Accept type parameters on grammar (e.g. lifetimes) (Fixes #220) #254
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This allows the parser to operate over types like
Token<'code>
by supplying the lifetime as a type parameter on the grammar (#220):This should work with all type parameters, not just lifetimes, but lifetimes are the motivating example here.
Like @kevinmehall's comment on #220 suggests, this simply adds
rust_ty_params()
topeg_grammar
in the meta-grammar, and then threads that through.If a rule defines it's own type parameters, those come after the grammar's type parameters on the parser's exported functions/entrypoints.