Generic input lifetime for grammar

[PurpleMyst]

Hi, I have a type Tokens<'code> in my code that wants to use rust-peg's parser! proc-macro, however I can't figure out how to do something like the following:

peg::parser! {
    grammar feeny<'a>() for Tokens<'a> {
        // snip
    }
}

Is there a way to do this?

[kevinmehall]

Not currently. There is support for type and lifetime parameters on rules, but not on the grammar as a whole.

Implementing it would take adding rust_ty_params() to the peg_grammar rule in the meta-grammar, and then threading that through to the right places in the output.

[PurpleMyst]

Is this particularly difficult? I'd be willing to do it with a small bit of mentoring