Vendor import of clang trunk r130700:

http://llvm.org/svn/llvm-project/cfe/trunk@130700

1 files changed, 5 insertions, 0 deletions

diff --git a/include/clang/Lex/HeaderMap.h b/include/clang/Lex/HeaderMap.h
index 8a5c83e..e333840 100644
--- a/include/clang/Lex/HeaderMap.h
+++ b/include/clang/Lex/HeaderMap.h
@@ -17,6 +17,7 @@
 namespace llvm {
   class MemoryBuffer;
   class StringRef;
+  template <typename T> class SmallVectorImpl;
 }
 namespace clang {
   class FileEntry;
@@ -47,6 +48,10 @@ public:
 
   /// LookupFile - Check to see if the specified relative filename is located in
   /// this HeaderMap.  If so, open it and return its FileEntry.
+  /// If RawPath is not NULL and the file is found, RawPath will be set to the
+  /// raw path at which the file was found in the file system. For example,
+  /// for a search path ".." and a filename "../file.h" this would be
+  /// "../../file.h".
   const FileEntry *LookupFile(llvm::StringRef Filename, FileManager &FM) const;
 
   /// getFileName - Return the filename of the headermap.