37 lines
966 B
Rust
37 lines
966 B
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(unboxed_closures)]
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use std::{fmt, ops};
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struct Debuger<T> {
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x: T
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}
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impl<T: fmt::Debug> ops::FnOnce<(),> for Debuger<T> {
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type Output = ();
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fn call_once(self, _args: ()) {
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//~^ ERROR `call_once` has an incompatible type for trait
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//~| expected type `extern "rust-call" fn
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//~| found type `fn
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println!("{:?}", self.x);
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}
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}
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fn make_shower<T>(x: T) -> Debuger<T> {
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Debuger { x: x }
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}
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pub fn main() {
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let show3 = make_shower(3);
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show3();
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}
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