bjoernager/rust
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Where bounds are checked on inherent impls

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This commit is contained in:
Santiago Pastorino 2022-03-24 17:47:10 -03:00
parent f4bd1e14bd
commit d96faef913
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GPG key ID: 8131A24E0C79EFAF
3 changed files with 61 additions and 2 deletions
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10
compiler/rustc_trait_selection/src/traits/coherence.rs
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@ -7,7 +7,7 @@
use crate::infer::outlives::env::OutlivesEnvironment;
use crate::infer::{CombinedSnapshot, InferOk, RegionckMode};
use crate::traits::select::IntercrateAmbiguityCause;
use crate::traits::util::impl_trait_ref_and_oblig;
use crate::traits::util::{impl_trait_ref_and_oblig, inherent_impl_and_oblig};
use crate::traits::SkipLeakCheck;
use crate::traits::{
self, FulfillmentContext, Normalized, Obligation, ObligationCause, PredicateObligation,
@ -338,7 +338,13 @@ fn impl_subject_and_obligations<'cx, 'tcx>(
(ImplSubject::Trait(impl2_trait_ref), Box::new(obligations))
} else {
(infcx.tcx.impl_subject(impl2_def_id), Box::new(iter::empty()))
// Attempt to prove that impl2 applies, given all of the above.
let selcx = &mut SelectionContext::new(&infcx);
let impl2_substs = infcx.fresh_substs_for_item(DUMMY_SP, impl2_def_id);
let (impl2_ty, obligations) =
inherent_impl_and_oblig(selcx, impl_env, impl2_def_id, impl2_substs);
(ImplSubject::Inherent(impl2_ty), Box::new(obligations))
}
}