[clang] [clang][Diagnostics] Highlight code snippets (PR #66514)

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In-Reply-To: <llvm/llvm-project/pull/66514/clang at github.com>


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@@ -887,6 +906,9 @@ void Preprocessor::Lex(Token &Result) {
     switch (CurLexerKind) {
     case CLK_Lexer:
       ReturnedToken = CurLexer->Lex(Result);
+      if (ReturnedToken && CurLexer &&
+          CurLexer->getFileID() == SourceMgr.getMainFileID())
+        saveCheckPoint(CurLexer->BufferPtr);
----------------
cor3ntin wrote:

> The check for CurLexer is needed in case the call to Lex above unsets it.

That can happen? gnarly.

https://github.com/llvm/llvm-project/pull/66514