| // 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 the user gets an errror if they omit a binding from an |
| // object type. |
| |
| pub trait Foo { |
| type A; |
| type B; |
| fn boo(&self) -> <Self as Foo>::A; |
| } |
| |
| struct Bar; |
| |
| impl Foo for isize { |
| type A = usize; |
| type B = char; |
| fn boo(&self) -> usize { |
| 42 |
| } |
| } |
| |
| pub fn main() { |
| let a = &42isize as &Foo<A=usize, B=char>; |
| |
| let b = &42isize as &Foo<A=usize>; |
| //~^ ERROR the value of the associated type `B` (from the trait `Foo`) must be specified |
| |
| let c = &42isize as &Foo<B=char>; |
| //~^ ERROR the value of the associated type `A` (from the trait `Foo`) must be specified |
| |
| let d = &42isize as &Foo; |
| //~^ ERROR the value of the associated type `A` (from the trait `Foo`) must be specified |
| //~| ERROR the value of the associated type `B` (from the trait `Foo`) must be specified |
| } |