layout_id 0.3.0

Layout id is used to generate a unique id for a type that changes if it's memory layout changes
Documentation 
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// Copyright (c) 2016 Jonathan Nilsson
//
// 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. All files in the project carrying such notice may not be copied,
// modified, or distributed except according to those terms.

extern crate layout_id;

use layout_id::layout_id;

#[test]
fn test() {
    assert_eq!(layout_id::<u32>(), 14074274251666770937);
    assert_eq!(layout_id::<u64>(), 3773023296331217871);
    assert_eq!(layout_id::<i64>(), 14943777094849870615);
}