From: Aaron Ballman <aaron@aaronballman.com>
Date: Fri, 28 Aug 2015 19:39:21 +0000 (+0000)
Subject: Adding an AST matcher for namespaceAliasDecl.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e80122dbc395135d848c6c85499ca4552a48d0e7;p=clang

Adding an AST matcher for namespaceAliasDecl.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@246322 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/docs/LibASTMatchersReference.html b/docs/LibASTMatchersReference.html
index bf186145d6..8be0aa9eb8 100644
--- a/docs/LibASTMatchersReference.html
+++ b/docs/LibASTMatchersReference.html
@@ -285,6 +285,17 @@ Example matches X, S, the anonymous union type, i, and U;
 </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('namespaceAliasDecl0')"><a name="namespaceAliasDecl0Anchor">namespaceAliasDecl</a></td><td>Matcher&lt<a href="http://clang.llvm.org/doxygen/classclang_1_1NamespaceAliasDecl.html">NamespaceAliasDecl</a>&gt;...</td></tr>
+<tr><td colspan="4" class="doc" id="namespaceAliasDecl0"><pre>Matches a declaration of a namespace alias.
+
+Given
+  namespace test {}
+  namespace alias = ::test;
+namespaceAliasDecl()
+  matches "namespace alias" but not "namespace test"
+</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('namespaceDecl0')"><a name="namespaceDecl0Anchor">namespaceDecl</a></td><td>Matcher&lt<a href="http://clang.llvm.org/doxygen/classclang_1_1NamespaceDecl.html">NamespaceDecl</a>&gt;...</td></tr>
 <tr><td colspan="4" class="doc" id="namespaceDecl0"><pre>Matches a declaration of a namespace.
 
diff --git a/include/clang/ASTMatchers/ASTMatchers.h b/include/clang/ASTMatchers/ASTMatchers.h
index 46f30f06d5..cb10daf89e 100644
--- a/include/clang/ASTMatchers/ASTMatchers.h
+++ b/include/clang/ASTMatchers/ASTMatchers.h
@@ -292,6 +292,18 @@ const internal::VariadicDynCastAllOfMatcher<Decl, NamedDecl> namedDecl;
 ///   matches "namespace {}" and "namespace test {}"
 const internal::VariadicDynCastAllOfMatcher<Decl, NamespaceDecl> namespaceDecl;
 
+/// \brief Matches a declaration of a namespace alias.
+///
+/// Given
+/// \code
+///   namespace test {}
+///   namespace alias = ::test;
+/// \endcode
+/// namespaceAliasDecl()
+///   matches "namespace alias" but not "namespace test"
+const internal::VariadicDynCastAllOfMatcher<Decl, NamespaceAliasDecl>
+    namespaceAliasDecl;
+
 /// \brief Matches C++ class declarations.
 ///
 /// Example matches \c X, \c Z
diff --git a/lib/ASTMatchers/Dynamic/Registry.cpp b/lib/ASTMatchers/Dynamic/Registry.cpp
index 1544b08434..8601a3804d 100644
--- a/lib/ASTMatchers/Dynamic/Registry.cpp
+++ b/lib/ASTMatchers/Dynamic/Registry.cpp
@@ -288,6 +288,7 @@ RegistryMaps::RegistryMaps() {
   REGISTER_MATCHER(memberPointerType);
   REGISTER_MATCHER(methodDecl);
   REGISTER_MATCHER(namedDecl);
+  REGISTER_MATCHER(namespaceAliasDecl);
   REGISTER_MATCHER(namespaceDecl);
   REGISTER_MATCHER(namesType);
   REGISTER_MATCHER(nestedNameSpecifier);
diff --git a/unittests/ASTMatchers/ASTMatchersTest.cpp b/unittests/ASTMatchers/ASTMatchersTest.cpp
index 5bc66f6c03..b4fc09084b 100644
--- a/unittests/ASTMatchers/ASTMatchersTest.cpp
+++ b/unittests/ASTMatchers/ASTMatchersTest.cpp
@@ -4369,6 +4369,11 @@ TEST(NS, Anonymous) {
   EXPECT_TRUE(matches("namespace {}", namespaceDecl(isAnonymous())));
 }
 
+TEST(NS, Alias) {
+  EXPECT_TRUE(matches("namespace test {} namespace alias = ::test;",
+                      namespaceAliasDecl(hasName("alias"))));
+}
+
 TEST(NNS, MatchesTypes) {
   NestedNameSpecifierMatcher Matcher = nestedNameSpecifier(
     specifiesType(hasDeclaration(recordDecl(hasName("A")))));