Fix to PR8880 (clang dies processing a for loop).

Due to statement expressions supported as GCC extension, it is possible
to put 'break' or 'continue' into a loop/switch statement but outside its
body, for example:

    for ( ; ({ if (first) { first = 0; continue; } 0; }); )

Such usage must be diagnosed as an error, GCC rejects it. To recognize
this and similar patterns the flags BreakScope and ContinueScope are
temporarily turned off while parsing condition expression.

Differential Revision: http://llvm-reviews.chandlerc.com/D1762


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@193073 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/include/clang/Sema/Scope.h b/include/clang/Sema/Scope.h
index 249a4c7431..4b0563ed54 100644
--- a/include/clang/Sema/Scope.h
+++ b/include/clang/Sema/Scope.h
@@ -342,6 +342,16 @@ public:
   /// Init - This is used by the parser to implement scope caching.
   ///
   void Init(Scope *parent, unsigned flags);
+
+  /// \brief Sets up the specified scope flags and adjusts the scope state
+  /// variables accordingly.
+  ///
+  void SetFlags(unsigned Flags);
+
+  /// \brief Clears the specified scope flags and adjusts the scope state
+  /// variables accordingly.
+  ///
+  void ClearFlags(unsigned Flags);
 };
 
 }  // end namespace clang