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[rustc.git] / src / test / compile-fail / fn-trait-formatting.rs
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.
4 //
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.
10
11 #![feature(unboxed_closures)]
12 #![feature(box_syntax)]
13
14 fn needs_fn<F>(x: F) where F: Fn(isize) -> isize {}
15
16 fn main() {
17 let _: () = (box |_: isize| {}) as Box<FnOnce(isize)>;
18 //~^ ERROR mismatched types
19 //~| expected `()`
20 //~| found `Box<std::ops::FnOnce(isize)>`
21 //~| expected ()
22 //~| found box
23 let _: () = (box |_: isize, isize| {}) as Box<Fn(isize, isize)>;
24 //~^ ERROR mismatched types
25 //~| expected `()`
26 //~| found `Box<std::ops::Fn(isize, isize)>`
27 //~| expected ()
28 //~| found box
29 let _: () = (box || -> isize { unimplemented!() }) as Box<FnMut() -> isize>;
30 //~^ ERROR mismatched types
31 //~| expected `()`
32 //~| found `Box<std::ops::FnMut() -> isize>`
33 //~| expected ()
34 //~| found box
35
36 needs_fn(1);
37 //~^ ERROR : std::ops::Fn<(isize,)>`
38 //~| ERROR : std::ops::FnOnce<(isize,)>`
39 }