Teach CIndex's cursor visitor to restrict its traversal to a specific

region of interest (if provided). Implement clang_getCursor() in terms
of this traversal rather than using the Index library; the unified
cursor visitor is more complete, and will be The Way Forward.

Minor other tweaks needed to make this work:
  - Extend Preprocessor::getLocForEndOfToken() to accept an offset
  from the end, making it easy to move to the last character in the
  token (rather than just past the end of the token).
  - In Lexer::MeasureTokenLength(), the length of whitespace is zero.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@94200 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 1 deletions

diff --git a/include/clang/Lex/Preprocessor.h b/include/clang/Lex/Preprocessor.h
index 1e664c07a4..dedbbd868a 100644
--- a/include/clang/Lex/Preprocessor.h
+++ b/include/clang/Lex/Preprocessor.h
@@ -602,7 +602,12 @@ public:
   /// the returned source location would not be meaningful (e.g., if
   /// it points into a macro), this routine returns an invalid
   /// source location.
-  SourceLocation getLocForEndOfToken(SourceLocation Loc);
+  ///
+  /// \param Offset an offset from the end of the token, where the source
+  /// location should refer to. The default offset (0) produces a source
+  /// location pointing just past the end of the token; an offset of 1 produces
+  /// a source location pointing to the last character in the token, etc.
+  SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset = 0);
 
   /// DumpToken - Print the token to stderr, used for debugging.
   ///