Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 1 | //===--- Format.cpp - Format C++ code -------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | /// |
| 10 | /// \file |
| 11 | /// \brief This file implements functions declared in Format.h. This will be |
| 12 | /// split into separate files as we go. |
| 13 | /// |
| 14 | /// This is EXPERIMENTAL code under heavy development. It is not in a state yet, |
| 15 | /// where it can be used to format real code. |
| 16 | /// |
| 17 | //===----------------------------------------------------------------------===// |
| 18 | |
| 19 | #include "clang/Format/Format.h" |
Chandler Carruth | 55fc873 | 2012-12-04 09:13:33 +0000 | [diff] [blame] | 20 | #include "UnwrappedLineParser.h" |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 21 | #include "clang/Basic/SourceManager.h" |
Daniel Jasper | 675d2e3 | 2012-12-21 10:20:02 +0000 | [diff] [blame] | 22 | #include "clang/Basic/OperatorPrecedence.h" |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 23 | #include "clang/Lex/Lexer.h" |
| 24 | |
Daniel Jasper | 8822d3a | 2012-12-04 13:02:32 +0000 | [diff] [blame] | 25 | #include <string> |
| 26 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 27 | namespace clang { |
| 28 | namespace format { |
| 29 | |
| 30 | // FIXME: Move somewhere sane. |
| 31 | struct TokenAnnotation { |
Daniel Jasper | 33182dd | 2012-12-05 14:57:28 +0000 | [diff] [blame] | 32 | enum TokenType { |
| 33 | TT_Unknown, |
| 34 | TT_TemplateOpener, |
| 35 | TT_TemplateCloser, |
| 36 | TT_BinaryOperator, |
| 37 | TT_UnaryOperator, |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 38 | TT_TrailingUnaryOperator, |
Daniel Jasper | 33182dd | 2012-12-05 14:57:28 +0000 | [diff] [blame] | 39 | TT_OverloadedOperator, |
| 40 | TT_PointerOrReference, |
| 41 | TT_ConditionalExpr, |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 42 | TT_CtorInitializerColon, |
Daniel Jasper | 33182dd | 2012-12-05 14:57:28 +0000 | [diff] [blame] | 43 | TT_LineComment, |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 44 | TT_BlockComment, |
Daniel Jasper | cd1a32b | 2012-12-21 17:58:39 +0000 | [diff] [blame] | 45 | TT_DirectorySeparator, |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 46 | TT_ObjCMethodSpecifier |
Daniel Jasper | 33182dd | 2012-12-05 14:57:28 +0000 | [diff] [blame] | 47 | }; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 48 | |
| 49 | TokenType Type; |
| 50 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 51 | bool SpaceRequiredBefore; |
| 52 | bool CanBreakBefore; |
| 53 | bool MustBreakBefore; |
| 54 | }; |
| 55 | |
Daniel Jasper | cf225b6 | 2012-12-24 13:43:52 +0000 | [diff] [blame] | 56 | static prec::Level getPrecedence(const FormatToken &Tok) { |
| 57 | return getBinOpPrecedence(Tok.Tok.getKind(), true, true); |
| 58 | } |
| 59 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 60 | using llvm::MutableArrayRef; |
| 61 | |
| 62 | FormatStyle getLLVMStyle() { |
| 63 | FormatStyle LLVMStyle; |
| 64 | LLVMStyle.ColumnLimit = 80; |
| 65 | LLVMStyle.MaxEmptyLinesToKeep = 1; |
| 66 | LLVMStyle.PointerAndReferenceBindToType = false; |
| 67 | LLVMStyle.AccessModifierOffset = -2; |
| 68 | LLVMStyle.SplitTemplateClosingGreater = true; |
Alexander Kornienko | 1575731 | 2012-12-06 18:03:27 +0000 | [diff] [blame] | 69 | LLVMStyle.IndentCaseLabels = false; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 70 | return LLVMStyle; |
| 71 | } |
| 72 | |
| 73 | FormatStyle getGoogleStyle() { |
| 74 | FormatStyle GoogleStyle; |
| 75 | GoogleStyle.ColumnLimit = 80; |
| 76 | GoogleStyle.MaxEmptyLinesToKeep = 1; |
| 77 | GoogleStyle.PointerAndReferenceBindToType = true; |
| 78 | GoogleStyle.AccessModifierOffset = -1; |
| 79 | GoogleStyle.SplitTemplateClosingGreater = false; |
Alexander Kornienko | 1575731 | 2012-12-06 18:03:27 +0000 | [diff] [blame] | 80 | GoogleStyle.IndentCaseLabels = true; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 81 | return GoogleStyle; |
| 82 | } |
| 83 | |
| 84 | struct OptimizationParameters { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 85 | unsigned PenaltyIndentLevel; |
Daniel Jasper | a4974cf | 2012-12-24 16:43:00 +0000 | [diff] [blame^] | 86 | unsigned PenaltyLevelDecrease; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 87 | }; |
| 88 | |
| 89 | class UnwrappedLineFormatter { |
| 90 | public: |
| 91 | UnwrappedLineFormatter(const FormatStyle &Style, SourceManager &SourceMgr, |
| 92 | const UnwrappedLine &Line, |
| 93 | const std::vector<TokenAnnotation> &Annotations, |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 94 | tooling::Replacements &Replaces, bool StructuralError) |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 95 | : Style(Style), SourceMgr(SourceMgr), Line(Line), |
| 96 | Annotations(Annotations), Replaces(Replaces), |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 97 | StructuralError(StructuralError) { |
Daniel Jasper | e2c7acf | 2012-12-24 00:13:23 +0000 | [diff] [blame] | 98 | Parameters.PenaltyIndentLevel = 15; |
Daniel Jasper | a4974cf | 2012-12-24 16:43:00 +0000 | [diff] [blame^] | 99 | Parameters.PenaltyLevelDecrease = 10; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 100 | } |
| 101 | |
| 102 | void format() { |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 103 | // Format first token and initialize indent. |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 104 | unsigned Indent = formatFirstToken(); |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 105 | |
| 106 | // Initialize state dependent on indent. |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 107 | IndentState State; |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 108 | State.Column = Indent; |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 109 | State.ConsumedTokens = 0; |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 110 | State.Indent.push_back(Indent + 4); |
| 111 | State.LastSpace.push_back(Indent); |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 112 | State.FirstLessLess.push_back(0); |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 113 | State.ForLoopVariablePos = 0; |
| 114 | State.LineContainsContinuedForLoopSection = false; |
Daniel Jasper | a4974cf | 2012-12-24 16:43:00 +0000 | [diff] [blame^] | 115 | State.StartOfLineLevel = 1; |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 116 | |
| 117 | // The first token has already been indented and thus consumed. |
| 118 | moveStateToNextToken(State); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 119 | |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 120 | // Check whether the UnwrappedLine can be put onto a single line. If so, |
| 121 | // this is bound to be the optimal solution (by definition) and we don't |
| 122 | // need to analyze the entire solution space. |
| 123 | unsigned Columns = State.Column; |
| 124 | bool FitsOnALine = true; |
| 125 | for (unsigned i = 1, n = Line.Tokens.size(); i != n; ++i) { |
| 126 | Columns += (Annotations[i].SpaceRequiredBefore ? 1 : 0) + |
| 127 | Line.Tokens[i].Tok.getLength(); |
| 128 | // A special case for the colon of a constructor initializer as this only |
| 129 | // needs to be put on a new line if the line needs to be split. |
| 130 | if (Columns > Style.ColumnLimit || |
| 131 | (Annotations[i].MustBreakBefore && |
| 132 | Annotations[i].Type != TokenAnnotation::TT_CtorInitializerColon)) { |
| 133 | FitsOnALine = false; |
| 134 | break; |
| 135 | } |
| 136 | } |
| 137 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 138 | // Start iterating at 1 as we have correctly formatted of Token #0 above. |
