Function fields_pat

impl/src/expand.rs:511–524

(fields: &[Field])

}

fn fields_pat(fields: &[Field]) -> TokenStream {
    let mut members = fields.iter().map(|field| &field.member).peekable();
    match members.peek() {
        Some(MemberUnraw::Named(_)) => quote!({ #(#members),* }),
        Some(MemberUnraw::Unnamed(_)) => {
            let vars = members.map(|member| match member {
                MemberUnraw::Unnamed(index) => format_ident!("_{}", index),
                MemberUnraw::Named(_) => unreachable!(),
            });
            quote!((#(#vars),*))
        }
        None => quote!({}),
    }
}

fn use_as_display(needs_as_display: bool) -> Option<TokenStream> {
    if needs_as_display {