================
@@ -2288,7 +2288,9 @@ class Preprocessor {
/// Determine whether the next preprocessor token to be
/// lexed is a '('. If so, consume the token and return true, if not, this
/// method should have no observable side-effect on the lexed tokens.
- bool isNextPPTokenLParen();
+ bool isNextPPTokenLParen() {
+ return peekNextPPToken().value_or(Token{}).is(tok::l_paren);
----------------
AaronBallman wrote:
The lexer is almost always on the hot path but `Token`s are small... I think it
may be worth verifying that this has no performance difference from an approach
without `value_or`.
https://github.com/llvm/llvm-project/pull/143898
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