| 139 | for (unsigned i = 1, n = Line.Tokens.size(); i != n; ++i) { |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 140 | if (FitsOnALine) { |
| 141 | addTokenToState(false, false, State); |
| 142 | } else { |
| 143 | unsigned NoBreak = calcPenalty(State, false, UINT_MAX); |
| 144 | unsigned Break = calcPenalty(State, true, NoBreak); |
| 145 | addTokenToState(Break < NoBreak, false, State); |
| 146 | } |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 147 | } |
| 148 | } |
| 149 | |
| 150 | private: |
| 151 | /// \brief The current state when indenting a unwrapped line. |
| 152 | /// |
| 153 | /// As the indenting tries different combinations this is copied by value. |
| 154 | struct IndentState { |
| 155 | /// \brief The number of used columns in the current line. |
| 156 | unsigned Column; |
| 157 | |
| 158 | /// \brief The number of tokens already consumed. |
| 159 | unsigned ConsumedTokens; |
| 160 | |
Daniel Jasper | a4974cf | 2012-12-24 16:43:00 +0000 | [diff] [blame^] | 161 | /// \brief The parenthesis level of the first token on the current line. |
| 162 | unsigned StartOfLineLevel; |
| 163 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 164 | /// \brief The position to which a specific parenthesis level needs to be |
| 165 | /// indented. |
| 166 | std::vector<unsigned> Indent; |
| 167 | |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 168 | /// \brief The position of the last space on each level. |
| 169 | /// |
| 170 | /// Used e.g. to break like: |
| 171 | /// functionCall(Parameter, otherCall( |
| 172 | /// OtherParameter)); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 173 | std::vector<unsigned> LastSpace; |
| 174 | |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 175 | /// \brief The position the first "<<" operator encountered on each level. |
| 176 | /// |
| 177 | /// Used to align "<<" operators. 0 if no such operator has been encountered |
| 178 | /// on a level. |
| 179 | std::vector<unsigned> FirstLessLess; |
| 180 | |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 181 | /// \brief The column of the first variable in a for-loop declaration. |
| 182 | /// |
| 183 | /// Used to align the second variable if necessary. |
| 184 | unsigned ForLoopVariablePos; |
| 185 | |
| 186 | /// \brief \c true if this line contains a continued for-loop section. |
| 187 | bool LineContainsContinuedForLoopSection; |
| 188 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 189 | /// \brief Comparison operator to be able to used \c IndentState in \c map. |
| 190 | bool operator<(const IndentState &Other) const { |
| 191 | if (Other.ConsumedTokens != ConsumedTokens) |
| 192 | return Other.ConsumedTokens > ConsumedTokens; |
| 193 | if (Other.Column != Column) |
| 194 | return Other.Column > Column; |
Daniel Jasper | a4974cf | 2012-12-24 16:43:00 +0000 | [diff] [blame^] | 195 | if (Other.StartOfLineLevel != StartOfLineLevel) |
| 196 | return Other.StartOfLineLevel > StartOfLineLevel; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 197 | if (Other.Indent.size() != Indent.size()) |
| 198 | return Other.Indent.size() > Indent.size(); |
| 199 | for (int i = 0, e = Indent.size(); i != e; ++i) { |
| 200 | if (Other.Indent[i] != Indent[i]) |
| 201 | return Other.Indent[i] > Indent[i]; |
| 202 | } |
| 203 | if (Other.LastSpace.size() != LastSpace.size()) |
| 204 | return Other.LastSpace.size() > LastSpace.size(); |
| 205 | for (int i = 0, e = LastSpace.size(); i != e; ++i) { |
| 206 | if (Other.LastSpace[i] != LastSpace[i]) |
| 207 | return Other.LastSpace[i] > LastSpace[i]; |
| 208 | } |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 209 | if (Other.FirstLessLess.size() != FirstLessLess.size()) |
| 210 | return Other.FirstLessLess.size() > FirstLessLess.size(); |
| 211 | for (int i = 0, e = FirstLessLess.size(); i != e; ++i) { |
| 212 | if (Other.FirstLessLess[i] != FirstLessLess[i]) |
| 213 | return Other.FirstLessLess[i] > FirstLessLess[i]; |
| 214 | } |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 215 | if (Other.ForLoopVariablePos != ForLoopVariablePos) |
| 216 | return Other.ForLoopVariablePos < ForLoopVariablePos; |
| 217 | if (Other.LineContainsContinuedForLoopSection != |
| 218 | LineContainsContinuedForLoopSection) |
| 219 | return LineContainsContinuedForLoopSection; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 220 | return false; |
| 221 | } |
| 222 | }; |
| 223 | |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 224 | /// \brief Appends the next token to \p State and updates information |
| 225 | /// necessary for indentation. |
| 226 | /// |
| 227 | /// Puts the token on the current line if \p Newline is \c true and adds a |
| 228 | /// line break and necessary indentation otherwise. |
| 229 | /// |
| 230 | /// If \p DryRun is \c false, also creates and stores the required |
| 231 | /// \c Replacement. |
| 232 | void addTokenToState(bool Newline, bool DryRun, IndentState &State) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 233 | unsigned Index = State.ConsumedTokens; |
| 234 | const FormatToken &Current = Line.Tokens[Index]; |
| 235 | const FormatToken &Previous = Line.Tokens[Index - 1]; |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 236 | unsigned ParenLevel = State.Indent.size() - 1; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 237 | |
| 238 | if (Newline) { |
| 239 | if (Current.Tok.is(tok::string_literal) && |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 240 | Previous.Tok.is(tok::string_literal)) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 241 | State.Column = State.Column - Previous.Tok.getLength(); |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 242 | } else if (Current.Tok.is(tok::lessless) && |
| 243 | State.FirstLessLess[ParenLevel] != 0) { |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 244 | State.Column = State.FirstLessLess[ParenLevel]; |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 245 | } else if (ParenLevel != 0 && |
| 246 | (Previous.Tok.is(tok::equal) || Current.Tok.is(tok::arrow) || |
| 247 | Current.Tok.is(tok::period))) { |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 248 | // Indent and extra 4 spaces after '=' as it continues an expression. |
| 249 | // Don't do that on the top level, as we already indent 4 there. |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 250 | State.Column = State.Indent[ParenLevel] + 4; |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 251 | } else if (Line.Tokens[0].Tok.is(tok::kw_for) && |
| 252 | Previous.Tok.is(tok::comma)) { |
| 253 | State.Column = State.ForLoopVariablePos; |
| 254 | } else { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 255 | State.Column = State.Indent[ParenLevel]; |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 256 | } |
| 257 | |
Daniel Jasper | a4974cf | 2012-12-24 16:43:00 +0000 | [diff] [blame^] | 258 | State.StartOfLineLevel = ParenLevel + 1; |
| 259 | |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 260 | if (Line.Tokens[0].Tok.is(tok::kw_for)) |
| 261 | State.LineContainsContinuedForLoopSection = |
| 262 | Previous.Tok.isNot(tok::semi); |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 263 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 264 | if (!DryRun) |
| 265 | replaceWhitespace(Current, 1, State.Column); |
| 266 | |
Daniel Jasper | a88bb45 | 2012-12-04 10:50:12 +0000 | [diff] [blame] | 267 | State.LastSpace[ParenLevel] = State.Indent[ParenLevel]; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 268 | if (Current.Tok.is(tok::colon) && |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 269 | Annotations[Index].Type != TokenAnnotation::TT_ConditionalExpr && |
