bjoernager/rust
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Remove even more redundant builtin candidates

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This commit is contained in:
Michael Goulet 2023-06-16 02:10:10 +00:00
parent 2835d9d1d3
commit d97d4ebecc
6 changed files with 96 additions and 138 deletions
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34
compiler/rustc_trait_selection/src/traits/project.rs
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@ -1717,11 +1717,7 @@ fn assemble_candidates_from_impls<'cx, 'tcx>(
};
let eligible = match &impl_source {
super::ImplSource::Closure(_)
| super::ImplSource::Generator(_)
| super::ImplSource::Future(_)
| super::ImplSource::FnPointer(_)
| super::ImplSource::TraitAlias(_) => true,
super::ImplSource::TraitAlias(_) => true,
super::ImplSource::UserDefined(impl_data) => {
// We have to be careful when projecting out of an
// impl because of specialization. If we are not in
@ -1779,7 +1775,11 @@ fn assemble_candidates_from_impls<'cx, 'tcx>(
let self_ty = selcx.infcx.shallow_resolve(obligation.predicate.self_ty());
let lang_items = selcx.tcx().lang_items();
if lang_items.discriminant_kind_trait() == Some(poly_trait_ref.def_id()) {
if [lang_items.gen_trait(), lang_items.future_trait()].contains(&Some(poly_trait_ref.def_id()))
|| selcx.tcx().fn_trait_kind_from_def_id(poly_trait_ref.def_id()).is_some()
{
true
} else if lang_items.discriminant_kind_trait() == Some(poly_trait_ref.def_id()) {
match self_ty.kind() {
ty::Bool
| ty::Char
@ -1990,11 +1990,23 @@ fn confirm_select_candidate<'cx, 'tcx>(
) -> Progress<'tcx> {
match impl_source {
super::ImplSource::UserDefined(data) => confirm_impl_candidate(selcx, obligation, data),
super::ImplSource::Generator(data) => confirm_generator_candidate(selcx, obligation, data),
super::ImplSource::Future(data) => confirm_future_candidate(selcx, obligation, data),
super::ImplSource::Closure(data) => confirm_closure_candidate(selcx, obligation, data),
super::ImplSource::FnPointer(data) => confirm_fn_pointer_candidate(selcx, obligation, data),
super::ImplSource::Builtin(data) => confirm_builtin_candidate(selcx, obligation, data),
super::ImplSource::Builtin(data) => {
let trait_def_id = obligation.predicate.trait_def_id(selcx.tcx());
let lang_items = selcx.tcx().lang_items();
if lang_items.gen_trait() == Some(trait_def_id) {
confirm_generator_candidate(selcx, obligation, data)
} else if lang_items.future_trait() == Some(trait_def_id) {
confirm_future_candidate(selcx, obligation, data)
} else if selcx.tcx().fn_trait_kind_from_def_id(trait_def_id).is_some() {
if obligation.predicate.self_ty().is_closure() {
confirm_closure_candidate(selcx, obligation, data)
} else {
confirm_fn_pointer_candidate(selcx, obligation, data)
}
} else {
confirm_builtin_candidate(selcx, obligation, data)
}
}
super::ImplSource::Object(_)
| super::ImplSource::Param(..)
| super::ImplSource::TraitUpcasting(_)