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
diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp
index 586202b..5689baa 100644
--- a/lib/Lex/Preprocessor.cpp
+++ b/lib/Lex/Preprocessor.cpp
@@ -429,21 +429,17 @@
return TokStart.getFileLocWithOffset(PhysOffset);
}
-/// \brief Computes the source location just past the end of the
-/// token at this source location.
-///
-/// This routine can be used to produce a source location that
-/// points just past the end of the token referenced by \p Loc, and
-/// is generally used when a diagnostic needs to point just after a
-/// token where it expected something different that it received. If
-/// the returned source location would not be meaningful (e.g., if
-/// it points into a macro), this routine returns an invalid
-/// source location.
-SourceLocation Preprocessor::getLocForEndOfToken(SourceLocation Loc) {
+SourceLocation Preprocessor::getLocForEndOfToken(SourceLocation Loc,
+ unsigned Offset) {
if (Loc.isInvalid() || !Loc.isFileID())
return SourceLocation();
unsigned Len = Lexer::MeasureTokenLength(Loc, getSourceManager(), Features);
+ if (Len > Offset)
+ Len = Len - Offset;
+ else
+ return Loc;
+
return AdvanceToTokenCharacter(Loc, Len);
}