lexy doesn't compile in Visual Studio 2022 about lexy HOT 1 CLOSED

The error message isn't great, but it's not a compiler bug:

• dsl::must(...) isn't a rule, so can't be composed with one. Instead, it must be used in the form dsl::must(...).error<my_error>: https://lexy.foonathan.net/reference/dsl/error/#must
• dsl::identifier() expects a character class, not another rule: https://lexy.foonathan.net/reference/dsl/identifier/#identifier
• you don't actually create a production: the rule must be part of a type with a rule and value member.
• This isn't an error, but you don't actually need dsl::must in lexy in 99% of situations (and it does something completely different from pegtl::must, maybe the name isn't ideal). Backtracking in lexy is controlled via >>.

I don't think your PEGTL grammar works, but this is code that parses a function declaration, maybe that helps: https://lexy.foonathan.net/playground/?id=dGGWMn37z&mode=tree

from lexy.