| // 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. |
| |
| #![feature(box_syntax)] |
| |
| fn needs_fn<F>(x: F) where F: Fn(isize) -> isize {} |
| |
| fn main() { |
| let _: () = (box |_: isize| {}) as Box<FnOnce(isize)>; |
| //~^ ERROR mismatched types |
| //~| expected type `()` |
| //~| found type `std::boxed::Box<dyn std::ops::FnOnce(isize)>` |
| let _: () = (box |_: isize, isize| {}) as Box<Fn(isize, isize)>; |
| //~^ ERROR mismatched types |
| //~| expected type `()` |
| //~| found type `std::boxed::Box<dyn std::ops::Fn(isize, isize)>` |
| let _: () = (box || -> isize { unimplemented!() }) as Box<FnMut() -> isize>; |
| //~^ ERROR mismatched types |
| //~| expected type `()` |
| //~| found type `std::boxed::Box<dyn std::ops::FnMut() -> isize>` |
| |
| needs_fn(1); |
| //~^ ERROR expected a `std::ops::Fn<(isize,)>` closure, found `{integer}` |
| } |