src/test/compile-fail/unboxed-closure-sugar-lifetime-elision.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.

// Test that the unboxed closure sugar can be used with an arbitrary
// struct type and that it is equivalent to the same syntax using
// angle brackets. This test covers only simple types and in
// particular doesn't test bound regions.

#![feature(unboxed_closures)]
#![allow(dead_code)]

use std::marker;

trait Foo<T> {
    type Output;
    fn dummy(&self, t: T);
}

trait Eq<X: ?Sized> { }
impl<X: ?Sized> Eq<X> for X { }
fn eq<A: ?Sized,B: ?Sized +Eq<A>>() { }

fn main() {
    eq::< for<'a> Foo<(&'a isize,), Output=&'a isize>,
          Foo(&isize) -> &isize                                   >();
    eq::< for<'a> Foo<(&'a isize,), Output=(&'a isize, &'a isize)>,
          Foo(&isize) -> (&isize, &isize)                           >();

    let _: Foo(&isize, &usize) -> &usize; //~ ERROR missing lifetime specifier
}