src/test/compile-fail/where-clause-method-substituion.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 trait Foo<T> {
  12     fn dummy(&self, t: T) { }
  13 }
  14
  15 trait Bar<A> {
  16     fn method<B>(&self) where A: Foo<B>;
  17 }
  18
  19 struct S;
  20 struct X;
  21
  22 // Remove this impl causing the below resolution to fail // impl Foo<S> for X {}
  23
  24 impl Bar<X> for isize {
  25     fn method<U>(&self) where X: Foo<U> {
  26     }
  27 }
  28
  29 fn main() {
  30     1.method::<X>();
  31     //~^ ERROR the trait bound `X: Foo<X>` is not satisfied
  32 }