tool 0.2.1

A grab-bag of tools for functional programming.
Documentation 
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extern crate tool;

use tool::prelude::*;
#[test]
fn test_compose() {
    assert!(compose(empty, first)(("", "asdf")));
    assert!(compose(non_empty, second)(("", "asdf")));
}

#[test]
fn test_flip() {
    let mut v = vec![1, 2, 3];

    flip(Vec::push)(v[0], &mut v);
    assert_eq!(v, vec![1, 2, 3, 1]);
}

#[test]
fn test_fix() {
    let fib = fix(|f, x| {
        if x == 0 || x == 1 {
            x
        } else {
            f(x - 1) + f(x - 2)
        }
    });
    assert_eq!(55, fib(10));
}