src/test/compile-fail/issue-15094.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
  13 use std::{fmt, ops};
  14
  15 struct Debuger<T> {
  16     x: T
  17 }
  18
  19 impl<T: fmt::Debug> ops::FnOnce<(),> for Debuger<T> {
  20     type Output = ();
  21     fn call_once(self, _args: ()) {
  22 //~^ ERROR `call_once` has an incompatible type for trait: expected "rust-call" fn, found "Rust" fn
  23         println!("{:?}", self.x);
  24     }
  25 }
  26
  27 fn make_shower<T>(x: T) -> Debuger<T> {
  28     Debuger { x: x }
  29 }
  30
  31 pub fn main() {
  32     let show3 = make_shower(3);
  33     show3();
  34 }