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 // pretty-expanded FIXME #23616
  14
  15 use std::ptr;
  16
  17 pub fn main() {
  18     let mut test = TestDescAndFn {
  19         desc: TestDesc {
  20             name: TestName::DynTestName("test".to_string()),
  21             should_fail: false
  22         },
  23         testfn: TestFn::DynTestFn(22),
  24     };
  25     do_swap(&mut test);
  26 }
  27
  28 fn do_swap(test: &mut TestDescAndFn) {
  29     unsafe {
  30         ptr::swap(test, test);
  31     }
  32 }
  33
  34 pub enum TestName {
  35     DynTestName(String)
  36 }
  37
  38 pub enum TestFn {
  39     DynTestFn(isize),
  40     DynBenchFn(isize),
  41 }
  42
  43 pub struct TestDesc {
  44     name: TestName,
  45     should_fail: bool
  46 }
  47
  48 pub struct TestDescAndFn {
  49     desc: TestDesc,
  50     testfn: TestFn,
  51 }