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Deeply check that method signatures match, and allow for nested RPITITs

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This commit is contained in:
Michael Goulet
2022-09-02 21:02:59 +00:00
parent 1f03edeabe
commit cdf78073c5
13 changed files with 231 additions and 52 deletions
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8
compiler/rustc_middle/src/ty/mod.rs
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@@ -2484,6 +2484,14 @@ impl<'tcx> TyCtxt<'tcx> {
pub fn is_const_default_method(self, def_id: DefId) -> bool {
matches!(self.trait_of_item(def_id), Some(trait_id) if self.has_attr(trait_id, sym::const_trait))
}
pub fn impl_trait_in_trait_parent(self, mut def_id: DefId) -> DefId {
while let def_kind = self.def_kind(def_id) && def_kind != DefKind::AssocFn {
debug_assert_eq!(def_kind, DefKind::ImplTraitPlaceholder);
def_id = self.parent(def_id);
}
def_id
}
}
/// Yields the parent function's `LocalDefId` if `def_id` is an `impl Trait` definition.