| // Copyright 2012 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. |
| |
| extern fn f() { |
| } |
| |
| fn is_fn<F>(_: F) where F: Fn() {} |
| |
| fn main() { |
| // extern functions are extern "C" fn |
| let _x: extern "C" fn() = f; // OK |
| is_fn(f); |
| //~^ ERROR the trait `core::ops::Fn<()>` is not implemented for the type `extern "C" fn() |
| //~| ERROR the trait `core::ops::FnOnce<()>` is not implemented for the type `extern "C" fn() |
| } |
