Please read the API documentation here
To use the macros in this crate, use the phase(plugin) attribute:
#![feature(phase)] #[phase(plugin, link)] extern crate itertools;
I recommend shortening the crate name with something like:
use itertools as it;
Dual-licensed to be compatible with the Rust project.
Licensed under the Apache License, Version 2.0 http://www.apache.org/licenses/LICENSE-2.0 or the MIT license http://opensource.org/licenses/MIT, at your option. This file may not be copied, modified, or distributed except according to those terms.