);
  verifyFormat("A<int *, int *> a;", PointerMiddle);
  verifyFormat("A<int * []> a;", PointerMiddle);
  verifyFormat("A = new SomeType *[Length]();", PointerMiddle);
  verifyFormat("A = new SomeType *[Length];", PointerMiddle);
  verifyFormat("T ** t = new T *;", PointerMiddle);

  // Member function reference qualifiers aren't binary operators.
  verifyFormat("string // break\n"
               "operator()() & {}");
  verifyFormat("string // break\n"
               "operator()() && {}");
  verifyGoogleFormat("template <typename T>\n"
                     "auto x() & -> int {}");
}

TEST_F(FormatTest, UnderstandsAttributes) {
  verifyFormat("SomeType s __attribute__((unused)) (InitValue);");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa __attribute__((unused))\n"
               "aaaaaaaaaaaaaaaaaaaaaaa(int i);");
  FormatStyle AfterType = getLLVMStyle();
  AfterType.AlwaysBreakAfterReturnType = FormatStyle::RTBS_AllDefinitions;
  verifyFormat("__attribute__((nodebug)) void\n"
               "foo() {}\n",
               AfterType);
}

TEST_F(FormatTest, UnderstandsEllipsis) {
  verifyFormat("int printf(const char *fmt, ...);");
  verifyFormat("template <class... Ts> void Foo(Ts... ts) { Foo(ts...); }");
  verifyFormat("template <class... Ts> void Foo(Ts *... ts) {}");

  FormatStyle PointersLeft = getLLVMStyle();
  PointersLeft.PointerAlignment = FormatStyle::PAS_Left;
  verifyFormat("template <class... Ts> void Foo(Ts*... ts) {}", PointersLeft);
}

TEST_F(FormatTest, AdaptivelyFormatsPointersAndReferences) {
  EXPECT_EQ("int *a;\n"
            "int *a;\n"
            "int *a;",
            format("int *a;\n"
                   "int* a;\n"
                   "int *a;",
                   getGoogleStyle()));
  EXPECT_EQ("int* a;\n"
            "int* a;\n"
            "int* a;",
            format("int* a;\n"
                   "int* a;\n"
                   "int *a;",
                   getGoogleStyle()));
  EXPECT_EQ("int *a;\n"
            "int *a;\n"
            "int *a;",
            format("int *a;\n"
                   "int * a;\n"
                   "int *  a;",
                   getGoogleStyle()));
  EXPECT_EQ("auto x = [] {\n"
            "  int *a;\n"
            "  int *a;\n"
            "  int *a;\n"
            "};",
            format("auto x=[]{int *a;\n"
                   "int * a;\n"
                   "int *  a;};",
                   getGoogleStyle()));
}

TEST_F(FormatTest, UnderstandsRvalueReferences) {
  verifyFormat("int f(int &&a) {}");
  verifyFormat("int f(int a, char &&b) {}");
  verifyFormat("void f() { int &&a = b; }");
  verifyGoogleFormat("int f(int a, char&& b) {}");
  verifyGoogleFormat("void f() { int&& a = b; }");

  verifyIndependentOfContext("A<int &&> a;");
  verifyIndependentOfContext("A<int &&, int &&> a;");
  verifyGoogleFormat("A<int&&> a;");
  verifyGoogleFormat("A<int&&, int&&> a;");

  // Not rvalue references:
  verifyFormat("template <bool B, bool C> class A {\n"
               "  static_assert(B && C, \"Something is wrong\");\n"
               "};");
  verifyGoogleFormat("#define IF(a, b, c) if (a && (b == c))");
  verifyGoogleFormat("#define WHILE(a, b, c) while (a && (b == c))");
  verifyFormat("#define A(a, b) (a && b)");
}

TEST_F(FormatTest, FormatsBinaryOperatorsPrecedingEquals) {
  verifyFormat("void f() {\n"
               "  x[aaaaaaaaa -\n"
               "    b] = 23;\n"
               "}",
               getLLVMStyleWithColumns(15));
}

TEST_F(FormatTest, FormatsCasts) {
  verifyFormat("Type *A = static_cast<Type *>(P);");
  verifyFormat("Type *A = (Type *)P;");
  verifyFormat("Type *A = (vector<Type *, int *>)P;");
  verifyFormat("int a = (int)(2.0f);");
  verifyFormat("int a = (int)2.0f;");
  verifyFormat("x[(int32)y];");
  verifyFormat("x = (int32)y;");
  verifyFormat("#define AA(X) sizeof(((X *)NULL)->a)");
  verifyFormat("int a = (int)*b;");
  verifyFormat("int a = (int)2.0f;");
  verifyFormat("int a = (int)~0;");
  verifyFormat("int a = (int)++a;");
  verifyFormat("int a = (int)sizeof(int);");
  verifyFormat("int a = (int)+2;");
  verifyFormat("my_int a = (my_int)2.0f;");
  verifyFormat("my_int a = (my_int)sizeof(int);");
  verifyFormat("return (my_int)aaa;");
  verifyFormat("#define x ((int)-1)");
  verifyFormat("#define LENGTH(x, y) (x) - (y) + 1");
  verifyFormat("#define p(q) ((int *)&q)");
  verifyFormat("fn(a)(b) + 1;");

  verifyFormat("void f() { my_int a = (my_int)*b; }");
  verifyFormat("void f() { return P ? (my_int)*P : (my_int)0; }");
  verifyFormat("my_int a = (my_int)~0;");
  verifyFormat("my_int a = (my_int)++a;");
  verifyFormat("my_int a = (my_int)-2;");
  verifyFormat("my_int a = (my_int)1;");
  verifyFormat("my_int a = (my_int *)1;");
  verifyFormat("my_int a = (const my_int)-1;");
  verifyFormat("my_int a = (const my_int *)-1;");
  verifyFormat("my_int a = (my_int)(my_int)-1;");
  verifyFormat("my_int a = (ns::my_int)-2;");
  verifyFormat("case (my_int)ONE:");
  verifyFormat("auto x = (X)this;");

  // FIXME: single value wrapped with paren will be treated as cast.
  verifyFormat("void f(int i = (kValue)*kMask) {}");

  verifyFormat("{ (void)F; }");

  // Don't break after a cast's
  verifyFormat("int aaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
               "    (aaaaaaaaaaaaaaaaaaaaaaaaaa *)(aaaaaaaaaaaaaaaaaaaaaa +\n"
               "                                   bbbbbbbbbbbbbbbbbbbbbb);");

  // These are not casts.
  verifyFormat("void f(int *) {}");
  verifyFormat("f(foo)->b;");
  verifyFormat("f(foo).b;");
  verifyFormat("f(foo)(b);");
  verifyFormat("f(foo)[b];");
  verifyFormat("[](foo) { return 4; }(bar);");
  verifyFormat("(*funptr)(foo)[4];");
  verifyFormat("funptrs[4](foo)[4];");
  verifyFormat("void f(int *);");
  verifyFormat("void f(int *) = 0;");
  verifyFormat("void f(SmallVector<int>) {}");
  verifyFormat("void f(SmallVector<int>);");
  verifyFormat("void f(SmallVector<int>) = 0;");
  verifyFormat("void f(int i = (kA * kB) & kMask) {}");
  verifyFormat("int a = sizeof(int) * b;");
  verifyFormat("int a = alignof(int) * b;", getGoogleStyle());
  verifyFormat("template <> void f<int>(int i) SOME_ANNOTATION;");
  verifyFormat("f(\"%\" SOME_MACRO(ll) \"d\");");
  verifyFormat("aaaaa &operator=(const aaaaa &) LLVM_DELETED_FUNCTION;");

  // These are not casts, but at some point were confused with casts.
  verifyFormat("virtual void foo(int *) override;");
  verifyFormat("virtual void foo(char &) const;");
  verifyFormat("virtual void foo(int *a, char *) const;");
  verifyFormat("int a = sizeof(int *) + b;");
  verifyFormat("int a = alignof(int *) + b;", getGoogleStyle());
  verifyFormat("bool b = f(g<int>) && c;");
  verifyFormat("typedef void (*f)(int i) func;");

  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *foo = (aaaaaaaaaaaaaaaaa *)\n"
               "    bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;");
  // FIXME: The indentation here is not ideal.
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
      "    [bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb] = (*cccccccccccccccc)\n"
      "        [dddddddddddddddddddddddddddddddddddddddddddddddddddddddd];");
}

TEST_F(FormatTest, FormatsFunctionTypes) {
  verifyFormat("A<bool()> a;");
  verifyFormat("A<SomeType()> a;");
  verifyFormat("A<void (*)(int, std::string)> a;");
  verifyFormat("A<void *(int)>;");
  verifyFormat("void *(*a)(int *, SomeType *);");
  verifyFormat("int (*func)(void *);");
  verifyFormat("void f() { int (*func)(void *); }");
  verifyFormat("template <class CallbackClass>\n"
               "using MyCallback = void (CallbackClass::*)(SomeObject *Data);");

  verifyGoogleFormat("A<void*(int*, SomeType*)>;");
  verifyGoogleFormat("void* (*a)(int);");
  verifyGoogleFormat(
      "template <class CallbackClass>\n"
      "using MyCallback = void (CallbackClass::*)(SomeObject* Data);");

  // Other constructs can look somewhat like function types:
  verifyFormat("A<sizeof(*x)> a;");
  verifyFormat("#define DEREF_AND_CALL_F(x) f(*x)");
  verifyFormat("some_var = function(*some_pointer_var)[0];");
  verifyFormat("void f() { function(*some_pointer_var)[0] = 10; }");
  verifyFormat("int x = f(&h)();");
  verifyFormat("returnsFunction(&param1, &param2)(param);");
}

TEST_F(FormatTest, FormatsPointersToArrayTypes) {
  verifyFormat("A (*foo_)[6];");
  verifyFormat("vector<int> (*foo_)[6];");
}

TEST_F(FormatTest, BreaksLongVariableDeclarations) {
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongType\n"
               "    LoooooooooooooooooooooooooooooooooooooooongVariable;");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongType const\n"
               "    LoooooooooooooooooooooooooooooooooooooooongVariable;");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongType\n"
               "    *LoooooooooooooooooooooooooooooooooooooooongVariable;");

  // Different ways of ()-initializiation.
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongType\n"
               "    LoooooooooooooooooooooooooooooooooooooooongVariable(1);");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongType\n"
               "    LoooooooooooooooooooooooooooooooooooooooongVariable(a);");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongType\n"
               "    LoooooooooooooooooooooooooooooooooooooooongVariable({});");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongType\n"
               "    LoooooooooooooooooooooooooooooooooooooongVariable([A a]);");
}

TEST_F(FormatTest, BreaksLongDeclarations) {
  verifyFormat("typedef LoooooooooooooooooooooooooooooooooooooooongType\n"
               "    AnotherNameForTheLongType;");
  verifyFormat("typedef LongTemplateType<aaaaaaaaaaaaaaaaaaa()>\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongReturnType\n"
               "LoooooooooooooooooooooooooooooooongFunctionDeclaration();");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongReturnType *\n"
               "LoooooooooooooooooooooooooooooooongFunctionDeclaration();");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongReturnType\n"
               "LooooooooooooooooooooooooooooooooooongFunctionDefinition() {}");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongReturnType MACRO\n"
               "LooooooooooooooooooooooooooooooooooongFunctionDefinition() {}");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongReturnType const\n"
               "LooooooooooooooooooooooooooooooooooongFunctionDefinition() {}");
  verifyFormat("decltype(LoooooooooooooooooooooooooooooooooooooooongName)\n"
               "LooooooooooooooooooooooooooooooooooongFunctionDefinition() {}");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongReturnType\n"
               "LooooooooooooooooooooooooooongFunctionDeclaration(T... t);");
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongReturnType\n"
               "LooooooooooooooooooooooooooongFunctionDeclaration(T /*t*/) {}");
  FormatStyle Indented = getLLVMStyle();
  Indented.IndentWrappedFunctionNames = true;
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongReturnType\n"
               "    LoooooooooooooooooooooooooooooooongFunctionDeclaration();",
               Indented);
  verifyFormat(
      "LoooooooooooooooooooooooooooooooooooooooongReturnType\n"
      "    LooooooooooooooooooooooooooooooooooongFunctionDefinition() {}",
      Indented);
  verifyFormat(
      "LoooooooooooooooooooooooooooooooooooooooongReturnType const\n"
      "    LooooooooooooooooooooooooooooooooooongFunctionDefinition() {}",
      Indented);
  verifyFormat(
      "decltype(LoooooooooooooooooooooooooooooooooooooooongName)\n"
      "    LooooooooooooooooooooooooooooooooooongFunctionDefinition() {}",
      Indented);

  // FIXME: Without the comment, this breaks after "(".
  verifyFormat("LoooooooooooooooooooooooooooooooooooooooongType  // break\n"
               "    (*LoooooooooooooooooooooooooooongFunctionTypeVarialbe)();",
               getGoogleStyle());

  verifyFormat("int *someFunction(int LoooooooooooooooooooongParam1,\n"
               "                  int LoooooooooooooooooooongParam2) {}");
  verifyFormat(
      "TypeSpecDecl *TypeSpecDecl::Create(ASTContext &C, DeclContext *DC,\n"
      "                                   SourceLocation L, IdentifierIn *II,\n"
      "                                   Type *T) {}");
  verifyFormat("ReallyLongReturnType<TemplateParam1, TemplateParam2>\n"
               "ReallyReaaallyLongFunctionName(\n"
               "    const std::string &SomeParameter,\n"
               "    const SomeType<string, SomeOtherTemplateParameter>\n"
               "        &ReallyReallyLongParameterName,\n"
               "    const SomeType<string, SomeOtherTemplateParameter>\n"
               "        &AnotherLongParameterName) {}");
  verifyFormat("template <typename A>\n"
               "SomeLoooooooooooooooooooooongType<\n"
               "    typename some_namespace::SomeOtherType<A>::Type>\n"
               "Function() {}");

  verifyGoogleFormat(
      "aaaaaaaaaaaaaaaa::aaaaaaaaaaaaaaaa<aaaaaaaaaaaaa, aaaaaaaaaaaa>\n"
      "    aaaaaaaaaaaaaaaaaaaaaaa;");
  verifyGoogleFormat(
      "TypeSpecDecl* TypeSpecDecl::Create(ASTContext& C, DeclContext* DC,\n"
      "                                   SourceLocation L) {}");
  verifyGoogleFormat(
      "some_namespace::LongReturnType\n"
      "long_namespace::SomeVeryLongClass::SomeVeryLongFunction(\n"
      "    int first_long_parameter, int second_parameter) {}");

  verifyGoogleFormat("template <typename T>\n"
                     "aaaaaaaa::aaaaa::aaaaaa<T, aaaaaaaaaaaaaaaaaaaaaaaaa>\n"
                     "aaaaaaaaaaaaaaaaaaaaaaaa<T>::aaaaaaa() {}");
  verifyGoogleFormat("A<A<A>> aaaaaaaaaa(int aaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
                     "                   int aaaaaaaaaaaaaaaaaaaaaaa);");

  verifyFormat("typedef size_t (*aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)(\n"
               "    const aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "        *aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("void aaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    vector<aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa>\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaa);");
  verifyFormat("void aaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    vector<aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa<\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa>>\n"
               "        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
}

TEST_F(FormatTest, FormatsArrays) {
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaa[aaaaaaaaaaaaaaaaaaaaaaaaa]\n"
               "                         [bbbbbbbbbbbbbbbbbbbbbbbbb] = c;");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaa[aaaaaaaaaaa(aaaaaaaaaaaa)]\n"
               "                         [bbbbbbbbbbb(bbbbbbbbbbbb)] = c;");
  verifyFormat("if (aaaaaaaaaaaaaaaaaaaaaaaa &&\n"
               "    aaaaaaaaaaaaaaaaaaa[aaaaaaaaaaaaa][aaaaaaaaaaaaa]) {\n}");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    [bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb] = ccccccccccc;");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    [a][bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb] = cccccccc;");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n"
               "    [aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa]\n"
               "    [bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb] = ccccccccccc;");
  verifyFormat(
      "llvm::outs() << \"aaaaaaaaaaaa: \"\n"
      "             << (*aaaaaaaiaaaaaaa)[aaaaaaaaaaaaaaaaaaaaaaaaa]\n"
      "                                  [aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa];");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa[aaaaaaaaaaaaaaaaa][a]\n"
               "    .aaaaaaaaaaaaaaaaaaaaaa();");

  verifyGoogleFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa<int>\n"
                     "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa[aaaaaaaaaaaa];");
  verifyFormat(
      "aaaaaaaaaaa aaaaaaaaaaaaaaa = aaaaaaaaaaaaaaaaaaaaaaaaaa->aaaaaaaaa[0]\n"
      "                                  .aaaaaaa[0]\n"
      "                                  .aaaaaaaaaaaaaaaaaaaaaa();");
  verifyFormat("a[::b::c];");

  verifyNoCrash("a[,Y?)]", getLLVMStyleWithColumns(10));

  FormatStyle NoColumnLimit = getLLVMStyleWithColumns(0);
  verifyFormat("aaaaa[bbbbbb].cccccc()", NoColumnLimit);
}

TEST_F(FormatTest, LineStartsWithSpecialCharacter) {
  verifyFormat("(a)->b();");
  verifyFormat("--a;");
}

TEST_F(FormatTest, HandlesIncludeDirectives) {
  verifyFormat("#include <string>\n"
               "#include <a/b/c.h>\n"
               "#include \"a/b/string\"\n"
               "#include \"string.h\"\n"
               "#include \"string.h\"\n"
               "#include <a-a>\n"
               "#include < path with space >\n"
               "#include_next <test.h>"
               "#include \"abc.h\" // this is included for ABC\n"
               "#include \"some long include\" // with a comment\n"
               "#include \"some very long include paaaaaaaaaaaaaaaaaaaaaaath\"",
               getLLVMStyleWithColumns(35));
  EXPECT_EQ("#include \"a.h\"", format("#include  \"a.h\""));
  EXPECT_EQ("#include <a>", format("#include<a>"));

  verifyFormat("#import <string>");
  verifyFormat("#import <a/b/c.h>");
  verifyFormat("#import \"a/b/string\"");
  verifyFormat("#import \"string.h\"");
  verifyFormat("#import \"string.h\"");
  verifyFormat("#if __has_include(<strstream>)\n"
               "#include <strstream>\n"
               "#endif");

  verifyFormat("#define MY_IMPORT <a/b>");

  // Protocol buffer definition or missing "#".
  verifyFormat("import \"aaaaaaaaaaaaaaaaa/aaaaaaaaaaaaaaa\";",
               getLLVMStyleWithColumns(30));

  FormatStyle Style = getLLVMStyle();
  Style.AlwaysBreakBeforeMultilineStrings = true;
  Style.ColumnLimit = 0;
  verifyFormat("#import \"abc.h\"", Style);

  // But 'import' might also be a regular C++ namespace.
  verifyFormat("import::SomeFunction(aaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "                     aaaaaaaaaaaaaaaaaaaaaaaaaaaaa);");
}

//===----------------------------------------------------------------------===//
// Error recovery tests.
//===----------------------------------------------------------------------===//

TEST_F(FormatTest, IncompleteParameterLists) {
  FormatStyle NoBinPacking = getLLVMStyle();
  NoBinPacking.BinPackParameters = false;
  verifyFormat("void aaaaaaaaaaaaaaaaaa(int level,\n"
               "                        double *min_x,\n"
               "                        double *max_x,\n"
               "                        double *min_y,\n"
               "                        double *max_y,\n"
               "                        double *min_z,\n"
               "                        double *max_z, ) {}",
               NoBinPacking);
}

TEST_F(FormatTest, IncorrectCodeTrailingStuff) {
  verifyFormat("void f() { return; }\n42");
  verifyFormat("void f() {\n"
               "  if (0)\n"
               "    return;\n"
               "}\n"
               "42");
  verifyFormat("void f() { return }\n42");
  verifyFormat("void f() {\n"
               "  if (0)\n"
               "    return\n"
               "}\n"
               "42");
}

TEST_F(FormatTest, IncorrectCodeMissingSemicolon) {
  EXPECT_EQ("void f() { return }", format("void  f ( )  {  return  }"));
  EXPECT_EQ("void f() {\n"
            "  if (a)\n"
            "    return\n"
            "}",
            format("void  f  (  )  {  if  ( a )  return  }"));
  EXPECT_EQ("namespace N {\n"
            "void f()\n"
            "}",
            format("namespace  N  {  void f()  }"));
  EXPECT_EQ("namespace N {\n"
            "void f() {}\n"
            "void g()\n"
            "}",
            format("namespace N  { void f( ) { } void g( ) }"));
}

TEST_F(FormatTest, IndentationWithinColumnLimitNotPossible) {
  verifyFormat("int aaaaaaaa =\n"
               "    // Overlylongcomment\n"
               "    b;",
               getLLVMStyleWithColumns(20));
  verifyFormat("function(\n"
               "    ShortArgument,\n"
               "    LoooooooooooongArgument);\n",
               getLLVMStyleWithColumns(20));
}

TEST_F(FormatTest, IncorrectAccessSpecifier) {
  verifyFormat("public:");
  verifyFormat("class A {\n"
               "public\n"
               "  void f() {}\n"
               "};");
  verifyFormat("public\n"
               "int qwerty;");
  verifyFormat("public\n"
               "B {}");
  verifyFormat("public\n"
               "{}");
  verifyFormat("public\n"
               "B { int x; }");
}

TEST_F(FormatTest, IncorrectCodeUnbalancedBraces) {
  verifyFormat("{");
  verifyFormat("#})");
  verifyNoCrash("(/**/[:!] ?[).");
}

TEST_F(FormatTest, IncorrectCodeDoNoWhile) {
  verifyFormat("do {\n}");
  verifyFormat("do {\n}\n"
               "f();");
  verifyFormat("do {\n}\n"
               "wheeee(fun);");
  verifyFormat("do {\n"
               "  f();\n"
               "}");
}

TEST_F(FormatTest, IncorrectCodeMissingParens) {
  verifyFormat("if {\n  foo;\n  foo();\n}");
  verifyFormat("switch {\n  foo;\n  foo();\n}");
  verifyIncompleteFormat("for {\n  foo;\n  foo();\n}");
  verifyFormat("while {\n  foo;\n  foo();\n}");
  verifyFormat("do {\n  foo;\n  foo();\n} while;");
}

TEST_F(FormatTest, DoesNotTouchUnwrappedLinesWithErrors) {
  verifyIncompleteFormat("namespace {\n"
                         "class Foo { Foo (\n"
                         "};\n"
                         "} // comment");
}

TEST_F(FormatTest, IncorrectCodeErrorDetection) {
  EXPECT_EQ("{\n  {}\n", format("{\n{\n}\n"));
  EXPECT_EQ("{\n  {}\n", format("{\n  {\n}\n"));
  EXPECT_EQ("{\n  {}\n", format("{\n  {\n  }\n"));
  EXPECT_EQ("{\n  {}\n}\n}\n", format("{\n  {\n    }\n  }\n}\n"));

  EXPECT_EQ("{\n"
            "  {\n"
            "    breakme(\n"
            "        qwe);\n"
            "  }\n",
            format("{\n"
                   "    {\n"
                   " breakme(qwe);\n"
                   "}\n",
                   getLLVMStyleWithColumns(10)));
}

TEST_F(FormatTest, LayoutCallsInsideBraceInitializers) {
  verifyFormat("int x = {\n"
               "    avariable,\n"
               "    b(alongervariable)};",
               getLLVMStyleWithColumns(25));
}

TEST_F(FormatTest, LayoutBraceInitializersInReturnStatement) {
  verifyFormat("return (a)(b){1, 2, 3};");
}

TEST_F(FormatTest, LayoutCxx11BraceInitializers) {
  verifyFormat("vector<int> x{1, 2, 3, 4};");
  verifyFormat("vector<int> x{\n"
               "    1, 2, 3, 4,\n"
               "};");
  verifyFormat("vector<T> x{{}, {}, {}, {}};");
  verifyFormat("f({1, 2});");
  verifyFormat("auto v = Foo{-1};");
  verifyFormat("f({1, 2}, {{2, 3}, {4, 5}}, c, {d});");
  verifyFormat("Class::Class : member{1, 2, 3} {}");
  verifyFormat("new vector<int>{1, 2, 3};");
  verifyFormat("new int[3]{1, 2, 3};");
  verifyFormat("new int{1};");
  verifyFormat("return {arg1, arg2};");
  verifyFormat("return {arg1, SomeType{parameter}};");
  verifyFormat("int count = set<int>{f(), g(), h()}.size();");
  verifyFormat("new T{arg1, arg2};");
  verifyFormat("f(MyMap[{composite, key}]);");
  verifyFormat("class Class {\n"
               "  T member = {arg1, arg2};\n"
               "};");
  verifyFormat("vector<int> foo = {::SomeGlobalFunction()};");
  verifyFormat("static_assert(std::is_integral<int>{} + 0, \"\");");
  verifyFormat("int a = std::is_integral<int>{} + 0;");

  verifyFormat("int foo(int i) { return fo1{}(i); }");
  verifyFormat("int foo(int i) { return fo1{}(i); }");
  verifyFormat("auto i = decltype(x){};");
  verifyFormat("std::vector<int> v = {1, 0 /* comment */};");
  verifyFormat("Node n{1, Node{1000}, //\n"
               "       2};");
  verifyFormat("Aaaa aaaaaaa{\n"
               "    {\n"
               "        aaaa,\n"
               "    },\n"
               "};");
  verifyFormat("class C : public D {\n"
               "  SomeClass SC{2};\n"
               "};");
  verifyFormat("class C : public A {\n"
               "  class D : public B {\n"
               "    void f() { int i{2}; }\n"
               "  };\n"
               "};");
  verifyFormat("#define A {a, a},");

  // Cases where distinguising braced lists and blocks is hard.
  verifyFormat("vector<int> v{12} GUARDED_BY(mutex);");
  verifyFormat("void f() {\n"
               "  return; // comment\n"
               "}\n"
               "SomeType t;");
  verifyFormat("void f() {\n"
               "  if (a) {\n"
               "    f();\n"
               "  }\n"
               "}\n"
               "SomeType t;");

