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fmt

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Deadbeef 2021-09-02 09:02:19 +00:00
parent 4eab5c1f7b
commit f0a52128ee
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3 changed files with 20 additions and 21 deletions
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37
compiler/rustc_trait_selection/src/traits/select/mod.rs
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@ -1087,26 +1087,25 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
let tcx = self.tcx();
// Respect const trait obligations
if self.is_trait_predicate_const(obligation.predicate.skip_binder()) {
match candidate {
// const impl
ImplCandidate(def_id)
if tcx.impl_constness(def_id) == hir::Constness::Const => {}
// const param
ParamCandidate(ty::ConstnessAnd {
constness: ty::BoundConstness::ConstIfConst,
..
}) => {}
// auto trait impl
AutoImplCandidate(..) => {}
// generator, this will raise error in other places
// or ignore error with const_async_blocks feature
GeneratorCandidate => {}
ConstDropCandidate => {}
_ => {
// reject all other types of candidates
return Err(Unimplemented);
}
match candidate {
// const impl
ImplCandidate(def_id) if tcx.impl_constness(def_id) == hir::Constness::Const => {}
// const param
ParamCandidate(ty::ConstnessAnd {
constness: ty::BoundConstness::ConstIfConst,
..
}) => {}
// auto trait impl
AutoImplCandidate(..) => {}
// generator, this will raise error in other places
// or ignore error with const_async_blocks feature
GeneratorCandidate => {}
ConstDropCandidate => {}
_ => {
// reject all other types of candidates
return Err(Unimplemented);
}
}
}
// Treat negative impls as unimplemented, and reservation impls as ambiguity.
if let ImplCandidate(def_id) = candidate {