Add missing matcher for C-style cast expressions.

Patch by Gábor Horváth.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164123 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/ASTMatchers/ASTMatchers.h

@@ -865,6 +865,16 @@ const internal::VariadicDynCastAllOfMatcher<
   Stmt,
   CXXConstCastExpr> constCastExpr;
 
+/// \brief Matches a C-style cast expression.
+///
+/// Example: Matches (int*) 2.2f in
+/// \code
+///   int i = (int) 2.2f;
+/// \endcode
+const internal::VariadicDynCastAllOfMatcher<
+  Stmt,
+  CStyleCastExpr> cStyleCastExpr;
+
 /// \brief Matches explicit cast expressions.
 ///
 /// Matches any cast expression written in user code, whether it be a

unittests/ASTMatchers/ASTMatchersTest.cpp

@@ -2229,6 +2229,20 @@ TEST(StaticCast, DoesNotMatchOtherCasts) {
                          staticCastExpr()));
 }
 
+TEST(CStyleCast, MatchesSimpleCase) {
+  EXPECT_TRUE(matches("int i = (int) 2.2f;", cStyleCastExpr()));
+}
+
+TEST(CStyleCast, DoesNotMatchOtherCasts) {
+  EXPECT_TRUE(notMatches("char* p = static_cast<char*>(0);"
+                         "char q, *r = const_cast<char*>(&q);"
+                         "void* s = reinterpret_cast<char*>(&s);"
+                         "struct B { virtual ~B() {} }; struct D : B {};"
+                         "B b;"
+                         "D* t = dynamic_cast<D*>(&b);",
+                         cStyleCastExpr()));
+}
+
 TEST(HasDestinationType, MatchesSimpleCase) {
   EXPECT_TRUE(matches("char* p = static_cast<char*>(0);",
                       staticCastExpr(hasDestinationType(