  // In combination with BinPackArguments = false.
  FormatStyle NoBinPacking = getLLVMStyle();
  NoBinPacking.BinPackArguments = false;
  verifyFormat("const Aaaaaa aaaaa = {aaaaa,\n"
               "                      bbbbb,\n"
               "                      ccccc,\n"
               "                      ddddd,\n"
               "                      eeeee,\n"
               "                      ffffff,\n"
               "                      ggggg,\n"
               "                      hhhhhh,\n"
               "                      iiiiii,\n"
               "                      jjjjjj,\n"
               "                      kkkkkk};",
               NoBinPacking);
  verifyFormat("const Aaaaaa aaaaa = {\n"
               "    aaaaa,\n"
               "    bbbbb,\n"
               "    ccccc,\n"
               "    ddddd,\n"
               "    eeeee,\n"
               "    ffffff,\n"
               "    ggggg,\n"
               "    hhhhhh,\n"
               "    iiiiii,\n"
               "    jjjjjj,\n"
               "    kkkkkk,\n"
               "};",
               NoBinPacking);
  verifyFormat(
      "const Aaaaaa aaaaa = {\n"
      "    aaaaa,  bbbbb,  ccccc,  ddddd,  eeeee,  ffffff, ggggg, hhhhhh,\n"
      "    iiiiii, jjjjjj, kkkkkk, aaaaa,  bbbbb,  ccccc,  ddddd, eeeee,\n"
      "    ffffff, ggggg,  hhhhhh, iiiiii, jjjjjj, kkkkkk,\n"
      "};",
      NoBinPacking);

  // FIXME: The alignment of these trailing comments might be bad. Then again,
  // this might be utterly useless in real code.
  verifyFormat("Constructor::Constructor()\n"
               "    : some_value{         //\n"
               "                 aaaaaaa, //\n"
               "                 bbbbbbb} {}");

  // In braced lists, the first comment is always assumed to belong to the
  // first element. Thus, it can be moved to the next or previous line as
  // appropriate.
  EXPECT_EQ("function({// First element:\n"
            "          1,\n"
            "          // Second element:\n"
            "          2});",
            format("function({\n"
                   "    // First element:\n"
                   "    1,\n"
                   "    // Second element:\n"
                   "    2});"));
  EXPECT_EQ("std::vector<int> MyNumbers{\n"
            "    // First element:\n"
            "    1,\n"
            "    // Second element:\n"
            "    2};",
            format("std::vector<int> MyNumbers{// First element:\n"
                   "                           1,\n"
                   "                           // Second element:\n"
                   "                           2};",
                   getLLVMStyleWithColumns(30)));
  // A trailing comma should still lead to an enforced line break.
  EXPECT_EQ("vector<int> SomeVector = {\n"
            "    // aaa\n"
            "    1, 2,\n"
            "};",
            format("vector<int> SomeVector = { // aaa\n"
                   "    1, 2, };"));

  FormatStyle ExtraSpaces = getLLVMStyle();
  ExtraSpaces.Cpp11BracedListStyle = false;
  ExtraSpaces.ColumnLimit = 75;
  verifyFormat("vector<int> x{ 1, 2, 3, 4 };", ExtraSpaces);
  verifyFormat("vector<T> x{ {}, {}, {}, {} };", ExtraSpaces);
  verifyFormat("f({ 1, 2 });", ExtraSpaces);
  verifyFormat("auto v = Foo{ 1 };", ExtraSpaces);
  verifyFormat("f({ 1, 2 }, { { 2, 3 }, { 4, 5 } }, c, { d });", ExtraSpaces);
  verifyFormat("Class::Class : member{ 1, 2, 3 } {}", ExtraSpaces);
  verifyFormat("new vector<int>{ 1, 2, 3 };", ExtraSpaces);
  verifyFormat("new int[3]{ 1, 2, 3 };", ExtraSpaces);
  verifyFormat("return { arg1, arg2 };", ExtraSpaces);
  verifyFormat("return { arg1, SomeType{ parameter } };", ExtraSpaces);
  verifyFormat("int count = set<int>{ f(), g(), h() }.size();", ExtraSpaces);
  verifyFormat("new T{ arg1, arg2 };", ExtraSpaces);
  verifyFormat("f(MyMap[{ composite, key }]);", ExtraSpaces);
  verifyFormat("class Class {\n"
               "  T member = { arg1, arg2 };\n"
               "};",
               ExtraSpaces);
  verifyFormat(
      "foo = aaaaaaaaaaa ? vector<int>{ aaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "                                 aaaaaaaaaaaaaaaaaaaa, aaaaa }\n"
      "                  : vector<int>{ bbbbbbbbbbbbbbbbbbbbbbbbbbb,\n"
      "                                 bbbbbbbbbbbbbbbbbbbb, bbbbb };",
      ExtraSpaces);
  verifyFormat("DoSomethingWithVector({} /* No data */);", ExtraSpaces);
  verifyFormat("DoSomethingWithVector({ {} /* No data */ }, { { 1, 2 } });",
               ExtraSpaces);
  verifyFormat(
      "someFunction(OtherParam,\n"
      "             BracedList{ // comment 1 (Forcing interesting break)\n"
      "                         param1, param2,\n"
      "                         // comment 2\n"
      "                         param3, param4 });",
      ExtraSpaces);
  verifyFormat(
      "std::this_thread::sleep_for(\n"
      "    std::chrono::nanoseconds{ std::chrono::seconds{ 1 } } / 5);",
      ExtraSpaces);
  verifyFormat("std::vector<MyValues> aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa{\n"
               "    aaaaaaa,\n"
               "    aaaaaaaaaa,\n"
               "    aaaaa,\n"
               "    aaaaaaaaaaaaaaa,\n"
               "    aaa,\n"
               "    aaaaaaaaaa,\n"
               "    a,\n"
               "    aaaaaaaaaaaaaaaaaaaaa,\n"
               "    aaaaaaaaaaaa,\n"
               "    aaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaa,\n"
               "    aaaaaaa,\n"
               "    a};");
  verifyFormat("vector<int> foo = { ::SomeGlobalFunction() };", ExtraSpaces);
}

TEST_F(FormatTest, FormatsBracedListsInColumnLayout) {
  verifyFormat("vector<int> x = {1, 22, 333, 4444, 55555, 666666, 7777777,\n"
               "                 1, 22, 333, 4444, 55555, 666666, 7777777,\n"
               "                 1, 22, 333, 4444, 55555, 666666, 7777777,\n"
               "                 1, 22, 333, 4444, 55555, 666666, 7777777,\n"
               "                 1, 22, 333, 4444, 55555, 666666, 7777777,\n"
               "                 1, 22, 333, 4444, 55555, 666666, 7777777};");
  verifyFormat("vector<int> x = {1, 22, 333, 4444, 55555, 666666, 7777777, //\n"
               "                 1, 22, 333, 4444, 55555, 666666, 7777777,\n"
               "                 1, 22, 333, 4444, 55555, //\n"
               "                 1, 22, 333, 4444, 55555, 666666, 7777777,\n"
               "                 1, 22, 333, 4444, 55555, 666666, 7777777};");
  verifyFormat(
      "vector<int> x = {1,       22, 333, 4444, 55555, 666666, 7777777,\n"
      "                 1,       22, 333, 4444, 55555, 666666, 7777777,\n"
      "                 1,       22, 333, 4444, 55555, 666666, // comment\n"
      "                 7777777, 1,  22,  333,  4444,  55555,  666666,\n"
      "                 7777777, 1,  22,  333,  4444,  55555,  666666,\n"
      "                 7777777, 1,  22,  333,  4444,  55555,  666666,\n"
      "                 7777777};");
  verifyFormat("static const uint16_t CallerSavedRegs64Bittttt[] = {\n"
               "    X86::RAX, X86::RDX, X86::RCX, X86::RSI, X86::RDI,\n"
               "    X86::R8,  X86::R9,  X86::R10, X86::R11, 0};");
  verifyFormat("static const uint16_t CallerSavedRegs64Bittttt[] = {\n"
               "    X86::RAX, X86::RDX, X86::RCX, X86::RSI, X86::RDI,\n"
               "    // Separating comment.\n"
               "    X86::R8, X86::R9, X86::R10, X86::R11, 0};");
  verifyFormat("static const uint16_t CallerSavedRegs64Bittttt[] = {\n"
               "    // Leading comment\n"
               "    X86::RAX, X86::RDX, X86::RCX, X86::RSI, X86::RDI,\n"
               "    X86::R8,  X86::R9,  X86::R10, X86::R11, 0};");
  verifyFormat("vector<int> x = {1, 1, 1, 1,\n"
               "                 1, 1, 1, 1};",
               getLLVMStyleWithColumns(39));
  verifyFormat("vector<int> x = {1, 1, 1, 1,\n"
               "                 1, 1, 1, 1};",
               getLLVMStyleWithColumns(38));
  verifyFormat("vector<int> aaaaaaaaaaaaaaaaaaaaaa = {\n"
               "    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1};",
               getLLVMStyleWithColumns(43));
  verifyFormat(
      "static unsigned SomeValues[10][3] = {\n"
      "    {1, 4, 0},  {4, 9, 0},  {4, 5, 9},  {8, 5, 4}, {1, 8, 4},\n"
      "    {10, 1, 6}, {11, 0, 9}, {2, 11, 9}, {5, 2, 9}, {11, 2, 7}};");
  verifyFormat("static auto fields = new vector<string>{\n"
               "    \"aaaaaaaaaaaaa\",\n"
               "    \"aaaaaaaaaaaaa\",\n"
               "    \"aaaaaaaaaaaa\",\n"
               "    \"aaaaaaaaaaaaaa\",\n"
               "    \"aaaaaaaaaaaaaaaaaaaaaaaaa\",\n"
               "    \"aaaaaaaaaaaa\",\n"
               "    \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\",\n"
               "};");
  verifyFormat("vector<int> x = {1, 2, 3, 4, aaaaaaaaaaaaaaaaa, 6};");
  verifyFormat("vector<int> x = {1, aaaaaaaaaaaaaaaaaaaaaa,\n"
               "                 2, bbbbbbbbbbbbbbbbbbbbbb,\n"
               "                 3, cccccccccccccccccccccc};",
               getLLVMStyleWithColumns(60));

  // Trailing commas.
  verifyFormat("vector<int> x = {\n"
               "    1, 1, 1, 1, 1, 1, 1, 1,\n"
               "};",
               getLLVMStyleWithColumns(39));
  verifyFormat("vector<int> x = {\n"
               "    1, 1, 1, 1, 1, 1, 1, 1, //\n"
               "};",
               getLLVMStyleWithColumns(39));
  verifyFormat("vector<int> x = {1, 1, 1, 1,\n"
               "                 1, 1, 1, 1,\n"
               "                 /**/ /**/};",
               getLLVMStyleWithColumns(39));

  // Trailing comment in the first line.
  verifyFormat("vector<int> iiiiiiiiiiiiiii = {                      //\n"
               "    1111111111, 2222222222, 33333333333, 4444444444, //\n"
               "    111111111,  222222222,  3333333333,  444444444,  //\n"
               "    11111111,   22222222,   333333333,   44444444};");
  // Trailing comment in the last line.
  verifyFormat("int aaaaa[] = {\n"
               "    1, 2, 3, // comment\n"
               "    4, 5, 6  // comment\n"
               "};");

  // With nested lists, we should either format one item per line or all nested
  // lists one on line.
  // FIXME: For some nested lists, we can do better.
  verifyFormat("return {{aaaaaaaaaaaaaaaaaaaaa},\n"
               "        {aaaaaaaaaaaaaaaaaaa},\n"
               "        {aaaaaaaaaaaaaaaaaaaaa},\n"
               "        {aaaaaaaaaaaaaaaaa}};",
               getLLVMStyleWithColumns(60));
  verifyFormat(
      "SomeStruct my_struct_array = {\n"
      "    {aaaaaa, aaaaaaaa, aaaaaaaaaa, aaaaaaaaa, aaaaaaaaa, aaaaaaaaaa,\n"
      "     aaaaaaaaaaaaa, aaaaaaa, aaa},\n"
      "    {aaa, aaa},\n"
      "    {aaa, aaa},\n"
      "    {aaaa, aaaa, aaaa, aaaa, aaaa, aaaa, aaaa, aaa},\n"
      "    {aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaa,\n"
      "     aaaaaaaaaaaa, a, aaaaaaaaaa, aaaaaaaaa, aaa}};");

  // No column layout should be used here.
  verifyFormat("aaaaaaaaaaaaaaa = {aaaaaaaaaaaaaaaaaaaaaaaaaaa, 0, 0,\n"
               "                   bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb};");

  verifyNoCrash("a<,");

  // No braced initializer here.
  verifyFormat("void f() {\n"
               "  struct Dummy {};\n"
               "  f(v);\n"
               "}");

  // Long lists should be formatted in columns even if they are nested.
  verifyFormat(
      "vector<int> x = function({1, 22, 333, 4444, 55555, 666666, 7777777,\n"
      "                          1, 22, 333, 4444, 55555, 666666, 7777777,\n"
      "                          1, 22, 333, 4444, 55555, 666666, 7777777,\n"
      "                          1, 22, 333, 4444, 55555, 666666, 7777777,\n"
      "                          1, 22, 333, 4444, 55555, 666666, 7777777,\n"
      "                          1, 22, 333, 4444, 55555, 666666, 7777777});");

  // Allow "single-column" layout even if that violates the column limit. There
  // isn't going to be a better way.
  verifyFormat("std::vector<int> a = {\n"
               "    aaaaaaaa,\n"
               "    aaaaaaaa,\n"
               "    aaaaaaaa,\n"
               "    aaaaaaaa,\n"
               "    aaaaaaaaaa,\n"
               "    aaaaaaaa,\n"
               "    aaaaaaaaaaaaaaaaaaaaaaaaaaa};",
               getLLVMStyleWithColumns(30));
  verifyFormat("vector<int> aaaa = {\n"
               "    aaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "    aaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,\n"
               "    aaaaaa.aaaaaaa,\n"
               "    aaaaaa.aaaaaaa,\n"
               "    aaaaaa.aaaaaaa,\n"
               "    aaaaaa.aaaaaaa,\n"
               "};");

  // Don't create hanging lists.
  verifyFormat("someFunction(Param,\n"
               "             {List1, List2,\n"
               "              List3});",
               getLLVMStyleWithColumns(35));
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaa, {},\n"
               "                               aaaaaaaaaaaaaaaaaaaaaaa);");
}

TEST_F(FormatTest, PullTrivialFunctionDefinitionsIntoSingleLine) {
  FormatStyle DoNotMerge = getLLVMStyle();
  DoNotMerge.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_None;

  verifyFormat("void f() { return 42; }");
  verifyFormat("void f() {\n"
               "  return 42;\n"
               "}",
               DoNotMerge);
  verifyFormat("void f() {\n"
               "  // Comment\n"
               "}");
  verifyFormat("{\n"
               "#error {\n"
               "  int a;\n"
               "}");
  verifyFormat("{\n"
               "  int a;\n"
               "#error {\n"
               "}");
  verifyFormat("void f() {} // comment");
  verifyFormat("void f() { int a; } // comment");
  verifyFormat("void f() {\n"
               "} // comment",
               DoNotMerge);
  verifyFormat("void f() {\n"
               "  int a;\n"
               "} // comment",
               DoNotMerge);
  verifyFormat("void f() {\n"
               "} // comment",
               getLLVMStyleWithColumns(15));

  verifyFormat("void f() { return 42; }", getLLVMStyleWithColumns(23));
  verifyFormat("void f() {\n  return 42;\n}", getLLVMStyleWithColumns(22));

  verifyFormat("void f() {}", getLLVMStyleWithColumns(11));
  verifyFormat("void f() {\n}", getLLVMStyleWithColumns(10));
  verifyFormat("class C {\n"
               "  C()\n"
               "      : iiiiiiii(nullptr),\n"
               "        kkkkkkk(nullptr),\n"
               "        mmmmmmm(nullptr),\n"
               "        nnnnnnn(nullptr) {}\n"
               "};",
               getGoogleStyle());

  FormatStyle NoColumnLimit = getLLVMStyle();
  NoColumnLimit.ColumnLimit = 0;
  EXPECT_EQ("A() : b(0) {}", format("A():b(0){}", NoColumnLimit));
  EXPECT_EQ("class C {\n"
            "  A() : b(0) {}\n"
            "};",
            format("class C{A():b(0){}};", NoColumnLimit));
  EXPECT_EQ("A()\n"
            "    : b(0) {\n"
            "}",
            format("A()\n:b(0)\n{\n}", NoColumnLimit));

  FormatStyle DoNotMergeNoColumnLimit = NoColumnLimit;
  DoNotMergeNoColumnLimit.AllowShortFunctionsOnASingleLine =
      FormatStyle::SFS_None;
  EXPECT_EQ("A()\n"
            "    : b(0) {\n"
            "}",
            format("A():b(0){}", DoNotMergeNoColumnLimit));
  EXPECT_EQ("A()\n"
            "    : b(0) {\n"
            "}",
            format("A()\n:b(0)\n{\n}", DoNotMergeNoColumnLimit));

  verifyFormat("#define A          \\\n"
               "  void f() {       \\\n"
               "    int i;         \\\n"
               "  }",
               getLLVMStyleWithColumns(20));
  verifyFormat("#define A           \\\n"
               "  void f() { int i; }",
               getLLVMStyleWithColumns(21));
  verifyFormat("#define A            \\\n"
               "  void f() {         \\\n"
               "    int i;           \\\n"
               "  }                  \\\n"
               "  int j;",
               getLLVMStyleWithColumns(22));
  verifyFormat("#define A             \\\n"
               "  void f() { int i; } \\\n"
               "  int j;",
               getLLVMStyleWithColumns(23));
}

TEST_F(FormatTest, PullInlineFunctionDefinitionsIntoSingleLine) {
  FormatStyle MergeInlineOnly = getLLVMStyle();
  MergeInlineOnly.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Inline;
  verifyFormat("class C {\n"
               "  int f() { return 42; }\n"
               "};",
               MergeInlineOnly);
  verifyFormat("int f() {\n"
               "  return 42;\n"
               "}",
               MergeInlineOnly);
}

TEST_F(FormatTest, UnderstandContextOfRecordTypeKeywords) {
  // Elaborate type variable declarations.
  verifyFormat("struct foo a = {bar};\nint n;");
  verifyFormat("class foo a = {bar};\nint n;");
  verifyFormat("union foo a = {bar};\nint n;");

  // Elaborate types inside function definitions.
  verifyFormat("struct foo f() {}\nint n;");
  verifyFormat("class foo f() {}\nint n;");
  verifyFormat("union foo f() {}\nint n;");

  // Templates.
  verifyFormat("template <class X> void f() {}\nint n;");
  verifyFormat("template <struct X> void f() {}\nint n;");
  verifyFormat("template <union X> void f() {}\nint n;");

  // Actual definitions...
  verifyFormat("struct {\n} n;");
  verifyFormat(
      "template <template <class T, class Y>, class Z> class X {\n} n;");
  verifyFormat("union Z {\n  int n;\n} x;");
  verifyFormat("class MACRO Z {\n} n;");
  verifyFormat("class MACRO(X) Z {\n} n;");
  verifyFormat("class __attribute__(X) Z {\n} n;");
  verifyFormat("class __declspec(X) Z {\n} n;");
  verifyFormat("class A##B##C {\n} n;");
  verifyFormat("class alignas(16) Z {\n} n;");
  verifyFormat("class MACRO(X) alignas(16) Z {\n} n;");
  verifyFormat("class MACROA MACRO(X) Z {\n} n;");

  // Redefinition from nested context:
  verifyFormat("class A::B::C {\n} n;");

  // Template definitions.
  verifyFormat(
      "template <typename F>\n"
      "Matcher(const Matcher<F> &Other,\n"
      "        typename enable_if_c<is_base_of<F, T>::value &&\n"
      "                             !is_same<F, T>::value>::type * = 0)\n"
      "    : Implementation(new ImplicitCastMatcher<F>(Other)) {}");

  // FIXME: This is still incorrectly handled at the formatter side.
  verifyFormat("template <> struct X < 15, i<3 && 42 < 50 && 33 < 28> {};");
  verifyFormat("int i = SomeFunction(a<b, a> b);");

  // FIXME:
  // This now gets parsed incorrectly as class definition.
  // verifyFormat("class A<int> f() {\n}\nint n;");

  // Elaborate types where incorrectly parsing the structural element would
  // break the indent.
  verifyFormat("if (true)\n"
               "  class X x;\n"
               "else\n"
               "  f();\n");

  // This is simply incomplete. Formatting is not important, but must not crash.
  verifyFormat("class A:");
}

TEST_F(FormatTest, DoNotInterfereWithErrorAndWarning) {
  EXPECT_EQ("#error Leave     all         white!!!!! space* alone!\n",
            format("#error Leave     all         white!!!!! space* alone!\n"));
  EXPECT_EQ(
      "#warning Leave     all         white!!!!! space* alone!\n",
      format("#warning Leave     all         white!!!!! space* alone!\n"));
  EXPECT_EQ("#error 1", format("  #  error   1"));
  EXPECT_EQ("#warning 1", format("  #  warning 1"));
}

TEST_F(FormatTest, FormatHashIfExpressions) {
  verifyFormat("#if AAAA && BBBB");
  verifyFormat("#if (AAAA && BBBB)");
  verifyFormat("#elif (AAAA && BBBB)");
  // FIXME: Come up with a better indentation for #elif.
  verifyFormat(
      "#if !defined(AAAAAAA) && (defined CCCCCC || defined DDDDDD) &&  \\\n"
      "    defined(BBBBBBBB)\n"
      "#elif !defined(AAAAAA) && (defined CCCCC || defined DDDDDD) &&  \\\n"
      "    defined(BBBBBBBB)\n"
      "#endif",
      getLLVMStyleWithColumns(65));
}

TEST_F(FormatTest, MergeHandlingInTheFaceOfPreprocessorDirectives) {
  FormatStyle AllowsMergedIf = getGoogleStyle();
  AllowsMergedIf.AllowShortIfStatementsOnASingleLine = true;
  verifyFormat("void f() { f(); }\n#error E", AllowsMergedIf);
  verifyFormat("if (true) return 42;\n#error E", AllowsMergedIf);
  verifyFormat("if (true)\n#error E\n  return 42;", AllowsMergedIf);
  EXPECT_EQ("if (true) return 42;",
            format("if (true)\nreturn 42;", AllowsMergedIf));
  FormatStyle ShortMergedIf = AllowsMergedIf;
  ShortMergedIf.ColumnLimit = 25;
  verifyFormat("#define A \\\n"
               "  if (true) return 42;",
               ShortMergedIf);
  verifyFormat("#define A \\\n"
               "  f();    \\\n"
               "  if (true)\n"
               "#define B",
               ShortMergedIf);
  verifyFormat("#define A \\\n"
               "  f();    \\\n"
               "  if (true)\n"
               "g();",
               ShortMergedIf);
  verifyFormat("{\n"
               "#ifdef A\n"
               "  // Comment\n"
               "  if (true) continue;\n"
               "#endif\n"
               "  // Comment\n"
               "  if (true) continue;\n"
               "}",
               ShortMergedIf);
  ShortMergedIf.ColumnLimit = 29;
  verifyFormat("#define A                   \\\n"
               "  if (aaaaaaaaaa) return 1; \\\n"
               "  return 2;",
               ShortMergedIf);
  ShortMergedIf.ColumnLimit = 28;
  verifyFormat("#define A         \\\n"
               "  if (aaaaaaaaaa) \\\n"
               "    return 1;     \\\n"
               "  return 2;",
               ShortMergedIf);
}

TEST_F(FormatTest, BlockCommentsInControlLoops) {
  verifyFormat("if (0) /* a comment in a strange place */ {\n"
               "  f();\n"
               "}");
  verifyFormat("if (0) /* a comment in a strange place */ {\n"
               "  f();\n"
               "} /* another comment */ else /* comment #3 */ {\n"
               "  g();\n"
               "}");
  verifyFormat("while (0) /* a comment in a strange place */ {\n"
               "  f();\n"
               "}");
  verifyFormat("for (;;) /* a comment in a strange place */ {\n"
               "  f();\n"
               "}");
  verifyFormat("do /* a comment in a strange place */ {\n"
               "  f();\n"
               "} /* another comment */ while (0);");
}

TEST_F(FormatTest, BlockComments) {
  EXPECT_EQ("/* */ /* */ /* */\n/* */ /* */ /* */",
            format("/* *//* */  /* */\n/* *//* */  /* */"));
  EXPECT_EQ("/* */ a /* */ b;", format("  /* */  a/* */  b;"));
  EXPECT_EQ("#define A /*123*/ \\\n"
            "  b\n"
            "/* */\n"
            "someCall(\n"
            "    parameter);",
            format("#define A /*123*/ b\n"
                   "/* */\n"
                   "someCall(parameter);",
                   getLLVMStyleWithColumns(15)));

  EXPECT_EQ("#define A\n"
            "/* */ someCall(\n"
            "    parameter);",
            format("#define A\n"
                   "/* */someCall(parameter);",
                   getLLVMStyleWithColumns(15)));
  EXPECT_EQ("/*\n**\n*/", format("/*\n**\n*/"));
  EXPECT_EQ("/*\n"
            "*\n"
            " * aaaaaa\n"
            " * aaaaaa\n"
            "*/",
            format("/*\n"
                   "*\n"
                   " * aaaaaa aaaaaa\n"
                   "*/",
                   getLLVMStyleWithColumns(10)));
  EXPECT_EQ("/*\n"
            "**\n"
            "* aaaaaa\n"
            "*aaaaaa\n"
            "*/",
            format("/*\n"
                   "**\n"
                   "* aaaaaa aaaaaa\n"
                   "*/",
                   getLLVMStyleWithColumns(10)));
  EXPECT_EQ("int aaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
            "    /* line 1\n"
            "       bbbbbbbbbbbb */\n"
            "    bbbbbbbbbbbbbbbbbbbbbbbbbbbb;",
            format("int aaaaaaaaaaaaaaaaaaaaaaaaaaaa =\n"
                   "    /* line 1\n"
                   "       bbbbbbbbbbbb */ bbbbbbbbbbbbbbbbbbbbbbbbbbbb;",
            getLLVMStyleWithColumns(50)));

