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Fix PartialEq args when #[const_trait] is enabled

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This commit is contained in:
Michael Goulet 2023-11-27 16:05:48 +00:00
parent 5facb422f8
commit 82a9e872d8
5 changed files with 56 additions and 37 deletions
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34
compiler/rustc_middle/src/ty/util.rs
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@ -779,6 +779,40 @@ impl<'tcx> TyCtxt<'tcx> {
// the language.
|| self.extern_crate(key.as_def_id()).is_some_and(|e| e.is_direct())
}
pub fn expected_const_effect_param_for_body(self, def_id: LocalDefId) -> ty::Const<'tcx> {
// if the callee does have the param, we need to equate the param to some const
// value no matter whether the effects feature is enabled in the local crate,
// because inference will fail if we don't.
let mut host_always_on =
!self.features().effects || self.sess.opts.unstable_opts.unleash_the_miri_inside_of_you;
// Compute the constness required by the context.
let const_context = self.hir().body_const_context(def_id);
let kind = self.def_kind(def_id);
debug_assert_ne!(kind, DefKind::ConstParam);
if self.has_attr(def_id, sym::rustc_do_not_const_check) {
trace!("do not const check this context");
host_always_on = true;
}
match const_context {
_ if host_always_on => self.consts.true_,
Some(hir::ConstContext::Static(_) | hir::ConstContext::Const { .. }) => {
self.consts.false_
}
Some(hir::ConstContext::ConstFn) => {
let host_idx = self
.generics_of(def_id)
.host_effect_index
.expect("ConstContext::Maybe must have host effect param");
ty::GenericArgs::identity_for_item(self, def_id).const_at(host_idx)
}
None => self.consts.true_,
}
}
}
struct OpaqueTypeExpander<'tcx> {