Keyword arguments!

kwargs.rs

#![feature(phase)]

#[phase(plugin)]
extern crate kwarg_macros;

kwarg_decl!(foo(a = 1, b = 2, c = 3))

fn foo(a: int, b: int, c: int) -> (int, int, int)
{
	(a, b, c)
}

fn main()
{
	let ret = foo!(1, c = 5, b = 2);
	assert_eq!(ret, (1, 2, 5));
}