From: Eric Liu <ioeric@google.com>
Date: Tue, 28 Mar 2017 12:56:47 +0000 (+0000)
Subject: [ASTMatchers] add typeAliasTemplateDecl matcher.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=54a8f5f00ec601038e1fb67c1f480a75f6a95707;p=clang

[ASTMatchers] add typeAliasTemplateDecl matcher.

Reviewers: hokein, aaron.ballman

Reviewed By: aaron.ballman

Subscribers: aaron.ballman, cfe-commits, klimek

Differential Revision: https://reviews.llvm.org/D28671

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@298912 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/docs/LibASTMatchersReference.html b/docs/LibASTMatchersReference.html
index dd29149e63..736e1dfcab 100644
--- a/docs/LibASTMatchersReference.html
+++ b/docs/LibASTMatchersReference.html
@@ -469,6 +469,15 @@ typeAliasDecl()
 </pre></td></tr>
 
 
+<tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1Decl.html">Decl</a>&gt;</td><td class="name" onclick="toggle('typeAliasTemplateDecl0')"><a name="typeAliasTemplateDecl0Anchor">typeAliasTemplateDecl</a></td><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1TypeAliasTemplateDecl.html">TypeAliasTemplateDecl</a>&gt;...</td></tr>
+<tr><td colspan="4" class="doc" id="typeAliasTemplateDecl0"><pre>Matches type alias template declarations.
+
+typeAliasTemplateDecl() matches
+  template &lt;typename T&gt;
+  using Y = X&lt;T&gt;;
+</pre></td></tr>
+
+
 <tr><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1Decl.html">Decl</a>&gt;</td><td class="name" onclick="toggle('typedefDecl0')"><a name="typedefDecl0Anchor">typedefDecl</a></td><td>Matcher&lt;<a href="http://clang.llvm.org/doxygen/classclang_1_1TypedefDecl.html">TypedefDecl</a>&gt;...</td></tr>
 <tr><td colspan="4" class="doc" id="typedefDecl0"><pre>Matches typedef declarations.
 
diff --git a/include/clang/ASTMatchers/ASTMatchers.h b/include/clang/ASTMatchers/ASTMatchers.h
index 1f11c71cf8..7a436956cb 100644
--- a/include/clang/ASTMatchers/ASTMatchers.h
+++ b/include/clang/ASTMatchers/ASTMatchers.h
@@ -180,6 +180,16 @@ const internal::VariadicDynCastAllOfMatcher<Decl, TypedefNameDecl>
 ///   matches "using Y = int", but not "typedef int X"
 const internal::VariadicDynCastAllOfMatcher<Decl, TypeAliasDecl> typeAliasDecl;
 
+/// \brief Matches type alias template declarations.
+///
+/// typeAliasTemplateDecl() matches
+/// \code
+///   template <typename T>
+///   using Y = X<T>;
+/// \endcode
+const internal::VariadicDynCastAllOfMatcher<Decl, TypeAliasTemplateDecl>
+    typeAliasTemplateDecl;
+
 /// \brief Matches AST nodes that were expanded within the main-file.
 ///
 /// Example matches X but not Y
diff --git a/lib/ASTMatchers/Dynamic/Registry.cpp b/lib/ASTMatchers/Dynamic/Registry.cpp
index a73f522efc..59070ff458 100644
--- a/lib/ASTMatchers/Dynamic/Registry.cpp
+++ b/lib/ASTMatchers/Dynamic/Registry.cpp
@@ -417,6 +417,7 @@ RegistryMaps::RegistryMaps() {
   REGISTER_MATCHER(typedefNameDecl);
   REGISTER_MATCHER(typedefType);
   REGISTER_MATCHER(typeAliasDecl);
+  REGISTER_MATCHER(typeAliasTemplateDecl);
   REGISTER_MATCHER(typeLoc);
   REGISTER_MATCHER(unaryExprOrTypeTraitExpr);
   REGISTER_MATCHER(unaryOperator);
diff --git a/unittests/ASTMatchers/ASTMatchersNodeTest.cpp b/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
index 4c13acfaf0..5c29334222 100644
--- a/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
+++ b/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
@@ -1494,6 +1494,22 @@ TEST(TypedefNameDeclMatcher, Match) {
                       typedefNameDecl(hasName("typedefNameDeclTest2"))));
 }
 
+TEST(TypeAliasTemplateDeclMatcher, Match) {
+  std::string Code = R"(
+    template <typename T>
+    class X { T t; };
+
+    template <typename T>
+    using typeAliasTemplateDecl = X<T>;
+
+    using typeAliasDecl = X<int>;
+  )";
+  EXPECT_TRUE(
+      matches(Code, typeAliasTemplateDecl(hasName("typeAliasTemplateDecl"))));
+  EXPECT_TRUE(
+      notMatches(Code, typeAliasTemplateDecl(hasName("typeAliasDecl"))));
+}
+
 TEST(ObjCMessageExprMatcher, SimpleExprs) {
   // don't find ObjCMessageExpr where none are present
   EXPECT_TRUE(notMatchesObjC("", objcMessageExpr(anything())));