src/test/run-pass/block-arg-call-as.rs

   1 // Copyright 2012 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 fn asBlock<F>(f: F) -> uint where F: FnOnce() -> uint {
  12    return f();
  13 }
  14
  15 pub fn main() {
  16    let x = asBlock(|| 22u);
  17    assert_eq!(x, 22u);
  18 }