Add an API call to retrieve the spelling data of a token from its SourceLocation.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127216 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp
index 6fe414b664..40227dc5e6 100644
--- a/lib/Lex/Preprocessor.cpp
+++ b/lib/Lex/Preprocessor.cpp
@@ -278,6 +278,16 @@ void Preprocessor::CodeCompleteNaturalLanguage() {
     CodeComplete->CodeCompleteNaturalLanguage();
 }
 
+llvm::StringRef Preprocessor::getSpelling(SourceLocation loc,
+                                          bool *invalid) const {
+  bool invalidTemp = false;
+  if (!invalid) invalid = &invalidTemp;
+  const char *begin = SourceMgr.getCharacterData(loc, invalid);
+  if (*invalid) return llvm::StringRef();
+
+  unsigned length = Lexer::MeasureTokenLength(loc, SourceMgr, Features);
+  return llvm::StringRef(begin, length);
+}
 
 /// getSpelling - This method is used to get the spelling of a token into a
 /// SmallVector. Note that the returned StringRef may not point to the