Add an AST matcher for hasDefaultArgument() to match on parameter declarations that have a default value.

Patch by Julie Hockett.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@318794 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 0 deletions

diff --git a/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp b/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp
index 3858384e55..9c9304a6f8 100644
--- a/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp
+++ b/unittests/ASTMatchers/ASTMatchersNarrowingTest.cpp
@@ -1991,5 +1991,12 @@ TEST(HasExternalFormalLinkage, Basic) {
                       namedDecl(hasExternalFormalLinkage())));
 }
 
+TEST(HasDefaultArgument, Basic) {
+  EXPECT_TRUE(matches("void x(int val = 0) {}", 
+                      parmVarDecl(hasDefaultArgument())));
+  EXPECT_TRUE(notMatches("void x(int val) {}",
+                      parmVarDecl(hasDefaultArgument())));
+}
+
 } // namespace ast_matchers
 } // namespace clang