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(box_syntax)]
13 fn needs_fn<F>(x: F) where F: Fn(isize) -> isize {}
16 let _: () = (box |_: isize| {}) as Box<FnOnce(isize)>;
17 //~^ ERROR mismatched types
18 //~| expected type `()`
19 //~| found type `std::boxed::Box<std::ops::FnOnce(isize)>`
20 let _: () = (box |_: isize, isize| {}) as Box<Fn(isize, isize)>;
21 //~^ ERROR mismatched types
22 //~| expected type `()`
23 //~| found type `std::boxed::Box<std::ops::Fn(isize, isize)>`
24 let _: () = (box || -> isize { unimplemented!() }) as Box<FnMut() -> isize>;
25 //~^ ERROR mismatched types
26 //~| expected type `()`
27 //~| found type `std::boxed::Box<std::ops::FnMut() -> isize>`
30 //~^ ERROR : std::ops::Fn<(isize,)>`