1 ! Copyright (C) 2010 John Benediktsson
2 ! See http://factorcode.org/license.txt for BSD license
3 USING: fry kernel lexer macros math math.parser peg.ebnf random
9 number = ([0-9])+ => [[ string>number ]]
10 dice = "d" number => [[ second '[ _ random ] ]]
11 roll = number dice => [[ first2 '[ 0 _ [ @ + 1 + ] times ] ]]
12 added = "+" number => [[ second '[ _ + ] ]]
13 total = roll added? => [[ first2 [ append ] when* ]]
14 error = .* => [[ "unknown dice" throw ]]
19 MACRO: roll ( string -- ) parse-roll ;
21 SYNTAX: ROLL: scan-token parse-roll append! ;