[PATCH] ASTMatchers: Add support for Objective-C

[Manuel Klimek]

Apart from the code layout (and that I have no idea about Obj-C) looks good.
Please also don't forget to update the docs:
$ cd docs/tools
$ python dump_ast_matchers.py

================
Comment at: include/clang/ASTMatchers/ASTMatchers.h:3713-3714
@@ +3712,4 @@
+///   matches '[_ivar release]', '[super dealloc]' and '[NSArray alloc]'.
+const internal::VariadicDynCastAllOfMatcher<Stmt, ObjCMessageExpr>
+    objCMessageExpr;
+
----------------
I'd prefer grouping this with the other node matchers on top of the file.

================
Comment at: unittests/ASTMatchers/ASTMatchersTest.cpp:4456
@@ -4455,1 +4455,3 @@
 
+TEST(ObjectiveC, ObjCMessageExpr) {
+  EXPECT_TRUE(matchesWithObjC(
----------------
I assume we'll have more obj-c stuff coming, and this already compiles pretty slow, so I'd prefer to split out an ASTMatchersObjCTest.cpp/.h unless you see specific reasons not to do that.

http://reviews.llvm.org/D5056