diff options
Diffstat (limited to 'compiler/rustc_trait_selection/src/traits/fulfill.rs')
| -rw-r--r-- | compiler/rustc_trait_selection/src/traits/fulfill.rs | 73 |
1 files changed, 36 insertions, 37 deletions
diff --git a/compiler/rustc_trait_selection/src/traits/fulfill.rs b/compiler/rustc_trait_selection/src/traits/fulfill.rs index cf9d9315f..3ebf1246a 100644 --- a/compiler/rustc_trait_selection/src/traits/fulfill.rs +++ b/compiler/rustc_trait_selection/src/traits/fulfill.rs @@ -8,7 +8,7 @@ use rustc_infer::traits::{PolyTraitObligation, SelectionError, TraitEngine}; use rustc_middle::mir::interpret::ErrorHandled; use rustc_middle::ty::abstract_const::NotConstEvaluatable; use rustc_middle::ty::error::{ExpectedFound, TypeError}; -use rustc_middle::ty::subst::SubstsRef; +use rustc_middle::ty::GenericArgsRef; use rustc_middle::ty::{self, Binder, Const, TypeVisitableExt}; use std::marker::PhantomData; @@ -410,8 +410,8 @@ impl<'a, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'tcx> { } } - ty::PredicateKind::ClosureKind(_, closure_substs, kind) => { - match self.selcx.infcx.closure_kind(closure_substs) { + ty::PredicateKind::ClosureKind(_, closure_args, kind) => { + match self.selcx.infcx.closure_kind(closure_args) { Some(closure_kind) => { if closure_kind.extends(kind) { ProcessResult::Changed(vec![]) @@ -536,7 +536,7 @@ impl<'a, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'tcx> { if let Ok(new_obligations) = infcx .at(&obligation.cause, obligation.param_env) .trace(c1, c2) - .eq(DefineOpaqueTypes::No, a.substs, b.substs) + .eq(DefineOpaqueTypes::No, a.args, b.args) { return ProcessResult::Changed(mk_pending( new_obligations.into_obligations(), @@ -559,31 +559,30 @@ impl<'a, 'tcx> ObligationProcessor for FulfillProcessor<'a, 'tcx> { let stalled_on = &mut pending_obligation.stalled_on; - let mut evaluate = |c: Const<'tcx>| { - if let ty::ConstKind::Unevaluated(unevaluated) = c.kind() { - match self.selcx.infcx.try_const_eval_resolve( - obligation.param_env, - unevaluated, - c.ty(), - Some(obligation.cause.span), - ) { - Ok(val) => Ok(val), - Err(e) => match e { - ErrorHandled::TooGeneric => { - stalled_on.extend( - unevaluated.substs.iter().filter_map( + let mut evaluate = + |c: Const<'tcx>| { + if let ty::ConstKind::Unevaluated(unevaluated) = c.kind() { + match self.selcx.infcx.try_const_eval_resolve( + obligation.param_env, + unevaluated, + c.ty(), + Some(obligation.cause.span), + ) { + Ok(val) => Ok(val), + Err(e) => match e { + ErrorHandled::TooGeneric => { + stalled_on.extend(unevaluated.args.iter().filter_map( TyOrConstInferVar::maybe_from_generic_arg, - ), - ); - Err(ErrorHandled::TooGeneric) - } - _ => Err(e), - }, + )); + Err(ErrorHandled::TooGeneric) + } + _ => Err(e), + }, + } + } else { + Ok(c) } - } else { - Ok(c) - } - }; + }; match (evaluate(c1), evaluate(c2)) { (Ok(c1), Ok(c2)) => { @@ -671,7 +670,7 @@ impl<'a, 'tcx> FulfillProcessor<'a, 'tcx> { stalled_on: &mut Vec<TyOrConstInferVar<'tcx>>, ) -> ProcessResult<PendingPredicateObligation<'tcx>, FulfillmentErrorCode<'tcx>> { let infcx = self.selcx.infcx; - if obligation.predicate.is_global() { + if obligation.predicate.is_global() && !self.selcx.is_intercrate() { // no type variables present, can use evaluation for better caching. // FIXME: consider caching errors too. if infcx.predicate_must_hold_considering_regions(obligation) { @@ -696,9 +695,9 @@ impl<'a, 'tcx> FulfillProcessor<'a, 'tcx> { // trait selection is because we don't have enough // information about the types in the trait. stalled_on.clear(); - stalled_on.extend(substs_infer_vars( + stalled_on.extend(args_infer_vars( &self.selcx, - trait_obligation.predicate.map_bound(|pred| pred.trait_ref.substs), + trait_obligation.predicate.map_bound(|pred| pred.trait_ref.args), )); debug!( @@ -725,7 +724,7 @@ impl<'a, 'tcx> FulfillProcessor<'a, 'tcx> { ) -> ProcessResult<PendingPredicateObligation<'tcx>, FulfillmentErrorCode<'tcx>> { let tcx = self.selcx.tcx(); - if obligation.predicate.is_global() { + if obligation.predicate.is_global() && !self.selcx.is_intercrate() { // no type variables present, can use evaluation for better caching. // FIXME: consider caching errors too. if self.selcx.infcx.predicate_must_hold_considering_regions(obligation) { @@ -753,9 +752,9 @@ impl<'a, 'tcx> FulfillProcessor<'a, 'tcx> { ProjectAndUnifyResult::Holds(os) => ProcessResult::Changed(mk_pending(os)), ProjectAndUnifyResult::FailedNormalization => { stalled_on.clear(); - stalled_on.extend(substs_infer_vars( + stalled_on.extend(args_infer_vars( &self.selcx, - project_obligation.predicate.map_bound(|pred| pred.projection_ty.substs), + project_obligation.predicate.map_bound(|pred| pred.projection_ty.args), )); ProcessResult::Unchanged } @@ -770,14 +769,14 @@ impl<'a, 'tcx> FulfillProcessor<'a, 'tcx> { } } -/// Returns the set of inference variables contained in `substs`. -fn substs_infer_vars<'a, 'tcx>( +/// Returns the set of inference variables contained in `args`. +fn args_infer_vars<'a, 'tcx>( selcx: &SelectionContext<'a, 'tcx>, - substs: ty::Binder<'tcx, SubstsRef<'tcx>>, + args: ty::Binder<'tcx, GenericArgsRef<'tcx>>, ) -> impl Iterator<Item = TyOrConstInferVar<'tcx>> { selcx .infcx - .resolve_vars_if_possible(substs) + .resolve_vars_if_possible(args) .skip_binder() // ok because this check doesn't care about regions .iter() .filter(|arg| arg.has_non_region_infer()) |