associated-const-type-parameter-arrays.rs

// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.


pub trait Foo {
    const Y: usize;
}

struct Abc;
impl Foo for Abc {
    const Y: usize = 8;
}

struct Def;
impl Foo for Def {
    const Y: usize = 33;
}

pub fn test<A: Foo, B: Foo>() {
    let _array: [u32; <A as Foo>::Y];
    //~^ ERROR the trait bound `A: Foo` is not satisfied [E0277]
}

fn main() {
}