* My use case involves parsing identifiers that can only contain ASCII lowercase, uppercase, digits and the underscore.
Spirit used to have helpers like this but Parser doesn't seem to have them. I noticed this too but it's actually pretty easy to fill this in yourself. Here's a working example: https://godbolt.org/z/6P6dTbGYY auto const digit = p::char_('0', '9'); auto const lower = p::char_('a', 'z'); auto const upper = p::char_('A', 'Z'); auto const ident = digit | lower | upper | '_';
* I started my evaluation using clang-18 (Linux) but builds fail (seems to happen under all clang versions I tried).
Hmm, I can't actually can't replicate this, btw. I'm using the latest tip of develop here: https://github.com/cmazakas/parser-review/blob/main/overlays/boost-parser/po... Compiles fine for me using clang-17 on Ubuntu 23.10 You should include details about the nature of your build failures. - Christian