Macro or

macro_rules! or {
    ($single:expr) => { ... };
    ($first:expr, $($rest:expr),+) => { ... };
}

A macro for creating or combination of parsers.

Example

use rusty_parser as rp;
use rp::IntoParser;

// 'a' or 'b' or 'c'
let ab_parser = rp::or!('a', 'b', 'c'); // IntoParser for char