[libTooling] Put all Transformer declarations in a single namespace.

Summary:
This revision introduces a new namespace, `clang::transformer`, to hold
the declarations for the Transformer library.

Reviewers: gribozavr

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D68876

llvm-svn: 374962
diff --git a/clang/unittests/Tooling/TransformerTest.cpp b/clang/unittests/Tooling/TransformerTest.cpp
index feae0c6..c42976a 100644
--- a/clang/unittests/Tooling/TransformerTest.cpp
+++ b/clang/unittests/Tooling/TransformerTest.cpp
@@ -18,9 +18,10 @@
 using namespace clang;
 using namespace tooling;
 using namespace ast_matchers;
-
 namespace {
 using ::testing::IsEmpty;
+using transformer::RewriteRule;
+using transformer::text;
 
 constexpr char KHeaderContents[] = R"cc(
   struct string {
@@ -208,7 +209,7 @@
 TEST_F(TransformerTest, AddIncludeAngled) {
   RewriteRule Rule = makeRule(callExpr(callee(functionDecl(hasName("f")))),
                               change(text("other()")));
-  addInclude(Rule, "clang/OtherLib.h", IncludeFormat::Angled);
+  addInclude(Rule, "clang/OtherLib.h", transformer::IncludeFormat::Angled);
 
   std::string Input = R"cc(
     int f(int x);
@@ -559,7 +560,7 @@
                                   change(name("fun"), text("DECL_RULE")));
 
   RewriteRule Rule = applyFirst({ReplaceF1, DeclRule, ReplaceF1OrF2});
-  EXPECT_EQ(tooling::detail::buildMatchers(Rule).size(), 2UL);
+  EXPECT_EQ(transformer::detail::buildMatchers(Rule).size(), 2UL);
   testRule(Rule, Input, Expected);
 }
 
@@ -795,11 +796,11 @@
 // rules.
 TEST(TransformerDeathTest, OrderedRuleTypes) {
   RewriteRule QualTypeRule = makeRule(qualType(), change(text("Q")));
-  EXPECT_DEATH(tooling::detail::buildMatchers(QualTypeRule),
+  EXPECT_DEATH(transformer::detail::buildMatchers(QualTypeRule),
                "Matcher must be.*node matcher");
 
   RewriteRule TypeRule = makeRule(arrayType(), change(text("T")));
-  EXPECT_DEATH(tooling::detail::buildMatchers(TypeRule),
+  EXPECT_DEATH(transformer::detail::buildMatchers(TypeRule),
                "Matcher must be.*node matcher");
 }
 #endif