================
@@ -979,3 +979,50 @@ Preprocessor::EvaluateDirectiveExpression(IdentifierInfo
*&IfNDefMacro,
return EvaluateDirectiveExpression(IfNDefMacro, Tok, EvaluatedDefined,
CheckForEoD);
}
+
+static std::optional<CXXStandardLibraryVersionInfo>
+getCXXStandardLibraryVersion(Preprocessor &PP, StringRef MacroName,
+ CXXStandardLibraryVersionInfo::Library Lib) {
+ MacroInfo *Macro = PP.getMacroInfo(PP.getIdentifierInfo(MacroName));
+
+ if (!Macro || Macro->getNumTokens() != 1)
+ return std::nullopt;
+
+ const Token &RevisionDateTok = Macro->getReplacementToken(0);
+
+ bool Invalid = false;
+ llvm::SmallVector<char, 10> Buffer;
+ llvm::StringRef RevisionDate =
+ PP.getSpelling(RevisionDateTok, Buffer, &Invalid);
+ if (!Invalid) {
+ unsigned Value;
+ // We don't use NumericParser to avoid diagnostics
+ if (!RevisionDate.consumeInteger(10, Value))
+ return CXXStandardLibraryVersionInfo{
+ CXXStandardLibraryVersionInfo::LibStdCXX, Value};
----------------
erichkeane wrote:
So it seems weird to me that the `macro name` is sent to this function, and
thus could be basically anything, but we set this always to `LibStdCXX`. It
seems to me that the 1st part of this should be `Lib`, right?
https://github.com/llvm/llvm-project/pull/141977
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