| 270 | Annotations[0].Type != TokenAnnotation::TT_ObjCMethodSpecifier) |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 271 | State.Indent[ParenLevel] += 2; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 272 | } else { |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 273 | if (Current.Tok.is(tok::equal) && Line.Tokens[0].Tok.is(tok::kw_for)) |
| 274 | State.ForLoopVariablePos = State.Column - Previous.Tok.getLength(); |
| 275 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 276 | unsigned Spaces = Annotations[Index].SpaceRequiredBefore ? 1 : 0; |
| 277 | if (Annotations[Index].Type == TokenAnnotation::TT_LineComment) |
| 278 | Spaces = 2; |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 279 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 280 | if (!DryRun) |
| 281 | replaceWhitespace(Current, 0, Spaces); |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 282 | |
Daniel Jasper | cf225b6 | 2012-12-24 13:43:52 +0000 | [diff] [blame] | 283 | // FIXME: Look into using this alignment at other ParenLevels. |
| 284 | if (ParenLevel == 0 && (getPrecedence(Previous) == prec::Assignment || |
| 285 | Previous.Tok.is(tok::kw_return))) |
| 286 | State.Indent[ParenLevel] = State.Column + Spaces; |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 287 | if (Previous.Tok.is(tok::l_paren) || |
| 288 | Annotations[Index - 1].Type == TokenAnnotation::TT_TemplateOpener) |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 289 | State.Indent[ParenLevel] = State.Column; |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 290 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 291 | // Top-level spaces are exempt as that mostly leads to better results. |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 292 | State.Column += Spaces; |
Daniel Jasper | a88bb45 | 2012-12-04 10:50:12 +0000 | [diff] [blame] | 293 | if (Spaces > 0 && ParenLevel != 0) |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 294 | State.LastSpace[ParenLevel] = State.Column; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 295 | } |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 296 | moveStateToNextToken(State); |
| 297 | } |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 298 | |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 299 | /// \brief Mark the next token as consumed in \p State and modify its stacks |
| 300 | /// accordingly. |
| 301 | void moveStateToNextToken(IndentState &State) { |
| 302 | unsigned Index = State.ConsumedTokens; |
| 303 | const FormatToken &Current = Line.Tokens[Index]; |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 304 | unsigned ParenLevel = State.Indent.size() - 1; |
| 305 | |
| 306 | if (Current.Tok.is(tok::lessless) && State.FirstLessLess[ParenLevel] == 0) |
| 307 | State.FirstLessLess[ParenLevel] = State.Column; |
| 308 | |
| 309 | State.Column += Current.Tok.getLength(); |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 310 | |
Daniel Jasper | cf225b6 | 2012-12-24 13:43:52 +0000 | [diff] [blame] | 311 | // If we encounter an opening (, [, { or <, we add a level to our stacks to |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 312 | // prepare for the following tokens. |
| 313 | if (Current.Tok.is(tok::l_paren) || Current.Tok.is(tok::l_square) || |
Daniel Jasper | cf225b6 | 2012-12-24 13:43:52 +0000 | [diff] [blame] | 314 | Current.Tok.is(tok::l_brace) || |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 315 | Annotations[Index].Type == TokenAnnotation::TT_TemplateOpener) { |
| 316 | State.Indent.push_back(4 + State.LastSpace.back()); |
| 317 | State.LastSpace.push_back(State.LastSpace.back()); |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 318 | State.FirstLessLess.push_back(0); |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 319 | } |
| 320 | |
Daniel Jasper | cf225b6 | 2012-12-24 13:43:52 +0000 | [diff] [blame] | 321 | // If we encounter a closing ), ], } or >, we can remove a level from our |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 322 | // stacks. |
Daniel Jasper | a88bb45 | 2012-12-04 10:50:12 +0000 | [diff] [blame] | 323 | if (Current.Tok.is(tok::r_paren) || Current.Tok.is(tok::r_square) || |
Daniel Jasper | cf225b6 | 2012-12-24 13:43:52 +0000 | [diff] [blame] | 324 | (Current.Tok.is(tok::r_brace) && State.ConsumedTokens > 0) || |
Daniel Jasper | a88bb45 | 2012-12-04 10:50:12 +0000 | [diff] [blame] | 325 | Annotations[Index].Type == TokenAnnotation::TT_TemplateCloser) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 326 | State.Indent.pop_back(); |
| 327 | State.LastSpace.pop_back(); |
Daniel Jasper | 3b5943f | 2012-12-06 09:56:08 +0000 | [diff] [blame] | 328 | State.FirstLessLess.pop_back(); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 329 | } |
| 330 | |
| 331 | ++State.ConsumedTokens; |
| 332 | } |
| 333 | |
Daniel Jasper | 9a0b494 | 2012-12-17 14:34:14 +0000 | [diff] [blame] | 334 | /// \brief Calculate the panelty for splitting after the token at \p Index. |
| 335 | unsigned splitPenalty(unsigned Index) { |
| 336 | assert(Index < Line.Tokens.size() && |
| 337 | "Tried to calculate penalty for splitting after the last token"); |
| 338 | const FormatToken &Left = Line.Tokens[Index]; |
| 339 | const FormatToken &Right = Line.Tokens[Index + 1]; |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 340 | |
| 341 | // In for-loops, prefer breaking at ',' and ';'. |
| 342 | if (Line.Tokens[0].Tok.is(tok::kw_for) && |
| 343 | (Left.Tok.isNot(tok::comma) && Left.Tok.isNot(tok::semi))) |
| 344 | return 20; |
| 345 | |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 346 | if (Left.Tok.is(tok::semi) || Left.Tok.is(tok::comma)) |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 347 | return 0; |
Daniel Jasper | e2c7acf | 2012-12-24 00:13:23 +0000 | [diff] [blame] | 348 | if (Left.Tok.is(tok::l_paren)) |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 349 | return 2; |
Daniel Jasper | 9a0b494 | 2012-12-17 14:34:14 +0000 | [diff] [blame] | 350 | |
Daniel Jasper | cf225b6 | 2012-12-24 13:43:52 +0000 | [diff] [blame] | 351 | prec::Level Level = getPrecedence(Line.Tokens[Index]); |
Daniel Jasper | e2c7acf | 2012-12-24 00:13:23 +0000 | [diff] [blame] | 352 | if (Level != prec::Unknown) |
| 353 | return Level; |
| 354 | |
Daniel Jasper | 9a0b494 | 2012-12-17 14:34:14 +0000 | [diff] [blame] | 355 | if (Right.Tok.is(tok::arrow) || Right.Tok.is(tok::period)) |
Daniel Jasper | a4974cf | 2012-12-24 16:43:00 +0000 | [diff] [blame^] | 356 | return 50; |
Daniel Jasper | 9a0b494 | 2012-12-17 14:34:14 +0000 | [diff] [blame] | 357 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 358 | return 3; |
| 359 | } |
| 360 | |
| 361 | /// \brief Calculate the number of lines needed to format the remaining part |
| 362 | /// of the unwrapped line. |
| 363 | /// |
| 364 | /// Assumes the formatting so far has led to |
| 365 | /// the \c IndentState \p State. If \p NewLine is set, a new line will be |
| 366 | /// added after the previous token. |
| 367 | /// |
| 368 | /// \param StopAt is used for optimization. If we can determine that we'll |
| 369 | /// definitely need at least \p StopAt additional lines, we already know of a |
| 370 | /// better solution. |
| 371 | unsigned calcPenalty(IndentState State, bool NewLine, unsigned StopAt) { |
| 372 | // We are at the end of the unwrapped line, so we don't need any more lines. |
| 373 | if (State.ConsumedTokens >= Line.Tokens.size()) |
| 374 | return 0; |
| 375 | |
| 376 | if (!NewLine && Annotations[State.ConsumedTokens].MustBreakBefore) |
