Function feature

flow-derive/src/lib.rs:99–102

(input: TokenStream)

#[doc(hidden)]
#[proc_macro]
pub fn feature(input: TokenStream) -> TokenStream {
    let input = parse_macro_input!(input as internal::FeatureDeclare);
    internal::feature_expand(input).into()
}

fn ports_expand(
    prefix: &str,