rust-lang/rust
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Rollup merge of #89001 - jackh726:binder-cleanup, r=nikomatsakis

Browse Source 
Be explicit about using Binder::dummy

This is somewhat of a late followup to the binder refactor PR. It removes `ToPredicate` and `ToPolyTraitImpls` that hide the use of `Binder::dummy`. While this does make code a bit more verbose, it allows us be more careful about where we create binders.

Another alternative here might be to add a new trait `ToBinder` or something with a `dummy()` fn. Which could still allow grepping but allows doing something like `trait_ref.dummy()` (but I also wonder if longer-term, it would be better to be even more explicit with a `bind_with_vars(ty::List::empty())` *but* that's not clear yet.

r? ``@nikomatsakis``
This commit is contained in:
Jubilee
2021-09-24 11:40:11 -07:00
committed by GitHub
parent 2de7f1075f 553f6496f2
commit ee2e97c416
34 changed files with 127 additions and 121 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
compiler/rustc_middle/src/ty/mod.rs
View File

@@ -769,12 +769,6 @@ pub trait ToPolyTraitRef<'tcx> {
fn to_poly_trait_ref(&self) -> PolyTraitRef<'tcx>;
}
impl<'tcx> ToPolyTraitRef<'tcx> for TraitRef<'tcx> {
fn to_poly_trait_ref(&self) -> PolyTraitRef<'tcx> {
ty::Binder::dummy(*self)
}
}
impl<'tcx> ToPolyTraitRef<'tcx> for PolyTraitPredicate<'tcx> {
fn to_poly_trait_ref(&self) -> PolyTraitRef<'tcx> {
self.map_bound_ref(|trait_pred| trait_pred.trait_ref)
@@ -792,23 +786,6 @@ impl ToPredicate<'tcx> for Binder<'tcx, PredicateKind<'tcx>> {
}
}
impl ToPredicate<'tcx> for PredicateKind<'tcx> {
#[inline(always)]
fn to_predicate(self, tcx: TyCtxt<'tcx>) -> Predicate<'tcx> {
tcx.mk_predicate(Binder::dummy(self))
}
}
impl<'tcx> ToPredicate<'tcx> for ConstnessAnd<TraitRef<'tcx>> {
fn to_predicate(self, tcx: TyCtxt<'tcx>) -> Predicate<'tcx> {
PredicateKind::Trait(ty::TraitPredicate {
trait_ref: self.value,
constness: self.constness,
})
.to_predicate(tcx)
}
}
impl<'tcx> ToPredicate<'tcx> for ConstnessAnd<PolyTraitRef<'tcx>> {
fn to_predicate(self, tcx: TyCtxt<'tcx>) -> Predicate<'tcx> {
self.value