| 377 | return UINT_MAX; |
| 378 | if (NewLine && !Annotations[State.ConsumedTokens].CanBreakBefore) |
| 379 | return UINT_MAX; |
Daniel Jasper | a324a0e | 2012-12-21 14:37:20 +0000 | [diff] [blame] | 380 | if (!NewLine && Line.Tokens[State.ConsumedTokens - 1].Tok.is(tok::semi) && |
| 381 | State.LineContainsContinuedForLoopSection) |
| 382 | return UINT_MAX; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 383 | |
Daniel Jasper | 33182dd | 2012-12-05 14:57:28 +0000 | [diff] [blame] | 384 | unsigned CurrentPenalty = 0; |
| 385 | if (NewLine) { |
| 386 | CurrentPenalty += Parameters.PenaltyIndentLevel * State.Indent.size() + |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 387 | splitPenalty(State.ConsumedTokens - 1); |
Daniel Jasper | a4974cf | 2012-12-24 16:43:00 +0000 | [diff] [blame^] | 388 | } else { |
| 389 | if (State.Indent.size() < State.StartOfLineLevel) |
| 390 | CurrentPenalty += Parameters.PenaltyLevelDecrease * |
| 391 | (State.StartOfLineLevel - State.Indent.size()); |
Daniel Jasper | 33182dd | 2012-12-05 14:57:28 +0000 | [diff] [blame] | 392 | } |
| 393 | |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 394 | addTokenToState(NewLine, true, State); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 395 | |
| 396 | // Exceeding column limit is bad. |
| 397 | if (State.Column > Style.ColumnLimit) |
| 398 | return UINT_MAX; |
| 399 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 400 | if (StopAt <= CurrentPenalty) |
| 401 | return UINT_MAX; |
| 402 | StopAt -= CurrentPenalty; |
| 403 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 404 | StateMap::iterator I = Memory.find(State); |
Daniel Jasper | 33182dd | 2012-12-05 14:57:28 +0000 | [diff] [blame] | 405 | if (I != Memory.end()) { |
| 406 | // If this state has already been examined, we can safely return the |
| 407 | // previous result if we |
| 408 | // - have not hit the optimatization (and thus returned UINT_MAX) OR |
| 409 | // - are now computing for a smaller or equal StopAt. |
| 410 | unsigned SavedResult = I->second.first; |
| 411 | unsigned SavedStopAt = I->second.second; |
Daniel Jasper | 9a0b494 | 2012-12-17 14:34:14 +0000 | [diff] [blame] | 412 | if (SavedResult != UINT_MAX) |
| 413 | return SavedResult + CurrentPenalty; |
| 414 | else if (StopAt <= SavedStopAt) |
| 415 | return UINT_MAX; |
Daniel Jasper | 33182dd | 2012-12-05 14:57:28 +0000 | [diff] [blame] | 416 | } |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 417 | |
| 418 | unsigned NoBreak = calcPenalty(State, false, StopAt); |
| 419 | unsigned WithBreak = calcPenalty(State, true, std::min(StopAt, NoBreak)); |
| 420 | unsigned Result = std::min(NoBreak, WithBreak); |
Daniel Jasper | 9a0b494 | 2012-12-17 14:34:14 +0000 | [diff] [blame] | 421 | |
| 422 | // We have to store 'Result' without adding 'CurrentPenalty' as the latter |
| 423 | // can depend on 'NewLine'. |
Daniel Jasper | 33182dd | 2012-12-05 14:57:28 +0000 | [diff] [blame] | 424 | Memory[State] = std::pair<unsigned, unsigned>(Result, StopAt); |
Daniel Jasper | 9a0b494 | 2012-12-17 14:34:14 +0000 | [diff] [blame] | 425 | |
| 426 | return Result == UINT_MAX ? UINT_MAX : Result + CurrentPenalty; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 427 | } |
| 428 | |
| 429 | /// \brief Replaces the whitespace in front of \p Tok. Only call once for |
| 430 | /// each \c FormatToken. |
| 431 | void replaceWhitespace(const FormatToken &Tok, unsigned NewLines, |
| 432 | unsigned Spaces) { |
| 433 | Replaces.insert(tooling::Replacement( |
| 434 | SourceMgr, Tok.WhiteSpaceStart, Tok.WhiteSpaceLength, |
| 435 | std::string(NewLines, '\n') + std::string(Spaces, ' '))); |
| 436 | } |
| 437 | |
| 438 | /// \brief Add a new line and the required indent before the first Token |
Alexander Kornienko | 720ffb6 | 2012-12-05 13:56:52 +0000 | [diff] [blame] | 439 | /// of the \c UnwrappedLine if there was no structural parsing error. |
| 440 | /// Returns the indent level of the \c UnwrappedLine. |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 441 | unsigned formatFirstToken() { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 442 | const FormatToken &Token = Line.Tokens[0]; |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 443 | if (!Token.WhiteSpaceStart.isValid() || StructuralError) |
| 444 | return SourceMgr.getSpellingColumnNumber(Token.Tok.getLocation()) - 1; |
| 445 | |
| 446 | unsigned Newlines = |
| 447 | std::min(Token.NewlinesBefore, Style.MaxEmptyLinesToKeep + 1); |
| 448 | unsigned Offset = SourceMgr.getFileOffset(Token.WhiteSpaceStart); |
| 449 | if (Newlines == 0 && Offset != 0) |
| 450 | Newlines = 1; |
| 451 | unsigned Indent = Line.Level * 2; |
Alexander Kornienko | 56e49c5 | 2012-12-10 16:34:48 +0000 | [diff] [blame] | 452 | if ((Token.Tok.is(tok::kw_public) || Token.Tok.is(tok::kw_protected) || |
| 453 | Token.Tok.is(tok::kw_private)) && |
| 454 | static_cast<int>(Indent) + Style.AccessModifierOffset >= 0) |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 455 | Indent += Style.AccessModifierOffset; |
| 456 | replaceWhitespace(Token, Newlines, Indent); |
| 457 | return Indent; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 458 | } |
| 459 | |
| 460 | FormatStyle Style; |
| 461 | SourceManager &SourceMgr; |
| 462 | const UnwrappedLine &Line; |
| 463 | const std::vector<TokenAnnotation> &Annotations; |
| 464 | tooling::Replacements &Replaces; |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 465 | bool StructuralError; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 466 | |
Daniel Jasper | 33182dd | 2012-12-05 14:57:28 +0000 | [diff] [blame] | 467 | // A map from an indent state to a pair (Result, Used-StopAt). |
| 468 | typedef std::map<IndentState, std::pair<unsigned, unsigned> > StateMap; |
| 469 | StateMap Memory; |
| 470 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 471 | OptimizationParameters Parameters; |
| 472 | }; |
| 473 | |
| 474 | /// \brief Determines extra information about the tokens comprising an |
| 475 | /// \c UnwrappedLine. |
| 476 | class TokenAnnotator { |
| 477 | public: |
| 478 | TokenAnnotator(const UnwrappedLine &Line, const FormatStyle &Style, |
| 479 | SourceManager &SourceMgr) |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 480 | : Line(Line), Style(Style), SourceMgr(SourceMgr) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 481 | } |
| 482 | |
| 483 | /// \brief A parser that gathers additional information about tokens. |
| 484 | /// |
| 485 | /// The \c TokenAnnotator tries to matches parenthesis and square brakets and |
| 486 | /// store a parenthesis levels. It also tries to resolve matching "<" and ">" |
| 487 | /// into template parameter lists. |
| 488 | class AnnotatingParser { |
| 489 | public: |
Manuel Klimek | 0be4b36 | 2012-12-03 20:55:42 +0000 | [diff] [blame] | 490 | AnnotatingParser(const SmallVector<FormatToken, 16> &Tokens, |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 491 | std::vector<TokenAnnotation> &Annotations) |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 492 | : Tokens(Tokens), Annotations(Annotations), Index(0) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 493 | } |
| 494 | |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 495 | bool parseAngle() { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 496 | while (Index < Tokens.size()) { |
| 497 | if (Tokens[Index].Tok.is(tok::greater)) { |
Daniel Jasper | a88bb45 | 2012-12-04 10:50:12 +0000 | [diff] [blame] | 498 | Annotations[Index].Type = TokenAnnotation::TT_TemplateCloser; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 499 | next(); |
