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More comments, final tweaks

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This commit is contained in:
Michael Goulet 2024-01-25 19:17:21 +00:00
parent 37184e86ea
commit c98d6994a3
20 changed files with 169 additions and 42 deletions
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7
compiler/rustc_ty_utils/src/instance.rs
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@ -287,6 +287,13 @@ fn resolve_associated_item<'tcx>(
{
match *rcvr_args.type_at(0).kind() {
ty::CoroutineClosure(coroutine_closure_def_id, args) => {
// If we're computing `AsyncFnOnce`/`AsyncFnMut` for a by-ref closure,
// or `AsyncFnOnce` for a by-mut closure, then construct a new body that
// has the right return types.
//
// Specifically, `AsyncFnMut` for a by-ref coroutine-closure just needs
// to have its input and output types fixed (`&mut self` and returning
// `i16` coroutine kind).
if target_kind > args.as_coroutine_closure().kind() {
Some(Instance {
def: ty::InstanceDef::ConstructCoroutineInClosureShim {