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

introduce a Coerce predicate

Browse Source
This commit is contained in:
Niko Matsakis
2020-11-21 07:06:16 -05:00
committed by Mark Rousskov
parent 5a8edc0b76
commit 947c0de028
24 changed files with 153 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
compiler/rustc_middle/src/ty/structural_impls.rs
View File

@@ -179,6 +179,7 @@ impl fmt::Debug for ty::PredicateKind<'tcx> {
match *self {
ty::PredicateKind::Trait(ref a) => a.fmt(f),
ty::PredicateKind::Subtype(ref pair) => pair.fmt(f),
ty::PredicateKind::Coerce(ref pair) => pair.fmt(f),
ty::PredicateKind::RegionOutlives(ref pair) => pair.fmt(f),
ty::PredicateKind::TypeOutlives(ref pair) => pair.fmt(f),
ty::PredicateKind::Projection(ref pair) => pair.fmt(f),
@@ -380,6 +381,13 @@ impl<'a, 'tcx> Lift<'tcx> for ty::SubtypePredicate<'a> {
}
}
impl<'a, 'tcx> Lift<'tcx> for ty::CoercePredicate<'a> {
type Lifted = ty::CoercePredicate<'tcx>;
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<ty::CoercePredicate<'tcx>> {
tcx.lift((self.a, self.b)).map(|(a, b)| ty::CoercePredicate { a, b })
}
}
impl<'tcx, A: Copy + Lift<'tcx>, B: Copy + Lift<'tcx>> Lift<'tcx> for ty::OutlivesPredicate<A, B> {
type Lifted = ty::OutlivesPredicate<A::Lifted, B::Lifted>;
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
@@ -420,6 +428,7 @@ impl<'a, 'tcx> Lift<'tcx> for ty::PredicateKind<'a> {
match self {
ty::PredicateKind::Trait(data) => tcx.lift(data).map(ty::PredicateKind::Trait),
ty::PredicateKind::Subtype(data) => tcx.lift(data).map(ty::PredicateKind::Subtype),
ty::PredicateKind::Coerce(data) => tcx.lift(data).map(ty::PredicateKind::Coerce),
ty::PredicateKind::RegionOutlives(data) => {
tcx.lift(data).map(ty::PredicateKind::RegionOutlives)
}