  FormatStyle NoBinPacking = getLLVMStyle();
  NoBinPacking.BinPackParameters = false;
  EXPECT_EQ("someFunction(1, /* comment 1 */\n"
            "             2, /* comment 2 */\n"
            "             3, /* comment 3 */\n"
            "             aaaa,\n"
            "             bbbb);",
            format("someFunction (1,   /* comment 1 */\n"
                   "                2, /* comment 2 */  \n"
                   "               3,   /* comment 3 */\n"
                   "aaaa, bbbb );",
                   NoBinPacking));
  verifyFormat(
      "bool aaaaaaaaaaaaa = /* comment: */ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
      "                     aaaaaaaaaaaaaaaaaaaaaaaaaaaa;");
  EXPECT_EQ(
      "bool aaaaaaaaaaaaa = /* trailing comment */\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaa || aaaaaaaaaaaaaaaaaaaaaaaaa ||\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaa || aaaaaaaaaaaaaaaaaaaaaaaaaa;",
      format(
          "bool       aaaaaaaaaaaaa =       /* trailing comment */\n"
          "    aaaaaaaaaaaaaaaaaaaaaaaaaaa||aaaaaaaaaaaaaaaaaaaaaaaaa    ||\n"
          "    aaaaaaaaaaaaaaaaaaaaaaaaaaaa   || aaaaaaaaaaaaaaaaaaaaaaaaaa;"));
  EXPECT_EQ(
      "int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; /* comment */\n"
      "int bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;   /* comment */\n"
      "int cccccccccccccccccccccccccccccc;       /* comment */\n",
      format("int aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa; /* comment */\n"
             "int      bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb; /* comment */\n"
             "int    cccccccccccccccccccccccccccccc;  /* comment */\n"));

  verifyFormat("void f(int * /* unused */) {}");

  EXPECT_EQ("/*\n"
            " **\n"
            " */",
            format("/*\n"
                   " **\n"
                   " */"));
  EXPECT_EQ("/*\n"
            " *q\n"
            " */",
            format("/*\n"
                   " *q\n"
                   " */"));
  EXPECT_EQ("/*\n"
            " * q\n"
            " */",
            format("/*\n"
                   " * q\n"
                   " */"));
  EXPECT_EQ("/*\n"
            " **/",
            format("/*\n"
                   " **/"));
  EXPECT_EQ("/*\n"
            " ***/",
            format("/*\n"
                   " ***/"));
}

TEST_F(FormatTest, BlockCommentsInMacros) {
  EXPECT_EQ("#define A          \\\n"
            "  {                \\\n"
            "    /* one line */ \\\n"
            "    someCall();",
            format("#define A {        \\\n"
                   "  /* one line */   \\\n"
                   "  someCall();",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ("#define A          \\\n"
            "  {                \\\n"
            "    /* previous */ \\\n"
            "    /* one line */ \\\n"
            "    someCall();",
            format("#define A {        \\\n"
                   "  /* previous */   \\\n"
                   "  /* one line */   \\\n"
                   "  someCall();",
                   getLLVMStyleWithColumns(20)));
}

TEST_F(FormatTest, BlockCommentsAtEndOfLine) {
  EXPECT_EQ("a = {\n"
            "    1111 /*    */\n"
            "};",
            format("a = {1111 /*    */\n"
                   "};",
                   getLLVMStyleWithColumns(15)));
  EXPECT_EQ("a = {\n"
            "    1111 /*      */\n"
            "};",
            format("a = {1111 /*      */\n"
                   "};",
                   getLLVMStyleWithColumns(15)));
  EXPECT_EQ("a = {\n"
            "    1111 /*      a\n"
            "          */\n"
            "};",
            format("a = {1111 /*      a */\n"
                   "};",
                   getLLVMStyleWithColumns(15)));
}

TEST_F(FormatTest, IndentLineCommentsInStartOfBlockAtEndOfFile) {
  verifyFormat("{\n"
               "  // a\n"
               "  // b");
}

TEST_F(FormatTest, FormatStarDependingOnContext) {
  verifyFormat("void f(int *a);");
  verifyFormat("void f() { f(fint * b); }");
  verifyFormat("class A {\n  void f(int *a);\n};");
  verifyFormat("class A {\n  int *a;\n};");
  verifyFormat("namespace a {\n"
               "namespace b {\n"
               "class A {\n"
               "  void f() {}\n"
               "  int *a;\n"
               "};\n"
               "}\n"
               "}");
}

TEST_F(FormatTest, SpecialTokensAtEndOfLine) {
  verifyFormat("while");
  verifyFormat("operator");
}

TEST_F(FormatTest, SkipsDeeplyNestedLines) {
  // This code would be painfully slow to format if we didn't skip it.
  std::string Code("A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(\n" // 20x
                   "A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(\n"
                   "A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(\n"
                   "A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(\n"
                   "A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(A(\n"
                   "A(1, 1)\n"
                   ", 1), 1), 1), 1), 1), 1), 1), 1), 1), 1)\n" // 10x
                   ", 1), 1), 1), 1), 1), 1), 1), 1), 1), 1)\n"
                   ", 1), 1), 1), 1), 1), 1), 1), 1), 1), 1)\n"
                   ", 1), 1), 1), 1), 1), 1), 1), 1), 1), 1)\n"
                   ", 1), 1), 1), 1), 1), 1), 1), 1), 1), 1)\n"
                   ", 1), 1), 1), 1), 1), 1), 1), 1), 1), 1)\n"
                   ", 1), 1), 1), 1), 1), 1), 1), 1), 1), 1)\n"
                   ", 1), 1), 1), 1), 1), 1), 1), 1), 1), 1)\n"
                   ", 1), 1), 1), 1), 1), 1), 1), 1), 1), 1)\n"
                   ", 1), 1), 1), 1), 1), 1), 1), 1), 1), 1);\n");
  // Deeply nested part is untouched, rest is formatted.
  EXPECT_EQ(std::string("int i;\n") + Code + "int j;\n",
            format(std::string("int    i;\n") + Code + "int    j;\n",
                   getLLVMStyle(), IC_ExpectIncomplete));
}

//===----------------------------------------------------------------------===//
// Objective-C tests.
//===----------------------------------------------------------------------===//

TEST_F(FormatTest, FormatForObjectiveCMethodDecls) {
  verifyFormat("- (void)sendAction:(SEL)aSelector to:(BOOL)anObject;");
  EXPECT_EQ("- (NSUInteger)indexOfObject:(id)anObject;",
            format("-(NSUInteger)indexOfObject:(id)anObject;"));
  EXPECT_EQ("- (NSInteger)Mthod1;", format("-(NSInteger)Mthod1;"));
  EXPECT_EQ("+ (id)Mthod2;", format("+(id)Mthod2;"));
  EXPECT_EQ("- (NSInteger)Method3:(id)anObject;",
            format("-(NSInteger)Method3:(id)anObject;"));
  EXPECT_EQ("- (NSInteger)Method4:(id)anObject;",
            format("-(NSInteger)Method4:(id)anObject;"));
  EXPECT_EQ("- (NSInteger)Method5:(id)anObject:(id)AnotherObject;",
            format("-(NSInteger)Method5:(id)anObject:(id)AnotherObject;"));
  EXPECT_EQ("- (id)Method6:(id)A:(id)B:(id)C:(id)D;",
            format("- (id)Method6:(id)A:(id)B:(id)C:(id)D;"));
  EXPECT_EQ("- (void)sendAction:(SEL)aSelector to:(id)anObject "
            "forAllCells:(BOOL)flag;",
            format("- (void)sendAction:(SEL)aSelector to:(id)anObject "
                   "forAllCells:(BOOL)flag;"));

  // Very long objectiveC method declaration.
  verifyFormat("- (void)aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa:\n"
               "    (SoooooooooooooooooooooomeType *)bbbbbbbbbb;");
  verifyFormat("- (NSUInteger)indexOfObject:(id)anObject\n"
               "                    inRange:(NSRange)range\n"
               "                   outRange:(NSRange)out_range\n"
               "                  outRange1:(NSRange)out_range1\n"
               "                  outRange2:(NSRange)out_range2\n"
               "                  outRange3:(NSRange)out_range3\n"
               "                  outRange4:(NSRange)out_range4\n"
               "                  outRange5:(NSRange)out_range5\n"
               "                  outRange6:(NSRange)out_range6\n"
               "                  outRange7:(NSRange)out_range7\n"
               "                  outRange8:(NSRange)out_range8\n"
               "                  outRange9:(NSRange)out_range9;");

  // When the function name has to be wrapped.
  FormatStyle Style = getLLVMStyle();
  Style.IndentWrappedFunctionNames = false;
  verifyFormat("- (SomeLooooooooooooooooooooongType *)\n"
               "veryLooooooooooongName:(NSString)aaaaaaaaaaaaaa\n"
               "           anotherName:(NSString)bbbbbbbbbbbbbb {\n"
               "}",
               Style);
  Style.IndentWrappedFunctionNames = true;
  verifyFormat("- (SomeLooooooooooooooooooooongType *)\n"
               "    veryLooooooooooongName:(NSString)aaaaaaaaaaaaaa\n"
               "               anotherName:(NSString)bbbbbbbbbbbbbb {\n"
               "}",
               Style);

  verifyFormat("- (int)sum:(vector<int>)numbers;");
  verifyGoogleFormat("- (void)setDelegate:(id<Protocol>)delegate;");
  // FIXME: In LLVM style, there should be a space in front of a '<' for ObjC
  // protocol lists (but not for template classes):
  // verifyFormat("- (void)setDelegate:(id <Protocol>)delegate;");

  verifyFormat("- (int (*)())foo:(int (*)())f;");
  verifyGoogleFormat("- (int (*)())foo:(int (*)())foo;");

  // If there's no return type (very rare in practice!), LLVM and Google style
  // agree.
  verifyFormat("- foo;");
  verifyFormat("- foo:(int)f;");
  verifyGoogleFormat("- foo:(int)foo;");
}


TEST_F(FormatTest, BreaksStringLiterals) {
  EXPECT_EQ("\"some text \"\n"
            "\"other\";",
            format("\"some text other\";", getLLVMStyleWithColumns(12)));
  EXPECT_EQ("\"some text \"\n"
            "\"other\";",
            format("\\\n\"some text other\";", getLLVMStyleWithColumns(12)));
  EXPECT_EQ(
      "#define A  \\\n"
      "  \"some \"  \\\n"
      "  \"text \"  \\\n"
      "  \"other\";",
      format("#define A \"some text other\";", getLLVMStyleWithColumns(12)));
  EXPECT_EQ(
      "#define A  \\\n"
      "  \"so \"    \\\n"
      "  \"text \"  \\\n"
      "  \"other\";",
      format("#define A \"so text other\";", getLLVMStyleWithColumns(12)));

  EXPECT_EQ("\"some text\"",
            format("\"some text\"", getLLVMStyleWithColumns(1)));
  EXPECT_EQ("\"some text\"",
            format("\"some text\"", getLLVMStyleWithColumns(11)));
  EXPECT_EQ("\"some \"\n"
            "\"text\"",
            format("\"some text\"", getLLVMStyleWithColumns(10)));
  EXPECT_EQ("\"some \"\n"
            "\"text\"",
            format("\"some text\"", getLLVMStyleWithColumns(7)));
  EXPECT_EQ("\"some\"\n"
            "\" tex\"\n"
            "\"t\"",
            format("\"some text\"", getLLVMStyleWithColumns(6)));
  EXPECT_EQ("\"some\"\n"
            "\" tex\"\n"
            "\" and\"",
            format("\"some tex and\"", getLLVMStyleWithColumns(6)));
  EXPECT_EQ("\"some\"\n"
            "\"/tex\"\n"
            "\"/and\"",
            format("\"some/tex/and\"", getLLVMStyleWithColumns(6)));

  EXPECT_EQ("variable =\n"
            "    \"long string \"\n"
            "    \"literal\";",
            format("variable = \"long string literal\";",
                   getLLVMStyleWithColumns(20)));

  EXPECT_EQ("variable = f(\n"
            "    \"long string \"\n"
            "    \"literal\",\n"
            "    short,\n"
            "    loooooooooooooooooooong);",
            format("variable = f(\"long string literal\", short, "
                   "loooooooooooooooooooong);",
                   getLLVMStyleWithColumns(20)));

  EXPECT_EQ(
      "f(g(\"long string \"\n"
      "    \"literal\"),\n"
      "  b);",
      format("f(g(\"long string literal\"), b);", getLLVMStyleWithColumns(20)));
  EXPECT_EQ("f(g(\"long string \"\n"
            "    \"literal\",\n"
            "    a),\n"
            "  b);",
            format("f(g(\"long string literal\", a), b);",
                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ(
      "f(\"one two\".split(\n"
      "    variable));",
      format("f(\"one two\".split(variable));", getLLVMStyleWithColumns(20)));
  EXPECT_EQ("f(\"one two three four five six \"\n"
            "  \"seven\".split(\n"
            "      really_looooong_variable));",
            format("f(\"one two three four five six seven\"."
                   "split(really_looooong_variable));",
                   getLLVMStyleWithColumns(33)));

  EXPECT_EQ("f(\"some \"\n"
            "  \"text\",\n"
            "  other);",
            format("f(\"some text\", other);", getLLVMStyleWithColumns(10)));

  // Only break as a last resort.
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaa(\n"
      "    aaaaaaaaaaaaaaaaaaaa,\n"
      "    aaaaaa(\"aaa aaaaa aaa aaa aaaaa aaa aaaaa aaa aaa aaaaaa\"));");

  EXPECT_EQ("\"splitmea\"\n"
            "\"trandomp\"\n"
            "\"oint\"",
            format("\"splitmeatrandompoint\"", getLLVMStyleWithColumns(10)));

  EXPECT_EQ("\"split/\"\n"
            "\"pathat/\"\n"
            "\"slashes\"",
            format("\"split/pathat/slashes\"", getLLVMStyleWithColumns(10)));

  EXPECT_EQ("\"split/\"\n"
            "\"pathat/\"\n"
            "\"slashes\"",
            format("\"split/pathat/slashes\"", getLLVMStyleWithColumns(10)));
  EXPECT_EQ("\"split at \"\n"
            "\"spaces/at/\"\n"
            "\"slashes.at.any$\"\n"
            "\"non-alphanumeric%\"\n"
            "\"1111111111characte\"\n"
            "\"rs\"",
            format("\"split at "
                   "spaces/at/"
                   "slashes.at."
                   "any$non-"
                   "alphanumeric%"
                   "1111111111characte"
                   "rs\"",
                   getLLVMStyleWithColumns(20)));

  // Verify that splitting the strings understands
  // Style::AlwaysBreakBeforeMultilineStrings.
  EXPECT_EQ(
      "aaaaaaaaaaaa(\n"
      "    \"aaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaa \"\n"
      "    \"aaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaa\");",
      format("aaaaaaaaaaaa(\"aaaaaaaaaaaaaaaaaaaaaaaaaa "
             "aaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaa "
             "aaaaaaaaaaaaaaaaaaaaaa\");",
             getGoogleStyle()));
  EXPECT_EQ("return \"aaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaa \"\n"
            "       \"aaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaa\";",
            format("return \"aaaaaaaaaaaaaaaaaaaaaa "
                   "aaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaa "
                   "aaaaaaaaaaaaaaaaaaaaaa\";",
                   getGoogleStyle()));
  EXPECT_EQ("llvm::outs() << \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa \"\n"
            "                \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\";",
            format("llvm::outs() << "
                   "\"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaa"
                   "aaaaaaaaaaaaaaaaaaa\";"));
  EXPECT_EQ("ffff(\n"
            "    {\"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa \"\n"
            "     \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"});",
            format("ffff({\"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa "
                   "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"});",
                   getGoogleStyle()));

  FormatStyle Style = getLLVMStyleWithColumns(12);
  Style.BreakStringLiterals = false;
  EXPECT_EQ("\"some text other\";", format("\"some text other\";", Style));

  FormatStyle AlignLeft = getLLVMStyleWithColumns(12);
  AlignLeft.AlignEscapedNewlinesLeft = true;
  EXPECT_EQ("#define A \\\n"
            "  \"some \" \\\n"
            "  \"text \" \\\n"
            "  \"other\";",
            format("#define A \"some text other\";", AlignLeft));
}

TEST_F(FormatTest, FullyRemoveEmptyLines) {
  FormatStyle NoEmptyLines = getLLVMStyleWithColumns(80);
  NoEmptyLines.MaxEmptyLinesToKeep = 0;
  EXPECT_EQ("int i = a(b());",
            format("int i=a(\n\n b(\n\n\n )\n\n);", NoEmptyLines));
}

TEST_F(FormatTest, BreaksStringLiteralsWithTabs) {
  EXPECT_EQ(
      "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
      "(\n"
      "    \"x\t\");",
      format("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
             "aaaaaaa("
             "\"x\t\");"));
}

TEST_F(FormatTest, BreaksWideAndNSStringLiterals) {
  EXPECT_EQ(
      "u8\"utf8 string \"\n"
      "u8\"literal\";",
      format("u8\"utf8 string literal\";", getGoogleStyleWithColumns(16)));
  EXPECT_EQ(
      "u\"utf16 string \"\n"
      "u\"literal\";",
      format("u\"utf16 string literal\";", getGoogleStyleWithColumns(16)));
  EXPECT_EQ(
      "U\"utf32 string \"\n"
      "U\"literal\";",
      format("U\"utf32 string literal\";", getGoogleStyleWithColumns(16)));
  EXPECT_EQ("L\"wide string \"\n"
            "L\"literal\";",
            format("L\"wide string literal\";", getGoogleStyleWithColumns(16)));
  EXPECT_EQ("@\"NSString \"\n"
            "@\"literal\";",
            format("@\"NSString literal\";", getGoogleStyleWithColumns(19)));

  // This input makes clang-format try to split the incomplete unicode escape
  // sequence, which used to lead to a crasher.
  verifyNoCrash(
      "aaaaaaaaaaaaaaaaaaaa = L\"\\udff\"'; // aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
      getLLVMStyleWithColumns(60));
}

TEST_F(FormatTest, DoesNotBreakRawStringLiterals) {
  FormatStyle Style = getGoogleStyleWithColumns(15);
  EXPECT_EQ("R\"x(raw literal)x\";", format("R\"x(raw literal)x\";", Style));
  EXPECT_EQ("uR\"x(raw literal)x\";", format("uR\"x(raw literal)x\";", Style));
  EXPECT_EQ("LR\"x(raw literal)x\";", format("LR\"x(raw literal)x\";", Style));
  EXPECT_EQ("UR\"x(raw literal)x\";", format("UR\"x(raw literal)x\";", Style));
  EXPECT_EQ("u8R\"x(raw literal)x\";",
            format("u8R\"x(raw literal)x\";", Style));
}

TEST_F(FormatTest, BreaksStringLiteralsWithin_TMacro) {
  FormatStyle Style = getLLVMStyleWithColumns(20);
  EXPECT_EQ(
      "_T(\"aaaaaaaaaaaaaa\")\n"
      "_T(\"aaaaaaaaaaaaaa\")\n"
      "_T(\"aaaaaaaaaaaa\")",
      format("  _T(\"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\")", Style));
  EXPECT_EQ("f(x, _T(\"aaaaaaaaa\")\n"
            "     _T(\"aaaaaa\"),\n"
            "  z);",
            format("f(x, _T(\"aaaaaaaaaaaaaaa\"), z);", Style));

  // FIXME: Handle embedded spaces in one iteration.
  //  EXPECT_EQ("_T(\"aaaaaaaaaaaaa\")\n"
  //            "_T(\"aaaaaaaaaaaaa\")\n"
  //            "_T(\"aaaaaaaaaaaaa\")\n"
  //            "_T(\"a\")",
  //            format("  _T ( \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\" )",
  //                   getLLVMStyleWithColumns(20)));
  EXPECT_EQ(
      "_T ( \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\" )",
      format("  _T ( \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\" )", Style));
  EXPECT_EQ("f(\n"
            "#if !TEST\n"
            "    _T(\"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXn\")\n"
            "#endif\n"
            "    );",
            format("f(\n"
                   "#if !TEST\n"
                   "_T(\"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXn\")\n"
                   "#endif\n"
                   ");"));
  EXPECT_EQ("f(\n"
            "\n"
            "    _T(\"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXn\"));",
            format("f(\n"
                   "\n"
                   "_T(\"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXn\"));"));
}

TEST_F(FormatTest, DontSplitStringLiteralsWithEscapedNewlines) {
  EXPECT_EQ(
      "aaaaaaaaaaa = \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\\n"
      "  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\\n"
      "  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\";",
      format("aaaaaaaaaaa  =  \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\\n"
             "  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\\\n"
             "  aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\";"));
}

TEST_F(FormatTest, CountsCharactersInMultilineRawStringLiterals) {
  EXPECT_EQ("f(g(R\"x(raw literal)x\", a), b);",
            format("f(g(R\"x(raw literal)x\",   a), b);", getGoogleStyle()));
  EXPECT_EQ("fffffffffff(g(R\"x(\n"
            "multiline raw string literal xxxxxxxxxxxxxx\n"
            ")x\",\n"
            "              a),\n"
            "            b);",
            format("fffffffffff(g(R\"x(\n"
                   "multiline raw string literal xxxxxxxxxxxxxx\n"
                   ")x\", a), b);",
                   getGoogleStyleWithColumns(20)));
  EXPECT_EQ("fffffffffff(\n"
            "    g(R\"x(qqq\n"
            "multiline raw string literal xxxxxxxxxxxxxx\n"
            ")x\",\n"
            "      a),\n"
            "    b);",
            format("fffffffffff(g(R\"x(qqq\n"
                   "multiline raw string literal xxxxxxxxxxxxxx\n"
                   ")x\", a), b);",
                   getGoogleStyleWithColumns(20)));

  EXPECT_EQ("fffffffffff(R\"x(\n"
            "multiline raw string literal xxxxxxxxxxxxxx\n"
            ")x\");",
            format("fffffffffff(R\"x(\n"
                   "multiline raw string literal xxxxxxxxxxxxxx\n"
                   ")x\");",
                   getGoogleStyleWithColumns(20)));
  EXPECT_EQ("fffffffffff(R\"x(\n"
            "multiline raw string literal xxxxxxxxxxxxxx\n"
            ")x\" + bbbbbb);",
            format("fffffffffff(R\"x(\n"
                   "multiline raw string literal xxxxxxxxxxxxxx\n"
                   ")x\" +   bbbbbb);",
                   getGoogleStyleWithColumns(20)));
  EXPECT_EQ("fffffffffff(\n"
            "    R\"x(\n"
            "multiline raw string literal xxxxxxxxxxxxxx\n"
            ")x\" +\n"
            "    bbbbbb);",
            format("fffffffffff(\n"
                   " R\"x(\n"
                   "multiline raw string literal xxxxxxxxxxxxxx\n"
                   ")x\" + bbbbbb);",
                   getGoogleStyleWithColumns(20)));
}

TEST_F(FormatTest, SkipsUnknownStringLiterals) {
  verifyFormat("string a = \"unterminated;");
  EXPECT_EQ("function(\"unterminated,\n"
            "         OtherParameter);",
            format("function(  \"unterminated,\n"
                   "    OtherParameter);"));
}

TEST_F(FormatTest, DoesNotTryToParseUDLiteralsInPreCpp11Code) {
  FormatStyle Style = getLLVMStyle();
  Style.Standard = FormatStyle::LS_Cpp03;
  EXPECT_EQ("#define x(_a) printf(\"foo\" _a);",
            format("#define x(_a) printf(\"foo\"_a);", Style));
}

TEST_F(FormatTest, UnderstandsCpp1y) { verifyFormat("int bi{1'000'000};"); }

TEST_F(FormatTest, BreakStringLiteralsBeforeUnbreakableTokenSequence) {
  EXPECT_EQ("someFunction(\"aaabbbcccd\"\n"
            "             \"ddeeefff\");",
            format("someFunction(\"aaabbbcccdddeeefff\");",
                   getLLVMStyleWithColumns(25)));
  EXPECT_EQ("someFunction1234567890(\n"
            "    \"aaabbbcccdddeeefff\");",
            format("someFunction1234567890(\"aaabbbcccdddeeefff\");",
                   getLLVMStyleWithColumns(26)));
  EXPECT_EQ("someFunction1234567890(\n"
            "    \"aaabbbcccdddeeeff\"\n"
            "    \"f\");",
            format("someFunction1234567890(\"aaabbbcccdddeeefff\");",
                   getLLVMStyleWithColumns(25)));
  EXPECT_EQ("someFunction1234567890(\n"
            "    \"aaabbbcccdddeeeff\"\n"
            "    \"f\");",
            format("someFunction1234567890(\"aaabbbcccdddeeefff\");",
                   getLLVMStyleWithColumns(24)));
  EXPECT_EQ("someFunction(\"aaabbbcc \"\n"
            "             \"ddde \"\n"
            "             \"efff\");",
            format("someFunction(\"aaabbbcc ddde efff\");",
                   getLLVMStyleWithColumns(25)));
  EXPECT_EQ("someFunction(\"aaabbbccc \"\n"
            "             \"ddeeefff\");",
            format("someFunction(\"aaabbbccc ddeeefff\");",
                   getLLVMStyleWithColumns(25)));
  EXPECT_EQ("someFunction1234567890(\n"
            "    \"aaabb \"\n"
            "    \"cccdddeeefff\");",
            format("someFunction1234567890(\"aaabb cccdddeeefff\");",
                   getLLVMStyleWithColumns(25)));
  EXPECT_EQ("#define A          \\\n"
            "  string s =       \\\n"
            "      \"123456789\"  \\\n"
            "      \"0\";         \\\n"
            "  int i;",
            format("#define A string s = \"1234567890\"; int i;",
                   getLLVMStyleWithColumns(20)));
  // FIXME: Put additional penalties on breaking at non-whitespace locations.
  EXPECT_EQ("someFunction(\"aaabbbcc \"\n"
            "             \"dddeeeff\"\n"
            "             \"f\");",
            format("someFunction(\"aaabbbcc dddeeefff\");",
                   getLLVMStyleWithColumns(25)));
}

