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perf(derive): Stop generating redundant code

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Ed Page 2022-09-01 13:50:27 -05:00
parent a47462123c
commit 6e8b366107
1 changed files with 5 additions and 17 deletions
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22
clap_derive/src/derives/subcommand.rs
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@ -550,23 +550,11 @@ fn gen_update_from_arg_matches(
let variant_name = &variant.ident;
let (pattern, updater) = match variant.fields {
Named(ref fields) => {
let (fields, update): (Vec<_>, Vec<_>) = fields
.named
.iter()
.map(|field| {
let item = Item::from_args_field(
field,
parent_item.casing(),
parent_item.env_casing(),
);
let field_name = field.ident.as_ref().unwrap();
(
quote!( ref mut #field_name ),
args::gen_updater(&fields.named, &item, false),
)
})
.unzip();
(quote!( { #( #fields, )* }), quote!( { #( #update )* } ))
let field_names = fields.named.iter().map(|field| {
field.ident.as_ref().unwrap()
}).collect::<Vec<_>>();
let update = args::gen_updater(&fields.named, item, false);
(quote!( { #( #field_names, )* }), quote!( { #update } ))
}
Unit => (quote!(), quote!({})),
Unnamed(ref fields) => {