Move the 'find macro by spelling' infrastructure to the Preprocessor class and
use it to suggest appropriate macro for __attribute__((deprecated)) in
-Wdocumentation-deprecated-sync.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164892 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/Preprocessor.cpp b/lib/Lex/Preprocessor.cpp
index 872cda3..a0fc265 100644
--- a/lib/Lex/Preprocessor.cpp
+++ b/lib/Lex/Preprocessor.cpp
@@ -285,6 +285,39 @@
return Macros.end();
}
+/// \brief Compares macro tokens with a specified token value sequence.
+static bool MacroDefinitionEquals(const MacroInfo *MI,
+ llvm::ArrayRef<TokenValue> Tokens) {
+ return Tokens.size() == MI->getNumTokens() &&
+ std::equal(Tokens.begin(), Tokens.end(), MI->tokens_begin());
+}
+
+StringRef Preprocessor::getLastMacroWithSpelling(
+ SourceLocation Loc,
+ ArrayRef<TokenValue> Tokens) const {
+ SourceLocation BestLocation;
+ StringRef BestSpelling;
+ for (Preprocessor::macro_iterator I = macro_begin(), E = macro_end();
+ I != E; ++I) {
+ if (!I->second->isObjectLike())
+ continue;
+ const MacroInfo *MI = I->second->findDefinitionAtLoc(Loc, SourceMgr);
+ if (!MI)
+ continue;
+ if (!MacroDefinitionEquals(MI, Tokens))
+ continue;
+ SourceLocation Location = I->second->getDefinitionLoc();
+ // Choose the macro defined latest.
+ if (BestLocation.isInvalid() ||
+ (Location.isValid() &&
+ SourceMgr.isBeforeInTranslationUnit(BestLocation, Location))) {
+ BestLocation = Location;
+ BestSpelling = I->first->getName();
+ }
+ }
+ return BestSpelling;
+}
+
void Preprocessor::recomputeCurLexerKind() {
if (CurLexer)
CurLexerKind = CLK_Lexer;