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/for-range-examples.cpp b/clang/test/SemaCXX/for-range-examples.cpp
index 329be6362dd..2f777fb46df 100644
--- a/clang/test/SemaCXX/for-range-examples.cpp
+++ b/clang/test/SemaCXX/for-range-examples.cpp
@@ -227,3 +227,15 @@ namespace test7 {
     for (e [[deprecated]] : arr) { e = 0; } // expected-warning {{deprecated}} expected-note {{here}} expected-warning {{extension}}
   }
 }
+
+namespace pr18587 {
+  class Arg {};
+  struct Cont {
+    int *begin();
+    int *end();
+  };
+  void AddAllArgs(Cont &x) {
+    for (auto Arg: x) {
+    }
+  }
+}