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1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![feature(unboxed_closures)]
12 #![feature(box_syntax)]
14 fn needs_fn
<F
>(x
: F
) where F
: Fn(isize) -> isize {}
17 let _
: () = (box |_
: isize| {}
) as Box
<FnOnce(isize)>;
18 //~^ ERROR mismatched types
20 //~| found `Box<std::ops::FnOnce(isize)>`
23 let _
: () = (box |_
: isize, isize| {}
) as Box
<Fn(isize, isize)>;
24 //~^ ERROR mismatched types
26 //~| found `Box<std::ops::Fn(isize, isize)>`
29 let _
: () = (box || -> isize { unimplemented!() }
) as Box
<FnMut() -> isize>;
30 //~^ ERROR mismatched types
32 //~| found `Box<std::ops::FnMut() -> isize>`
37 //~^ ERROR : std::ops::Fn<(isize,)>`
38 //~| ERROR : std::ops::FnOnce<(isize,)>`