TEST_F(FormatTest, DoNotBreakStringLiteralsInEscapeSequence) {
  EXPECT_EQ("\"\\a\"", format("\"\\a\"", getLLVMStyleWithColumns(3)));
  EXPECT_EQ("\"\\\"", format("\"\\\"", getLLVMStyleWithColumns(2)));
  EXPECT_EQ("\"test\"\n"
            "\"\\n\"",
            format("\"test\\n\"", getLLVMStyleWithColumns(7)));
  EXPECT_EQ("\"tes\\\\\"\n"
            "\"n\"",
            format("\"tes\\\\n\"", getLLVMStyleWithColumns(7)));
  EXPECT_EQ("\"\\\\\\\\\"\n"
            "\"\\n\"",
            format("\"\\\\\\\\\\n\"", getLLVMStyleWithColumns(7)));
  EXPECT_EQ("\"\\uff01\"", format("\"\\uff01\"", getLLVMStyleWithColumns(7)));
  EXPECT_EQ("\"\\uff01\"\n"
            "\"test\"",
            format("\"\\uff01test\"", getLLVMStyleWithColumns(8)));
  EXPECT_EQ("\"\\Uff01ff02\"",
            format("\"\\Uff01ff02\"", getLLVMStyleWithColumns(11)));
  EXPECT_EQ("\"\\x000000000001\"\n"
            "\"next\"",
            format("\"\\x000000000001next\"", getLLVMStyleWithColumns(16)));
  EXPECT_EQ("\"\\x000000000001next\"",
            format("\"\\x000000000001next\"", getLLVMStyleWithColumns(15)));
  EXPECT_EQ("\"\\x000000000001\"",
            format("\"\\x000000000001\"", getLLVMStyleWithColumns(7)));
  EXPECT_EQ("\"test\"\n"
            "\"\\000000\"\n"
            "\"000001\"",
            format("\"test\\000000000001\"", getLLVMStyleWithColumns(9)));
  EXPECT_EQ("\"test\\000\"\n"
            "\"00000000\"\n"
            "\"1\"",
            format("\"test\\000000000001\"", getLLVMStyleWithColumns(10)));
}

TEST_F(FormatTest, DoNotCreateUnreasonableUnwrappedLines) {
  verifyFormat("void f() {\n"
               "  return g() {}\n"
               "  void h() {}");
  verifyFormat("int a[] = {void forgot_closing_brace(){f();\n"
               "g();\n"
               "}");
}

TEST_F(FormatTest, DoNotPrematurelyEndUnwrappedLineForReturnStatements) {
  verifyFormat(
      "void f() { return C{param1, param2}.SomeCall(param1, param2); }");
}

TEST_F(FormatTest, FormatsClosingBracesInEmptyNestedBlocks) {
  verifyFormat("class X {\n"
               "  void f() {\n"
               "  }\n"
               "};",
               getLLVMStyleWithColumns(12));
}

TEST_F(FormatTest, ConfigurableIndentWidth) {
  FormatStyle EightIndent = getLLVMStyleWithColumns(18);
  EightIndent.IndentWidth = 8;
  EightIndent.ContinuationIndentWidth = 8;
  verifyFormat("void f() {\n"
               "        someFunction();\n"
               "        if (true) {\n"
               "                f();\n"
               "        }\n"
               "}",
               EightIndent);
  verifyFormat("class X {\n"
               "        void f() {\n"
               "        }\n"
               "};",
               EightIndent);
  verifyFormat("int x[] = {\n"
               "        call(),\n"
               "        call()};",
               EightIndent);
}

TEST_F(FormatTest, ConfigurableFunctionDeclarationIndentAfterType) {
  verifyFormat("double\n"
               "f();",
               getLLVMStyleWithColumns(8));
}

TEST_F(FormatTest, ConfigurableUseOfTab) {
  FormatStyle Tab = getLLVMStyleWithColumns(42);
  Tab.IndentWidth = 8;
  Tab.UseTab = FormatStyle::UT_Always;
  Tab.AlignEscapedNewlinesLeft = true;

  EXPECT_EQ("if (aaaaaaaa && // q\n"
            "    bb)\t\t// w\n"
            "\t;",
            format("if (aaaaaaaa &&// q\n"
                   "bb)// w\n"
                   ";",
                   Tab));
  EXPECT_EQ("if (aaa && bbb) // w\n"
            "\t;",
            format("if(aaa&&bbb)// w\n"
                   ";",
                   Tab));

  verifyFormat("class X {\n"
               "\tvoid f() {\n"
               "\t\tsomeFunction(parameter1,\n"
               "\t\t\t     parameter2);\n"
               "\t}\n"
               "};",
               Tab);
  verifyFormat("#define A                        \\\n"
               "\tvoid f() {               \\\n"
               "\t\tsomeFunction(    \\\n"
               "\t\t    parameter1,  \\\n"
               "\t\t    parameter2); \\\n"
               "\t}",
               Tab);

  Tab.TabWidth = 4;
  Tab.IndentWidth = 8;
  verifyFormat("class TabWidth4Indent8 {\n"
               "\t\tvoid f() {\n"
               "\t\t\t\tsomeFunction(parameter1,\n"
               "\t\t\t\t\t\t\t parameter2);\n"
               "\t\t}\n"
               "};",
               Tab);

  Tab.TabWidth = 4;
  Tab.IndentWidth = 4;
  verifyFormat("class TabWidth4Indent4 {\n"
               "\tvoid f() {\n"
               "\t\tsomeFunction(parameter1,\n"
               "\t\t\t\t\t parameter2);\n"
               "\t}\n"
               "};",
               Tab);

  Tab.TabWidth = 8;
  Tab.IndentWidth = 4;
  verifyFormat("class TabWidth8Indent4 {\n"
               "    void f() {\n"
               "\tsomeFunction(parameter1,\n"
               "\t\t     parameter2);\n"
               "    }\n"
               "};",
               Tab);

  Tab.TabWidth = 8;
  Tab.IndentWidth = 8;
  EXPECT_EQ("/*\n"
            "\t      a\t\tcomment\n"
            "\t      in multiple lines\n"
            "       */",
            format("   /*\t \t \n"
                   " \t \t a\t\tcomment\t \t\n"
                   " \t \t in multiple lines\t\n"
                   " \t  */",
                   Tab));

  Tab.UseTab = FormatStyle::UT_ForIndentation;
  verifyFormat("{\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "};",
               Tab);
  verifyFormat("enum AA {\n"
               "\ta1, // Force multiple lines\n"
               "\ta2,\n"
               "\ta3\n"
               "};",
               Tab);
  EXPECT_EQ("if (aaaaaaaa && // q\n"
            "    bb)         // w\n"
            "\t;",
            format("if (aaaaaaaa &&// q\n"
                   "bb)// w\n"
                   ";",
                   Tab));
  verifyFormat("class X {\n"
               "\tvoid f() {\n"
               "\t\tsomeFunction(parameter1,\n"
               "\t\t             parameter2);\n"
               "\t}\n"
               "};",
               Tab);
  verifyFormat("{\n"
               "\tQ(\n"
               "\t    {\n"
               "\t\t    int a;\n"
               "\t\t    someFunction(aaaaaaaa,\n"
               "\t\t                 bbbbbbb);\n"
               "\t    },\n"
               "\t    p);\n"
               "}",
               Tab);
  EXPECT_EQ("{\n"
            "\t/* aaaa\n"
            "\t   bbbb */\n"
            "}",
            format("{\n"
                   "/* aaaa\n"
                   "   bbbb */\n"
                   "}",
                   Tab));
  EXPECT_EQ("{\n"
            "\t/*\n"
            "\t  aaaaaaaaaaaaaaaaaaaaaaaaaa\n"
            "\t  bbbbbbbbbbbbb\n"
            "\t*/\n"
            "}",
            format("{\n"
                   "/*\n"
                   "  aaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbb\n"
                   "*/\n"
                   "}",
                   Tab));
  EXPECT_EQ("{\n"
            "\t// aaaaaaaaaaaaaaaaaaaaaaaaaa\n"
            "\t// bbbbbbbbbbbbb\n"
            "}",
            format("{\n"
                   "\t// aaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbb\n"
                   "}",
                   Tab));
  EXPECT_EQ("{\n"
            "\t/*\n"
            "\t  aaaaaaaaaaaaaaaaaaaaaaaaaa\n"
            "\t  bbbbbbbbbbbbb\n"
            "\t*/\n"
            "}",
            format("{\n"
                   "\t/*\n"
                   "\t  aaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbb\n"
                   "\t*/\n"
                   "}",
                   Tab));
  EXPECT_EQ("{\n"
            "\t/*\n"
            "\n"
            "\t*/\n"
            "}",
            format("{\n"
                   "\t/*\n"
                   "\n"
                   "\t*/\n"
                   "}",
                   Tab));
  EXPECT_EQ("{\n"
            "\t/*\n"
            " asdf\n"
            "\t*/\n"
            "}",
            format("{\n"
                   "\t/*\n"
                   " asdf\n"
                   "\t*/\n"
                   "}",
                   Tab));

  Tab.UseTab = FormatStyle::UT_Never;
  EXPECT_EQ("/*\n"
            "              a\t\tcomment\n"
            "              in multiple lines\n"
            "       */",
            format("   /*\t \t \n"
                   " \t \t a\t\tcomment\t \t\n"
                   " \t \t in multiple lines\t\n"
                   " \t  */",
                   Tab));
  EXPECT_EQ("/* some\n"
            "   comment */",
            format(" \t \t /* some\n"
                   " \t \t    comment */",
                   Tab));
  EXPECT_EQ("int a; /* some\n"
            "   comment */",
            format(" \t \t int a; /* some\n"
                   " \t \t    comment */",
                   Tab));

  EXPECT_EQ("int a; /* some\n"
            "comment */",
            format(" \t \t int\ta; /* some\n"
                   " \t \t    comment */",
                   Tab));
  EXPECT_EQ("f(\"\t\t\"); /* some\n"
            "    comment */",
            format(" \t \t f(\"\t\t\"); /* some\n"
                   " \t \t    comment */",
                   Tab));
  EXPECT_EQ("{\n"
            "  /*\n"
            "   * Comment\n"
            "   */\n"
            "  int i;\n"
            "}",
            format("{\n"
                   "\t/*\n"
                   "\t * Comment\n"
                   "\t */\n"
                   "\t int i;\n"
                   "}"));

  Tab.UseTab = FormatStyle::UT_ForContinuationAndIndentation;
  Tab.TabWidth = 8;
  Tab.IndentWidth = 8;
  EXPECT_EQ("if (aaaaaaaa && // q\n"
            "    bb)         // w\n"
            "\t;",
            format("if (aaaaaaaa &&// q\n"
                   "bb)// w\n"
                   ";",
                   Tab));
  EXPECT_EQ("if (aaa && bbb) // w\n"
            "\t;",
            format("if(aaa&&bbb)// w\n"
                   ";",
                   Tab));
  verifyFormat("class X {\n"
               "\tvoid f() {\n"
               "\t\tsomeFunction(parameter1,\n"
               "\t\t\t     parameter2);\n"
               "\t}\n"
               "};",
               Tab);
  verifyFormat("#define A                        \\\n"
               "\tvoid f() {               \\\n"
               "\t\tsomeFunction(    \\\n"
               "\t\t    parameter1,  \\\n"
               "\t\t    parameter2); \\\n"
               "\t}",
               Tab);
  Tab.TabWidth = 4;
  Tab.IndentWidth = 8;
  verifyFormat("class TabWidth4Indent8 {\n"
               "\t\tvoid f() {\n"
               "\t\t\t\tsomeFunction(parameter1,\n"
               "\t\t\t\t\t\t\t parameter2);\n"
               "\t\t}\n"
               "};",
               Tab);
  Tab.TabWidth = 4;
  Tab.IndentWidth = 4;
  verifyFormat("class TabWidth4Indent4 {\n"
               "\tvoid f() {\n"
               "\t\tsomeFunction(parameter1,\n"
               "\t\t\t\t\t parameter2);\n"
               "\t}\n"
               "};",
               Tab);
  Tab.TabWidth = 8;
  Tab.IndentWidth = 4;
  verifyFormat("class TabWidth8Indent4 {\n"
               "    void f() {\n"
               "\tsomeFunction(parameter1,\n"
               "\t\t     parameter2);\n"
               "    }\n"
               "};",
               Tab);
  Tab.TabWidth = 8;
  Tab.IndentWidth = 8;
  EXPECT_EQ("/*\n"
            "\t      a\t\tcomment\n"
            "\t      in multiple lines\n"
            "       */",
            format("   /*\t \t \n"
                   " \t \t a\t\tcomment\t \t\n"
                   " \t \t in multiple lines\t\n"
                   " \t  */",
                   Tab));
  verifyFormat("{\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "\taaaaaaaaaaaaaaaaaaaaaaaaaaaa();\n"
               "};",
               Tab);
  verifyFormat("enum AA {\n"
               "\ta1, // Force multiple lines\n"
               "\ta2,\n"
               "\ta3\n"
               "};",
               Tab);
  EXPECT_EQ("if (aaaaaaaa && // q\n"
            "    bb)         // w\n"
            "\t;",
            format("if (aaaaaaaa &&// q\n"
                   "bb)// w\n"
                   ";",
                   Tab));
  verifyFormat("class X {\n"
               "\tvoid f() {\n"
               "\t\tsomeFunction(parameter1,\n"
               "\t\t\t     parameter2);\n"
               "\t}\n"
               "};",
               Tab);
  verifyFormat("{\n"
               "\tQ(\n"
               "\t    {\n"
               "\t\t    int a;\n"
               "\t\t    someFunction(aaaaaaaa,\n"
               "\t\t\t\t bbbbbbb);\n"
               "\t    },\n"
               "\t    p);\n"
               "}",
               Tab);
  EXPECT_EQ("{\n"
            "\t/* aaaa\n"
            "\t   bbbb */\n"
            "}",
            format("{\n"
                   "/* aaaa\n"
                   "   bbbb */\n"
                   "}",
                   Tab));
  EXPECT_EQ("{\n"
            "\t/*\n"
            "\t  aaaaaaaaaaaaaaaaaaaaaaaaaa\n"
            "\t  bbbbbbbbbbbbb\n"
            "\t*/\n"
            "}",
            format("{\n"
                   "/*\n"
                   "  aaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbb\n"
                   "*/\n"
                   "}",
                   Tab));
  EXPECT_EQ("{\n"
            "\t// aaaaaaaaaaaaaaaaaaaaaaaaaa\n"
            "\t// bbbbbbbbbbbbb\n"
            "}",
            format("{\n"
                   "\t// aaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbb\n"
                   "}",
                   Tab));
  EXPECT_EQ("{\n"
            "\t/*\n"
            "\t  aaaaaaaaaaaaaaaaaaaaaaaaaa\n"
            "\t  bbbbbbbbbbbbb\n"
            "\t*/\n"
            "}",
            format("{\n"
                   "\t/*\n"
                   "\t  aaaaaaaaaaaaaaaaaaaaaaaaaa bbbbbbbbbbbbb\n"
                   "\t*/\n"
                   "}",
                   Tab));
  EXPECT_EQ("{\n"
            "\t/*\n"
            "\n"
            "\t*/\n"
            "}",
            format("{\n"
                   "\t/*\n"
                   "\n"
                   "\t*/\n"
                   "}",
                   Tab));
  EXPECT_EQ("{\n"
            "\t/*\n"
            " asdf\n"
            "\t*/\n"
            "}",
            format("{\n"
                   "\t/*\n"
                   " asdf\n"
                   "\t*/\n"
                   "}",
                   Tab));
  EXPECT_EQ("/*\n"
            "\t      a\t\tcomment\n"
            "\t      in multiple lines\n"
            "       */",
            format("   /*\t \t \n"
                   " \t \t a\t\tcomment\t \t\n"
                   " \t \t in multiple lines\t\n"
                   " \t  */",
                   Tab));
  EXPECT_EQ("/* some\n"
            "   comment */",
            format(" \t \t /* some\n"
                   " \t \t    comment */",
                   Tab));
  EXPECT_EQ("int a; /* some\n"
            "   comment */",
            format(" \t \t int a; /* some\n"
                   " \t \t    comment */",
                   Tab));
  EXPECT_EQ("int a; /* some\n"
            "comment */",
            format(" \t \t int\ta; /* some\n"
                   " \t \t    comment */",
                   Tab));
  EXPECT_EQ("f(\"\t\t\"); /* some\n"
            "    comment */",
            format(" \t \t f(\"\t\t\"); /* some\n"
                   " \t \t    comment */",
                   Tab));
  EXPECT_EQ("{\n"
            "  /*\n"
            "   * Comment\n"
            "   */\n"
            "  int i;\n"
            "}",
            format("{\n"
                   "\t/*\n"
                   "\t * Comment\n"
                   "\t */\n"
                   "\t int i;\n"
                   "}"));
  Tab.AlignConsecutiveAssignments = true;
  Tab.AlignConsecutiveDeclarations = true;
  Tab.TabWidth = 4;
  Tab.IndentWidth = 4;
  verifyFormat("class Assign {\n"
               "\tvoid f() {\n"
               "\t\tint         x      = 123;\n"
               "\t\tint         random = 4;\n"
               "\t\tstd::string alphabet =\n"
               "\t\t\t\"abcdefghijklmnopqrstuvwxyz\";\n"
               "\t}\n"
               "};",
               Tab);
}

TEST_F(FormatTest, CalculatesOriginalColumn) {
  EXPECT_EQ("\"qqqqqqqqqqqqqqqqqqqqqqqqqq\\\n"
            "q\"; /* some\n"
            "       comment */",
            format("  \"qqqqqqqqqqqqqqqqqqqqqqqqqq\\\n"
                   "q\"; /* some\n"
                   "       comment */",
                   getLLVMStyle()));
  EXPECT_EQ("// qqqqqqqqqqqqqqqqqqqqqqqqqq\n"
            "/* some\n"
            "   comment */",
            format("// qqqqqqqqqqqqqqqqqqqqqqqqqq\n"
                   " /* some\n"
                   "    comment */",
                   getLLVMStyle()));
  EXPECT_EQ("// qqqqqqqqqqqqqqqqqqqqqqqqqq\\\n"
            "qqq\n"
            "/* some\n"
            "   comment */",
            format("// qqqqqqqqqqqqqqqqqqqqqqqqqq\\\n"
                   "qqq\n"
                   " /* some\n"
                   "    comment */",
                   getLLVMStyle()));
  EXPECT_EQ("inttt qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq\\\n"
            "wwww; /* some\n"
            "         comment */",
            format("  inttt qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq\\\n"
                   "wwww; /* some\n"
                   "         comment */",
                   getLLVMStyle()));
}

TEST_F(FormatTest, ConfigurableSpaceBeforeParens) {
  FormatStyle NoSpace = getLLVMStyle();
  NoSpace.SpaceBeforeParens = FormatStyle::SBPO_Never;

  verifyFormat("while(true)\n"
               "  continue;",
               NoSpace);
  verifyFormat("for(;;)\n"
               "  continue;",
               NoSpace);
  verifyFormat("if(true)\n"
               "  f();\n"
               "else if(true)\n"
               "  f();",
               NoSpace);
  verifyFormat("do {\n"
               "  do_something();\n"
               "} while(something());",
               NoSpace);
  verifyFormat("switch(x) {\n"
               "default:\n"
               "  break;\n"
               "}",
               NoSpace);
  verifyFormat("auto i = std::make_unique<int>(5);", NoSpace);
  verifyFormat("size_t x = sizeof(x);", NoSpace);
  verifyFormat("auto f(int x) -> decltype(x);", NoSpace);
  verifyFormat("int f(T x) noexcept(x.create());", NoSpace);
  verifyFormat("alignas(128) char a[128];", NoSpace);
  verifyFormat("size_t x = alignof(MyType);", NoSpace);
  verifyFormat("static_assert(sizeof(char) == 1, \"Impossible!\");", NoSpace);
  verifyFormat("int f() throw(Deprecated);", NoSpace);
  verifyFormat("typedef void (*cb)(int);", NoSpace);
  verifyFormat("T A::operator()();", NoSpace);
  verifyFormat("X A::operator++(T);", NoSpace);

  FormatStyle Space = getLLVMStyle();
  Space.SpaceBeforeParens = FormatStyle::SBPO_Always;

  verifyFormat("int f ();", Space);
  verifyFormat("void f (int a, T b) {\n"
               "  while (true)\n"
               "    continue;\n"
               "}",
               Space);
  verifyFormat("if (true)\n"
               "  f ();\n"
               "else if (true)\n"
               "  f ();",
               Space);
  verifyFormat("do {\n"
               "  do_something ();\n"
               "} while (something ());",
               Space);
  verifyFormat("switch (x) {\n"
               "default:\n"
               "  break;\n"
               "}",
               Space);
  verifyFormat("A::A () : a (1) {}", Space);
  verifyFormat("void f () __attribute__ ((asdf));", Space);
  verifyFormat("*(&a + 1);\n"
               "&((&a)[1]);\n"
               "a[(b + c) * d];\n"
               "(((a + 1) * 2) + 3) * 4;",
               Space);
  verifyFormat("#define A(x) x", Space);
  verifyFormat("#define A (x) x", Space);
  verifyFormat("#if defined(x)\n"
               "#endif",
               Space);
  verifyFormat("auto i = std::make_unique<int> (5);", Space);
  verifyFormat("size_t x = sizeof (x);", Space);
  verifyFormat("auto f (int x) -> decltype (x);", Space);
  verifyFormat("int f (T x) noexcept (x.create ());", Space);
  verifyFormat("alignas (128) char a[128];", Space);
  verifyFormat("size_t x = alignof (MyType);", Space);
  verifyFormat("static_assert (sizeof (char) == 1, \"Impossible!\");", Space);
  verifyFormat("int f () throw (Deprecated);", Space);
  verifyFormat("typedef void (*cb) (int);", Space);
  verifyFormat("T A::operator() ();", Space);
  verifyFormat("X A::operator++ (T);", Space);
}

TEST_F(FormatTest, ConfigurableSpacesInParentheses) {
  FormatStyle Spaces = getLLVMStyle();

  Spaces.SpacesInParentheses = true;
  verifyFormat("call( x, y, z );", Spaces);
  verifyFormat("call();", Spaces);
  verifyFormat("std::function<void( int, int )> callback;", Spaces);
  verifyFormat("void inFunction() { std::function<void( int, int )> fct; }",
               Spaces);
  verifyFormat("while ( (bool)1 )\n"
               "  continue;",
               Spaces);
  verifyFormat("for ( ;; )\n"
               "  continue;",
               Spaces);
  verifyFormat("if ( true )\n"
               "  f();\n"
               "else if ( true )\n"
               "  f();",
               Spaces);
  verifyFormat("do {\n"
               "  do_something( (int)i );\n"
               "} while ( something() );",
               Spaces);
  verifyFormat("switch ( x ) {\n"
               "default:\n"
               "  break;\n"
               "}",
               Spaces);

  Spaces.SpacesInParentheses = false;
  Spaces.SpacesInCStyleCastParentheses = true;
  verifyFormat("Type *A = ( Type * )P;", Spaces);
  verifyFormat("Type *A = ( vector<Type *, int *> )P;", Spaces);
  verifyFormat("x = ( int32 )y;", Spaces);
  verifyFormat("int a = ( int )(2.0f);", Spaces);
  verifyFormat("#define AA(X) sizeof((( X * )NULL)->a)", Spaces);
  verifyFormat("my_int a = ( my_int )sizeof(int);", Spaces);
  verifyFormat("#define x (( int )-1)", Spaces);

  // Run the first set of tests again with:
  Spaces.SpacesInParentheses = false;
  Spaces.SpaceInEmptyParentheses = true;
  Spaces.SpacesInCStyleCastParentheses = true;
  verifyFormat("call(x, y, z);", Spaces);
  verifyFormat("call( );", Spaces);
  verifyFormat("std::function<void(int, int)> callback;", Spaces);
  verifyFormat("while (( bool )1)\n"
               "  continue;",
               Spaces);
  verifyFormat("for (;;)\n"
               "  continue;",
               Spaces);
  verifyFormat("if (true)\n"
               "  f( );\n"
               "else if (true)\n"
               "  f( );",
               Spaces);
  verifyFormat("do {\n"
               "  do_something(( int )i);\n"
               "} while (something( ));",
               Spaces);
  verifyFormat("switch (x) {\n"
               "default:\n"
               "  break;\n"
               "}",
               Spaces);

  // Run the first set of tests again with:
  Spaces.SpaceAfterCStyleCast = true;
  verifyFormat("call(x, y, z);", Spaces);
  verifyFormat("call( );", Spaces);
  verifyFormat("std::function<void(int, int)> callback;", Spaces);
  verifyFormat("while (( bool ) 1)\n"
               "  continue;",
               Spaces);
  verifyFormat("for (;;)\n"
               "  continue;",
               Spaces);
  verifyFormat("if (true)\n"
               "  f( );\n"
               "else if (true)\n"
               "  f( );",
               Spaces);
  verifyFormat("do {\n"
               "  do_something(( int ) i);\n"
               "} while (something( ));",
               Spaces);
  verifyFormat("switch (x) {\n"
               "default:\n"
               "  break;\n"
               "}",
               Spaces);

  // Run subset of tests again with:
  Spaces.SpacesInCStyleCastParentheses = false;
  Spaces.SpaceAfterCStyleCast = true;
  verifyFormat("while ((bool) 1)\n"
               "  continue;",
               Spaces);
  verifyFormat("do {\n"
               "  do_something((int) i);\n"
               "} while (something( ));",
               Spaces);
}

TEST_F(FormatTest, ConfigurableSpacesInSquareBrackets) {
  verifyFormat("int a[5];");
  verifyFormat("a[3] += 42;");

  FormatStyle Spaces = getLLVMStyle();
  Spaces.SpacesInSquareBrackets = true;
  // Lambdas unchanged.
  verifyFormat("int c = []() -> int { return 2; }();\n", Spaces);
  verifyFormat("return [i, args...] {};", Spaces);

  // Not lambdas.
  verifyFormat("int a[ 5 ];", Spaces);
  verifyFormat("a[ 3 ] += 42;", Spaces);
  verifyFormat("constexpr char hello[]{\"hello\"};", Spaces);
  verifyFormat("double &operator[](int i) { return 0; }\n"
               "int i;",
               Spaces);
  verifyFormat("std::unique_ptr<int[]> foo() {}", Spaces);
  verifyFormat("int i = a[ a ][ a ]->f();", Spaces);
  verifyFormat("int i = (*b)[ a ]->f();", Spaces);
}