| 500 | return true; |
| 501 | } |
| 502 | if (Tokens[Index].Tok.is(tok::r_paren) || |
| 503 | Tokens[Index].Tok.is(tok::r_square)) |
| 504 | return false; |
| 505 | if (Tokens[Index].Tok.is(tok::pipepipe) || |
| 506 | Tokens[Index].Tok.is(tok::ampamp) || |
| 507 | Tokens[Index].Tok.is(tok::question) || |
| 508 | Tokens[Index].Tok.is(tok::colon)) |
| 509 | return false; |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 510 | consumeToken(); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 511 | } |
| 512 | return false; |
| 513 | } |
| 514 | |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 515 | bool parseParens() { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 516 | while (Index < Tokens.size()) { |
| 517 | if (Tokens[Index].Tok.is(tok::r_paren)) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 518 | next(); |
| 519 | return true; |
| 520 | } |
| 521 | if (Tokens[Index].Tok.is(tok::r_square)) |
| 522 | return false; |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 523 | consumeToken(); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 524 | } |
| 525 | return false; |
| 526 | } |
| 527 | |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 528 | bool parseSquare() { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 529 | while (Index < Tokens.size()) { |
| 530 | if (Tokens[Index].Tok.is(tok::r_square)) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 531 | next(); |
| 532 | return true; |
| 533 | } |
| 534 | if (Tokens[Index].Tok.is(tok::r_paren)) |
| 535 | return false; |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 536 | consumeToken(); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 537 | } |
| 538 | return false; |
| 539 | } |
| 540 | |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 541 | bool parseConditional() { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 542 | while (Index < Tokens.size()) { |
| 543 | if (Tokens[Index].Tok.is(tok::colon)) { |
| 544 | Annotations[Index].Type = TokenAnnotation::TT_ConditionalExpr; |
| 545 | next(); |
| 546 | return true; |
| 547 | } |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 548 | consumeToken(); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 549 | } |
| 550 | return false; |
| 551 | } |
| 552 | |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 553 | void consumeToken() { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 554 | unsigned CurrentIndex = Index; |
| 555 | next(); |
| 556 | switch (Tokens[CurrentIndex].Tok.getKind()) { |
| 557 | case tok::l_paren: |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 558 | parseParens(); |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 559 | if (Index < Tokens.size() && Tokens[Index].Tok.is(tok::colon)) { |
| 560 | Annotations[Index].Type = TokenAnnotation::TT_CtorInitializerColon; |
| 561 | next(); |
| 562 | } |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 563 | break; |
| 564 | case tok::l_square: |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 565 | parseSquare(); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 566 | break; |
| 567 | case tok::less: |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 568 | if (parseAngle()) |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 569 | Annotations[CurrentIndex].Type = TokenAnnotation::TT_TemplateOpener; |
| 570 | else { |
| 571 | Annotations[CurrentIndex].Type = TokenAnnotation::TT_BinaryOperator; |
| 572 | Index = CurrentIndex + 1; |
| 573 | } |
| 574 | break; |
| 575 | case tok::greater: |
| 576 | Annotations[CurrentIndex].Type = TokenAnnotation::TT_BinaryOperator; |
| 577 | break; |
| 578 | case tok::kw_operator: |
Daniel Jasper | f6aef6a | 2012-12-24 10:56:04 +0000 | [diff] [blame] | 579 | if (Tokens[Index].Tok.is(tok::l_paren)) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 580 | Annotations[Index].Type = TokenAnnotation::TT_OverloadedOperator; |
Daniel Jasper | f6aef6a | 2012-12-24 10:56:04 +0000 | [diff] [blame] | 581 | next(); |
| 582 | if (Index < Tokens.size() && Tokens[Index].Tok.is(tok::r_paren)) { |
| 583 | Annotations[Index].Type = TokenAnnotation::TT_OverloadedOperator; |
| 584 | next(); |
| 585 | } |
| 586 | } else { |
| 587 | while (Index < Tokens.size() && !Tokens[Index].Tok.is(tok::l_paren)) { |
| 588 | Annotations[Index].Type = TokenAnnotation::TT_OverloadedOperator; |
| 589 | next(); |
| 590 | } |
| 591 | } |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 592 | break; |
| 593 | case tok::question: |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 594 | parseConditional(); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 595 | break; |
| 596 | default: |
| 597 | break; |
| 598 | } |
| 599 | } |
| 600 | |
Daniel Jasper | cd1a32b | 2012-12-21 17:58:39 +0000 | [diff] [blame] | 601 | void parseIncludeDirective() { |
| 602 | while (Index < Tokens.size()) { |
| 603 | if (Tokens[Index].Tok.is(tok::slash)) |
| 604 | Annotations[Index].Type = TokenAnnotation::TT_DirectorySeparator; |
| 605 | else if (Tokens[Index].Tok.is(tok::less)) |
| 606 | Annotations[Index].Type = TokenAnnotation::TT_TemplateOpener; |
| 607 | else if (Tokens[Index].Tok.is(tok::greater)) |
| 608 | Annotations[Index].Type = TokenAnnotation::TT_TemplateCloser; |
| 609 | next(); |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | void parsePreprocessorDirective() { |
| 614 | next(); |
| 615 | if (Index >= Tokens.size()) |
| 616 | return; |
| 617 | switch (Tokens[Index].Tok.getIdentifierInfo()->getPPKeywordID()) { |
| 618 | case tok::pp_include: |
Nico Weber | b23ae0c | 2012-12-21 18:21:56 +0000 | [diff] [blame] | 619 | case tok::pp_import: |
Daniel Jasper | cd1a32b | 2012-12-21 17:58:39 +0000 | [diff] [blame] | 620 | parseIncludeDirective(); |
| 621 | break; |
| 622 | default: |
| 623 | break; |
| 624 | } |
| 625 | } |
| 626 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 627 | void parseLine() { |
Daniel Jasper | cd1a32b | 2012-12-21 17:58:39 +0000 | [diff] [blame] | 628 | if (Tokens[Index].Tok.is(tok::hash)) { |
| 629 | parsePreprocessorDirective(); |
| 630 | return; |
| 631 | } |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 632 | while (Index < Tokens.size()) { |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 633 | consumeToken(); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 634 | } |
| 635 | } |
| 636 | |
| 637 | void next() { |
| 638 | ++Index; |
| 639 | } |
| 640 | |
| 641 | private: |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 642 | const SmallVector<FormatToken, 16> &Tokens; |
| 643 | std::vector<TokenAnnotation> &Annotations; |
| 644 | unsigned Index; |
| 645 | }; |
| 646 | |
| 647 | void annotate() { |
| 648 | Annotations.clear(); |
| 649 | for (int i = 0, e = Line.Tokens.size(); i != e; ++i) { |
| 650 | Annotations.push_back(TokenAnnotation()); |
| 651 | } |
| 652 | |
Manuel Klimek | 0be4b36 | 2012-12-03 20:55:42 +0000 | [diff] [blame] | 653 | AnnotatingParser Parser(Line.Tokens, Annotations); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 654 | Parser.parseLine(); |
| 655 | |
| 656 | determineTokenTypes(); |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 657 | bool IsObjCMethodDecl = |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 658 | (Line.Tokens.size() > 0 && |
| 659 | (Annotations[0].Type == TokenAnnotation::TT_ObjCMethodSpecifier)); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 660 | for (int i = 1, e = Line.Tokens.size(); i != e; ++i) { |
| 661 | TokenAnnotation &Annotation = Annotations[i]; |
| 662 | |
| 663 | Annotation.CanBreakBefore = |
| 664 | canBreakBetween(Line.Tokens[i - 1], Line.Tokens[i]); |
