Introduce Lexer::makeFileCharRange() that accepts a token source range
and returns a character range with file locations.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148480 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Lexer.cpp b/lib/Lex/Lexer.cpp
index ddb5ecc..1a469be 100644
--- a/lib/Lex/Lexer.cpp
+++ b/lib/Lex/Lexer.cpp
@@ -792,6 +792,35 @@
return isAtEndOfMacroExpansion(expansionLoc, SM, LangOpts, MacroEnd);
}
+/// \brief Accepts a token source range and returns a character range with
+/// file locations.
+/// Returns a null range if a part of the range resides inside a macro
+/// expansion or the range does not reside on the same FileID.
+CharSourceRange Lexer::makeFileCharRange(SourceRange TokenRange,
+ const SourceManager &SM,
+ const LangOptions &LangOpts) {
+ SourceLocation Begin = TokenRange.getBegin();
+ if (Begin.isInvalid())
+ return CharSourceRange();
+
+ if (Begin.isMacroID())
+ if (!isAtStartOfMacroExpansion(Begin, SM, LangOpts, &Begin))
+ return CharSourceRange();
+
+ SourceLocation End = getLocForEndOfToken(TokenRange.getEnd(), 0, SM,LangOpts);
+ if (End.isInvalid())
+ return CharSourceRange();
+
+ // Break down the source locations.
+ std::pair<FileID, unsigned> beginInfo = SM.getDecomposedLoc(Begin);
+ unsigned EndOffs;
+ if (!SM.isInFileID(End, beginInfo.first, &EndOffs) ||
+ beginInfo.second > EndOffs)
+ return CharSourceRange();
+
+ return CharSourceRange::getCharRange(Begin, End);
+}
+
StringRef Lexer::getImmediateMacroName(SourceLocation Loc,
const SourceManager &SM,
const LangOptions &LangOpts) {