Implements the thisExpr matcher.

Patch by Gabor Horvath.

llvm-svn: 166477

clang/include/clang/ASTMatchers/ASTMatchers.h

@@ -546,6 +546,18 @@ const internal::VariadicDynCastAllOfMatcher<
   Stmt,
   CXXConstructExpr> constructExpr;
 
+/// \brief Matches implicit and explicit this expressions.
+///
+/// Example matches the implicit this expression in "return i".
+///     (matcher = thisExpr())
+/// \code
+/// struct foo {
+///   int i;
+///   int f() { return i; }
+/// };
+/// \endcode
+const internal::VariadicDynCastAllOfMatcher<Stmt, CXXThisExpr> thisExpr;
+
 /// \brief Matches nodes where temporaries are created.
 ///
 /// Example matches FunctionTakesString(GetStringByValue())

clang/unittests/ASTMatchers/ASTMatchersTest.cpp

@@ -1333,6 +1333,13 @@ TEST(Matcher, ConstructorArgumentCount) {
                  Constructor1Arg));
 }
 
+TEST(Matcher,ThisExpr) {
+  EXPECT_TRUE(
+      matches("struct X { int a; int f () { return a; } };", thisExpr()));
+  EXPECT_TRUE(
+      notMatches("struct X { int f () { int a; return a; } };", thisExpr()));
+}
+
 TEST(Matcher, BindTemporaryExpression) {
   StatementMatcher TempExpression = bindTemporaryExpr();