blob: be6a2ed5f88419c3652532c49f4238ae787d7c1d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
// Copyright 2017 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.
// must-compile-successfully
trait Foo {
const AMT: usize;
}
enum Bar<A, B> {
First(A),
Second(B),
}
impl<A: Foo, B: Foo> Foo for Bar<A, B> {
const AMT: usize = [A::AMT][(A::AMT > B::AMT) as usize];
}
impl Foo for u8 {
const AMT: usize = 1;
}
impl Foo for u16 {
const AMT: usize = 2;
}
fn main() {
println!("{}", <Bar<u16, u8> as Foo>::AMT); //~ WARN const_err
//~^ WARN const_err
}
|
