Improve error recovery around colon.

Recognize additional cases, when '::' is mistyped as ':'.
This is a fix to RP18587 - colons have too much protection in member-declarations
Review is tracked by http://reviews.llvm.org/D3653.

This is an attempt to recommit the fix, initially committed as r212957 but then
reverted in r212965 as it broke self-build. In the updated patch ParseDirectDeclarator
turns on colon protection in for context as well.

llvm-svn: 213120

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/enum-bitfield.cpp b/clang/test/SemaCXX/enum-bitfield.cpp
index 63445ca0583..ec849b79a74 100644
--- a/clang/test/SemaCXX/enum-bitfield.cpp
+++ b/clang/test/SemaCXX/enum-bitfield.cpp
@@ -16,3 +16,15 @@ struct Y {
   enum E : int(2);
   enum E : Z(); // expected-error{{integral constant expression must have integral or unscoped enumeration type, not 'Z'}}
 };
+
+namespace pr18587 {
+struct A {
+  enum class B {
+    C
+  };
+};
+const int C = 4;
+struct D {
+  A::B : C;
+};
+}