| 665 | |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 666 | if (Annotation.Type == TokenAnnotation::TT_CtorInitializerColon) { |
| 667 | Annotation.MustBreakBefore = true; |
| 668 | Annotation.SpaceRequiredBefore = true; |
Daniel Jasper | f6aef6a | 2012-12-24 10:56:04 +0000 | [diff] [blame] | 669 | } else if (Annotation.Type == TokenAnnotation::TT_OverloadedOperator) { |
| 670 | Annotation.SpaceRequiredBefore = |
| 671 | Line.Tokens[i].Tok.is(tok::identifier) || Line.Tokens[i].Tok.is( |
| 672 | tok::kw_new) || Line.Tokens[i].Tok.is(tok::kw_delete); |
| 673 | } else if ( |
| 674 | Annotations[i - 1].Type == TokenAnnotation::TT_OverloadedOperator) { |
| 675 | Annotation.SpaceRequiredBefore = false; |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 676 | } else if (IsObjCMethodDecl && Line.Tokens[i].Tok.is(tok::identifier) && |
| 677 | (i != e - 1) && Line.Tokens[i + 1].Tok.is(tok::colon) && |
| 678 | Line.Tokens[i - 1].Tok.is(tok::identifier)) { |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 679 | Annotation.CanBreakBefore = true; |
| 680 | Annotation.SpaceRequiredBefore = true; |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 681 | } else if (IsObjCMethodDecl && Line.Tokens[i].Tok.is(tok::identifier) && |
| 682 | Line.Tokens[i - 1].Tok.is(tok::l_paren) && |
| 683 | Line.Tokens[i - 2].Tok.is(tok::colon)) { |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 684 | // Don't break this identifier as ':' or identifier |
| 685 | // before it will break. |
| 686 | Annotation.CanBreakBefore = false; |
| 687 | } else if (Line.Tokens[i].Tok.is(tok::at) && |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 688 | Line.Tokens[i - 2].Tok.is(tok::at)) { |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 689 | // Don't put two objc's '@' on the same line. This could happen, |
Fariborz Jahanian | 5f04ef5 | 2012-12-21 17:14:23 +0000 | [diff] [blame] | 690 | // as in, @optional @property ... |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 691 | Annotation.MustBreakBefore = true; |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 692 | } else if (Line.Tokens[i].Tok.is(tok::colon)) { |
Daniel Jasper | dfbb319 | 2012-12-05 16:24:48 +0000 | [diff] [blame] | 693 | Annotation.SpaceRequiredBefore = |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 694 | Line.Tokens[0].Tok.isNot(tok::kw_case) && !IsObjCMethodDecl && |
| 695 | (i != e - 1); |
| 696 | // Don't break at ':' if identifier before it can beak. |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 697 | if (IsObjCMethodDecl && Line.Tokens[i - 1].Tok.is(tok::identifier) && |
| 698 | Annotations[i - 1].CanBreakBefore) |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 699 | Annotation.CanBreakBefore = false; |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 700 | } else if ( |
| 701 | Annotations[i - 1].Type == TokenAnnotation::TT_ObjCMethodSpecifier) { |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 702 | Annotation.SpaceRequiredBefore = true; |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 703 | } else if (Annotations[i - 1].Type == TokenAnnotation::TT_UnaryOperator) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 704 | Annotation.SpaceRequiredBefore = false; |
| 705 | } else if (Annotation.Type == TokenAnnotation::TT_UnaryOperator) { |
| 706 | Annotation.SpaceRequiredBefore = |
Daniel Jasper | 8822d3a | 2012-12-04 13:02:32 +0000 | [diff] [blame] | 707 | Line.Tokens[i - 1].Tok.isNot(tok::l_paren) && |
| 708 | Line.Tokens[i - 1].Tok.isNot(tok::l_square); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 709 | } else if (Line.Tokens[i - 1].Tok.is(tok::greater) && |
| 710 | Line.Tokens[i].Tok.is(tok::greater)) { |
Daniel Jasper | 8822d3a | 2012-12-04 13:02:32 +0000 | [diff] [blame] | 711 | if (Annotation.Type == TokenAnnotation::TT_TemplateCloser && |
Daniel Jasper | 2040915 | 2012-12-04 14:54:30 +0000 | [diff] [blame] | 712 | Annotations[i - 1].Type == TokenAnnotation::TT_TemplateCloser) |
Daniel Jasper | a88bb45 | 2012-12-04 10:50:12 +0000 | [diff] [blame] | 713 | Annotation.SpaceRequiredBefore = Style.SplitTemplateClosingGreater; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 714 | else |
| 715 | Annotation.SpaceRequiredBefore = false; |
| 716 | } else if ( |
Daniel Jasper | cd1a32b | 2012-12-21 17:58:39 +0000 | [diff] [blame] | 717 | Annotation.Type == TokenAnnotation::TT_DirectorySeparator || |
| 718 | Annotations[i - 1].Type == TokenAnnotation::TT_DirectorySeparator) { |
| 719 | Annotation.SpaceRequiredBefore = false; |
| 720 | } else if ( |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 721 | Annotation.Type == TokenAnnotation::TT_BinaryOperator || |
| 722 | Annotations[i - 1].Type == TokenAnnotation::TT_BinaryOperator) { |
| 723 | Annotation.SpaceRequiredBefore = true; |
| 724 | } else if ( |
Daniel Jasper | a88bb45 | 2012-12-04 10:50:12 +0000 | [diff] [blame] | 725 | Annotations[i - 1].Type == TokenAnnotation::TT_TemplateCloser && |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 726 | Line.Tokens[i].Tok.is(tok::l_paren)) { |
| 727 | Annotation.SpaceRequiredBefore = false; |
Daniel Jasper | 8822d3a | 2012-12-04 13:02:32 +0000 | [diff] [blame] | 728 | } else if (Line.Tokens[i].Tok.is(tok::less) && |
| 729 | Line.Tokens[0].Tok.is(tok::hash)) { |
| 730 | Annotation.SpaceRequiredBefore = true; |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 731 | } else if (IsObjCMethodDecl && Line.Tokens[i - 1].Tok.is(tok::r_paren) && |
| 732 | Line.Tokens[i].Tok.is(tok::identifier)) { |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 733 | // Don't space between ')' and <id> |
| 734 | Annotation.SpaceRequiredBefore = false; |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 735 | } else if (IsObjCMethodDecl && Line.Tokens[i - 1].Tok.is(tok::colon) && |
| 736 | Line.Tokens[i].Tok.is(tok::l_paren)) { |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 737 | // Don't space between ':' and '(' |
| 738 | Annotation.SpaceRequiredBefore = false; |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 739 | } else if (Annotation.Type == TokenAnnotation::TT_TrailingUnaryOperator) { |
| 740 | Annotation.SpaceRequiredBefore = false; |
| 741 | } else { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 742 | Annotation.SpaceRequiredBefore = |
| 743 | spaceRequiredBetween(Line.Tokens[i - 1].Tok, Line.Tokens[i].Tok); |
| 744 | } |
| 745 | |
| 746 | if (Annotations[i - 1].Type == TokenAnnotation::TT_LineComment || |
| 747 | (Line.Tokens[i].Tok.is(tok::string_literal) && |
| 748 | Line.Tokens[i - 1].Tok.is(tok::string_literal))) { |
| 749 | Annotation.MustBreakBefore = true; |
| 750 | } |
| 751 | |
| 752 | if (Annotation.MustBreakBefore) |
| 753 | Annotation.CanBreakBefore = true; |
| 754 | } |
| 755 | } |
| 756 | |
| 757 | const std::vector<TokenAnnotation> &getAnnotations() { |
| 758 | return Annotations; |
| 759 | } |
| 760 | |
| 761 | private: |
| 762 | void determineTokenTypes() { |
Nico Weber | 00d5a04 | 2012-12-23 01:07:46 +0000 | [diff] [blame] | 763 | bool IsRHS = false; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 764 | for (int i = 0, e = Line.Tokens.size(); i != e; ++i) { |
| 765 | TokenAnnotation &Annotation = Annotations[i]; |
| 766 | const FormatToken &Tok = Line.Tokens[i]; |
| 767 | |
Daniel Jasper | cf225b6 | 2012-12-24 13:43:52 +0000 | [diff] [blame] | 768 | if (getPrecedence(Tok) == prec::Assignment) |
Nico Weber | 00d5a04 | 2012-12-23 01:07:46 +0000 | [diff] [blame] | 769 | IsRHS = true; |
| 770 | else if (Tok.Tok.is(tok::kw_return)) |
| 771 | IsRHS = true; |
Daniel Jasper | 112fb27 | 2012-12-05 07:51:39 +0000 | [diff] [blame] | 772 | |
