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remove trivial calls to mk_const

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This commit is contained in:
Bastian Kauschke 2020-05-31 17:16:44 +02:00
parent 4b1f86adbe
commit 9f83d36edc
1 changed files with 5 additions and 1 deletions
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6
src/librustc_middle/ty/structural_impls.rs
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@ -1019,7 +1019,11 @@ impl<'tcx> TypeFoldable<'tcx> for &'tcx ty::Const<'tcx> {
fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {
let ty = self.ty.fold_with(folder);
let val = self.val.fold_with(folder);
folder.tcx().mk_const(ty::Const { ty, val })
if ty != self.ty || val != self.val {
folder.tcx().mk_const(ty::Const { ty, val })
} else {
*self
}
}
fn fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {