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misc: destruct args directly

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avoids bounds checks
This commit is contained in:
Ada Alakbarova
2025-08-19 23:46:47 +02:00
parent abb89608af
commit e6833462eb
1 changed files with 6 additions and 6 deletions
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clippy_utils/src/higher.rs
+6 -6
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@@ -288,14 +288,14 @@ pub fn hir(cx: &LateContext<'_>, expr: &'a Expr<'_>) -> Option<VecArgs<'a>> {
&& is_expn_of(fun.span, sym::vec).is_some()
&& let Some(fun_def_id) = cx.qpath_res(qpath, fun.hir_id).opt_def_id()
{
return match (cx.tcx.get_diagnostic_name(fun_def_id), args.len()) {
(Some(sym::vec_from_elem), 2) => {
return match (cx.tcx.get_diagnostic_name(fun_def_id), args) {
(Some(sym::vec_from_elem), [elem, size]) => {
// `vec![elem; size]` case
Some(VecArgs::Repeat(&args[0], &args[1]))
Some(VecArgs::Repeat(elem, size))
},
(Some(sym::slice_into_vec), 1) => {
(Some(sym::slice_into_vec), [slice]) => {
// `vec![a, b, c]` case
if let ExprKind::Call(_, [arg]) = &args[0].kind
if let ExprKind::Call(_, [arg]) = slice.kind
&& let ExprKind::Array(args) = arg.kind
{
Some(VecArgs::Vec(args))
@@ -303,7 +303,7 @@ pub fn hir(cx: &LateContext<'_>, expr: &'a Expr<'_>) -> Option<VecArgs<'a>> {
None
}
},
(Some(sym::vec_new), 0) => Some(VecArgs::Vec(&[])),
(Some(sym::vec_new), []) => Some(VecArgs::Vec(&[])),
_ => None,
};
}