| // 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 overloaded index expressions with DST result types |
| // can't be used as rvalues |
| |
| use std::ops::Index; |
| use std::fmt::Debug; |
| |
| #[derive(Copy, Clone)] |
| struct S; |
| |
| impl Index<usize> for S { |
| type Output = str; |
| |
| fn index(&self, _: usize) -> &str { |
| "hello" |
| } |
| } |
| |
| #[derive(Copy, Clone)] |
| struct T; |
| |
| impl Index<usize> for T { |
| type Output = Debug + 'static; |
| |
| fn index<'a>(&'a self, idx: usize) -> &'a (Debug + 'static) { |
| static x: usize = 42; |
| &x |
| } |
| } |
| |
| fn main() { |
| S[0]; |
| //~^ ERROR cannot move out of indexed content |
| //~^^ ERROR E0161 |
| T[0]; |
| //~^ ERROR cannot move out of indexed content |
| //~^^ ERROR E0161 |
| } |