| // 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)] |
| |
| trait Foo<T> { |
| type Output; |
| fn dummy(&self, t: T, u: Self::Output); |
| } |
| |
| trait Eq<X: ?Sized> { } |
| impl<X: ?Sized> Eq<X> for X { } |
| fn eq<A: ?Sized,B: ?Sized +Eq<A>>() { } |
| |
| fn test<'a,'b>() { |
| // No errors expected: |
| eq::< Foo<(),Output=()>, Foo() >(); |
| eq::< Foo<(isize,),Output=()>, Foo(isize) >(); |
| eq::< Foo<(isize,usize),Output=()>, Foo(isize,usize) >(); |
| eq::< Foo<(isize,usize),Output=usize>, Foo(isize,usize) -> usize >(); |
| eq::< Foo<(&'a isize,&'b usize),Output=usize>, Foo(&'a isize,&'b usize) -> usize >(); |
| |
| // Test that anonymous regions in `()` form are equivalent |
| // to fresh bound regions, and that we can intermingle |
| // named and anonymous as we choose: |
| eq::< for<'x,'y> Foo<(&'x isize,&'y usize),Output=usize>, |
| for<'x,'y> Foo(&'x isize,&'y usize) -> usize >(); |
| eq::< for<'x,'y> Foo<(&'x isize,&'y usize),Output=usize>, |
| for<'x> Foo(&'x isize,&usize) -> usize >(); |
| eq::< for<'x,'y> Foo<(&'x isize,&'y usize),Output=usize>, |
| for<'y> Foo(&isize,&'y usize) -> usize >(); |
| eq::< for<'x,'y> Foo<(&'x isize,&'y usize),Output=usize>, |
| Foo(&isize,&usize) -> usize >(); |
| |
| // lifetime elision |
| eq::< for<'x> Foo<(&'x isize,), Output=&'x isize>, |
| Foo(&isize) -> &isize >(); |
| |
| // Errors expected: |
| eq::< Foo<(),Output=()>, |
| Foo(char) >(); |
| //~^^ ERROR not implemented |
| } |
| |
| fn main() { } |