src/test/run-pass/fmt-pointer-trait.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 use std::ptr;
  12 use std::rc::Rc;
  13 use std::sync::Arc;
  14
  15 fn main() {
  16     let p: *const u8 = ptr::null();
  17     let rc = Rc::new(1usize);
  18     let arc = Arc::new(1usize);
  19     let b = Box::new("hi");
  20
  21     let _ = format!("{:p}{:p}{:p}",
  22                     rc, arc, b);
  23
  24     if cfg!(target_pointer_width = "32") {
  25         assert_eq!(format!("{:#p}", p),
  26                    "0x00000000");
  27     } else {
  28         assert_eq!(format!("{:#p}", p),
  29                    "0x0000000000000000");
  30     }
  31     assert_eq!(format!("{:p}", p),
  32                "0x0");
  33 }