irc-parser.p6

use v6;
grammar IRC::Grammar:ver<1.001001> {
    token TOP { <message>+ }
    token SPACE { ' '+ }
    token message { [':' <prefix> <SPACE> ]? <command> <params> \n }
        token prefix  {
            [ <servername> || <nick> ['!' <user>]? ['@' <host>]? ]
            <before <SPACE>>
        }
            token servername { <host> }
            token nick { <letter> [ <letter> | <number> | <special> ]* }
            token user { <-[\ \0\r\n]>+?  <before [<SPACE> | '@']>}
            token host { <-[\s!@]>+ }
        token command { <letter>+ | <number>**3 }
        token params { <SPACE>* [ ':' <trailing> | <middle> <params> ]? }
            token middle { <-[:\ \0\r\n]> <-[\ \0\r\n]>* }
            token trailing { <-[\0\r\n]>* }

        token letter { <[a..zA..Z]> }
        token number { <[0..9]> }
        token special { <[-\[\]\\`^{}]> }
}