| // 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 |
| |
| |
| use std::ops::Deref; |
| |
| pub struct Arr { |
| ptr: Box<[usize]> |
| } |
| |
| impl Deref for Arr { |
| type Target = [usize]; |
| |
| fn deref(&self) -> &[usize] { |
| &*self.ptr |
| } |
| } |
| |
| pub fn foo(arr: &Arr) { |
| assert_eq!(arr.len(), 3); |
| let x: &[usize] = &**arr; |
| assert_eq!(x[0], 1); |
| assert_eq!(x[1], 2); |
| assert_eq!(x[2], 3); |
| } |
| |
| fn main() { |
| // FIXME (#22405): Replace `Box::new` with `box` here when/if possible. |
| let a = Arr { ptr: Box::new([1, 2, 3]) }; |
| foo(&a); |
| } |