TEST_F(FormatTest, ConfigurableSpaceBeforeAssignmentOperators) {
  verifyFormat("int a = 5;");
  verifyFormat("a += 42;");
  verifyFormat("a or_eq 8;");

  FormatStyle Spaces = getLLVMStyle();
  Spaces.SpaceBeforeAssignmentOperators = false;
  verifyFormat("int a= 5;", Spaces);
  verifyFormat("a+= 42;", Spaces);
  verifyFormat("a or_eq 8;", Spaces);
}

TEST_F(FormatTest, AlignConsecutiveAssignments) {
  FormatStyle Alignment = getLLVMStyle();
  Alignment.AlignConsecutiveAssignments = false;
  verifyFormat("int a = 5;\n"
               "int oneTwoThree = 123;",
               Alignment);
  verifyFormat("int a = 5;\n"
               "int oneTwoThree = 123;",
               Alignment);

  Alignment.AlignConsecutiveAssignments = true;
  verifyFormat("int a           = 5;\n"
               "int oneTwoThree = 123;",
               Alignment);
  verifyFormat("int a           = method();\n"
               "int oneTwoThree = 133;",
               Alignment);
  verifyFormat("a &= 5;\n"
               "bcd *= 5;\n"
               "ghtyf += 5;\n"
               "dvfvdb -= 5;\n"
               "a /= 5;\n"
               "vdsvsv %= 5;\n"
               "sfdbddfbdfbb ^= 5;\n"
               "dvsdsv |= 5;\n"
               "int dsvvdvsdvvv = 123;",
               Alignment);
  verifyFormat("int i = 1, j = 10;\n"
               "something = 2000;",
               Alignment);
  verifyFormat("something = 2000;\n"
               "int i = 1, j = 10;\n",
               Alignment);
  verifyFormat("something = 2000;\n"
               "another   = 911;\n"
               "int i = 1, j = 10;\n"
               "oneMore = 1;\n"
               "i       = 2;",
               Alignment);
  verifyFormat("int a   = 5;\n"
               "int one = 1;\n"
               "method();\n"
               "int oneTwoThree = 123;\n"
               "int oneTwo      = 12;",
               Alignment);
  verifyFormat("int oneTwoThree = 123;\n"
               "int oneTwo      = 12;\n"
               "method();\n",
               Alignment);
  verifyFormat("int oneTwoThree = 123; // comment\n"
               "int oneTwo      = 12;  // comment",
               Alignment);
  EXPECT_EQ("int a = 5;\n"
            "\n"
            "int oneTwoThree = 123;",
            format("int a       = 5;\n"
                   "\n"
                   "int oneTwoThree= 123;",
                   Alignment));
  EXPECT_EQ("int a   = 5;\n"
            "int one = 1;\n"
            "\n"
            "int oneTwoThree = 123;",
            format("int a = 5;\n"
                   "int one = 1;\n"
                   "\n"
                   "int oneTwoThree = 123;",
                   Alignment));
  EXPECT_EQ("int a   = 5;\n"
            "int one = 1;\n"
            "\n"
            "int oneTwoThree = 123;\n"
            "int oneTwo      = 12;",
            format("int a = 5;\n"
                   "int one = 1;\n"
                   "\n"
                   "int oneTwoThree = 123;\n"
                   "int oneTwo = 12;",
                   Alignment));
  Alignment.AlignEscapedNewlinesLeft = true;
  verifyFormat("#define A               \\\n"
               "  int aaaa       = 12;  \\\n"
               "  int b          = 23;  \\\n"
               "  int ccc        = 234; \\\n"
               "  int dddddddddd = 2345;",
               Alignment);
  Alignment.AlignEscapedNewlinesLeft = false;
  verifyFormat("#define A                                                      "
               "                \\\n"
               "  int aaaa       = 12;                                         "
               "                \\\n"
               "  int b          = 23;                                         "
               "                \\\n"
               "  int ccc        = 234;                                        "
               "                \\\n"
               "  int dddddddddd = 2345;",
               Alignment);
  verifyFormat("void SomeFunction(int parameter = 1, int i = 2, int j = 3, int "
               "k = 4, int l = 5,\n"
               "                  int m = 6) {\n"
               "  int j      = 10;\n"
               "  otherThing = 1;\n"
               "}",
               Alignment);
  verifyFormat("void SomeFunction(int parameter = 0) {\n"
               "  int i   = 1;\n"
               "  int j   = 2;\n"
               "  int big = 10000;\n"
               "}",
               Alignment);
  verifyFormat("class C {\n"
               "public:\n"
               "  int i            = 1;\n"
               "  virtual void f() = 0;\n"
               "};",
               Alignment);
  verifyFormat("int i = 1;\n"
               "if (SomeType t = getSomething()) {\n"
               "}\n"
               "int j   = 2;\n"
               "int big = 10000;",
               Alignment);
  verifyFormat("int j = 7;\n"
               "for (int k = 0; k < N; ++k) {\n"
               "}\n"
               "int j   = 2;\n"
               "int big = 10000;\n"
               "}",
               Alignment);
  Alignment.BreakBeforeBinaryOperators = FormatStyle::BOS_All;
  verifyFormat("int i = 1;\n"
               "LooooooooooongType loooooooooooooooooooooongVariable\n"
               "    = someLooooooooooooooooongFunction();\n"
               "int j = 2;",
               Alignment);
  Alignment.BreakBeforeBinaryOperators = FormatStyle::BOS_None;
  verifyFormat("int i = 1;\n"
               "LooooooooooongType loooooooooooooooooooooongVariable =\n"
               "    someLooooooooooooooooongFunction();\n"
               "int j = 2;",
               Alignment);

  verifyFormat("auto lambda = []() {\n"
               "  auto i = 0;\n"
               "  return 0;\n"
               "};\n"
               "int i  = 0;\n"
               "auto v = type{\n"
               "    i = 1,   //\n"
               "    (i = 2), //\n"
               "    i = 3    //\n"
               "};",
               Alignment);

  // FIXME: Should align all three assignments
  verifyFormat(
      "int i      = 1;\n"
      "SomeType a = SomeFunction(looooooooooooooooooooooongParameterA,\n"
      "                          loooooooooooooooooooooongParameterB);\n"
      "int j = 2;",
      Alignment);

  verifyFormat("template <typename T, typename T_0 = very_long_type_name_0,\n"
               "          typename B   = very_long_type_name_1,\n"
               "          typename T_2 = very_long_type_name_2>\n"
               "auto foo() {}\n",
               Alignment);
  verifyFormat("int a, b = 1;\n"
               "int c  = 2;\n"
               "int dd = 3;\n",
               Alignment);
  verifyFormat("int aa       = ((1 > 2) ? 3 : 4);\n"
               "float b[1][] = {{3.f}};\n",
               Alignment);
}

TEST_F(FormatTest, AlignConsecutiveDeclarations) {
  FormatStyle Alignment = getLLVMStyle();
  Alignment.AlignConsecutiveDeclarations = false;
  verifyFormat("float const a = 5;\n"
               "int oneTwoThree = 123;",
               Alignment);
  verifyFormat("int a = 5;\n"
               "float const oneTwoThree = 123;",
               Alignment);

  Alignment.AlignConsecutiveDeclarations = true;
  verifyFormat("float const a = 5;\n"
               "int         oneTwoThree = 123;",
               Alignment);
  verifyFormat("int         a = method();\n"
               "float const oneTwoThree = 133;",
               Alignment);
  verifyFormat("int i = 1, j = 10;\n"
               "something = 2000;",
               Alignment);
  verifyFormat("something = 2000;\n"
               "int i = 1, j = 10;\n",
               Alignment);
  verifyFormat("float      something = 2000;\n"
               "double     another = 911;\n"
               "int        i = 1, j = 10;\n"
               "const int *oneMore = 1;\n"
               "unsigned   i = 2;",
               Alignment);
  verifyFormat("float a = 5;\n"
               "int   one = 1;\n"
               "method();\n"
               "const double       oneTwoThree = 123;\n"
               "const unsigned int oneTwo = 12;",
               Alignment);
  verifyFormat("int      oneTwoThree{0}; // comment\n"
               "unsigned oneTwo;         // comment",
               Alignment);
  EXPECT_EQ("float const a = 5;\n"
            "\n"
            "int oneTwoThree = 123;",
            format("float const   a = 5;\n"
                   "\n"
                   "int           oneTwoThree= 123;",
                   Alignment));
  EXPECT_EQ("float a = 5;\n"
            "int   one = 1;\n"
            "\n"
            "unsigned oneTwoThree = 123;",
            format("float    a = 5;\n"
                   "int      one = 1;\n"
                   "\n"
                   "unsigned oneTwoThree = 123;",
                   Alignment));
  EXPECT_EQ("float a = 5;\n"
            "int   one = 1;\n"
            "\n"
            "unsigned oneTwoThree = 123;\n"
            "int      oneTwo = 12;",
            format("float    a = 5;\n"
                   "int one = 1;\n"
                   "\n"
                   "unsigned oneTwoThree = 123;\n"
                   "int oneTwo = 12;",
                   Alignment));
  Alignment.AlignConsecutiveAssignments = true;
  verifyFormat("float      something = 2000;\n"
               "double     another   = 911;\n"
               "int        i = 1, j = 10;\n"
               "const int *oneMore = 1;\n"
               "unsigned   i       = 2;",
               Alignment);
  verifyFormat("int      oneTwoThree = {0}; // comment\n"
               "unsigned oneTwo      = 0;   // comment",
               Alignment);
  EXPECT_EQ("void SomeFunction(int parameter = 0) {\n"
            "  int const i   = 1;\n"
            "  int *     j   = 2;\n"
            "  int       big = 10000;\n"
            "\n"
            "  unsigned oneTwoThree = 123;\n"
            "  int      oneTwo      = 12;\n"
            "  method();\n"
            "  float k  = 2;\n"
            "  int   ll = 10000;\n"
            "}",
            format("void SomeFunction(int parameter= 0) {\n"
                   " int const  i= 1;\n"
                   "  int *j=2;\n"
                   " int big  =  10000;\n"
                   "\n"
                   "unsigned oneTwoThree  =123;\n"
                   "int oneTwo = 12;\n"
                   "  method();\n"
                   "float k= 2;\n"
                   "int ll=10000;\n"
                   "}",
                   Alignment));
  Alignment.AlignConsecutiveAssignments = false;
  Alignment.AlignEscapedNewlinesLeft = true;
  verifyFormat("#define A              \\\n"
               "  int       aaaa = 12; \\\n"
               "  float     b = 23;    \\\n"
               "  const int ccc = 234; \\\n"
               "  unsigned  dddddddddd = 2345;",
               Alignment);
  Alignment.AlignEscapedNewlinesLeft = false;
  Alignment.ColumnLimit = 30;
  verifyFormat("#define A                    \\\n"
               "  int       aaaa = 12;       \\\n"
               "  float     b = 23;          \\\n"
               "  const int ccc = 234;       \\\n"
               "  int       dddddddddd = 2345;",
               Alignment);
  Alignment.ColumnLimit = 80;
  verifyFormat("void SomeFunction(int parameter = 1, int i = 2, int j = 3, int "
               "k = 4, int l = 5,\n"
               "                  int m = 6) {\n"
               "  const int j = 10;\n"
               "  otherThing = 1;\n"
               "}",
               Alignment);
  verifyFormat("void SomeFunction(int parameter = 0) {\n"
               "  int const i = 1;\n"
               "  int *     j = 2;\n"
               "  int       big = 10000;\n"
               "}",
               Alignment);
  verifyFormat("class C {\n"
               "public:\n"
               "  int          i = 1;\n"
               "  virtual void f() = 0;\n"
               "};",
               Alignment);
  verifyFormat("float i = 1;\n"
               "if (SomeType t = getSomething()) {\n"
               "}\n"
               "const unsigned j = 2;\n"
               "int            big = 10000;",
               Alignment);
  verifyFormat("float j = 7;\n"
               "for (int k = 0; k < N; ++k) {\n"
               "}\n"
               "unsigned j = 2;\n"
               "int      big = 10000;\n"
               "}",
               Alignment);
  Alignment.BreakBeforeBinaryOperators = FormatStyle::BOS_All;
  verifyFormat("float              i = 1;\n"
               "LooooooooooongType loooooooooooooooooooooongVariable\n"
               "    = someLooooooooooooooooongFunction();\n"
               "int j = 2;",
               Alignment);
  Alignment.BreakBeforeBinaryOperators = FormatStyle::BOS_None;
  verifyFormat("int                i = 1;\n"
               "LooooooooooongType loooooooooooooooooooooongVariable =\n"
               "    someLooooooooooooooooongFunction();\n"
               "int j = 2;",
               Alignment);

  Alignment.AlignConsecutiveAssignments = true;
  verifyFormat("auto lambda = []() {\n"
               "  auto  ii = 0;\n"
               "  float j  = 0;\n"
               "  return 0;\n"
               "};\n"
               "int   i  = 0;\n"
               "float i2 = 0;\n"
               "auto  v  = type{\n"
               "    i = 1,   //\n"
               "    (i = 2), //\n"
               "    i = 3    //\n"
               "};",
               Alignment);
  Alignment.AlignConsecutiveAssignments = false;

  // FIXME: Should align all three declarations
  verifyFormat(
      "int      i = 1;\n"
      "SomeType a = SomeFunction(looooooooooooooooooooooongParameterA,\n"
      "                          loooooooooooooooooooooongParameterB);\n"
      "int j = 2;",
      Alignment);

  // Test interactions with ColumnLimit and AlignConsecutiveAssignments:
  // We expect declarations and assignments to align, as long as it doesn't
  // exceed the column limit, starting a new alignemnt sequence whenever it
  // happens.
  Alignment.AlignConsecutiveAssignments = true;
  Alignment.ColumnLimit = 30;
  verifyFormat("float    ii              = 1;\n"
               "unsigned j               = 2;\n"
               "int someVerylongVariable = 1;\n"
               "AnotherLongType  ll = 123456;\n"
               "VeryVeryLongType k  = 2;\n"
               "int              myvar = 1;",
               Alignment);
  Alignment.ColumnLimit = 80;
  Alignment.AlignConsecutiveAssignments = false;

  verifyFormat(
      "template <typename LongTemplate, typename VeryLongTemplateTypeName,\n"
      "          typename LongType, typename B>\n"
      "auto foo() {}\n",
      Alignment);
  verifyFormat("float a, b = 1;\n"
               "int   c = 2;\n"
               "int   dd = 3;\n",
               Alignment);
  verifyFormat("int   aa = ((1 > 2) ? 3 : 4);\n"
               "float b[1][] = {{3.f}};\n",
               Alignment);
  Alignment.AlignConsecutiveAssignments = true;
  verifyFormat("float a, b = 1;\n"
               "int   c  = 2;\n"
               "int   dd = 3;\n",
               Alignment);
  verifyFormat("int   aa     = ((1 > 2) ? 3 : 4);\n"
               "float b[1][] = {{3.f}};\n",
               Alignment);
  Alignment.AlignConsecutiveAssignments = false;

  Alignment.ColumnLimit = 30;
  Alignment.BinPackParameters = false;
  verifyFormat("void foo(float     a,\n"
               "         float     b,\n"
               "         int       c,\n"
               "         uint32_t *d) {\n"
               "  int *  e = 0;\n"
               "  float  f = 0;\n"
               "  double g = 0;\n"
               "}\n"
               "void bar(ino_t     a,\n"
               "         int       b,\n"
               "         uint32_t *c,\n"
               "         bool      d) {}\n",
               Alignment);
  Alignment.BinPackParameters = true;
  Alignment.ColumnLimit = 80;
}

TEST_F(FormatTest, LinuxBraceBreaking) {
  FormatStyle LinuxBraceStyle = getLLVMStyle();
  LinuxBraceStyle.BreakBeforeBraces = FormatStyle::BS_Linux;
  verifyFormat("namespace a\n"
               "{\n"
               "class A\n"
               "{\n"
               "  void f()\n"
               "  {\n"
               "    if (true) {\n"
               "      a();\n"
               "      b();\n"
               "    } else {\n"
               "      a();\n"
               "    }\n"
               "  }\n"
               "  void g() { return; }\n"
               "};\n"
               "struct B {\n"
               "  int x;\n"
               "};\n"
               "}\n",
               LinuxBraceStyle);
  verifyFormat("enum X {\n"
               "  Y = 0,\n"
               "}\n",
               LinuxBraceStyle);
  verifyFormat("struct S {\n"
               "  int Type;\n"
               "  union {\n"
               "    int x;\n"
               "    double y;\n"
               "  } Value;\n"
               "  class C\n"
               "  {\n"
               "    MyFavoriteType Value;\n"
               "  } Class;\n"
               "}\n",
               LinuxBraceStyle);
}

TEST_F(FormatTest, MozillaBraceBreaking) {
  FormatStyle MozillaBraceStyle = getLLVMStyle();
  MozillaBraceStyle.BreakBeforeBraces = FormatStyle::BS_Mozilla;
  verifyFormat("namespace a {\n"
               "class A\n"
               "{\n"
               "  void f()\n"
               "  {\n"
               "    if (true) {\n"
               "      a();\n"
               "      b();\n"
               "    }\n"
               "  }\n"
               "  void g() { return; }\n"
               "};\n"
               "enum E\n"
               "{\n"
               "  A,\n"
               "  // foo\n"
               "  B,\n"
               "  C\n"
               "};\n"
               "struct B\n"
               "{\n"
               "  int x;\n"
               "};\n"
               "}\n",
               MozillaBraceStyle);
  verifyFormat("struct S\n"
               "{\n"
               "  int Type;\n"
               "  union\n"
               "  {\n"
               "    int x;\n"
               "    double y;\n"
               "  } Value;\n"
               "  class C\n"
               "  {\n"
               "    MyFavoriteType Value;\n"
               "  } Class;\n"
               "}\n",
               MozillaBraceStyle);
}

TEST_F(FormatTest, StroustrupBraceBreaking) {
  FormatStyle StroustrupBraceStyle = getLLVMStyle();
  StroustrupBraceStyle.BreakBeforeBraces = FormatStyle::BS_Stroustrup;
  verifyFormat("namespace a {\n"
               "class A {\n"
               "  void f()\n"
               "  {\n"
               "    if (true) {\n"
               "      a();\n"
               "      b();\n"
               "    }\n"
               "  }\n"
               "  void g() { return; }\n"
               "};\n"
               "struct B {\n"
               "  int x;\n"
               "};\n"
               "}\n",
               StroustrupBraceStyle);

  verifyFormat("void foo()\n"
               "{\n"
               "  if (a) {\n"
               "    a();\n"
               "  }\n"
               "  else {\n"
               "    b();\n"
               "  }\n"
               "}\n",
               StroustrupBraceStyle);

  verifyFormat("#ifdef _DEBUG\n"
               "int foo(int i = 0)\n"
               "#else\n"
               "int foo(int i = 5)\n"
               "#endif\n"
               "{\n"
               "  return i;\n"
               "}",
               StroustrupBraceStyle);

  verifyFormat("void foo() {}\n"
               "void bar()\n"
               "#ifdef _DEBUG\n"
               "{\n"
               "  foo();\n"
               "}\n"
               "#else\n"
               "{\n"
               "}\n"
               "#endif",
               StroustrupBraceStyle);

  verifyFormat("void foobar() { int i = 5; }\n"
               "#ifdef _DEBUG\n"
               "void bar() {}\n"
               "#else\n"
               "void bar() { foobar(); }\n"
               "#endif",
               StroustrupBraceStyle);
}

TEST_F(FormatTest, AllmanBraceBreaking) {
  FormatStyle AllmanBraceStyle = getLLVMStyle();
  AllmanBraceStyle.BreakBeforeBraces = FormatStyle::BS_Allman;
  verifyFormat("namespace a\n"
               "{\n"
               "class A\n"
               "{\n"
               "  void f()\n"
               "  {\n"
               "    if (true)\n"
               "    {\n"
               "      a();\n"
               "      b();\n"
               "    }\n"
               "  }\n"
               "  void g() { return; }\n"
               "};\n"
               "struct B\n"
               "{\n"
               "  int x;\n"
               "};\n"
               "}",
               AllmanBraceStyle);

  verifyFormat("void f()\n"
               "{\n"
               "  if (true)\n"
               "  {\n"
               "    a();\n"
               "  }\n"
               "  else if (false)\n"
               "  {\n"
               "    b();\n"
               "  }\n"
               "  else\n"
               "  {\n"
               "    c();\n"
               "  }\n"
               "}\n",
               AllmanBraceStyle);

  verifyFormat("void f()\n"
               "{\n"
               "  for (int i = 0; i < 10; ++i)\n"
               "  {\n"
               "    a();\n"
               "  }\n"
               "  while (false)\n"
               "  {\n"
               "    b();\n"
               "  }\n"
               "  do\n"
               "  {\n"
               "    c();\n"
               "  } while (false)\n"
               "}\n",
               AllmanBraceStyle);

  verifyFormat("void f(int a)\n"
               "{\n"
               "  switch (a)\n"
               "  {\n"
               "  case 0:\n"
               "    break;\n"
               "  case 1:\n"
               "  {\n"
               "    break;\n"
               "  }\n"
               "  case 2:\n"
               "  {\n"
               "  }\n"
               "  break;\n"
               "  default:\n"
               "    break;\n"
               "  }\n"
               "}\n",
               AllmanBraceStyle);

  verifyFormat("enum X\n"
               "{\n"
               "  Y = 0,\n"
               "}\n",
               AllmanBraceStyle);
  verifyFormat("enum X\n"
               "{\n"
               "  Y = 0\n"
               "}\n",
               AllmanBraceStyle);

  verifyFormat("@interface BSApplicationController ()\n"
               "{\n"
               "@private\n"
               "  id _extraIvar;\n"
               "}\n"
               "@end\n",
               AllmanBraceStyle);

  verifyFormat("#ifdef _DEBUG\n"
               "int foo(int i = 0)\n"
               "#else\n"
               "int foo(int i = 5)\n"
               "#endif\n"
               "{\n"
               "  return i;\n"
               "}",
               AllmanBraceStyle);

  verifyFormat("void foo() {}\n"
               "void bar()\n"
               "#ifdef _DEBUG\n"
               "{\n"
               "  foo();\n"
               "}\n"
               "#else\n"
               "{\n"
               "}\n"
               "#endif",
               AllmanBraceStyle);

  verifyFormat("void foobar() { int i = 5; }\n"
               "#ifdef _DEBUG\n"
               "void bar() {}\n"
               "#else\n"
               "void bar() { foobar(); }\n"
               "#endif",
               AllmanBraceStyle);

  // This shouldn't affect ObjC blocks..
  verifyFormat("[self doSomeThingWithACompletionHandler:^{\n"
               "  // ...\n"
               "  int i;\n"
               "}];",
               AllmanBraceStyle);
  verifyFormat("void (^block)(void) = ^{\n"
               "  // ...\n"
               "  int i;\n"
               "};",
               AllmanBraceStyle);
  // .. or dict literals.
  verifyFormat("void f()\n"
               "{\n"
               "  [object someMethod:@{ @\"a\" : @\"b\" }];\n"
               "}",
               AllmanBraceStyle);
  verifyFormat("int f()\n"
               "{ // comment\n"
               "  return 42;\n"
               "}",
               AllmanBraceStyle);

  AllmanBraceStyle.ColumnLimit = 19;
  verifyFormat("void f() { int i; }", AllmanBraceStyle);
  AllmanBraceStyle.ColumnLimit = 18;
  verifyFormat("void f()\n"
               "{\n"
               "  int i;\n"
               "}",
               AllmanBraceStyle);
  AllmanBraceStyle.ColumnLimit = 80;

  FormatStyle BreakBeforeBraceShortIfs = AllmanBraceStyle;
  BreakBeforeBraceShortIfs.AllowShortIfStatementsOnASingleLine = true;
  BreakBeforeBraceShortIfs.AllowShortLoopsOnASingleLine = true;
  verifyFormat("void f(bool b)\n"
               "{\n"
               "  if (b)\n"
               "  {\n"
               "    return;\n"
               "  }\n"
               "}\n",
               BreakBeforeBraceShortIfs);
  verifyFormat("void f(bool b)\n"
               "{\n"
               "  if (b) return;\n"
               "}\n",
               BreakBeforeBraceShortIfs);
  verifyFormat("void f(bool b)\n"
               "{\n"
               "  while (b)\n"
               "  {\n"
               "    return;\n"
               "  }\n"
               "}\n",
               BreakBeforeBraceShortIfs);
}

TEST_F(FormatTest, GNUBraceBreaking) {
  FormatStyle GNUBraceStyle = getLLVMStyle();
  GNUBraceStyle.BreakBeforeBraces = FormatStyle::BS_GNU;
  verifyFormat("namespace a\n"
               "{\n"
               "class A\n"
               "{\n"
               "  void f()\n"
               "  {\n"
               "    int a;\n"
               "    {\n"
               "      int b;\n"
               "    }\n"
               "    if (true)\n"
               "      {\n"
               "        a();\n"
               "        b();\n"
               "      }\n"
               "  }\n"
               "  void g() { return; }\n"
               "}\n"
               "}",
               GNUBraceStyle);

  verifyFormat("void f()\n"
               "{\n"
               "  if (true)\n"
               "    {\n"
               "      a();\n"
               "    }\n"
               "  else if (false)\n"
               "    {\n"
               "      b();\n"
               "    }\n"
               "  else\n"
               "    {\n"
               "      c();\n"
               "    }\n"
               "}\n",
               GNUBraceStyle);

  verifyFormat("void f()\n"
               "{\n"
               "  for (int i = 0; i < 10; ++i)\n"
               "    {\n"
               "      a();\n"
               "    }\n"
               "  while (false)\n"
               "    {\n"
               "      b();\n"
               "    }\n"
               "  do\n"
               "    {\n"
               "      c();\n"
               "    }\n"
               "  while (false);\n"
               "}\n",
               GNUBraceStyle);

  verifyFormat("void f(int a)\n"
               "{\n"
               "  switch (a)\n"
               "    {\n"
               "    case 0:\n"
               "      break;\n"
               "    case 1:\n"
               "      {\n"
               "        break;\n"
               "      }\n"
               "    case 2:\n"
               "      {\n"
               "      }\n"
               "      break;\n"
               "    default:\n"
               "      break;\n"
               "    }\n"
               "}\n",
               GNUBraceStyle);

  verifyFormat("enum X\n"
               "{\n"
               "  Y = 0,\n"
               "}\n",
               GNUBraceStyle);

  verifyFormat("@interface BSApplicationController ()\n"
               "{\n"
               "@private\n"
               "  id _extraIvar;\n"
               "}\n"
               "@end\n",
               GNUBraceStyle);

  verifyFormat("#ifdef _DEBUG\n"
               "int foo(int i = 0)\n"
               "#else\n"
               "int foo(int i = 5)\n"
               "#endif\n"
               "{\n"
               "  return i;\n"
               "}",
               GNUBraceStyle);

  verifyFormat("void foo() {}\n"
               "void bar()\n"
               "#ifdef _DEBUG\n"
               "{\n"
               "  foo();\n"
               "}\n"
               "#else\n"
               "{\n"
               "}\n"
               "#endif",
               GNUBraceStyle);

  verifyFormat("void foobar() { int i = 5; }\n"
               "#ifdef _DEBUG\n"
               "void bar() {}\n"
               "#else\n"
               "void bar() { foobar(); }\n"
               "#endif",
               GNUBraceStyle);
}

