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Make TypeFoldable implementors short-circuit on error

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Co-authored-by: Alan Egerton <eggyal@gmail.com>
This commit is contained in:
LeSeulArtichaut
2021-05-19 13:34:54 +02:00
committed by Alan Egerton
parent c5f0d0ebb4
commit 6e3fa20b00
11 changed files with 299 additions and 204 deletions
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7
compiler/rustc_middle/src/ty/mod.rs
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@@ -1260,8 +1260,11 @@ impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for ParamEnv<'tcx> {
}
impl<'tcx> TypeFoldable<'tcx> for ParamEnv<'tcx> {
fn super_fold_with<F: ty::fold::TypeFolder<'tcx>>(self, folder: &mut F) -> Self {
ParamEnv::new(self.caller_bounds().fold_with(folder), self.reveal().fold_with(folder))
fn super_fold_with<F: ty::fold::TypeFolder<'tcx>>(
self,
folder: &mut F,
) -> Result<Self, F::Error> {
Ok(ParamEnv::new(self.caller_bounds().fold_with(folder)?, self.reveal().fold_with(folder)?))
}
fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> ControlFlow<V::BreakTy> {