draft for day7 of adventofcode.com

day7.p6

grammar circuit {
    rule TOP { <wiring>+ }
    rule wiring { <expression> '->' <destination=identifier> }
    rule expression { <NOT> | <AND> | <OR> | <RSHIFT> | <LSHIFT> | <value> }
    token value { <literal> | <identifier> }
    token literal { <.digit>+ }
    token identifier { <.alpha>+ }
    rule NOT { NOT <value> }
    rule AND { <left=value> AND <right=value> }
    rule OR  { <left=value> OR <right=value> }
    rule RSHIFT { <left=value> RSHIFT <right=value> }
    rule LSHIFT { <left=value> LSHIFT <right=value> }
}

circuit.parse: slurp, actions => class {
    # do cool S17 stuff here?
}