50 lines
1.4 KiB
Rust
50 lines
1.4 KiB
Rust
|
// 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.
|
||
|
|
|
||
|
|
const CONST_REF: &[u8; 3] = b"foo";
|
||
|
|
|
||
|
|
trait Foo {
|
||
|
|
const CONST_REF_DEFAULT: &'static [u8; 3] = b"bar";
|
||
|
|
const CONST_REF: &'static [u8; 3];
|
||
|
|
}
|
||
|
|
|
||
|
|
impl Foo for i32 {
|
||
|
|
const CONST_REF: &'static [u8; 3] = b"jjj";
|
||
|
|
}
|
||
|
|
|
||
|
|
impl Foo for i64 {
|
||
|
|
const CONST_REF_DEFAULT: &'static [u8; 3] = b"ggg";
|
||
|
|
const CONST_REF: &'static [u8; 3] = b"fff";
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check that (associated and free) const references are not mistaken for a
|
||
|
|
// non-reference pattern (in which case they would be auto-dereferenced, making
|
||
|
|
// the types mismatched).
|
||
|
|
|
||
|
|
fn const_ref() -> bool {
|
||
|
|
let f = b"foo";
|
||
|
|
match f {
|
||
|
|
CONST_REF => true,
|
||
|
|
_ => false,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
fn associated_const_ref() -> bool {
|
||
|
|
match (b"bar", b"jjj", b"ggg", b"fff") {
|
||
|
|
(i32::CONST_REF_DEFAULT, i32::CONST_REF, i64::CONST_REF_DEFAULT, i64::CONST_REF) => true,
|
||
|
|
_ => false,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn main() {
|
||
|
|
assert!(const_ref());
|
||
|
|
assert!(associated_const_ref());
|
||
|
|
}
|