New matcher for MaterializeTemporaryExpr
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162609 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/ASTMatchers/ASTMatchers.h b/include/clang/ASTMatchers/ASTMatchers.h
index 2cd409c..25d10a5 100644
--- a/include/clang/ASTMatchers/ASTMatchers.h
+++ b/include/clang/ASTMatchers/ASTMatchers.h
@@ -552,6 +552,28 @@
Stmt,
CXXBindTemporaryExpr> bindTemporaryExpr;
+/// \brief Matches nodes where temporaries are materialized.
+///
+/// Example: Given
+/// \code
+/// struct T {void func()};
+/// T f();
+/// void g(T);
+/// \endcode
+/// materializeTemporaryExpr() matches 'f()' in these statements
+/// \code
+/// T u(f());
+/// g(f());
+/// \endcode
+/// but does not match
+/// \code
+/// f();
+/// f().func();
+/// \endcode
+const internal::VariadicDynCastAllOfMatcher<
+ Stmt,
+ MaterializeTemporaryExpr> materializeTemporaryExpr;
+
/// \brief Matches new expressions.
///
/// Given
diff --git a/unittests/ASTMatchers/ASTMatchersTest.cpp b/unittests/ASTMatchers/ASTMatchersTest.cpp
index 81f6808..951bca9 100644
--- a/unittests/ASTMatchers/ASTMatchersTest.cpp
+++ b/unittests/ASTMatchers/ASTMatchersTest.cpp
@@ -1296,6 +1296,41 @@
TempExpression));
}
+TEST(MaterializeTemporaryExpr, MatchesTemporary) {
+ std::string ClassString =
+ "class string { public: string(); int length(); }; ";
+
+ EXPECT_TRUE(
+ matches(ClassString +
+ "string GetStringByValue();"
+ "void FunctionTakesString(string s);"
+ "void run() { FunctionTakesString(GetStringByValue()); }",
+ materializeTemporaryExpr()));
+
+ EXPECT_TRUE(
+ notMatches(ClassString +
+ "string* GetStringPointer(); "
+ "void FunctionTakesStringPtr(string* s);"
+ "void run() {"
+ " string* s = GetStringPointer();"
+ " FunctionTakesStringPtr(GetStringPointer());"
+ " FunctionTakesStringPtr(s);"
+ "}",
+ materializeTemporaryExpr()));
+
+ EXPECT_TRUE(
+ notMatches(ClassString +
+ "string GetStringByValue();"
+ "void run() { int k = GetStringByValue().length(); }",
+ materializeTemporaryExpr()));
+
+ EXPECT_TRUE(
+ notMatches(ClassString +
+ "string GetStringByValue();"
+ "void run() { GetStringByValue(); }",
+ materializeTemporaryExpr()));
+}
+
TEST(ConstructorDeclaration, SimpleCase) {
EXPECT_TRUE(matches("class Foo { Foo(int i); };",
constructorDecl(ofClass(hasName("Foo")))));
