bjoernager/rust
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This commit is contained in:
Bastian Kauschke 2020-10-21 23:52:41 +02:00
parent 8752a560b9
commit 17825c93ff
2 changed files with 6 additions and 21 deletions
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6
compiler/rustc_middle/src/ty/structural_impls.rs
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@ -333,16 +333,14 @@ CloneTypeFoldableAndLiftImpls! {
impl<'tcx, A: Lift<'tcx>, B: Lift<'tcx>> Lift<'tcx> for (A, B) {
type Lifted = (A::Lifted, B::Lifted);
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
let (a, b) = self;
tcx.lift(a).and_then(|a| tcx.lift(b).map(|b| (a, b)))
Some((tcx.lift(self.0)?, tcx.lift(self.1)?))
}
}
impl<'tcx, A: Lift<'tcx>, B: Lift<'tcx>, C: Lift<'tcx>> Lift<'tcx> for (A, B, C) {
type Lifted = (A::Lifted, B::Lifted, C::Lifted);
fn lift_to_tcx(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted> {
let (a, b, c) = self;
tcx.lift(a).and_then(|a| tcx.lift(b).and_then(|b| tcx.lift(c).map(|c| (a, b, c))))
Some((tcx.lift(self.0)?, tcx.lift(self.1)?, tcx.lift(self.2)?))
}
}