fields.members() for darling::ast::Fields<T>

[Bleachfuel]

add a .members() function to darling::ast::Fields<T> that works like syn::Fields::members(). this is useful for not having to match on whether its named, unnamed or a unit struct

[TedDriggs]

To do this, we'd need to figure out how one gets from a T to a syn::Member. T is not obliged to preserve the Ident for named fields, so at best we'd need some additional trait bound on the impl block that houses this method.

Could your use-case alternatively be achieved with something like:

fn field_to_member(field: &syn::Field, index: usize) -> syn::Member {
    match field.ident.clone() {
        Some(ident) => ident.into(),
        None => (syn::Index {
            index: index as u32,
            span: field.span(),
        })
        .into(),
    }
}

fn members<'a>(v: &'a Fields<syn::Field>) -> impl 'a + Iterator<Item = syn::Member> {
    v.iter().enumerate().map(|(i, f)| field_to_member(f, i))
}

You can replace syn::Field with the type of your choice, or make it generic over anything that impls AsRef<Ident> and Spanned.

[Bleachfuel]

Yeah, that's nice!

[TedDriggs]

Given the availability of a workaround and the complexities of exposing this as an inherent method on ast::Fields, I'm closing this as "Not planned"