diff options
Diffstat (limited to 'compiler/rustc_middle/src/ty/instance.rs')
| -rw-r--r-- | compiler/rustc_middle/src/ty/instance.rs | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/ty/instance.rs b/compiler/rustc_middle/src/ty/instance.rs index bbe0915baa2..18ef4ed549b 100644 --- a/compiler/rustc_middle/src/ty/instance.rs +++ b/compiler/rustc_middle/src/ty/instance.rs @@ -95,7 +95,15 @@ pub enum InstanceDef<'tcx> { /// The body generated here differs significantly from the `ClosureOnceShim`, /// since we need to generate a distinct coroutine type that will move the /// closure's upvars *out* of the closure. - ConstructCoroutineInClosureShim { coroutine_closure_def_id: DefId }, + ConstructCoroutineInClosureShim { + coroutine_closure_def_id: DefId, + // Whether the generated MIR body takes the coroutine by-ref. This is + // because the signature of `<{async fn} as FnMut>::call_mut` is: + // `fn(&mut self, args: A) -> <Self as FnOnce>::Output`, that is to say + // that it returns the `FnOnce`-flavored coroutine but takes the closure + // by ref (and similarly for `Fn::call`). + receiver_by_ref: bool, + }, /// `<[coroutine] as Future>::poll`, but for coroutines produced when `AsyncFnOnce` /// is called on a coroutine-closure whose closure kind greater than `FnOnce`, or @@ -188,6 +196,7 @@ impl<'tcx> InstanceDef<'tcx> { | InstanceDef::ClosureOnceShim { call_once: def_id, track_caller: _ } | ty::InstanceDef::ConstructCoroutineInClosureShim { coroutine_closure_def_id: def_id, + receiver_by_ref: _, } | ty::InstanceDef::CoroutineKindShim { coroutine_def_id: def_id } | InstanceDef::DropGlue(def_id, _) |