47 lines
1.1 KiB
Rust
47 lines
1.1 KiB
Rust
// Copyright 2014 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.
|
|
|
|
// Test that a custom deref with a fat pointer return type does not ICE
|
|
|
|
#![allow(unknown_features)]
|
|
#![feature(box_syntax)]
|
|
|
|
use std::ops::{Deref, DerefMut};
|
|
|
|
pub struct Arr {
|
|
ptr: Box<[uint]>
|
|
}
|
|
|
|
impl Deref for Arr {
|
|
type Target = [uint];
|
|
|
|
fn deref(&self) -> &[uint] {
|
|
panic!();
|
|
}
|
|
}
|
|
|
|
impl DerefMut for Arr {
|
|
fn deref_mut(&mut self) -> &mut [uint] {
|
|
&mut *self.ptr
|
|
}
|
|
}
|
|
|
|
pub fn foo(arr: &mut Arr) {
|
|
let x: &mut [uint] = &mut **arr;
|
|
assert!(x[0] == 1);
|
|
assert!(x[1] == 2);
|
|
assert!(x[2] == 3);
|
|
}
|
|
|
|
fn main() {
|
|
let mut a = Arr { ptr: box [1, 2, 3] };
|
|
foo(&mut a);
|
|
}
|