| // 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. |
| |
| fn require_copy<T: Copy>(x: T) {} |
| |
| struct Bar<T> { x: T } |
| |
| trait Foo<T> { |
| fn needs_copy(self) where T: Copy; |
| fn fails_copy(self); |
| } |
| |
| // Ensure constraints are only attached to methods locally |
| impl<T> Foo<T> for Bar<T> { |
| fn needs_copy(self) where T: Copy { |
| require_copy(self.x); |
| |
| } |
| |
| fn fails_copy(self) { |
| require_copy(self.x); |
| //~^ ERROR the trait bound `T: std::marker::Copy` is not satisfied |
| } |
| } |
| |
| fn main() {} |
