36 lines
1.0 KiB
Rust
36 lines
1.0 KiB
Rust
|
// Copyright 2014 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.
|
||
|
|
|
||
|
|
use core::raw::*;
|
||
|
|
use core::mem;
|
||
|
|
|
||
|
|
#[test]
|
||
|
|
fn synthesize_closure() {
|
||
|
|
unsafe {
|
||
|
|
let x = 10;
|
||
|
|
let f: |int| -> int = |y| x + y;
|
||
|
|
|
||
|
|
assert_eq!(f(20), 30);
|
||
|
|
|
||
|
|
let original_closure: Closure = mem::transmute(f);
|
||
|
|
|
||
|
|
let actual_function_pointer = original_closure.code;
|
||
|
|
let environment = original_closure.env;
|
||
|
|
|
||
|
|
let new_closure = Closure {
|
||
|
|
code: actual_function_pointer,
|
||
|
|
env: environment
|
||
|
|
};
|
||
|
|
|
||
|
|
let new_f: |int| -> int = mem::transmute(new_closure);
|
||
|
|
assert_eq!(new_f(20), 30);
|
||
|
|
}
|
||
|
|
}
|