Add voidType() matcher.

Summary: Add voidType() matcher.

Reviewers: klimek

Subscribers: klimek, cfe-commits

Differential Revision: http://reviews.llvm.org/D6656

llvm-svn: 224250

3 files changed, 18 insertions, 0 deletions

diff --git a/clang/include/clang/ASTMatchers/ASTMatchers.h b/clang/include/clang/ASTMatchers/ASTMatchers.h
index 9d20c9e0f5e..b6cddfa6d9f 100644
--- a/clang/include/clang/ASTMatchers/ASTMatchers.h
+++ b/clang/include/clang/ASTMatchers/ASTMatchers.h
@@ -3211,6 +3211,18 @@ AST_MATCHER_FUNCTION_P_OVERLOAD(internal::BindableMatcher<TypeLoc>, loc,
       new internal::TypeLocTypeMatcher(InnerMatcher));
 }
 
+/// \brief Matches type \c void.
+///
+/// Given
+/// \code
+///  struct S { void func(); };
+/// \endcode
+/// functionDecl(returns(voidType()))
+///   matches "void func();"
+AST_MATCHER(Type, voidType) {
+  return Node.isVoidType();
+}
+
 /// \brief Matches builtin Types.
 ///
 /// Given
diff --git a/clang/lib/ASTMatchers/Dynamic/Registry.cpp b/clang/lib/ASTMatchers/Dynamic/Registry.cpp
index c0816ace44e..d550a89cad4 100644
--- a/clang/lib/ASTMatchers/Dynamic/Registry.cpp
+++ b/clang/lib/ASTMatchers/Dynamic/Registry.cpp
@@ -332,6 +332,7 @@ RegistryMaps::RegistryMaps() {
   REGISTER_MATCHER(valueDecl);
   REGISTER_MATCHER(varDecl);
   REGISTER_MATCHER(variableArrayType);
+  REGISTER_MATCHER(voidType);
   REGISTER_MATCHER(whileStmt);
   REGISTER_MATCHER(withInitializer);
 }
diff --git a/clang/unittests/ASTMatchers/ASTMatchersTest.cpp b/clang/unittests/ASTMatchers/ASTMatchersTest.cpp
index 1304d64a187..d2e9ee19b2c 100644
--- a/clang/unittests/ASTMatchers/ASTMatchersTest.cpp
+++ b/clang/unittests/ASTMatchers/ASTMatchersTest.cpp
@@ -3857,6 +3857,11 @@ TEST(TypeMatching, MatchesTypes) {
   EXPECT_TRUE(matches("struct S {};", qualType().bind("loc")));
 }
 
+TEST(TypeMatching, MatchesVoid) {
+  EXPECT_TRUE(
+      matches("struct S { void func(); };", methodDecl(returns(voidType()))));
+}
+
 TEST(TypeMatching, MatchesArrayTypes) {
   EXPECT_TRUE(matches("int a[] = {2,3};", arrayType()));
   EXPECT_TRUE(matches("int a[42];", arrayType()));