newtype_derive 0.1.6

This crate provides macros for deriving common traits for newtype structures.
Documentation 
/*
Copyright ⓒ 2016 Daniel Keep.

Licensed under the MIT license (see LICENSE or <http://opensource.org
/licenses/MIT>) or the Apache License, Version 2.0 (see LICENSE of
<http://www.apache.org/licenses/LICENSE-2.0>), 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 rustc_version;
use rustc_version::{version_matches};

fn main() {
    println!("cargo:rerun-if-changed=build.rs");

    if version_matches("1.8.0") {
        println!("cargo:rustc-cfg=op_assign");
    }
}