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

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// 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.
trait Foo<T> {}
trait Bar<A> {
fn method<B>(&self) where A: Foo<B>;
}
struct S;
struct X;
// Remove this impl causing the below resolution to fail // impl Foo<S> for X {}
impl Bar<X> for int {
fn method<U>(&self) where X: Foo<U> {
}
}
fn main() {
1.method::<X>();
//~^ ERROR the trait `Foo<_>` is not implemented for the type `X`
}