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Rollup merge of #105318 - compiler-errors:issue-105304, r=jackh726

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Make `get_impl_future_output_ty` work with AFIT

Fixes #105304
This commit is contained in:
Matthias Krüger 2022-12-06 13:27:44 +01:00 • committed by GitHub
commit e29a510ff0
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3 changed files with 46 additions and 1 deletions
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10
compiler/rustc_infer/src/infer/error_reporting/mod.rs
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@ -341,7 +341,15 @@ pub fn unexpected_hidden_region_diagnostic<'tcx>(
impl<'tcx> InferCtxt<'tcx> {
pub fn get_impl_future_output_ty(&self, ty: Ty<'tcx>) -> Option<Ty<'tcx>> {
let ty::Opaque(def_id, substs) = *ty.kind() else { return None; };
let (def_id, substs) = match *ty.kind() {
ty::Opaque(def_id, substs) => (def_id, substs),
ty::Projection(data)
if self.tcx.def_kind(data.item_def_id) == DefKind::ImplTraitPlaceholder =>
{
(data.item_def_id, data.substs)
}
_ => return None,
};
let future_trait = self.tcx.require_lang_item(LangItem::Future, None);
let item_def_id = self.tcx.associated_item_def_ids(future_trait)[0];