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derby

0.2.0
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A dice rolling library capable of calculating complex roll chances.

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derby src derby_lexer.xrl
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src/derby_lexer.xrl 

Definitions.



DIE = d

INT = [0-9]+

MOD = [hl+-]

WS  = [\s\t\r\n]



Rules.



{DIE} : {token, {die, TokenLine, d}}.

{INT} : {token, {int, TokenLine, list_to_integer(TokenChars)}}.

{MOD} : {token, {mod, TokenLine, expand_mod(list_to_atom(TokenChars))}}.

{WS}  : skip_token.



Erlang code.



expand_mod(Mod) ->

    case Mod of

        '+' -> plus;

        '-' -> minus;

        h   -> high;

        l   -> low

    end.