src/test/run-pass/while-prelude-drop.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 use std::string::String;
  12
  13 #[derive(PartialEq)]
  14 enum t { a, b(String), }
  15
  16 fn make(i: isize) -> t {
  17     if i > 10 { return t::a; }
  18     let mut s = String::from("hello");
  19     // Ensure s is non-const.
  20
  21     s.push_str("there");
  22     return t::b(s);
  23 }
  24
  25 pub fn main() {
  26     let mut i = 0;
  27
  28
  29     // The auto slot for the result of make(i) should not leak.
  30     while make(i) != t::a { i += 1; }
  31 }