rust/src/test/run-pass/swap-overlapping.rs
2013-11-26 08:25:27 -08:00

50 lines
1.1 KiB
Rust

// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Issue #5041 - avoid overlapping memcpy when src and dest of a swap are the same
use std::ptr;
pub fn main() {
let mut test = TestDescAndFn {
desc: TestDesc {
name: DynTestName(~"test"),
should_fail: false
},
testfn: DynTestFn(proc() ()),
};
do_swap(&mut test);
}
fn do_swap(test: &mut TestDescAndFn) {
unsafe {
ptr::swap_ptr(test, test);
}
}
pub enum TestName {
DynTestName(~str)
}
pub enum TestFn {
DynTestFn(proc()),
DynBenchFn(proc(&mut int))
}
pub struct TestDesc {
name: TestName,
should_fail: bool
}
pub struct TestDescAndFn {
desc: TestDesc,
testfn: TestFn,
}