tests/ui/const-generics/generic_const_exprs/eval-privacy.rs

   1 #![crate_type = "lib"]
   2 #![feature(generic_const_exprs)]
   3 #![allow(incomplete_features)]
   4
   5 pub struct Const<const U: u8>;
   6
   7 pub trait Trait {
   8     type AssocTy;
   9     fn assoc_fn() -> Self::AssocTy;
  10 }
  11
  12 impl<const U: u8> Trait for Const<U> // OK, trait impl predicates
  13 where
  14     Const<{ my_const_fn(U) }>: ,
  15 {
  16     type AssocTy = Const<{ my_const_fn(U) }>;
  17     //~^ ERROR private type
  18     fn assoc_fn() -> Self::AssocTy {
  19         Const
  20     }
  21 }
  22
  23 const fn my_const_fn(val: u8) -> u8 {
  24     // body of this function doesn't matter
  25     val
  26 }