19 lines
694 B
Rust
19 lines
694 B
Rust
// Copyright 2015 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.
|
|
|
|
use std::any::Any;
|
|
fn main()
|
|
{
|
|
fn bar(x:i32) ->i32 { 3*x };
|
|
let b:Box<Any> = Box::new(bar as fn(_)->_);
|
|
b.downcast_ref::<fn(_)->_>();
|
|
//~^ ERROR cannot determine a type for this expression: unconstrained type
|
|
}
|