}
}
+fn are_suggestable_generic_args(generic_args: &[hir::GenericArg<'_>]) -> bool {
+ generic_args
+ .iter()
+ .filter_map(|arg| match arg {
+ hir::GenericArg::Type(ty) => Some(ty),
+ _ => None,
+ })
+ .any(is_suggestable_infer_ty)
+}
+
/// Whether `ty` is a type with `_` placeholders that can be infered. Used in diagnostics only to
/// use inference to provide suggestions for the appropriate type if possible.
fn is_suggestable_infer_ty(ty: &hir::Ty<'_>) -> bool {
Slice(ty) | Array(ty, _) => is_suggestable_infer_ty(ty),
Tup(tys) => tys.iter().any(is_suggestable_infer_ty),
Ptr(mut_ty) | Rptr(_, mut_ty) => is_suggestable_infer_ty(mut_ty.ty),
- Def(_, generic_args) => generic_args
- .iter()
- .filter_map(|arg| match arg {
- hir::GenericArg::Type(ty) => Some(ty),
- _ => None,
- })
- .any(is_suggestable_infer_ty),
+ Def(_, generic_args) => are_suggestable_generic_args(generic_args),
+ Path(hir::QPath::TypeRelative(ty, segment)) => {
+ is_suggestable_infer_ty(ty) || are_suggestable_generic_args(segment.generic_args().args)
+ }
+ Path(hir::QPath::Resolved(ty_opt, hir::Path { segments, .. })) => {
+ ty_opt.map_or(false, is_suggestable_infer_ty)
+ || segments
+ .iter()
+ .any(|segment| are_suggestable_generic_args(segment.generic_args().args))
+ }
_ => false,
}
}