| // 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 equality constraints in a where clause where the type being |
| // equated appears in a supertrait. |
| |
| pub trait Vehicle { |
| type Color; |
| |
| fn go(&self) { } |
| } |
| |
| pub trait Box { |
| type Color; |
| |
| fn mail(&self) { } |
| } |
| |
| pub trait BoxCar : Box + Vehicle { |
| } |
| |
| fn dent<C:BoxCar>(c: C, color: C::Color) { |
| //~^ ERROR ambiguous associated type `Color` in bounds of `C` |
| //~| NOTE could derive from `Vehicle` |
| //~| NOTE could derive from `Box` |
| } |
| |
| fn dent_object<COLOR>(c: BoxCar<Color=COLOR>) { |
| //~^ ERROR ambiguous associated type |
| //~| ERROR the value of the associated type `Color` (from the trait `Vehicle`) must be specified |
| //~| NOTE could derive from `Vehicle` |
| //~| NOTE could derive from `Box` |
| } |
| |
| fn paint<C:BoxCar>(c: C, d: C::Color) { |
| //~^ ERROR ambiguous associated type `Color` in bounds of `C` |
| //~| NOTE could derive from `Vehicle` |
| //~| NOTE could derive from `Box` |
| } |
| |
| pub fn main() { } |