TEST_F(FormatTest, WebKitBraceBreaking) {
  FormatStyle WebKitBraceStyle = getLLVMStyle();
  WebKitBraceStyle.BreakBeforeBraces = FormatStyle::BS_WebKit;
  verifyFormat("namespace a {\n"
               "class A {\n"
               "  void f()\n"
               "  {\n"
               "    if (true) {\n"
               "      a();\n"
               "      b();\n"
               "    }\n"
               "  }\n"
               "  void g() { return; }\n"
               "};\n"
               "enum E {\n"
               "  A,\n"
               "  // foo\n"
               "  B,\n"
               "  C\n"
               "};\n"
               "struct B {\n"
               "  int x;\n"
               "};\n"
               "}\n",
               WebKitBraceStyle);
  verifyFormat("struct S {\n"
               "  int Type;\n"
               "  union {\n"
               "    int x;\n"
               "    double y;\n"
               "  } Value;\n"
               "  class C {\n"
               "    MyFavoriteType Value;\n"
               "  } Class;\n"
               "};\n",
               WebKitBraceStyle);
}

TEST_F(FormatTest, CatchExceptionReferenceBinding) {
  verifyFormat("void f() {\n"
               "  try {\n"
               "  } catch (const Exception &e) {\n"
               "  }\n"
               "}\n",
               getLLVMStyle());
}

TEST_F(FormatTest, UnderstandsPragmas) {
  verifyFormat("#pragma omp reduction(| : var)");
  verifyFormat("#pragma omp reduction(+ : var)");

  EXPECT_EQ("#pragma mark Any non-hyphenated or hyphenated string "
            "(including parentheses).",
            format("#pragma    mark   Any non-hyphenated or hyphenated string "
                   "(including parentheses)."));
}

TEST_F(FormatTest, UnderstandPragmaOption) {
  verifyFormat("#pragma option -C -A");

  EXPECT_EQ("#pragma option -C -A", format("#pragma    option   -C   -A"));
}

#define EXPECT_ALL_STYLES_EQUAL(Styles)                                        \
  for (size_t i = 1; i < Styles.size(); ++i)                                   \
  EXPECT_EQ(Styles[0], Styles[i]) << "Style #" << i << " of " << Styles.size() \
                                  << " differs from Style #0"

TEST_F(FormatTest, GetsPredefinedStyleByName) {
  SmallVector<FormatStyle, 3> Styles;
  Styles.resize(3);

  Styles[0] = getLLVMStyle();
  EXPECT_TRUE(getPredefinedStyle("LLVM", FormatStyle::LK_Cpp, &Styles[1]));
  EXPECT_TRUE(getPredefinedStyle("lLvM", FormatStyle::LK_Cpp, &Styles[2]));
  EXPECT_ALL_STYLES_EQUAL(Styles);

  Styles[0] = getGoogleStyle();
  EXPECT_TRUE(getPredefinedStyle("Google", FormatStyle::LK_Cpp, &Styles[1]));
  EXPECT_TRUE(getPredefinedStyle("gOOgle", FormatStyle::LK_Cpp, &Styles[2]));
  EXPECT_ALL_STYLES_EQUAL(Styles);

  Styles[0] = getGoogleStyle(FormatStyle::LK_JavaScript);
  EXPECT_TRUE(
      getPredefinedStyle("Google", FormatStyle::LK_JavaScript, &Styles[1]));
  EXPECT_TRUE(
      getPredefinedStyle("gOOgle", FormatStyle::LK_JavaScript, &Styles[2]));
  EXPECT_ALL_STYLES_EQUAL(Styles);

  Styles[0] = getChromiumStyle(FormatStyle::LK_Cpp);
  EXPECT_TRUE(getPredefinedStyle("Chromium", FormatStyle::LK_Cpp, &Styles[1]));
  EXPECT_TRUE(getPredefinedStyle("cHRoMiUM", FormatStyle::LK_Cpp, &Styles[2]));
  EXPECT_ALL_STYLES_EQUAL(Styles);

  Styles[0] = getMozillaStyle();
  EXPECT_TRUE(getPredefinedStyle("Mozilla", FormatStyle::LK_Cpp, &Styles[1]));
  EXPECT_TRUE(getPredefinedStyle("moZILla", FormatStyle::LK_Cpp, &Styles[2]));
  EXPECT_ALL_STYLES_EQUAL(Styles);

  Styles[0] = getWebKitStyle();
  EXPECT_TRUE(getPredefinedStyle("WebKit", FormatStyle::LK_Cpp, &Styles[1]));
  EXPECT_TRUE(getPredefinedStyle("wEbKit", FormatStyle::LK_Cpp, &Styles[2]));
  EXPECT_ALL_STYLES_EQUAL(Styles);

  Styles[0] = getGNUStyle();
  EXPECT_TRUE(getPredefinedStyle("GNU", FormatStyle::LK_Cpp, &Styles[1]));
  EXPECT_TRUE(getPredefinedStyle("gnU", FormatStyle::LK_Cpp, &Styles[2]));
  EXPECT_ALL_STYLES_EQUAL(Styles);

  EXPECT_FALSE(getPredefinedStyle("qwerty", FormatStyle::LK_Cpp, &Styles[0]));
}

TEST_F(FormatTest, GetsCorrectBasedOnStyle) {
  SmallVector<FormatStyle, 8> Styles;
  Styles.resize(2);

  Styles[0] = getGoogleStyle();
  Styles[1] = getLLVMStyle();
  EXPECT_EQ(0, parseConfiguration("BasedOnStyle: Google", &Styles[1]).value());
  EXPECT_ALL_STYLES_EQUAL(Styles);

  Styles.resize(5);
  Styles[0] = getGoogleStyle(FormatStyle::LK_JavaScript);
  Styles[1] = getLLVMStyle();
  Styles[1].Language = FormatStyle::LK_JavaScript;
  EXPECT_EQ(0, parseConfiguration("BasedOnStyle: Google", &Styles[1]).value());

  Styles[2] = getLLVMStyle();
  Styles[2].Language = FormatStyle::LK_JavaScript;
  EXPECT_EQ(0, parseConfiguration("Language: JavaScript\n"
                                  "BasedOnStyle: Google",
                                  &Styles[2])
                   .value());

  Styles[3] = getLLVMStyle();
  Styles[3].Language = FormatStyle::LK_JavaScript;
  EXPECT_EQ(0, parseConfiguration("BasedOnStyle: Google\n"
                                  "Language: JavaScript",
                                  &Styles[3])
                   .value());

  Styles[4] = getLLVMStyle();
  Styles[4].Language = FormatStyle::LK_JavaScript;
  EXPECT_EQ(0, parseConfiguration("---\n"
                                  "BasedOnStyle: LLVM\n"
                                  "IndentWidth: 123\n"
                                  "---\n"
                                  "BasedOnStyle: Google\n"
                                  "Language: JavaScript",
                                  &Styles[4])
                   .value());
  EXPECT_ALL_STYLES_EQUAL(Styles);
}

#define CHECK_PARSE_BOOL_FIELD(FIELD, CONFIG_NAME)                             \
  Style.FIELD = false;                                                         \
  EXPECT_EQ(0, parseConfiguration(CONFIG_NAME ": true", &Style).value());      \
  EXPECT_TRUE(Style.FIELD);                                                    \
  EXPECT_EQ(0, parseConfiguration(CONFIG_NAME ": false", &Style).value());     \
  EXPECT_FALSE(Style.FIELD);

#define CHECK_PARSE_BOOL(FIELD) CHECK_PARSE_BOOL_FIELD(FIELD, #FIELD)

#define CHECK_PARSE_NESTED_BOOL_FIELD(STRUCT, FIELD, CONFIG_NAME)              \
  Style.STRUCT.FIELD = false;                                                  \
  EXPECT_EQ(0,                                                                 \
            parseConfiguration(#STRUCT ":\n  " CONFIG_NAME ": true", &Style)   \
                .value());                                                     \
  EXPECT_TRUE(Style.STRUCT.FIELD);                                             \
  EXPECT_EQ(0,                                                                 \
            parseConfiguration(#STRUCT ":\n  " CONFIG_NAME ": false", &Style)  \
                .value());                                                     \
  EXPECT_FALSE(Style.STRUCT.FIELD);

#define CHECK_PARSE_NESTED_BOOL(STRUCT, FIELD)                                 \
  CHECK_PARSE_NESTED_BOOL_FIELD(STRUCT, FIELD, #FIELD)

#define CHECK_PARSE(TEXT, FIELD, VALUE)                                        \
  EXPECT_NE(VALUE, Style.FIELD);                                               \
  EXPECT_EQ(0, parseConfiguration(TEXT, &Style).value());                      \
  EXPECT_EQ(VALUE, Style.FIELD)

TEST_F(FormatTest, ParsesConfigurationBools) {
  FormatStyle Style = {};
  Style.Language = FormatStyle::LK_Cpp;
  CHECK_PARSE_BOOL(AlignEscapedNewlinesLeft);
  CHECK_PARSE_BOOL(AlignOperands);
  CHECK_PARSE_BOOL(AlignTrailingComments);
  CHECK_PARSE_BOOL(AlignConsecutiveAssignments);
  CHECK_PARSE_BOOL(AlignConsecutiveDeclarations);
  CHECK_PARSE_BOOL(AllowAllParametersOfDeclarationOnNextLine);
  CHECK_PARSE_BOOL(AllowShortBlocksOnASingleLine);
  CHECK_PARSE_BOOL(AllowShortCaseLabelsOnASingleLine);
  CHECK_PARSE_BOOL(AllowShortIfStatementsOnASingleLine);
  CHECK_PARSE_BOOL(AllowShortLoopsOnASingleLine);
  CHECK_PARSE_BOOL(AlwaysBreakTemplateDeclarations);
  CHECK_PARSE_BOOL(BinPackArguments);
  CHECK_PARSE_BOOL(BinPackParameters);
  CHECK_PARSE_BOOL(BreakAfterJavaFieldAnnotations);
  CHECK_PARSE_BOOL(BreakBeforeTernaryOperators);
  CHECK_PARSE_BOOL(BreakConstructorInitializersBeforeComma);
  CHECK_PARSE_BOOL(BreakStringLiterals);
  CHECK_PARSE_BOOL(ConstructorInitializerAllOnOneLineOrOnePerLine);
  CHECK_PARSE_BOOL(DerivePointerAlignment);
  CHECK_PARSE_BOOL_FIELD(DerivePointerAlignment, "DerivePointerBinding");
  CHECK_PARSE_BOOL(DisableFormat);
  CHECK_PARSE_BOOL(IndentCaseLabels);
  CHECK_PARSE_BOOL(IndentWrappedFunctionNames);
  CHECK_PARSE_BOOL(KeepEmptyLinesAtTheStartOfBlocks);
  CHECK_PARSE_BOOL(ObjCSpaceAfterProperty);
  CHECK_PARSE_BOOL(ObjCSpaceBeforeProtocolList);
  CHECK_PARSE_BOOL(Cpp11BracedListStyle);
  CHECK_PARSE_BOOL(ReflowComments);
  CHECK_PARSE_BOOL(SortIncludes);
  CHECK_PARSE_BOOL(SpacesInParentheses);
  CHECK_PARSE_BOOL(SpacesInSquareBrackets);
  CHECK_PARSE_BOOL(SpacesInAngles);
  CHECK_PARSE_BOOL(SpaceInEmptyParentheses);
  CHECK_PARSE_BOOL(SpacesInContainerLiterals);
  CHECK_PARSE_BOOL(SpacesInCStyleCastParentheses);
  CHECK_PARSE_BOOL(SpaceAfterCStyleCast);
  CHECK_PARSE_BOOL(SpaceAfterTemplateKeyword);
  CHECK_PARSE_BOOL(SpaceBeforeAssignmentOperators);

  CHECK_PARSE_NESTED_BOOL(BraceWrapping, AfterClass);
  CHECK_PARSE_NESTED_BOOL(BraceWrapping, AfterControlStatement);
  CHECK_PARSE_NESTED_BOOL(BraceWrapping, AfterEnum);
  CHECK_PARSE_NESTED_BOOL(BraceWrapping, AfterFunction);
  CHECK_PARSE_NESTED_BOOL(BraceWrapping, AfterNamespace);
  CHECK_PARSE_NESTED_BOOL(BraceWrapping, AfterObjCDeclaration);
  CHECK_PARSE_NESTED_BOOL(BraceWrapping, AfterStruct);
  CHECK_PARSE_NESTED_BOOL(BraceWrapping, AfterUnion);
  CHECK_PARSE_NESTED_BOOL(BraceWrapping, BeforeCatch);
  CHECK_PARSE_NESTED_BOOL(BraceWrapping, BeforeElse);
  CHECK_PARSE_NESTED_BOOL(BraceWrapping, IndentBraces);
}

#undef CHECK_PARSE_BOOL

TEST_F(FormatTest, ParsesConfiguration) {
  FormatStyle Style = {};
  Style.Language = FormatStyle::LK_Cpp;
  CHECK_PARSE("AccessModifierOffset: -1234", AccessModifierOffset, -1234);
  CHECK_PARSE("ConstructorInitializerIndentWidth: 1234",
              ConstructorInitializerIndentWidth, 1234u);
  CHECK_PARSE("ObjCBlockIndentWidth: 1234", ObjCBlockIndentWidth, 1234u);
  CHECK_PARSE("ColumnLimit: 1234", ColumnLimit, 1234u);
  CHECK_PARSE("MaxEmptyLinesToKeep: 1234", MaxEmptyLinesToKeep, 1234u);
  CHECK_PARSE("PenaltyBreakBeforeFirstCallParameter: 1234",
              PenaltyBreakBeforeFirstCallParameter, 1234u);
  CHECK_PARSE("PenaltyExcessCharacter: 1234", PenaltyExcessCharacter, 1234u);
  CHECK_PARSE("PenaltyReturnTypeOnItsOwnLine: 1234",
              PenaltyReturnTypeOnItsOwnLine, 1234u);
  CHECK_PARSE("SpacesBeforeTrailingComments: 1234",
              SpacesBeforeTrailingComments, 1234u);
  CHECK_PARSE("IndentWidth: 32", IndentWidth, 32u);
  CHECK_PARSE("ContinuationIndentWidth: 11", ContinuationIndentWidth, 11u);
  CHECK_PARSE("CommentPragmas: '// abc$'", CommentPragmas, "// abc$");

  Style.PointerAlignment = FormatStyle::PAS_Middle;
  CHECK_PARSE("PointerAlignment: Left", PointerAlignment,
              FormatStyle::PAS_Left);
  CHECK_PARSE("PointerAlignment: Right", PointerAlignment,
              FormatStyle::PAS_Right);
  CHECK_PARSE("PointerAlignment: Middle", PointerAlignment,
              FormatStyle::PAS_Middle);
  // For backward compatibility:
  CHECK_PARSE("PointerBindsToType: Left", PointerAlignment,
              FormatStyle::PAS_Left);
  CHECK_PARSE("PointerBindsToType: Right", PointerAlignment,
              FormatStyle::PAS_Right);
  CHECK_PARSE("PointerBindsToType: Middle", PointerAlignment,
              FormatStyle::PAS_Middle);

  Style.Standard = FormatStyle::LS_Auto;
  CHECK_PARSE("Standard: Cpp03", Standard, FormatStyle::LS_Cpp03);
  CHECK_PARSE("Standard: Cpp11", Standard, FormatStyle::LS_Cpp11);
  CHECK_PARSE("Standard: C++03", Standard, FormatStyle::LS_Cpp03);
  CHECK_PARSE("Standard: C++11", Standard, FormatStyle::LS_Cpp11);
  CHECK_PARSE("Standard: Auto", Standard, FormatStyle::LS_Auto);

  Style.BreakBeforeBinaryOperators = FormatStyle::BOS_All;
  CHECK_PARSE("BreakBeforeBinaryOperators: NonAssignment",
              BreakBeforeBinaryOperators, FormatStyle::BOS_NonAssignment);
  CHECK_PARSE("BreakBeforeBinaryOperators: None", BreakBeforeBinaryOperators,
              FormatStyle::BOS_None);
  CHECK_PARSE("BreakBeforeBinaryOperators: All", BreakBeforeBinaryOperators,
              FormatStyle::BOS_All);
  // For backward compatibility:
  CHECK_PARSE("BreakBeforeBinaryOperators: false", BreakBeforeBinaryOperators,
              FormatStyle::BOS_None);
  CHECK_PARSE("BreakBeforeBinaryOperators: true", BreakBeforeBinaryOperators,
              FormatStyle::BOS_All);

  Style.AlignAfterOpenBracket = FormatStyle::BAS_AlwaysBreak;
  CHECK_PARSE("AlignAfterOpenBracket: Align", AlignAfterOpenBracket,
              FormatStyle::BAS_Align);
  CHECK_PARSE("AlignAfterOpenBracket: DontAlign", AlignAfterOpenBracket,
              FormatStyle::BAS_DontAlign);
  CHECK_PARSE("AlignAfterOpenBracket: AlwaysBreak", AlignAfterOpenBracket,
              FormatStyle::BAS_AlwaysBreak);
  // For backward compatibility:
  CHECK_PARSE("AlignAfterOpenBracket: false", AlignAfterOpenBracket,
              FormatStyle::BAS_DontAlign);
  CHECK_PARSE("AlignAfterOpenBracket: true", AlignAfterOpenBracket,
              FormatStyle::BAS_Align);

  Style.UseTab = FormatStyle::UT_ForIndentation;
  CHECK_PARSE("UseTab: Never", UseTab, FormatStyle::UT_Never);
  CHECK_PARSE("UseTab: ForIndentation", UseTab, FormatStyle::UT_ForIndentation);
  CHECK_PARSE("UseTab: Always", UseTab, FormatStyle::UT_Always);
  CHECK_PARSE("UseTab: ForContinuationAndIndentation", UseTab,
              FormatStyle::UT_ForContinuationAndIndentation);
  // For backward compatibility:
  CHECK_PARSE("UseTab: false", UseTab, FormatStyle::UT_Never);
  CHECK_PARSE("UseTab: true", UseTab, FormatStyle::UT_Always);

  Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Inline;
  CHECK_PARSE("AllowShortFunctionsOnASingleLine: None",
              AllowShortFunctionsOnASingleLine, FormatStyle::SFS_None);
  CHECK_PARSE("AllowShortFunctionsOnASingleLine: Inline",
              AllowShortFunctionsOnASingleLine, FormatStyle::SFS_Inline);
  CHECK_PARSE("AllowShortFunctionsOnASingleLine: Empty",
              AllowShortFunctionsOnASingleLine, FormatStyle::SFS_Empty);
  CHECK_PARSE("AllowShortFunctionsOnASingleLine: All",
              AllowShortFunctionsOnASingleLine, FormatStyle::SFS_All);
  // For backward compatibility:
  CHECK_PARSE("AllowShortFunctionsOnASingleLine: false",
              AllowShortFunctionsOnASingleLine, FormatStyle::SFS_None);
  CHECK_PARSE("AllowShortFunctionsOnASingleLine: true",
              AllowShortFunctionsOnASingleLine, FormatStyle::SFS_All);

  Style.SpaceBeforeParens = FormatStyle::SBPO_Always;
  CHECK_PARSE("SpaceBeforeParens: Never", SpaceBeforeParens,
              FormatStyle::SBPO_Never);
  CHECK_PARSE("SpaceBeforeParens: Always", SpaceBeforeParens,
              FormatStyle::SBPO_Always);
  CHECK_PARSE("SpaceBeforeParens: ControlStatements", SpaceBeforeParens,
              FormatStyle::SBPO_ControlStatements);
  // For backward compatibility:
  CHECK_PARSE("SpaceAfterControlStatementKeyword: false", SpaceBeforeParens,
              FormatStyle::SBPO_Never);
  CHECK_PARSE("SpaceAfterControlStatementKeyword: true", SpaceBeforeParens,
              FormatStyle::SBPO_ControlStatements);

  Style.ColumnLimit = 123;
  FormatStyle BaseStyle = getLLVMStyle();
  CHECK_PARSE("BasedOnStyle: LLVM", ColumnLimit, BaseStyle.ColumnLimit);
  CHECK_PARSE("BasedOnStyle: LLVM\nColumnLimit: 1234", ColumnLimit, 1234u);

  Style.BreakBeforeBraces = FormatStyle::BS_Stroustrup;
  CHECK_PARSE("BreakBeforeBraces: Attach", BreakBeforeBraces,
              FormatStyle::BS_Attach);
  CHECK_PARSE("BreakBeforeBraces: Linux", BreakBeforeBraces,
              FormatStyle::BS_Linux);
  CHECK_PARSE("BreakBeforeBraces: Mozilla", BreakBeforeBraces,
              FormatStyle::BS_Mozilla);
  CHECK_PARSE("BreakBeforeBraces: Stroustrup", BreakBeforeBraces,
              FormatStyle::BS_Stroustrup);
  CHECK_PARSE("BreakBeforeBraces: Allman", BreakBeforeBraces,
              FormatStyle::BS_Allman);
  CHECK_PARSE("BreakBeforeBraces: GNU", BreakBeforeBraces, FormatStyle::BS_GNU);
  CHECK_PARSE("BreakBeforeBraces: WebKit", BreakBeforeBraces,
              FormatStyle::BS_WebKit);
  CHECK_PARSE("BreakBeforeBraces: Custom", BreakBeforeBraces,
              FormatStyle::BS_Custom);

  Style.AlwaysBreakAfterReturnType = FormatStyle::RTBS_All;
  CHECK_PARSE("AlwaysBreakAfterReturnType: None", AlwaysBreakAfterReturnType,
              FormatStyle::RTBS_None);
  CHECK_PARSE("AlwaysBreakAfterReturnType: All", AlwaysBreakAfterReturnType,
              FormatStyle::RTBS_All);
  CHECK_PARSE("AlwaysBreakAfterReturnType: TopLevel",
              AlwaysBreakAfterReturnType, FormatStyle::RTBS_TopLevel);
  CHECK_PARSE("AlwaysBreakAfterReturnType: AllDefinitions",
              AlwaysBreakAfterReturnType, FormatStyle::RTBS_AllDefinitions);
  CHECK_PARSE("AlwaysBreakAfterReturnType: TopLevelDefinitions",
              AlwaysBreakAfterReturnType,
              FormatStyle::RTBS_TopLevelDefinitions);

  Style.AlwaysBreakAfterDefinitionReturnType = FormatStyle::DRTBS_All;
  CHECK_PARSE("AlwaysBreakAfterDefinitionReturnType: None",
              AlwaysBreakAfterDefinitionReturnType, FormatStyle::DRTBS_None);
  CHECK_PARSE("AlwaysBreakAfterDefinitionReturnType: All",
              AlwaysBreakAfterDefinitionReturnType, FormatStyle::DRTBS_All);
  CHECK_PARSE("AlwaysBreakAfterDefinitionReturnType: TopLevel",
              AlwaysBreakAfterDefinitionReturnType,
              FormatStyle::DRTBS_TopLevel);

  Style.NamespaceIndentation = FormatStyle::NI_All;
  CHECK_PARSE("NamespaceIndentation: None", NamespaceIndentation,
              FormatStyle::NI_None);
  CHECK_PARSE("NamespaceIndentation: Inner", NamespaceIndentation,
              FormatStyle::NI_Inner);
  CHECK_PARSE("NamespaceIndentation: All", NamespaceIndentation,
              FormatStyle::NI_All);

  // FIXME: This is required because parsing a configuration simply overwrites
  // the first N elements of the list instead of resetting it.
  Style.ForEachMacros.clear();
  std::vector<std::string> BoostForeach;
  BoostForeach.push_back("BOOST_FOREACH");
  CHECK_PARSE("ForEachMacros: [BOOST_FOREACH]", ForEachMacros, BoostForeach);
  std::vector<std::string> BoostAndQForeach;
  BoostAndQForeach.push_back("BOOST_FOREACH");
  BoostAndQForeach.push_back("Q_FOREACH");
  CHECK_PARSE("ForEachMacros: [BOOST_FOREACH, Q_FOREACH]", ForEachMacros,
              BoostAndQForeach);

  Style.IncludeCategories.clear();
  std::vector<FormatStyle::IncludeCategory> ExpectedCategories = {{"abc/.*", 2},
                                                                  {".*", 1}};
  CHECK_PARSE("IncludeCategories:\n"
              "  - Regex: abc/.*\n"
              "    Priority: 2\n"
              "  - Regex: .*\n"
              "    Priority: 1",
              IncludeCategories, ExpectedCategories);
  CHECK_PARSE("IncludeIsMainRegex: 'abc$'", IncludeIsMainRegex, "abc$");
}

