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Remove trait_of_item query.

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This commit is contained in:
Camille GILLOT
2022-03-13 00:58:21 +01:00
parent d7ea161b7e
commit 957548183d
10 changed files with 25 additions and 36 deletions
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21
compiler/rustc_middle/src/ty/mod.rs
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@@ -2191,10 +2191,29 @@ impl<'tcx> TyCtxt<'tcx> {
self.impl_trait_ref(def_id).map(|tr| tr.def_id)
}
/// If the given `DefId` describes an item belonging to a trait,
/// returns the `DefId` of the trait that the trait item belongs to;
/// otherwise, returns `None`.
pub fn trait_of_item(self, def_id: DefId) -> Option<DefId> {
if let DefKind::AssocConst | DefKind::AssocFn | DefKind::AssocTy = self.def_kind(def_id) {
let parent = self.parent(def_id);
if let DefKind::Trait | DefKind::TraitAlias = self.def_kind(parent) {
return Some(parent);
}
}
None
}
/// If the given `DefId` describes a method belonging to an impl, returns the
/// `DefId` of the impl that the method belongs to; otherwise, returns `None`.
pub fn impl_of_method(self, def_id: DefId) -> Option<DefId> {
self.opt_associated_item(def_id).and_then(|trait_item| trait_item.impl_container(self))
if let DefKind::AssocConst | DefKind::AssocFn | DefKind::AssocTy = self.def_kind(def_id) {
let parent = self.parent(def_id);
if let DefKind::Impl = self.def_kind(parent) {
return Some(parent);
}
}
None
}
/// If the given `DefId` belongs to a trait that was automatically derived, returns `true`.