diff options
Diffstat (limited to 'compiler/rustc_trait_selection/src')
| -rw-r--r-- | compiler/rustc_trait_selection/src/traits/select/mod.rs | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/compiler/rustc_trait_selection/src/traits/select/mod.rs b/compiler/rustc_trait_selection/src/traits/select/mod.rs index c007cd5314a..699c05466bd 100644 --- a/compiler/rustc_trait_selection/src/traits/select/mod.rs +++ b/compiler/rustc_trait_selection/src/traits/select/mod.rs @@ -2262,8 +2262,21 @@ impl<'tcx> SelectionContext<'_, 'tcx> { } } - // FIXME(async_closures): These are never clone, for now. - ty::CoroutineClosure(_, _) => None, + ty::CoroutineClosure(_, args) => { + // (*) binder moved here + let ty = self.infcx.shallow_resolve(args.as_coroutine_closure().tupled_upvars_ty()); + if let ty::Infer(ty::TyVar(_)) = ty.kind() { + // Not yet resolved. + Ambiguous + } else { + Where( + obligation + .predicate + .rebind(args.as_coroutine_closure().upvar_tys().to_vec()), + ) + } + } + // `Copy` and `Clone` are automatically implemented for an anonymous adt // if all of its fields are `Copy` and `Clone` ty::Adt(adt, args) if adt.is_anonymous() => { |