Function extract_ports

flow-derive/src/utils.rs:90–106

(
    data: &syn::Data,
    ty_name: &str,
    f: fn(ExtractParams) -> TokenStream,
)

pub type ExtractParams<'a> = (&'a Ident, &'a Option<Ident>, &'a Type);

pub fn extract_ports(
    data: &syn::Data,
    ty_name: &str,
    f: fn(ExtractParams) -> TokenStream,
) -> Vec<TokenStream> {
    let port_func = lit::ident(ty_name.to_lowercase());
    fields(data)
        .filter(|field| {
            match_last_ty(&field.ty, ty_name)
                || last_inner_ty(&field.ty)
                    .map(|inner_ty| match_last_ty(inner_ty, ty_name))
                    .unwrap_or(false)
        })
        .map(|field| (&port_func, &field.ident, &field.ty))
        .map(f)
        .collect()
}