src/test/run-pass/swap-overlapping.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 // Issue #5041 - avoid overlapping memcpy when src and dest of a swap are the same
  12
  13 use std::ptr;
  14
  15 pub fn main() {
  16     let mut test = TestDescAndFn {
  17         desc: TestDesc {
  18             name: TestName::DynTestName("test".to_string()),
  19             should_fail: false
  20         },
  21         testfn: TestFn::DynTestFn(22),
  22     };
  23     do_swap(&mut test);
  24 }
  25
  26 fn do_swap(test: &mut TestDescAndFn) {
  27     unsafe {
  28         ptr::swap(test, test);
  29     }
  30 }
  31
  32 pub enum TestName {
  33     DynTestName(String)
  34 }
  35
  36 pub enum TestFn {
  37     DynTestFn(int),
  38     DynBenchFn(int),
  39 }
  40
  41 pub struct TestDesc {
  42     name: TestName,
  43     should_fail: bool
  44 }
  45
  46 pub struct TestDescAndFn {
  47     desc: TestDesc,
  48     testfn: TestFn,
  49 }