src/test/run-pass/zero-sized-vec-push.rs

   1 // Copyright 2013 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::iter::Iterator;
  12 use std::vec::Vec;
  13
  14 fn main() {
  15     const N: usize = 8;
  16
  17     for len in 0..N {
  18         let mut tester = Vec::with_capacity(len);
  19         assert_eq!(tester.len(), 0);
  20         assert!(tester.capacity() >= len);
  21         for bit in 0..len {
  22             tester.push(());
  23         }
  24         assert_eq!(tester.len(), len);
  25         assert_eq!(tester.iter().count(), len);
  26         tester.clear();
  27     }
  28 }