associated-types-unconstrained.rs

// 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 an associated type cannot be bound in an expression path.

trait Foo {
    type A;
    fn bar() -> isize;
}

impl Foo for isize {
    type A = usize;
    fn bar() -> isize { 42 }
}

pub fn main() {
    let x: isize = Foo::bar();
    //~^ ERROR type annotations required
}