src/test/run-pass/issue-20575.rs

   1 // Copyright 2015 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 // Test that overloaded calls work with zero arity closures
  12
  13 // pretty-expanded FIXME #23616
  14
  15 fn main() {
  16     // FIXME (#22405): Replace `Box::new` with `box` here when/if possible.
  17     let functions: [Box<Fn() -> Option<()>>; 1] = [Box::new(|| None)];
  18
  19     let _: Option<Vec<()>> = functions.iter().map(|f| (*f)()).collect();
  20 }