Daniel Jasper | 675d2e3 | 2012-12-21 10:20:02 +0000 | [diff] [blame] | 773 | if (Annotation.Type != TokenAnnotation::TT_Unknown) |
| 774 | continue; |
| 775 | |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 776 | if (Tok.Tok.is(tok::star) || Tok.Tok.is(tok::amp)) { |
Nico Weber | 00d5a04 | 2012-12-23 01:07:46 +0000 | [diff] [blame] | 777 | Annotation.Type = determineStarAmpUsage(i, IsRHS); |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 778 | } else if (Tok.Tok.is(tok::minus) || Tok.Tok.is(tok::plus)) { |
| 779 | Annotation.Type = determinePlusMinusUsage(i); |
| 780 | } else if (Tok.Tok.is(tok::minusminus) || Tok.Tok.is(tok::plusplus)) { |
| 781 | Annotation.Type = determineIncrementUsage(i); |
| 782 | } else if (Tok.Tok.is(tok::exclaim)) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 783 | Annotation.Type = TokenAnnotation::TT_UnaryOperator; |
Daniel Jasper | 675d2e3 | 2012-12-21 10:20:02 +0000 | [diff] [blame] | 784 | } else if (isBinaryOperator(Line.Tokens[i])) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 785 | Annotation.Type = TokenAnnotation::TT_BinaryOperator; |
Daniel Jasper | 675d2e3 | 2012-12-21 10:20:02 +0000 | [diff] [blame] | 786 | } else if (Tok.Tok.is(tok::comment)) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 787 | StringRef Data(SourceMgr.getCharacterData(Tok.Tok.getLocation()), |
| 788 | Tok.Tok.getLength()); |
| 789 | if (Data.startswith("//")) |
| 790 | Annotation.Type = TokenAnnotation::TT_LineComment; |
| 791 | else |
| 792 | Annotation.Type = TokenAnnotation::TT_BlockComment; |
| 793 | } |
| 794 | } |
| 795 | } |
| 796 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 797 | bool isBinaryOperator(const FormatToken &Tok) { |
Daniel Jasper | cd1a32b | 2012-12-21 17:58:39 +0000 | [diff] [blame] | 798 | // Comma is a binary operator, but does not behave as such wrt. formatting. |
Daniel Jasper | cf225b6 | 2012-12-24 13:43:52 +0000 | [diff] [blame] | 799 | return getPrecedence(Tok) > prec::Comma; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 800 | } |
| 801 | |
Daniel Jasper | 112fb27 | 2012-12-05 07:51:39 +0000 | [diff] [blame] | 802 | TokenAnnotation::TokenType determineStarAmpUsage(unsigned Index, |
Nico Weber | 00d5a04 | 2012-12-23 01:07:46 +0000 | [diff] [blame] | 803 | bool IsRHS) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 804 | if (Index == Annotations.size()) |
| 805 | return TokenAnnotation::TT_Unknown; |
| 806 | |
| 807 | if (Index == 0 || Line.Tokens[Index - 1].Tok.is(tok::l_paren) || |
| 808 | Line.Tokens[Index - 1].Tok.is(tok::comma) || |
Nico Weber | 00d5a04 | 2012-12-23 01:07:46 +0000 | [diff] [blame] | 809 | Line.Tokens[Index - 1].Tok.is(tok::kw_return) || |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 810 | Annotations[Index - 1].Type == TokenAnnotation::TT_BinaryOperator) |
| 811 | return TokenAnnotation::TT_UnaryOperator; |
| 812 | |
| 813 | if (Line.Tokens[Index - 1].Tok.isLiteral() || |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 814 | Line.Tokens[Index + 1].Tok.isLiteral() || |
| 815 | Line.Tokens[Index + 1].Tok.is(tok::kw_sizeof)) |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 816 | return TokenAnnotation::TT_BinaryOperator; |
| 817 | |
Daniel Jasper | 112fb27 | 2012-12-05 07:51:39 +0000 | [diff] [blame] | 818 | // It is very unlikely that we are going to find a pointer or reference type |
| 819 | // definition on the RHS of an assignment. |
Nico Weber | 00d5a04 | 2012-12-23 01:07:46 +0000 | [diff] [blame] | 820 | if (IsRHS) |
Daniel Jasper | 112fb27 | 2012-12-05 07:51:39 +0000 | [diff] [blame] | 821 | return TokenAnnotation::TT_BinaryOperator; |
| 822 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 823 | return TokenAnnotation::TT_PointerOrReference; |
| 824 | } |
| 825 | |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 826 | TokenAnnotation::TokenType determinePlusMinusUsage(unsigned Index) { |
| 827 | // At the start of the line, +/- specific ObjectiveC method declarations. |
| 828 | if (Index == 0) |
| 829 | return TokenAnnotation::TT_ObjCMethodSpecifier; |
| 830 | |
| 831 | // Use heuristics to recognize unary operators. |
| 832 | const Token &PreviousTok = Line.Tokens[Index - 1].Tok; |
| 833 | if (PreviousTok.is(tok::equal) || PreviousTok.is(tok::l_paren) || |
| 834 | PreviousTok.is(tok::comma) || PreviousTok.is(tok::l_square) || |
| 835 | PreviousTok.is(tok::question) || PreviousTok.is(tok::colon)) |
| 836 | return TokenAnnotation::TT_UnaryOperator; |
| 837 | |
| 838 | // There can't be to consecutive binary operators. |
| 839 | if (Annotations[Index - 1].Type == TokenAnnotation::TT_BinaryOperator) |
| 840 | return TokenAnnotation::TT_UnaryOperator; |
| 841 | |
| 842 | // Fall back to marking the token as binary operator. |
| 843 | return TokenAnnotation::TT_BinaryOperator; |
| 844 | } |
| 845 | |
| 846 | /// \brief Determine whether ++/-- are pre- or post-increments/-decrements. |
| 847 | TokenAnnotation::TokenType determineIncrementUsage(unsigned Index) { |
| 848 | if (Index != 0 && Line.Tokens[Index - 1].Tok.is(tok::identifier)) |
| 849 | return TokenAnnotation::TT_TrailingUnaryOperator; |
| 850 | |
| 851 | return TokenAnnotation::TT_UnaryOperator; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 852 | } |
| 853 | |
| 854 | bool spaceRequiredBetween(Token Left, Token Right) { |
Daniel Jasper | 8b39c66 | 2012-12-10 18:59:13 +0000 | [diff] [blame] | 855 | if (Right.is(tok::r_paren) || Right.is(tok::semi) || Right.is(tok::comma)) |
| 856 | return false; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 857 | if (Left.is(tok::kw_template) && Right.is(tok::less)) |
| 858 | return true; |
| 859 | if (Left.is(tok::arrow) || Right.is(tok::arrow)) |
| 860 | return false; |
| 861 | if (Left.is(tok::exclaim) || Left.is(tok::tilde)) |
| 862 | return false; |
Fariborz Jahanian | 154120c | 2012-12-20 19:54:13 +0000 | [diff] [blame] | 863 | if (Left.is(tok::at) && Right.is(tok::identifier)) |
| 864 | return false; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 865 | if (Left.is(tok::less) || Right.is(tok::greater) || Right.is(tok::less)) |
| 866 | return false; |
Daniel Jasper | c74e279 | 2012-12-07 09:52:15 +0000 | [diff] [blame] | 867 | if (Right.is(tok::amp) || Right.is(tok::star)) |
| 868 | return Left.isLiteral() || |
| 869 | (Left.isNot(tok::star) && Left.isNot(tok::amp) && |
| 870 | !Style.PointerAndReferenceBindToType); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 871 | if (Left.is(tok::amp) || Left.is(tok::star)) |
| 872 | return Right.isLiteral() || Style.PointerAndReferenceBindToType; |
| 873 | if (Right.is(tok::star) && Left.is(tok::l_paren)) |
| 874 | return false; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 875 | if (Left.is(tok::l_square) || Right.is(tok::l_square) || |
| 876 | Right.is(tok::r_square)) |
| 877 | return false; |
Daniel Jasper | c74e279 | 2012-12-07 09:52:15 +0000 | [diff] [blame] | 878 | if (Left.is(tok::coloncolon) || |
| 879 | (Right.is(tok::coloncolon) && |
| 880 | (Left.is(tok::identifier) || Left.is(tok::greater)))) |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 881 | return false; |
| 882 | if (Left.is(tok::period) || Right.is(tok::period)) |
| 883 | return false; |
| 884 | if (Left.is(tok::colon) || Right.is(tok::colon)) |
| 885 | return true; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 886 | if (Left.is(tok::l_paren)) |
| 887 | return false; |
| 888 | if (Left.is(tok::hash)) |
| 889 | return false; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 890 | if (Right.is(tok::l_paren)) { |
