| // 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. |
| |
| // Check that when making a ref mut binding with type `&mut T`, the |
| // type `T` must match precisely the type `U` of the value being |
| // matched, and in particular cannot be some supertype of `U`. Issue |
| // #23116. This test focuses on a `match`. |
| |
| #![allow(dead_code)] |
| struct S<'b>(&'b i32); |
| impl<'b> S<'b> { |
| fn bar<'a>(&'a mut self) -> &'a mut &'a i32 { |
| match self.0 { ref mut x => x } //~ ERROR mismatched types |
| } |
| } |
| |
| fn main() {} |
