tests/ui/const-generics/issue-80471.rs

   1 #![feature(adt_const_params)]
   2 //~^ WARN the feature `adt_const_params` is incomplete and may not be safe to use and/or cause compiler crashes [incomplete_features]
   3
   4 #[derive(PartialEq, Eq)]
   5 enum Nat {
   6     Z,
   7     S(Box<Nat>),
   8 }
   9
  10 fn foo<const N: Nat>() {}
  11 //~^ ERROR `Nat` must implement `ConstParamTy` to be used as the type of a const generic parameter
  12
  13 fn main() {}