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Teach typeck/borrowck/solvers how to deal with async closures

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This commit is contained in:
Michael Goulet 2024-01-24 22:27:25 +00:00
parent c567eddec2
commit a82bae2172
35 changed files with 1221 additions and 66 deletions
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18
compiler/rustc_trait_selection/src/solve/assembly/mod.rs
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@ -182,6 +182,20 @@ pub(super) trait GoalKind<'tcx>:
kind: ty::ClosureKind,
) -> QueryResult<'tcx>;
/// An async closure is known to implement the `AsyncFn<A>` family of traits
/// where `A` is given by the signature of the type.
fn consider_builtin_async_fn_trait_candidates(
ecx: &mut EvalCtxt<'_, 'tcx>,
goal: Goal<'tcx, Self>,
kind: ty::ClosureKind,
) -> QueryResult<'tcx>;
/// TODO:
fn consider_builtin_async_fn_kind_helper_candidate(
ecx: &mut EvalCtxt<'_, 'tcx>,
goal: Goal<'tcx, Self>,
) -> QueryResult<'tcx>;
/// `Tuple` is implemented if the `Self` type is a tuple.
fn consider_builtin_tuple_candidate(
ecx: &mut EvalCtxt<'_, 'tcx>,
@ -461,6 +475,10 @@ impl<'tcx> EvalCtxt<'_, 'tcx> {
G::consider_builtin_fn_ptr_trait_candidate(self, goal)
} else if let Some(kind) = self.tcx().fn_trait_kind_from_def_id(trait_def_id) {
G::consider_builtin_fn_trait_candidates(self, goal, kind)
} else if let Some(kind) = self.tcx().async_fn_trait_kind_from_def_id(trait_def_id) {
G::consider_builtin_async_fn_trait_candidates(self, goal, kind)
} else if lang_items.async_fn_kind_helper() == Some(trait_def_id) {
G::consider_builtin_async_fn_kind_helper_candidate(self, goal)
} else if lang_items.tuple_trait() == Some(trait_def_id) {
G::consider_builtin_tuple_candidate(self, goal)
} else if lang_items.pointee_trait() == Some(trait_def_id) {