add a handy predicate.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73310 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/include/clang/Basic/SourceManager.h b/include/clang/Basic/SourceManager.h
index 4336982938..57ae9a4511 100644
--- a/include/clang/Basic/SourceManager.h
+++ b/include/clang/Basic/SourceManager.h
@@ -593,6 +593,12 @@ public:
     return getFileCharacteristic(Loc) != SrcMgr::C_User;
   }
   
+  /// isInExternCSystemHeader - Returns if a SourceLocation is in an "extern C"
+  /// system header.
+  bool isInExternCSystemHeader(SourceLocation Loc) const {
+    return getFileCharacteristic(Loc) == SrcMgr::C_ExternCSystem;
+  }
+  
   //===--------------------------------------------------------------------===//
   // Line Table Manipulation Routines
   //===--------------------------------------------------------------------===//