Implement C++ semantics for C-style and functional-style casts. This regresses Clang extension conversions, like vectors, but allows conversions via constructors and conversion operators.
Add custom conversions to static_cast.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77076 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaOverload.cpp b/lib/Sema/SemaOverload.cpp
index dc5f3e8..dc8d40b 100644
--- a/lib/Sema/SemaOverload.cpp
+++ b/lib/Sema/SemaOverload.cpp
@@ -1136,7 +1136,7 @@
 
 /// CheckPointerConversion - Check the pointer conversion from the
 /// expression From to the type ToType. This routine checks for
-/// ambiguous (FIXME: or inaccessible) derived-to-base pointer
+/// ambiguous or inaccessible derived-to-base pointer
 /// conversions for which IsPointerConversion has already returned
 /// true. It returns true and produces a diagnostic if there was an
 /// error, or returns false otherwise.