09783d1dab
explicit form `Fn<A,B>` and now should use `Fn(A) -> B` or `Fn<A,Output=B>`, but in some cases we get duplicate error reports. This is mildly annoying and arises because of the main error and another error from the projection. Might be worth squashing those, but seems like a separate problem.
59 lines
2.4 KiB
Rust
59 lines
2.4 KiB
Rust
// 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() { }
|