| // 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. |
| |
| use std::ops::{Index, IndexMut}; |
| |
| struct S; |
| struct H; |
| |
| impl S { |
| fn f(&mut self) {} |
| } |
| |
| impl Index<u32> for H { |
| type Output = S; |
| fn index(&self, index: u32) -> &S { |
| unimplemented!() |
| } |
| } |
| |
| impl IndexMut<u32> for H { |
| fn index_mut(&mut self, index: u32) -> &mut S { |
| unimplemented!() |
| } |
| } |
| |
| fn main() { |
| H["?"].f(); //~ ERROR mismatched types |
| } |
