//@ [full] check-pass //@ revisions: full min #![cfg_attr(full, feature(adt_const_params))] #![cfg_attr(full, allow(incomplete_features))] #[cfg(full)] use std::marker::ConstParamTy; #[derive(PartialEq, Eq)] #[cfg_attr(full, derive(ConstParamTy))] enum IceEnum { Variant } struct IceStruct; impl IceStruct { fn ice_struct_fn() {} //[min]~^ ERROR `IceEnum` is forbidden as the type of a const generic parameter } fn main() { IceStruct::ice_struct_fn::<{IceEnum::Variant}>(); }