TEST_F(FormatTest, ParsesConfigurationWithLanguages) {
  FormatStyle Style = {};
  Style.Language = FormatStyle::LK_Cpp;
  CHECK_PARSE("Language: Cpp\n"
              "IndentWidth: 12",
              IndentWidth, 12u);
  EXPECT_EQ(parseConfiguration("Language: JavaScript\n"
                               "IndentWidth: 34",
                               &Style),
            ParseError::Unsuitable);
  EXPECT_EQ(12u, Style.IndentWidth);
  CHECK_PARSE("IndentWidth: 56", IndentWidth, 56u);
  EXPECT_EQ(FormatStyle::LK_Cpp, Style.Language);

  Style.Language = FormatStyle::LK_JavaScript;
  CHECK_PARSE("Language: JavaScript\n"
              "IndentWidth: 12",
              IndentWidth, 12u);
  CHECK_PARSE("IndentWidth: 23", IndentWidth, 23u);
  EXPECT_EQ(parseConfiguration("Language: Cpp\n"
                               "IndentWidth: 34",
                               &Style),
            ParseError::Unsuitable);
  EXPECT_EQ(23u, Style.IndentWidth);
  CHECK_PARSE("IndentWidth: 56", IndentWidth, 56u);
  EXPECT_EQ(FormatStyle::LK_JavaScript, Style.Language);

  CHECK_PARSE("BasedOnStyle: LLVM\n"
              "IndentWidth: 67",
              IndentWidth, 67u);

  CHECK_PARSE("---\n"
              "Language: JavaScript\n"
              "IndentWidth: 12\n"
              "---\n"
              "Language: Cpp\n"
              "IndentWidth: 34\n"
              "...\n",
              IndentWidth, 12u);

  Style.Language = FormatStyle::LK_Cpp;
  CHECK_PARSE("---\n"
              "Language: JavaScript\n"
              "IndentWidth: 12\n"
              "---\n"
              "Language: Cpp\n"
              "IndentWidth: 34\n"
              "...\n",
              IndentWidth, 34u);
  CHECK_PARSE("---\n"
              "IndentWidth: 78\n"
              "---\n"
              "Language: JavaScript\n"
              "IndentWidth: 56\n"
              "...\n",
              IndentWidth, 78u);

  Style.ColumnLimit = 123;
  Style.IndentWidth = 234;
  Style.BreakBeforeBraces = FormatStyle::BS_Linux;
  Style.TabWidth = 345;
  EXPECT_FALSE(parseConfiguration("---\n"
                                  "IndentWidth: 456\n"
                                  "BreakBeforeBraces: Allman\n"
                                  "---\n"
                                  "Language: JavaScript\n"
                                  "IndentWidth: 111\n"
                                  "TabWidth: 111\n"
                                  "---\n"
                                  "Language: Cpp\n"
                                  "BreakBeforeBraces: Stroustrup\n"
                                  "TabWidth: 789\n"
                                  "...\n",
                                  &Style));
  EXPECT_EQ(123u, Style.ColumnLimit);
  EXPECT_EQ(456u, Style.IndentWidth);
  EXPECT_EQ(FormatStyle::BS_Stroustrup, Style.BreakBeforeBraces);
  EXPECT_EQ(789u, Style.TabWidth);

  EXPECT_EQ(parseConfiguration("---\n"
                               "Language: JavaScript\n"
                               "IndentWidth: 56\n"
                               "---\n"
                               "IndentWidth: 78\n"
                               "...\n",
                               &Style),
            ParseError::Error);
  EXPECT_EQ(parseConfiguration("---\n"
                               "Language: JavaScript\n"
                               "IndentWidth: 56\n"
                               "---\n"
                               "Language: JavaScript\n"
                               "IndentWidth: 78\n"
                               "...\n",
                               &Style),
            ParseError::Error);

  EXPECT_EQ(FormatStyle::LK_Cpp, Style.Language);
}

#undef CHECK_PARSE

TEST_F(FormatTest, UsesLanguageForBasedOnStyle) {
  FormatStyle Style = {};
  Style.Language = FormatStyle::LK_JavaScript;
  Style.BreakBeforeTernaryOperators = true;
  EXPECT_EQ(0, parseConfiguration("BasedOnStyle: Google", &Style).value());
  EXPECT_FALSE(Style.BreakBeforeTernaryOperators);

  Style.BreakBeforeTernaryOperators = true;
  EXPECT_EQ(0, parseConfiguration("---\n"
                                  "BasedOnStyle: Google\n"
                                  "---\n"
                                  "Language: JavaScript\n"
                                  "IndentWidth: 76\n"
                                  "...\n",
                                  &Style)
                   .value());
  EXPECT_FALSE(Style.BreakBeforeTernaryOperators);
  EXPECT_EQ(76u, Style.IndentWidth);
  EXPECT_EQ(FormatStyle::LK_JavaScript, Style.Language);
}

TEST_F(FormatTest, ConfigurationRoundTripTest) {
  FormatStyle Style = getLLVMStyle();
  std::string YAML = configurationAsText(Style);
  FormatStyle ParsedStyle = {};
  ParsedStyle.Language = FormatStyle::LK_Cpp;
  EXPECT_EQ(0, parseConfiguration(YAML, &ParsedStyle).value());
  EXPECT_EQ(Style, ParsedStyle);
}

TEST_F(FormatTest, WorksFor8bitEncodings) {
  EXPECT_EQ("\"\xce\xe4\xed\xe0\xe6\xe4\xfb \xe2 \"\n"
            "\"\xf1\xf2\xf3\xe4\xb8\xed\xf3\xfe \"\n"
            "\"\xe7\xe8\xec\xed\xfe\xfe \"\n"
            "\"\xef\xee\xf0\xf3...\"",
            format("\"\xce\xe4\xed\xe0\xe6\xe4\xfb \xe2 "
                   "\xf1\xf2\xf3\xe4\xb8\xed\xf3\xfe \xe7\xe8\xec\xed\xfe\xfe "
                   "\xef\xee\xf0\xf3...\"",
                   getLLVMStyleWithColumns(12)));
}

TEST_F(FormatTest, HandlesUTF8BOM) {
  EXPECT_EQ("\xef\xbb\xbf", format("\xef\xbb\xbf"));
  EXPECT_EQ("\xef\xbb\xbf#include <iostream>",
            format("\xef\xbb\xbf#include <iostream>"));
  EXPECT_EQ("\xef\xbb\xbf\n#include <iostream>",
            format("\xef\xbb\xbf\n#include <iostream>"));
}

// FIXME: Encode Cyrillic and CJK characters below to appease MS compilers.
#if !defined(_MSC_VER)

TEST_F(FormatTest, CountsUTF8CharactersProperly) {
  verifyFormat("\"Однажды в студёную зимнюю пору...\"",
               getLLVMStyleWithColumns(35));
  verifyFormat("\"一 二 三 四 五 六 七 八 九 十\"",
               getLLVMStyleWithColumns(31));
  verifyFormat("// Однажды в студёную зимнюю пору...",
               getLLVMStyleWithColumns(36));
  verifyFormat("// 一 二 三 四 五 六 七 八 九 十", getLLVMStyleWithColumns(32));
  verifyFormat("/* Однажды в студёную зимнюю пору... */",
               getLLVMStyleWithColumns(39));
  verifyFormat("/* 一 二 三 四 五 六 七 八 九 十 */",
               getLLVMStyleWithColumns(35));
}

TEST_F(FormatTest, SplitsUTF8Strings) {
  // Non-printable characters' width is currently considered to be the length in
  // bytes in UTF8. The characters can be displayed in very different manner
  // (zero-width, single width with a substitution glyph, expanded to their code
  // (e.g. "<8d>"), so there's no single correct way to handle them.
  EXPECT_EQ("\"aaaaÄ\"\n"
            "\"\xc2\x8d\";",
            format("\"aaaaÄ\xc2\x8d\";", getLLVMStyleWithColumns(10)));
  EXPECT_EQ("\"aaaaaaaÄ\"\n"
            "\"\xc2\x8d\";",
            format("\"aaaaaaaÄ\xc2\x8d\";", getLLVMStyleWithColumns(10)));
  EXPECT_EQ("\"Однажды, в \"\n"
            "\"студёную \"\n"
            "\"зимнюю \"\n"
            "\"пору,\"",
            format("\"Однажды, в студёную зимнюю пору,\"",
                   getLLVMStyleWithColumns(13)));
  EXPECT_EQ(
      "\"一 二 三 \"\n"
      "\"四 五六 \"\n"
      "\"七 八 九 \"\n"
      "\"十\"",
      format("\"一 二 三 四 五六 七 八 九 十\"", getLLVMStyleWithColumns(11)));
  EXPECT_EQ("\"一\t二 \"\n"
            "\"\t三 \"\n"
            "\"四 五\t六 \"\n"
            "\"\t七 \"\n"
            "\"八九十\tqq\"",
            format("\"一\t二 \t三 四 五\t六 \t七 八九十\tqq\"",
                   getLLVMStyleWithColumns(11)));

  // UTF8 character in an escape sequence.
  EXPECT_EQ("\"aaaaaa\"\n"
            "\"\\\xC2\x8D\"",
            format("\"aaaaaa\\\xC2\x8D\"", getLLVMStyleWithColumns(10)));
}

TEST_F(FormatTest, HandlesDoubleWidthCharsInMultiLineStrings) {
  EXPECT_EQ("const char *sssss =\n"
            "    \"一二三四五六七八\\\n"
            " 九 十\";",
            format("const char *sssss = \"一二三四五六七八\\\n"
                   " 九 十\";",
                   getLLVMStyleWithColumns(30)));
}

TEST_F(FormatTest, SplitsUTF8LineComments) {
  EXPECT_EQ("// aaaaÄ\xc2\x8d",
            format("// aaaaÄ\xc2\x8d", getLLVMStyleWithColumns(10)));
  EXPECT_EQ("// Я из лесу\n"
            "// вышел; был\n"
            "// сильный\n"
            "// мороз.",
            format("// Я из лесу вышел; был сильный мороз.",
                   getLLVMStyleWithColumns(13)));
  EXPECT_EQ("// 一二三\n"
            "// 四五六七\n"
            "// 八  九\n"
            "// 十",
            format("// 一二三 四五六七 八  九 十", getLLVMStyleWithColumns(9)));
}

TEST_F(FormatTest, SplitsUTF8BlockComments) {
  EXPECT_EQ("/* Гляжу,\n"
            " * поднимается\n"
            " * медленно в\n"
            " * гору\n"
            " * Лошадка,\n"
            " * везущая\n"
            " * хворосту\n"
            " * воз. */",
            format("/* Гляжу, поднимается медленно в гору\n"
                   " * Лошадка, везущая хворосту воз. */",
                   getLLVMStyleWithColumns(13)));
  EXPECT_EQ(
      "/* 一二三\n"
      " * 四五六七\n"
      " * 八  九\n"
      " * 十  */",
      format("/* 一二三 四五六七 八  九 十  */", getLLVMStyleWithColumns(9)));
  EXPECT_EQ("/* 𝓣𝓮𝓼𝓽 𝔣𝔬𝔲𝔯\n"
            " * 𝕓𝕪𝕥𝕖\n"
            " * 𝖀𝕿𝕱-𝟠 */",
            format("/* 𝓣𝓮𝓼𝓽 𝔣𝔬𝔲𝔯 𝕓𝕪𝕥𝕖 𝖀𝕿𝕱-𝟠 */", getLLVMStyleWithColumns(12)));
}

#endif // _MSC_VER

TEST_F(FormatTest, ConstructorInitializerIndentWidth) {
  FormatStyle Style = getLLVMStyle();

  Style.ConstructorInitializerIndentWidth = 4;
  verifyFormat(
      "SomeClass::Constructor()\n"
      "    : aaaaaaaaaaaaa(aaaaaaaaaaaaaa), aaaaaaaaaaaaa(aaaaaaaaaaaaaa),\n"
      "      aaaaaaaaaaaaa(aaaaaaaaaaaaaa) {}",
      Style);

  Style.ConstructorInitializerIndentWidth = 2;
  verifyFormat(
      "SomeClass::Constructor()\n"
      "  : aaaaaaaaaaaaa(aaaaaaaaaaaaaa), aaaaaaaaaaaaa(aaaaaaaaaaaaaa),\n"
      "    aaaaaaaaaaaaa(aaaaaaaaaaaaaa) {}",
      Style);

  Style.ConstructorInitializerIndentWidth = 0;
  verifyFormat(
      "SomeClass::Constructor()\n"
      ": aaaaaaaaaaaaa(aaaaaaaaaaaaaa), aaaaaaaaaaaaa(aaaaaaaaaaaaaa),\n"
      "  aaaaaaaaaaaaa(aaaaaaaaaaaaaa) {}",
      Style);
  Style.AlignAfterOpenBracket = FormatStyle::BAS_AlwaysBreak;
  verifyFormat(
      "SomeLongTemplateVariableName<\n"
      "    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa>",
      Style);
  verifyFormat(
      "bool smaller = 1 < bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb(\n"
      "                       aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa);",
      Style);
}

TEST_F(FormatTest, BreakConstructorInitializersBeforeComma) {
  FormatStyle Style = getLLVMStyle();
  Style.BreakConstructorInitializersBeforeComma = true;
  Style.ConstructorInitializerIndentWidth = 4;
  verifyFormat("SomeClass::Constructor()\n"
               "    : a(a)\n"
               "    , b(b)\n"
               "    , c(c) {}",
               Style);
  verifyFormat("SomeClass::Constructor()\n"
               "    : a(a) {}",
               Style);

  Style.ColumnLimit = 0;
  verifyFormat("SomeClass::Constructor()\n"
               "    : a(a) {}",
               Style);
  verifyFormat("SomeClass::Constructor() noexcept\n"
               "    : a(a) {}",
               Style);
  verifyFormat("SomeClass::Constructor()\n"
               "    : a(a)\n"
               "    , b(b)\n"
               "    , c(c) {}",
               Style);
  verifyFormat("SomeClass::Constructor()\n"
               "    : a(a) {\n"
               "  foo();\n"
               "  bar();\n"
               "}",
               Style);

  Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_None;
  verifyFormat("SomeClass::Constructor()\n"
               "    : a(a)\n"
               "    , b(b)\n"
               "    , c(c) {\n}",
               Style);
  verifyFormat("SomeClass::Constructor()\n"
               "    : a(a) {\n}",
               Style);

  Style.ColumnLimit = 80;
  Style.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_All;
  Style.ConstructorInitializerIndentWidth = 2;
  verifyFormat("SomeClass::Constructor()\n"
               "  : a(a)\n"
               "  , b(b)\n"
               "  , c(c) {}",
               Style);

  Style.ConstructorInitializerIndentWidth = 0;
  verifyFormat("SomeClass::Constructor()\n"
               ": a(a)\n"
               ", b(b)\n"
               ", c(c) {}",
               Style);

  Style.ConstructorInitializerAllOnOneLineOrOnePerLine = true;
  Style.ConstructorInitializerIndentWidth = 4;
  verifyFormat("SomeClass::Constructor() : aaaaaaaa(aaaaaaaa) {}", Style);
  verifyFormat(
      "SomeClass::Constructor() : aaaaa(aaaaa), aaaaa(aaaaa), aaaaa(aaaaa)\n",
      Style);
  verifyFormat(
      "SomeClass::Constructor()\n"
      "    : aaaaaaaa(aaaaaaaa), aaaaaaaa(aaaaaaaa), aaaaaaaa(aaaaaaaa) {}",
      Style);
  Style.ConstructorInitializerIndentWidth = 4;
  Style.ColumnLimit = 60;
  verifyFormat("SomeClass::Constructor()\n"
               "    : aaaaaaaa(aaaaaaaa)\n"
               "    , aaaaaaaa(aaaaaaaa)\n"
               "    , aaaaaaaa(aaaaaaaa) {}",
               Style);
}

TEST_F(FormatTest, Destructors) {
  verifyFormat("void F(int &i) { i.~int(); }");
  verifyFormat("void F(int &i) { i->~int(); }");
}

TEST_F(FormatTest, FormatsWithWebKitStyle) {
  FormatStyle Style = getWebKitStyle();

  // Don't indent in outer namespaces.
  verifyFormat("namespace outer {\n"
               "int i;\n"
               "namespace inner {\n"
               "    int i;\n"
               "} // namespace inner\n"
               "} // namespace outer\n"
               "namespace other_outer {\n"
               "int i;\n"
               "}",
               Style);

  // Don't indent case labels.
  verifyFormat("switch (variable) {\n"
               "case 1:\n"
               "case 2:\n"
               "    doSomething();\n"
               "    break;\n"
               "default:\n"
               "    ++variable;\n"
               "}",
               Style);

  // Wrap before binary operators.
  EXPECT_EQ("void f()\n"
            "{\n"
            "    if (aaaaaaaaaaaaaaaa\n"
            "        && bbbbbbbbbbbbbbbbbbbbbbbb\n"
            "        && (cccccccccccccccccccccccccc || dddddddddddddddddddd))\n"
            "        return;\n"
            "}",
            format("void f() {\n"
                   "if (aaaaaaaaaaaaaaaa\n"
                   "&& bbbbbbbbbbbbbbbbbbbbbbbb\n"
                   "&& (cccccccccccccccccccccccccc || dddddddddddddddddddd))\n"
                   "return;\n"
                   "}",
                   Style));

  // Allow functions on a single line.
  verifyFormat("void f() { return; }", Style);

  // Constructor initializers are formatted one per line with the "," on the
  // new line.
  verifyFormat("Constructor()\n"
               "    : aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaaaaaaaaaaaaaaa)\n"
               "    , aaaaaaaaaaaaaaaaaaaaaaaa(aaaaaaaaaaaaaa, // break\n"
               "          aaaaaaaaaaaaaa)\n"
               "    , aaaaaaaaaaaaaaaaaaaaaaa()\n"
               "{\n"
               "}",
               Style);
  verifyFormat("SomeClass::Constructor()\n"
               "    : a(a)\n"
               "{\n"
               "}",
               Style);
  EXPECT_EQ("SomeClass::Constructor()\n"
            "    : a(a)\n"
            "{\n"
            "}",
            format("SomeClass::Constructor():a(a){}", Style));
  verifyFormat("SomeClass::Constructor()\n"
               "    : a(a)\n"
               "    , b(b)\n"
               "    , c(c)\n"
               "{\n"
               "}",
               Style);
  verifyFormat("SomeClass::Constructor()\n"
               "    : a(a)\n"
               "{\n"
               "    foo();\n"
               "    bar();\n"
               "}",
               Style);

  // Access specifiers should be aligned left.
  verifyFormat("class C {\n"
               "public:\n"
               "    int i;\n"
               "};",
               Style);

  // Do not align comments.
  verifyFormat("int a; // Do not\n"
               "double b; // align comments.",
               Style);

  // Do not align operands.
  EXPECT_EQ("ASSERT(aaaa\n"
            "    || bbbb);",
            format("ASSERT ( aaaa\n||bbbb);", Style));

  // Accept input's line breaks.
  EXPECT_EQ("if (aaaaaaaaaaaaaaa\n"
            "    || bbbbbbbbbbbbbbb) {\n"
            "    i++;\n"
            "}",
            format("if (aaaaaaaaaaaaaaa\n"
                   "|| bbbbbbbbbbbbbbb) { i++; }",
                   Style));
  EXPECT_EQ("if (aaaaaaaaaaaaaaa || bbbbbbbbbbbbbbb) {\n"
            "    i++;\n"
            "}",
            format("if (aaaaaaaaaaaaaaa || bbbbbbbbbbbbbbb) { i++; }", Style));

  // Don't automatically break all macro definitions (llvm.org/PR17842).
  verifyFormat("#define aNumber 10", Style);
  // However, generally keep the line breaks that the user authored.
  EXPECT_EQ("#define aNumber \\\n"
            "    10",
            format("#define aNumber \\\n"
                   " 10",
                   Style));

  // Keep empty and one-element array literals on a single line.
  EXPECT_EQ("NSArray* a = [[NSArray alloc] initWithArray:@[]\n"
            "                                  copyItems:YES];",
            format("NSArray*a=[[NSArray alloc] initWithArray:@[]\n"
                   "copyItems:YES];",
                   Style));
  EXPECT_EQ("NSArray* a = [[NSArray alloc] initWithArray:@[ @\"a\" ]\n"
            "                                  copyItems:YES];",
            format("NSArray*a=[[NSArray alloc]initWithArray:@[ @\"a\" ]\n"
                   "             copyItems:YES];",
                   Style));
  // FIXME: This does not seem right, there should be more indentation before
  // the array literal's entries. Nested blocks have the same problem.
  EXPECT_EQ("NSArray* a = [[NSArray alloc] initWithArray:@[\n"
            "    @\"a\",\n"
            "    @\"a\"\n"
            "]\n"
            "                                  copyItems:YES];",
            format("NSArray* a = [[NSArray alloc] initWithArray:@[\n"
                   "     @\"a\",\n"
                   "     @\"a\"\n"
                   "     ]\n"
                   "       copyItems:YES];",
                   Style));
  EXPECT_EQ(
      "NSArray* a = [[NSArray alloc] initWithArray:@[ @\"a\", @\"a\" ]\n"
      "                                  copyItems:YES];",
      format("NSArray* a = [[NSArray alloc] initWithArray:@[ @\"a\", @\"a\" ]\n"
             "   copyItems:YES];",
             Style));

  verifyFormat("[self.a b:c c:d];", Style);
  EXPECT_EQ("[self.a b:c\n"
            "        c:d];",
            format("[self.a b:c\n"
                   "c:d];",
                   Style));
}

TEST_F(FormatTest, FormatsLambdas) {
  verifyFormat("int c = [b]() mutable { return [&b] { return b++; }(); }();\n");
  verifyFormat("int c = [&] { [=] { return b++; }(); }();\n");
  verifyFormat("int c = [&, &a, a] { [=, c, &d] { return b++; }(); }();\n");
  verifyFormat("int c = [&a, &a, a] { [=, a, b, &c] { return b++; }(); }();\n");
  verifyFormat("auto c = {[&a, &a, a] { [=, a, b, &c] { return b++; }(); }}\n");
  verifyFormat("auto c = {[&a, &a, a] { [=, a, b, &c] {}(); }}\n");
  verifyFormat("int x = f(*+[] {});");
  verifyFormat("void f() {\n"
               "  other(x.begin(), x.end(), [&](int, int) { return 1; });\n"
               "}\n");
  verifyFormat("void f() {\n"
               "  other(x.begin(), //\n"
               "        x.end(),   //\n"
               "        [&](int, int) { return 1; });\n"
               "}\n");
  verifyFormat("SomeFunction([]() { // A cool function...\n"
               "  return 43;\n"
               "});");
  EXPECT_EQ("SomeFunction([]() {\n"
            "#define A a\n"
            "  return 43;\n"
            "});",
            format("SomeFunction([](){\n"
                   "#define A a\n"
                   "return 43;\n"
                   "});"));
  verifyFormat("void f() {\n"
               "  SomeFunction([](decltype(x), A *a) {});\n"
               "}");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa(\n"
               "    [](const aaaaaaaaaa &a) { return a; });");
  verifyFormat("string abc = SomeFunction(aaaaaaaaaaaaa, aaaaa, []() {\n"
               "  SomeOtherFunctioooooooooooooooooooooooooon();\n"
               "});");
  verifyFormat("Constructor()\n"
               "    : Field([] { // comment\n"
               "        int i;\n"
               "      }) {}");
  verifyFormat("auto my_lambda = [](const string &some_parameter) {\n"
               "  return some_parameter.size();\n"
               "};");
  verifyFormat("std::function<std::string(const std::string &)> my_lambda =\n"
               "    [](const string &s) { return s; };");
  verifyFormat("int i = aaaaaa ? 1 //\n"
               "               : [] {\n"
               "                   return 2; //\n"
               "                 }();");
  verifyFormat("llvm::errs() << \"number of twos is \"\n"
               "             << std::count_if(v.begin(), v.end(), [](int x) {\n"
               "                  return x == 2; // force break\n"
               "                });");
  verifyFormat("return aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa([=](\n"
               "    int iiiiiiiiiiii) {\n"
               "  return aaaaaaaaaaaaaaaaaaaaaaa != aaaaaaaaaaaaaaaaaaaaaaa;\n"
               "});",
               getLLVMStyleWithColumns(60));
  verifyFormat("SomeFunction({[&] {\n"
               "                // comment\n"
               "              },\n"
               "              [&] {\n"
               "                // comment\n"
               "              }});");
  verifyFormat("SomeFunction({[&] {\n"
               "  // comment\n"
               "}});");
  verifyFormat("virtual aaaaaaaaaaaaaaaa(std::function<bool()> bbbbbbbbbbbb =\n"
               "                             [&]() { return true; },\n"
               "                         aaaaa aaaaaaaaa);");

  // Lambdas with return types.
  verifyFormat("int c = []() -> int { return 2; }();\n");
  verifyFormat("int c = []() -> int * { return 2; }();\n");
  verifyFormat("int c = []() -> vector<int> { return {2}; }();\n");
  verifyFormat("Foo([]() -> std::vector<int> { return {2}; }());");
  verifyGoogleFormat("auto a = [&b, c](D* d) -> D* {};");
  verifyGoogleFormat("auto a = [&b, c](D* d) -> pair<D*, D*> {};");
  verifyGoogleFormat("auto a = [&b, c](D* d) -> D& {};");
  verifyGoogleFormat("auto a = [&b, c](D* d) -> const D* {};");
  verifyFormat("[a, a]() -> a<1> {};");
  verifyFormat("auto aaaaaaaa = [](int i, // break for some reason\n"
               "                   int j) -> int {\n"
               "  return ffffffffffffffffffffffffffffffffffffffffffff(i * j);\n"
               "};");
  verifyFormat(
      "aaaaaaaaaaaaaaaaaaaaaa(\n"
      "    [](aaaaaaaaaaaaaaaaaaaaaaaaaaa &aaa) -> aaaaaaaaaaaaaaaa {\n"
      "      return aaaaaaaaaaaaaaaaa;\n"
      "    });",
      getLLVMStyleWithColumns(70));
  verifyFormat("[]() //\n"
               "    -> int {\n"
               "  return 1; //\n"
               "};");

  // Multiple lambdas in the same parentheses change indentation rules.
  verifyFormat("SomeFunction(\n"
               "    []() {\n"
               "      int i = 42;\n"
               "      return i;\n"
               "    },\n"
               "    []() {\n"
               "      int j = 43;\n"
               "      return j;\n"
               "    });");

