[PATCH] [ASTMatchers] Make hasOverloadedOperatorName also match freestanding overloads.

[Benjamin Kramer]

Hi djasper,

Freestanding overloads are represented as FunctionDecls in the AST, make
the matcher also match them.

http://reviews.llvm.org/D4493

Files:
  include/clang/ASTMatchers/ASTMatchers.h
  include/clang/ASTMatchers/ASTMatchersInternal.h
  unittests/ASTMatchers/ASTMatchersTest.cpp

Index: include/clang/ASTMatchers/ASTMatchers.h
===================================================================
--- include/clang/ASTMatchers/ASTMatchers.h
+++ include/clang/ASTMatchers/ASTMatchers.h
@@ -1542,14 +1542,14 @@
 /// line and \c recordDecl(hasMethod(hasOverloadedOperatorName("*"))) matches
 /// the declaration of \c A.
 ///
-/// Usable as: Matcher<CXXOperatorCallExpr>, Matcher<CXXMethodDecl>
+/// Usable as: Matcher<CXXOperatorCallExpr>, Matcher<FunctionDecl>
 inline internal::PolymorphicMatcherWithParam1<
     internal::HasOverloadedOperatorNameMatcher, StringRef,
-    AST_POLYMORPHIC_SUPPORTED_TYPES_2(CXXOperatorCallExpr, CXXMethodDecl)>
+    AST_POLYMORPHIC_SUPPORTED_TYPES_2(CXXOperatorCallExpr, FunctionDecl)>
 hasOverloadedOperatorName(const StringRef Name) {
   return internal::PolymorphicMatcherWithParam1<
       internal::HasOverloadedOperatorNameMatcher, StringRef,
-      AST_POLYMORPHIC_SUPPORTED_TYPES_2(CXXOperatorCallExpr, CXXMethodDecl)>(
+      AST_POLYMORPHIC_SUPPORTED_TYPES_2(CXXOperatorCallExpr, FunctionDecl)>(
       Name);
 }
 
Index: include/clang/ASTMatchers/ASTMatchersInternal.h
===================================================================
--- include/clang/ASTMatchers/ASTMatchersInternal.h
+++ include/clang/ASTMatchers/ASTMatchersInternal.h
@@ -517,7 +517,7 @@
 template <typename T, typename ArgT>
 class HasOverloadedOperatorNameMatcher : public SingleNodeMatcherInterface<T> {
   static_assert(std::is_same<T, CXXOperatorCallExpr>::value ||
-                std::is_same<T, CXXMethodDecl>::value,
+                std::is_base_of<FunctionDecl, T>::value,
                 "unsupported class for matcher");
   static_assert(std::is_same<ArgT, StringRef>::value,
                 "argument type must be StringRef");
@@ -541,7 +541,7 @@
 
   /// \brief Returns true only if CXXMethodDecl represents an overloaded
   /// operator and has the given operator name.
-  bool matchesSpecialized(const CXXMethodDecl &Node) const {
+  bool matchesSpecialized(const FunctionDecl &Node) const {
     return Node.isOverloadedOperator() &&
            getOperatorSpelling(Node.getOverloadedOperator()) == Name;
   }
Index: unittests/ASTMatchers/ASTMatchersTest.cpp
===================================================================
--- unittests/ASTMatchers/ASTMatchersTest.cpp
+++ unittests/ASTMatchers/ASTMatchersTest.cpp
@@ -1095,12 +1095,19 @@
               "bool operator&&(Y x, Y y) { return true; }; "
               "Y a; Y b; bool c = a && b;",
               OpCallLessLess));
+  StatementMatcher OpStarCall =
+      operatorCallExpr(hasOverloadedOperatorName("*"));
+  EXPECT_TRUE(matches("class Y; int operator*(Y &); void f(Y &y) { *y; }",
+              OpStarCall));
   DeclarationMatcher ClassWithOpStar =
     recordDecl(hasMethod(hasOverloadedOperatorName("*")));
   EXPECT_TRUE(matches("class Y { int operator*(); };",
                       ClassWithOpStar));
   EXPECT_TRUE(notMatches("class Y { void myOperator(); };",
               ClassWithOpStar)) ;
+  DeclarationMatcher AnyOpStar = functionDecl(hasOverloadedOperatorName("*"));
+  EXPECT_TRUE(matches("class Y; int operator*(Y &);", AnyOpStar));
+  EXPECT_TRUE(matches("class Y { int operator*(); };", AnyOpStar));
 }
 
 TEST(Matcher, NestedOverloadedOperatorCalls) {
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