fix_fn

This library enables the creation of recursive closures by providing a single macro fix_fn. The functionality is similar to the Y combinator. Recursive closures can have arbitrary amounts of parameters and can capture variables.

use fix_fn::fix_fn;
let fib = fix_fn!(|fib, i: u32| -> u32 {
    if i <= 1 {
           i
    } else {
        // fib will call the closure recursively
        fib(i - 1) + fib(i - 2)
    }
});

assert_eq!(fib(7), 13);