refactor the 'ColonIsSacred' argument to ParseOptionalCXXScopeSpecifier

to be a bool in Parser that is twiddled by the ColonProtectionRAIIObject
class.  No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91014 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 20 insertions, 1 deletions

diff --git a/lib/Parse/RAIIObjectsForParser.h b/lib/Parse/RAIIObjectsForParser.h
index d642da58d5..d18d2f8026 100644
--- a/lib/Parse/RAIIObjectsForParser.h
+++ b/lib/Parse/RAIIObjectsForParser.h
@@ -36,6 +36,25 @@ namespace clang {
       Diags.DecrementAllExtensionsSilenced();
     }
   };
-}
+  
+  // TODO: move GreaterThanIsOperatorScope here.
+  
+  /// ColonProtectionRAIIObject - This sets the Parser::ColonIsSacred bool and
+  /// restores it when destroyed.  This says that "foo:" should not be
+  /// considered a possible typo for "foo::" for error recovery purposes.
+  class ColonProtectionRAIIObject {
+    Parser &P;
+    bool OldVal;
+  public:
+    ColonProtectionRAIIObject(Parser &p) : P(p), OldVal(P.ColonIsSacred) {
+      P.ColonIsSacred = true;
+    }
+    
+    ~ColonProtectionRAIIObject() {
+      P.ColonIsSacred = OldVal;
+    }
+  };
+  
+} // end namespace clang
 
 #endif