Daniel Jasper | 98e6b4a | 2012-12-21 09:41:31 +0000 | [diff] [blame] | 891 | return Left.is(tok::kw_if) || Left.is(tok::kw_for) || |
| 892 | Left.is(tok::kw_while) || Left.is(tok::kw_switch) || |
| 893 | (Left.isNot(tok::identifier) && Left.isNot(tok::kw_sizeof) && |
| 894 | Left.isNot(tok::kw_typeof)); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 895 | } |
| 896 | return true; |
| 897 | } |
| 898 | |
| 899 | bool canBreakBetween(const FormatToken &Left, const FormatToken &Right) { |
Daniel Jasper | 05b1ac8 | 2012-12-17 11:29:41 +0000 | [diff] [blame] | 900 | if (Right.Tok.is(tok::r_paren) || Right.Tok.is(tok::l_brace) || |
| 901 | Right.Tok.is(tok::comment) || Right.Tok.is(tok::greater)) |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 902 | return false; |
Daniel Jasper | 675d2e3 | 2012-12-21 10:20:02 +0000 | [diff] [blame] | 903 | return (isBinaryOperator(Left) && Left.Tok.isNot(tok::lessless)) || |
| 904 | Left.Tok.is(tok::comma) || Right.Tok.is(tok::lessless) || |
| 905 | Right.Tok.is(tok::arrow) || Right.Tok.is(tok::period) || |
| 906 | Right.Tok.is(tok::colon) || Left.Tok.is(tok::semi) || |
| 907 | Left.Tok.is(tok::l_brace) || |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 908 | (Left.Tok.is(tok::l_paren) && !Right.Tok.is(tok::r_paren)); |
| 909 | } |
| 910 | |
| 911 | const UnwrappedLine &Line; |
| 912 | FormatStyle Style; |
| 913 | SourceManager &SourceMgr; |
| 914 | std::vector<TokenAnnotation> Annotations; |
| 915 | }; |
| 916 | |
Alexander Kornienko | 469a21b | 2012-12-07 16:15:44 +0000 | [diff] [blame] | 917 | class LexerBasedFormatTokenSource : public FormatTokenSource { |
| 918 | public: |
| 919 | LexerBasedFormatTokenSource(Lexer &Lex, SourceManager &SourceMgr) |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 920 | : GreaterStashed(false), Lex(Lex), SourceMgr(SourceMgr), |
Alexander Kornienko | 469a21b | 2012-12-07 16:15:44 +0000 | [diff] [blame] | 921 | IdentTable(Lex.getLangOpts()) { |
| 922 | Lex.SetKeepWhitespaceMode(true); |
| 923 | } |
| 924 | |
| 925 | virtual FormatToken getNextToken() { |
| 926 | if (GreaterStashed) { |
| 927 | FormatTok.NewlinesBefore = 0; |
| 928 | FormatTok.WhiteSpaceStart = |
| 929 | FormatTok.Tok.getLocation().getLocWithOffset(1); |
| 930 | FormatTok.WhiteSpaceLength = 0; |
| 931 | GreaterStashed = false; |
| 932 | return FormatTok; |
| 933 | } |
| 934 | |
| 935 | FormatTok = FormatToken(); |
| 936 | Lex.LexFromRawLexer(FormatTok.Tok); |
| 937 | FormatTok.WhiteSpaceStart = FormatTok.Tok.getLocation(); |
| 938 | |
| 939 | // Consume and record whitespace until we find a significant token. |
| 940 | while (FormatTok.Tok.is(tok::unknown)) { |
| 941 | FormatTok.NewlinesBefore += tokenText(FormatTok.Tok).count('\n'); |
| 942 | FormatTok.WhiteSpaceLength += FormatTok.Tok.getLength(); |
| 943 | |
| 944 | if (FormatTok.Tok.is(tok::eof)) |
| 945 | return FormatTok; |
| 946 | Lex.LexFromRawLexer(FormatTok.Tok); |
| 947 | } |
| 948 | |
| 949 | if (FormatTok.Tok.is(tok::raw_identifier)) { |
Daniel Jasper | cd1a32b | 2012-12-21 17:58:39 +0000 | [diff] [blame] | 950 | IdentifierInfo &Info = IdentTable.get(tokenText(FormatTok.Tok)); |
| 951 | FormatTok.Tok.setIdentifierInfo(&Info); |
Alexander Kornienko | 469a21b | 2012-12-07 16:15:44 +0000 | [diff] [blame] | 952 | FormatTok.Tok.setKind(Info.getTokenID()); |
| 953 | } |
| 954 | |
| 955 | if (FormatTok.Tok.is(tok::greatergreater)) { |
| 956 | FormatTok.Tok.setKind(tok::greater); |
| 957 | GreaterStashed = true; |
| 958 | } |
| 959 | |
| 960 | return FormatTok; |
| 961 | } |
| 962 | |
| 963 | private: |
| 964 | FormatToken FormatTok; |
| 965 | bool GreaterStashed; |
| 966 | Lexer &Lex; |
| 967 | SourceManager &SourceMgr; |
| 968 | IdentifierTable IdentTable; |
| 969 | |
| 970 | /// Returns the text of \c FormatTok. |
| 971 | StringRef tokenText(Token &Tok) { |
| 972 | return StringRef(SourceMgr.getCharacterData(Tok.getLocation()), |
| 973 | Tok.getLength()); |
| 974 | } |
| 975 | }; |
| 976 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 977 | class Formatter : public UnwrappedLineConsumer { |
| 978 | public: |
| 979 | Formatter(const FormatStyle &Style, Lexer &Lex, SourceManager &SourceMgr, |
| 980 | const std::vector<CharSourceRange> &Ranges) |
Daniel Jasper | 1321eb5 | 2012-12-18 21:05:13 +0000 | [diff] [blame] | 981 | : Style(Style), Lex(Lex), SourceMgr(SourceMgr), Ranges(Ranges), |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 982 | StructuralError(false) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 983 | } |
| 984 | |
Daniel Jasper | accb0b0 | 2012-12-04 21:05:31 +0000 | [diff] [blame] | 985 | virtual ~Formatter() { |
| 986 | } |
| 987 | |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 988 | tooling::Replacements format() { |
Alexander Kornienko | 469a21b | 2012-12-07 16:15:44 +0000 | [diff] [blame] | 989 | LexerBasedFormatTokenSource Tokens(Lex, SourceMgr); |
| 990 | UnwrappedLineParser Parser(Style, Tokens, *this); |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 991 | StructuralError = Parser.parse(); |
| 992 | for (std::vector<UnwrappedLine>::iterator I = UnwrappedLines.begin(), |
| 993 | E = UnwrappedLines.end(); |
| 994 | I != E; ++I) |
Alexander Kornienko | 720ffb6 | 2012-12-05 13:56:52 +0000 | [diff] [blame] | 995 | formatUnwrappedLine(*I); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 996 | return Replaces; |
| 997 | } |
| 998 | |
| 999 | private: |
Alexander Kornienko | 720ffb6 | 2012-12-05 13:56:52 +0000 | [diff] [blame] | 1000 | virtual void consumeUnwrappedLine(const UnwrappedLine &TheLine) { |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 1001 | UnwrappedLines.push_back(TheLine); |
| 1002 | } |
| 1003 | |
Alexander Kornienko | 720ffb6 | 2012-12-05 13:56:52 +0000 | [diff] [blame] | 1004 | void formatUnwrappedLine(const UnwrappedLine &TheLine) { |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 1005 | if (TheLine.Tokens.size() == 0) |
| 1006 | return; |
| 1007 | |
| 1008 | CharSourceRange LineRange = |
| 1009 | CharSourceRange::getTokenRange(TheLine.Tokens.front().Tok.getLocation(), |
| 1010 | TheLine.Tokens.back().Tok.getLocation()); |
| 1011 | |
| 1012 | for (unsigned i = 0, e = Ranges.size(); i != e; ++i) { |
| 1013 | if (SourceMgr.isBeforeInTranslationUnit(LineRange.getEnd(), |
| 1014 | Ranges[i].getBegin()) || |
| 1015 | SourceMgr.isBeforeInTranslationUnit(Ranges[i].getEnd(), |
| 1016 | LineRange.getBegin())) |
| 1017 | continue; |
| 1018 | |
| 1019 | TokenAnnotator Annotator(TheLine, Style, SourceMgr); |
| 1020 | Annotator.annotate(); |
| 1021 | UnwrappedLineFormatter Formatter(Style, SourceMgr, TheLine, |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 1022 | Annotator.getAnnotations(), Replaces, |
| 1023 | StructuralError); |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 1024 | Formatter.format(); |
| 1025 | return; |
| 1026 | } |
| 1027 | } |
| 1028 | |
| 1029 | FormatStyle Style; |
| 1030 | Lexer &Lex; |
| 1031 | SourceManager &SourceMgr; |
| 1032 | tooling::Replacements Replaces; |
| 1033 | std::vector<CharSourceRange> Ranges; |
Alexander Kornienko | cff563c | 2012-12-04 17:27:50 +0000 | [diff] [blame] | 1034 | std::vector<UnwrappedLine> UnwrappedLines; |
| 1035 | bool StructuralError; |
Daniel Jasper | bac016b | 2012-12-03 18:12:45 +0000 | [diff] [blame] | 1036 | }; |
| 1037 | |
| 1038 | tooling::Replacements reformat(const FormatStyle &Style, Lexer &Lex, |
| 1039 | SourceManager &SourceMgr, |
| 1040 | std::vector<CharSourceRange> Ranges) { |
| 1041 | Formatter formatter(Style, Lex, SourceMgr, Ranges); |
| 1042 | return formatter.format(); |
| 1043 | } |
| 1044 | |
| 1045 | } // namespace format |
| 1046 | } // namespace clang |