Function rustc_hir_analysis::check::wfcheck::receiver_is_valid
source ยท fn receiver_is_valid<'tcx>(
wfcx: &WfCheckingCtxt<'_, 'tcx>,
span: Span,
receiver_ty: Ty<'tcx>,
self_ty: Ty<'tcx>,
arbitrary_self_types_enabled: bool,
) -> bool
Expand description
Returns whether receiver_ty
would be considered a valid receiver type for self_ty
. If
arbitrary_self_types
is enabled, receiver_ty
must transitively deref to self_ty
, possibly
through a *const/mut T
raw pointer. If the feature is not enabled, the requirements are more
strict: receiver_ty
must implement Receiver
and directly implement
Deref<Target = self_ty>
.
N.B., there are cases this function returns true
but causes an error to be emitted,
particularly when receiver_ty
derefs to a type that is the same as self_ty
but has the
wrong lifetime. Be careful of this if you are calling this function speculatively.