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Auto merge of #87515 - crlf0710:trait_upcasting_part2, r=bjorn3

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Trait upcasting coercion (part2)

This is the second part of trait upcasting coercion implementation.

Currently this is blocked on #86264 .

The third part might be implemented using unsafety checking

r? `@bjorn3`
This commit is contained in:
bors 2021-08-03 16:58:56 +00:00
commit c6bc102fea
22 changed files with 1186 additions and 93 deletions
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10
compiler/rustc_query_impl/src/keys.rs
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@ -282,6 +282,16 @@ impl<'tcx> Key for ty::PolyTraitRef<'tcx> {
}
}
impl<'tcx> Key for (ty::PolyTraitRef<'tcx>, ty::PolyTraitRef<'tcx>) {
#[inline(always)]
fn query_crate_is_local(&self) -> bool {
self.0.def_id().krate == LOCAL_CRATE
}
fn default_span(&self, tcx: TyCtxt<'_>) -> Span {
tcx.def_span(self.0.def_id())
}
}
impl<'tcx> Key for GenericArg<'tcx> {
#[inline(always)]
fn query_crate_is_local(&self) -> bool {