vi.construct(|_, index| {
let bind = &bindings[index];
quote! {
- ::rustc_middle::ty::fold::TypeFoldable::fold_with(#bind, __folder)
+ ::rustc_middle::ty::fold::TypeFoldable::try_fold_with(#bind, __folder)?
}
})
});
s.bound_impl(
quote!(::rustc_middle::ty::fold::TypeFoldable<'tcx>),
quote! {
- fn super_fold_with<__F: ::rustc_middle::ty::fold::TypeFolder<'tcx>>(
+ fn try_super_fold_with<__F: ::rustc_middle::ty::fold::FallibleTypeFolder<'tcx>>(
self,
__folder: &mut __F
- ) -> Self {
- match self { #body_fold }
+ ) -> Result<Self, __F::Error> {
+ Ok(match self { #body_fold })
}
fn super_visit_with<__F: ::rustc_middle::ty::fold::TypeVisitor<'tcx>>(