src/test/run-pass/traits/dyn-trait.rs

   1 // Copyright 2017 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 // run-pass
  12 // ignore-pretty `dyn ::foo` parses differently in the current edition
  13
  14 use std::fmt::Display;
  15
  16 static BYTE: u8 = 33;
  17
  18 fn main() {
  19     let x: &(dyn 'static + Display) = &BYTE;
  20     let y: Box<dyn Display + 'static> = Box::new(BYTE);
  21     let _: &dyn (Display) = &BYTE;
  22     let _: &dyn (::std::fmt::Display) = &BYTE;
  23     let xstr = format!("{}", x);
  24     let ystr = format!("{}", y);
  25     assert_eq!(xstr, "33");
  26     assert_eq!(ystr, "33");
  27 }