make getFileCharacteristic linetable aware. line markers that

play around with the 'is system header' bit now function correctly.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63720 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 5 deletions

diff --git a/include/clang/Basic/SourceManager.h b/include/clang/Basic/SourceManager.h
index e24e623899..565cb0e17e 100644
--- a/include/clang/Basic/SourceManager.h
+++ b/include/clang/Basic/SourceManager.h
@@ -495,11 +495,15 @@ public:
   unsigned getInstantiationLineNumber(SourceLocation Loc) const;
   unsigned getSpellingLineNumber(SourceLocation Loc) const;
   
-  // FIXME: This should handle #line.
-  SrcMgr::CharacteristicKind getFileCharacteristic(SourceLocation Loc) const {
-    FileID FID = getFileID(getSpellingLoc(Loc));
-    return getSLocEntry(FID).getFile().getFileCharacteristic();
-  }
+  /// getFileCharacteristic - return the file characteristic of the specified
+  /// source location, indicating whether this is a normal file, a system 
+  /// header, or an "implicit extern C" system header.
+  ///
+  /// This state can be modified with flags on GNU linemarker directives like:
+  ///   # 4 "foo.h" 3
+  /// which changes all source locations in the current file after that to be
+  /// considered to be from a system header.
+  SrcMgr::CharacteristicKind getFileCharacteristic(SourceLocation Loc) const;
   
   /// getPresumedLoc - This method returns the "presumed" location of a
   /// SourceLocation specifies.  A "presumed location" can be modified by #line