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Directly collect into ty_param_names instead of peeking to see if empty

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This commit is contained in:
David Tolnay 2023-10-22 12:08:20 -07:00
parent bd2b53ba6d
commit 45363f11ef
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1 changed files with 4 additions and 6 deletions
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10
compiler/rustc_builtin_macros/src/deriving/generic/mod.rs
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@ -695,15 +695,13 @@ impl<'a> TraitDef<'a> {
} }
})); }));
let mut ty_params = params let ty_param_names: Vec<Symbol> = params
.iter() .iter()
.filter(|param| matches!(param.kind, ast::GenericParamKind::Type { .. })) .filter(|param| matches!(param.kind, ast::GenericParamKind::Type { .. }))
.peekable(); .map(|ty_param| ty_param.ident.name)
.collect();
if ty_params.peek().is_some() {
let ty_param_names: Vec<Symbol> =
ty_params.map(|ty_param| ty_param.ident.name).collect();
if !ty_param_names.is_empty() {
for field_ty in field_tys { for field_ty in field_tys {
let field_ty_params = find_type_parameters(&field_ty, &ty_param_names, cx); let field_ty_params = find_type_parameters(&field_ty, &ty_param_names, cx);