  // More complex introducers.
  verifyFormat("return [i, args...] {};");

  // Not lambdas.
  verifyFormat("constexpr char hello[]{\"hello\"};");
  verifyFormat("double &operator[](int i) { return 0; }\n"
               "int i;");
  verifyFormat("std::unique_ptr<int[]> foo() {}");
  verifyFormat("int i = a[a][a]->f();");
  verifyFormat("int i = (*b)[a]->f();");

  // Other corner cases.
  verifyFormat("void f() {\n"
               "  bar([]() {} // Did not respect SpacesBeforeTrailingComments\n"
               "      );\n"
               "}");

  // Lambdas created through weird macros.
  verifyFormat("void f() {\n"
               "  MACRO((const AA &a) { return 1; });\n"
               "  MACRO((AA &a) { return 1; });\n"
               "}");

  verifyFormat("if (blah_blah(whatever, whatever, [] {\n"
               "      doo_dah();\n"
               "      doo_dah();\n"
               "    })) {\n"
               "}");
  verifyFormat("auto lambda = []() {\n"
               "  int a = 2\n"
               "#if A\n"
               "          + 2\n"
               "#endif\n"
               "      ;\n"
               "};");
}

TEST_F(FormatTest, FormatsBlocks) {
  FormatStyle ShortBlocks = getLLVMStyle();
  ShortBlocks.AllowShortBlocksOnASingleLine = true;
  verifyFormat("int (^Block)(int, int);", ShortBlocks);
  verifyFormat("int (^Block1)(int, int) = ^(int i, int j)", ShortBlocks);
  verifyFormat("void (^block)(int) = ^(id test) { int i; };", ShortBlocks);
  verifyFormat("void (^block)(int) = ^(int test) { int i; };", ShortBlocks);
  verifyFormat("void (^block)(int) = ^id(int test) { int i; };", ShortBlocks);
  verifyFormat("void (^block)(int) = ^int(int test) { int i; };", ShortBlocks);

  verifyFormat("foo(^{ bar(); });", ShortBlocks);
  verifyFormat("foo(a, ^{ bar(); });", ShortBlocks);
  verifyFormat("{ void (^block)(Object *x); }", ShortBlocks);

  verifyFormat("[operation setCompletionBlock:^{\n"
               "  [self onOperationDone];\n"
               "}];");
  verifyFormat("int i = {[operation setCompletionBlock:^{\n"
               "  [self onOperationDone];\n"
               "}]};");
  verifyFormat("[operation setCompletionBlock:^(int *i) {\n"
               "  f();\n"
               "}];");
  verifyFormat("int a = [operation block:^int(int *i) {\n"
               "  return 1;\n"
               "}];");
  verifyFormat("[myObject doSomethingWith:arg1\n"
               "                      aaa:^int(int *a) {\n"
               "                        return 1;\n"
               "                      }\n"
               "                      bbb:f(a * bbbbbbbb)];");

  verifyFormat("[operation setCompletionBlock:^{\n"
               "  [self.delegate newDataAvailable];\n"
               "}];",
               getLLVMStyleWithColumns(60));
  verifyFormat("dispatch_async(_fileIOQueue, ^{\n"
               "  NSString *path = [self sessionFilePath];\n"
               "  if (path) {\n"
               "    // ...\n"
               "  }\n"
               "});");
  verifyFormat("[[SessionService sharedService]\n"
               "    loadWindowWithCompletionBlock:^(SessionWindow *window) {\n"
               "      if (window) {\n"
               "        [self windowDidLoad:window];\n"
               "      } else {\n"
               "        [self errorLoadingWindow];\n"
               "      }\n"
               "    }];");
  verifyFormat("void (^largeBlock)(void) = ^{\n"
               "  // ...\n"
               "};\n",
               getLLVMStyleWithColumns(40));
  verifyFormat("[[SessionService sharedService]\n"
               "    loadWindowWithCompletionBlock: //\n"
               "        ^(SessionWindow *window) {\n"
               "          if (window) {\n"
               "            [self windowDidLoad:window];\n"
               "          } else {\n"
               "            [self errorLoadingWindow];\n"
               "          }\n"
               "        }];",
               getLLVMStyleWithColumns(60));
  verifyFormat("[myObject doSomethingWith:arg1\n"
               "    firstBlock:^(Foo *a) {\n"
               "      // ...\n"
               "      int i;\n"
               "    }\n"
               "    secondBlock:^(Bar *b) {\n"
               "      // ...\n"
               "      int i;\n"
               "    }\n"
               "    thirdBlock:^Foo(Bar *b) {\n"
               "      // ...\n"
               "      int i;\n"
               "    }];");
  verifyFormat("[myObject doSomethingWith:arg1\n"
               "               firstBlock:-1\n"
               "              secondBlock:^(Bar *b) {\n"
               "                // ...\n"
               "                int i;\n"
               "              }];");

  verifyFormat("f(^{\n"
               "  @autoreleasepool {\n"
               "    if (a) {\n"
               "      g();\n"
               "    }\n"
               "  }\n"
               "});");
  verifyFormat("Block b = ^int *(A *a, B *b) {}");
  verifyFormat("BOOL (^aaa)(void) = ^BOOL {\n"
               "};");

  FormatStyle FourIndent = getLLVMStyle();
  FourIndent.ObjCBlockIndentWidth = 4;
  verifyFormat("[operation setCompletionBlock:^{\n"
               "    [self onOperationDone];\n"
               "}];",
               FourIndent);
}

TEST_F(FormatTest, FormatsBlocksWithZeroColumnWidth) {
  FormatStyle ZeroColumn = getLLVMStyle();
  ZeroColumn.ColumnLimit = 0;

  verifyFormat("[[SessionService sharedService] "
               "loadWindowWithCompletionBlock:^(SessionWindow *window) {\n"
               "  if (window) {\n"
               "    [self windowDidLoad:window];\n"
               "  } else {\n"
               "    [self errorLoadingWindow];\n"
               "  }\n"
               "}];",
               ZeroColumn);
  EXPECT_EQ("[[SessionService sharedService]\n"
            "    loadWindowWithCompletionBlock:^(SessionWindow *window) {\n"
            "      if (window) {\n"
            "        [self windowDidLoad:window];\n"
            "      } else {\n"
            "        [self errorLoadingWindow];\n"
            "      }\n"
            "    }];",
            format("[[SessionService sharedService]\n"
                   "loadWindowWithCompletionBlock:^(SessionWindow *window) {\n"
                   "                if (window) {\n"
                   "    [self windowDidLoad:window];\n"
                   "  } else {\n"
                   "    [self errorLoadingWindow];\n"
                   "  }\n"
                   "}];",
                   ZeroColumn));
  verifyFormat("[myObject doSomethingWith:arg1\n"
               "    firstBlock:^(Foo *a) {\n"
               "      // ...\n"
               "      int i;\n"
               "    }\n"
               "    secondBlock:^(Bar *b) {\n"
               "      // ...\n"
               "      int i;\n"
               "    }\n"
               "    thirdBlock:^Foo(Bar *b) {\n"
               "      // ...\n"
               "      int i;\n"
               "    }];",
               ZeroColumn);
  verifyFormat("f(^{\n"
               "  @autoreleasepool {\n"
               "    if (a) {\n"
               "      g();\n"
               "    }\n"
               "  }\n"
               "});",
               ZeroColumn);
  verifyFormat("void (^largeBlock)(void) = ^{\n"
               "  // ...\n"
               "};",
               ZeroColumn);

  ZeroColumn.AllowShortBlocksOnASingleLine = true;
  EXPECT_EQ("void (^largeBlock)(void) = ^{ int i; };",
            format("void   (^largeBlock)(void) = ^{ int   i; };", ZeroColumn));
  ZeroColumn.AllowShortBlocksOnASingleLine = false;
  EXPECT_EQ("void (^largeBlock)(void) = ^{\n"
            "  int i;\n"
            "};",
            format("void   (^largeBlock)(void) = ^{ int   i; };", ZeroColumn));
}

TEST_F(FormatTest, SupportsCRLF) {
  EXPECT_EQ("int a;\r\n"
            "int b;\r\n"
            "int c;\r\n",
            format("int a;\r\n"
                   "  int b;\r\n"
                   "    int c;\r\n",
                   getLLVMStyle()));
  EXPECT_EQ("int a;\r\n"
            "int b;\r\n"
            "int c;\r\n",
            format("int a;\r\n"
                   "  int b;\n"
                   "    int c;\r\n",
                   getLLVMStyle()));
  EXPECT_EQ("int a;\n"
            "int b;\n"
            "int c;\n",
            format("int a;\r\n"
                   "  int b;\n"
                   "    int c;\n",
                   getLLVMStyle()));
  EXPECT_EQ("\"aaaaaaa \"\r\n"
            "\"bbbbbbb\";\r\n",
            format("\"aaaaaaa bbbbbbb\";\r\n", getLLVMStyleWithColumns(10)));
  EXPECT_EQ("#define A \\\r\n"
            "  b;      \\\r\n"
            "  c;      \\\r\n"
            "  d;\r\n",
            format("#define A \\\r\n"
                   "  b; \\\r\n"
                   "  c; d; \r\n",
                   getGoogleStyle()));

  EXPECT_EQ("/*\r\n"
            "multi line block comments\r\n"
            "should not introduce\r\n"
            "an extra carriage return\r\n"
            "*/\r\n",
            format("/*\r\n"
                   "multi line block comments\r\n"
                   "should not introduce\r\n"
                   "an extra carriage return\r\n"
                   "*/\r\n"));
}

TEST_F(FormatTest, MunchSemicolonAfterBlocks) {
  verifyFormat("MY_CLASS(C) {\n"
               "  int i;\n"
               "  int j;\n"
               "};");
}

TEST_F(FormatTest, ConfigurableContinuationIndentWidth) {
  FormatStyle TwoIndent = getLLVMStyleWithColumns(15);
  TwoIndent.ContinuationIndentWidth = 2;

  EXPECT_EQ("int i =\n"
            "  longFunction(\n"
            "    arg);",
            format("int i = longFunction(arg);", TwoIndent));

  FormatStyle SixIndent = getLLVMStyleWithColumns(20);
  SixIndent.ContinuationIndentWidth = 6;

  EXPECT_EQ("int i =\n"
            "      longFunction(\n"
            "            arg);",
            format("int i = longFunction(arg);", SixIndent));
}

TEST_F(FormatTest, SpacesInAngles) {
  FormatStyle Spaces = getLLVMStyle();
  Spaces.SpacesInAngles = true;

  verifyFormat("static_cast< int >(arg);", Spaces);
  verifyFormat("template < typename T0, typename T1 > void f() {}", Spaces);
  verifyFormat("f< int, float >();", Spaces);
  verifyFormat("template <> g() {}", Spaces);
  verifyFormat("template < std::vector< int > > f() {}", Spaces);
  verifyFormat("std::function< void(int, int) > fct;", Spaces);
  verifyFormat("void inFunction() { std::function< void(int, int) > fct; }",
               Spaces);

  Spaces.Standard = FormatStyle::LS_Cpp03;
  Spaces.SpacesInAngles = true;
  verifyFormat("A< A< int > >();", Spaces);

  Spaces.SpacesInAngles = false;
  verifyFormat("A<A<int> >();", Spaces);

  Spaces.Standard = FormatStyle::LS_Cpp11;
  Spaces.SpacesInAngles = true;
  verifyFormat("A< A< int > >();", Spaces);

  Spaces.SpacesInAngles = false;
  verifyFormat("A<A<int>>();", Spaces);
}

TEST_F(FormatTest, SpaceAfterTemplateKeyword) {
  FormatStyle Style = getLLVMStyle();
  Style.SpaceAfterTemplateKeyword = false;
  verifyFormat("template<int> void foo();", Style);
}

TEST_F(FormatTest, TripleAngleBrackets) {
  verifyFormat("f<<<1, 1>>>();");
  verifyFormat("f<<<1, 1, 1, s>>>();");
  verifyFormat("f<<<a, b, c, d>>>();");
  EXPECT_EQ("f<<<1, 1>>>();", format("f <<< 1, 1 >>> ();"));
  verifyFormat("f<param><<<1, 1>>>();");
  verifyFormat("f<1><<<1, 1>>>();");
  EXPECT_EQ("f<param><<<1, 1>>>();", format("f< param > <<< 1, 1 >>> ();"));
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
               "aaaaaaaaaaa<<<\n    1, 1>>>();");
  verifyFormat("aaaaaaaaaaaaaaa<aaaaaaaaa, aaaaaaaaaa, aaaaaaaaaaaaaa>\n"
               "    <<<aaaaaaaaa, aaaaaaaaaa, aaaaaaaaaaaaaaaaaa>>>();");
}

TEST_F(FormatTest, MergeLessLessAtEnd) {
  verifyFormat("<<");
  EXPECT_EQ("< < <", format("\\\n<<<"));
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
               "aaallvm::outs() <<");
  verifyFormat("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
               "aaaallvm::outs()\n    <<");
}

TEST_F(FormatTest, HandleUnbalancedImplicitBracesAcrossPPBranches) {
  std::string code = "#if A\n"
                     "#if B\n"
                     "a.\n"
                     "#endif\n"
                     "    a = 1;\n"
                     "#else\n"
                     "#endif\n"
                     "#if C\n"
                     "#else\n"
                     "#endif\n";
  EXPECT_EQ(code, format(code));
}

TEST_F(FormatTest, HandleConflictMarkers) {
  // Git/SVN conflict markers.
  EXPECT_EQ("int a;\n"
            "void f() {\n"
            "  callme(some(parameter1,\n"
            "<<<<<<< text by the vcs\n"
            "              parameter2),\n"
            "||||||| text by the vcs\n"
            "              parameter2),\n"
            "         parameter3,\n"
            "======= text by the vcs\n"
            "              parameter2, parameter3),\n"
            ">>>>>>> text by the vcs\n"
            "         otherparameter);\n",
            format("int a;\n"
                   "void f() {\n"
                   "  callme(some(parameter1,\n"
                   "<<<<<<< text by the vcs\n"
                   "  parameter2),\n"
                   "||||||| text by the vcs\n"
                   "  parameter2),\n"
                   "  parameter3,\n"
                   "======= text by the vcs\n"
                   "  parameter2,\n"
                   "  parameter3),\n"
                   ">>>>>>> text by the vcs\n"
                   "  otherparameter);\n"));

  // Perforce markers.
  EXPECT_EQ("void f() {\n"
            "  function(\n"
            ">>>> text by the vcs\n"
            "      parameter,\n"
            "==== text by the vcs\n"
            "      parameter,\n"
            "==== text by the vcs\n"
            "      parameter,\n"
            "<<<< text by the vcs\n"
            "      parameter);\n",
            format("void f() {\n"
                   "  function(\n"
                   ">>>> text by the vcs\n"
                   "  parameter,\n"
                   "==== text by the vcs\n"
                   "  parameter,\n"
                   "==== text by the vcs\n"
                   "  parameter,\n"
                   "<<<< text by the vcs\n"
                   "  parameter);\n"));

  EXPECT_EQ("<<<<<<<\n"
            "|||||||\n"
            "=======\n"
            ">>>>>>>",
            format("<<<<<<<\n"
                   "|||||||\n"
                   "=======\n"
                   ">>>>>>>"));

  EXPECT_EQ("<<<<<<<\n"
            "|||||||\n"
            "int i;\n"
            "=======\n"
            ">>>>>>>",
            format("<<<<<<<\n"
                   "|||||||\n"
                   "int i;\n"
                   "=======\n"
                   ">>>>>>>"));

  // FIXME: Handle parsing of macros around conflict markers correctly:
  EXPECT_EQ("#define Macro \\\n"
            "<<<<<<<\n"
            "Something \\\n"
            "|||||||\n"
            "Else \\\n"
            "=======\n"
            "Other \\\n"
            ">>>>>>>\n"
            "    End int i;\n",
            format("#define Macro \\\n"
                   "<<<<<<<\n"
                   "  Something \\\n"
                   "|||||||\n"
                   "  Else \\\n"
                   "=======\n"
                   "  Other \\\n"
                   ">>>>>>>\n"
                   "  End\n"
                   "int i;\n"));
}

TEST_F(FormatTest, DisableRegions) {
  EXPECT_EQ("int i;\n"
            "// clang-format off\n"
            "  int j;\n"
            "// clang-format on\n"
            "int k;",
            format(" int  i;\n"
                   "   // clang-format off\n"
                   "  int j;\n"
                   " // clang-format on\n"
                   "   int   k;"));
  EXPECT_EQ("int i;\n"
            "/* clang-format off */\n"
            "  int j;\n"
            "/* clang-format on */\n"
            "int k;",
            format(" int  i;\n"
                   "   /* clang-format off */\n"
                   "  int j;\n"
                   " /* clang-format on */\n"
                   "   int   k;"));

  // Don't reflow comments within disabled regions.
  EXPECT_EQ(
      "// clang-format off\n"
      "// long long long long long long line\n"
      "/* clang-format on */\n"
      "/* long long long\n"
      " * long long long\n"
      " * line */\n"
      "int i;\n"
      "/* clang-format off */\n"
      "/* long long long long long long line */\n",
      format("// clang-format off\n"
             "// long long long long long long line\n"
             "/* clang-format on */\n"
             "/* long long long long long long line */\n"
             "int i;\n"
             "/* clang-format off */\n"
             "/* long long long long long long line */\n",
             getLLVMStyleWithColumns(20)));
}

TEST_F(FormatTest, DoNotCrashOnInvalidInput) {
  format("? ) =");
  verifyNoCrash("#define a\\\n /**/}");
}

TEST_F(FormatTest, FormatsTableGenCode) {
  FormatStyle Style = getLLVMStyle();
  Style.Language = FormatStyle::LK_TableGen;
  verifyFormat("include \"a.td\"\ninclude \"b.td\"", Style);
}

TEST_F(FormatTest, ArrayOfTemplates) {
  EXPECT_EQ("auto a = new unique_ptr<int>[10];",
            format("auto a = new unique_ptr<int > [ 10];"));

  FormatStyle Spaces = getLLVMStyle();
  Spaces.SpacesInSquareBrackets = true;
  EXPECT_EQ("auto a = new unique_ptr<int>[ 10 ];",
            format("auto a = new unique_ptr<int > [10];", Spaces));
}

TEST_F(FormatTest, ArrayAsTemplateType) {
  EXPECT_EQ("auto a = unique_ptr<Foo<Bar>[10]>;",
            format("auto a = unique_ptr < Foo < Bar>[ 10]> ;"));

  FormatStyle Spaces = getLLVMStyle();
  Spaces.SpacesInSquareBrackets = true;
  EXPECT_EQ("auto a = unique_ptr<Foo<Bar>[ 10 ]>;",
            format("auto a = unique_ptr < Foo < Bar>[10]> ;", Spaces));
}

TEST(FormatStyle, GetStyleOfFile) {
  vfs::InMemoryFileSystem FS;
  // Test 1: format file in the same directory.
  ASSERT_TRUE(
      FS.addFile("/a/.clang-format", 0,
                 llvm::MemoryBuffer::getMemBuffer("BasedOnStyle: LLVM")));
  ASSERT_TRUE(
      FS.addFile("/a/test.cpp", 0, llvm::MemoryBuffer::getMemBuffer("int i;")));
  auto Style1 = getStyle("file", "/a/.clang-format", "Google", "", &FS);
  ASSERT_TRUE((bool)Style1);
  ASSERT_EQ(*Style1, getLLVMStyle());

  // Test 2.1: fallback to default.
  ASSERT_TRUE(
      FS.addFile("/b/test.cpp", 0, llvm::MemoryBuffer::getMemBuffer("int i;")));
  auto Style2 = getStyle("file", "/b/test.cpp", "Mozilla", "", &FS);
  ASSERT_TRUE((bool)Style2);
  ASSERT_EQ(*Style2, getMozillaStyle());

  // Test 2.2: no format on 'none' fallback style.
  Style2 = getStyle("file", "/b/test.cpp", "none", "", &FS);
  ASSERT_TRUE((bool)Style2);
  ASSERT_EQ(*Style2, getNoStyle());

  // Test 2.3: format if config is found with no based style while fallback is
  // 'none'.
  ASSERT_TRUE(FS.addFile("/b/.clang-format", 0,
                         llvm::MemoryBuffer::getMemBuffer("IndentWidth: 2")));
  Style2 = getStyle("file", "/b/test.cpp", "none", "", &FS);
  ASSERT_TRUE((bool)Style2);
  ASSERT_EQ(*Style2, getLLVMStyle());

  // Test 2.4: format if yaml with no based style, while fallback is 'none'.
  Style2 = getStyle("{}", "a.h", "none", "", &FS);
  ASSERT_TRUE((bool)Style2);
  ASSERT_EQ(*Style2, getLLVMStyle());

  // Test 3: format file in parent directory.
  ASSERT_TRUE(
      FS.addFile("/c/.clang-format", 0,
                 llvm::MemoryBuffer::getMemBuffer("BasedOnStyle: Google")));
  ASSERT_TRUE(FS.addFile("/c/sub/sub/sub/test.cpp", 0,
                         llvm::MemoryBuffer::getMemBuffer("int i;")));
  auto Style3 = getStyle("file", "/c/sub/sub/sub/test.cpp", "LLVM", "", &FS);
  ASSERT_TRUE((bool)Style3);
  ASSERT_EQ(*Style3, getGoogleStyle());

  // Test 4: error on invalid fallback style
  auto Style4 = getStyle("file", "a.h", "KungFu", "", &FS);
  ASSERT_FALSE((bool)Style4);
  llvm::consumeError(Style4.takeError());

  // Test 5: error on invalid yaml on command line
  auto Style5 = getStyle("{invalid_key=invalid_value}", "a.h", "LLVM", "", &FS);
  ASSERT_FALSE((bool)Style5);
  llvm::consumeError(Style5.takeError());

  // Test 6: error on invalid style
  auto Style6 = getStyle("KungFu", "a.h", "LLVM", "", &FS);
  ASSERT_FALSE((bool)Style6);
  llvm::consumeError(Style6.takeError());

  // Test 7: found config file, error on parsing it
  ASSERT_TRUE(
      FS.addFile("/d/.clang-format", 0,
                 llvm::MemoryBuffer::getMemBuffer("BasedOnStyle: LLVM\n"
                                                  "InvalidKey: InvalidValue")));
  ASSERT_TRUE(
      FS.addFile("/d/test.cpp", 0, llvm::MemoryBuffer::getMemBuffer("int i;")));
  auto Style7 = getStyle("file", "/d/.clang-format", "LLVM", "", &FS);
  ASSERT_FALSE((bool)Style7);
  llvm::consumeError(Style7.takeError());
}

TEST_F(ReplacementTest, FormatCodeAfterReplacements) {
  // Column limit is 20.
  std::string Code = "Type *a =\n"
                     "    new Type();\n"
                     "g(iiiii, 0, jjjjj,\n"
                     "  0, kkkkk, 0, mm);\n"
                     "int  bad     = format   ;";
  std::string Expected = "auto a = new Type();\n"
                         "g(iiiii, nullptr,\n"
                         "  jjjjj, nullptr,\n"
                         "  kkkkk, nullptr,\n"
                         "  mm);\n"
                         "int  bad     = format   ;";
  FileID ID = Context.createInMemoryFile("format.cpp", Code);
  tooling::Replacements Replaces = toReplacements(
      {tooling::Replacement(Context.Sources, Context.getLocation(ID, 1, 1), 6,
                            "auto "),
       tooling::Replacement(Context.Sources, Context.getLocation(ID, 3, 10), 1,
                            "nullptr"),
       tooling::Replacement(Context.Sources, Context.getLocation(ID, 4, 3), 1,
                            "nullptr"),
       tooling::Replacement(Context.Sources, Context.getLocation(ID, 4, 13), 1,
                            "nullptr")});

  format::FormatStyle Style = format::getLLVMStyle();
  Style.ColumnLimit = 20; // Set column limit to 20 to increase readibility.
  auto FormattedReplaces = formatReplacements(Code, Replaces, Style);
  EXPECT_TRUE(static_cast<bool>(FormattedReplaces))
      << llvm::toString(FormattedReplaces.takeError()) << "\n";
  auto Result = applyAllReplacements(Code, *FormattedReplaces);
  EXPECT_TRUE(static_cast<bool>(Result));
  EXPECT_EQ(Expected, *Result);
}

TEST_F(ReplacementTest, SortIncludesAfterReplacement) {
  std::string Code = "#include \"a.h\"\n"
                     "#include \"c.h\"\n"
                     "\n"
                     "int main() {\n"
                     "  return 0;\n"
                     "}";
  std::string Expected = "#include \"a.h\"\n"
                         "#include \"b.h\"\n"
                         "#include \"c.h\"\n"
                         "\n"
                         "int main() {\n"
                         "  return 0;\n"
                         "}";
  FileID ID = Context.createInMemoryFile("fix.cpp", Code);
  tooling::Replacements Replaces = toReplacements(
      {tooling::Replacement(Context.Sources, Context.getLocation(ID, 1, 1), 0,
                            "#include \"b.h\"\n")});

  format::FormatStyle Style = format::getLLVMStyle();
  Style.SortIncludes = true;
  auto FormattedReplaces = formatReplacements(Code, Replaces, Style);
  EXPECT_TRUE(static_cast<bool>(FormattedReplaces))
      << llvm::toString(FormattedReplaces.takeError()) << "\n";
  auto Result = applyAllReplacements(Code, *FormattedReplaces);
  EXPECT_TRUE(static_cast<bool>(Result));
  EXPECT_EQ(Expected, *Result);
}

TEST_F(FormatTest, AllignTrailingComments) {
  EXPECT_EQ("#define MACRO(V)                       \\\n"
            "  V(Rt2) /* one more char */           \\\n"
            "  V(Rs)  /* than here  */              \\\n"
            "/* comment 3 */\n",
            format("#define MACRO(V)\\\n"
                   "V(Rt2)  /* one more char */ \\\n"
                   "V(Rs) /* than here  */    \\\n"
                   "/* comment 3 */         \\\n",
                   getLLVMStyleWithColumns(40)));
}
} // end namespace
} // end namespace format
} // end namespace clang