mirror of
https://github.com/rust-lang/rust.git
synced 2024-10-31 14:31:55 +00:00
36 lines
1.1 KiB
Rust
36 lines
1.1 KiB
Rust
|
// Copyright 2012-2016 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.
|
||
|
|
|
||
|
|
// Regression test for Issue #30530: alloca's created for storing
|
||
|
|
// intermediate scratch values during brace-less match arms need to be
|
||
|
|
// initialized with their drop-flag set to "dropped" (or else we end
|
||
|
|
// up running the destructors on garbage data at the end of the
|
||
|
|
// function).
|
||
|
|
|
||
|
|
pub enum Handler {
|
||
|
|
Default,
|
||
|
|
#[allow(dead_code)]
|
||
|
|
Custom(*mut Box<Fn()>),
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
take(Handler::Default, Box::new(main));
|
||
|
|
}
|
||
|
|
|
||
|
|
#[inline(never)]
|
||
|
|
pub fn take(h: Handler, f: Box<Fn()>) -> Box<Fn()> {
|
||
|
|
unsafe {
|
||
|
|
match h {
|
||
|
|
Handler::Custom(ptr) => *Box::from_raw(ptr),
|
||
|
|
Handler::Default => f,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|