# derby

Erlang dice rolling library using leex and yecc.

## Examples
```erlang
1> derby:query("4d6h3").
{result,14,[6,4,4],[4,4,6,2],0}

2> derby:parse("4d6h3").
{roll,[6,6,6,6],0,[{high,3}]}

3> derby:roll({roll,[20,20],3,[{high, 1}]}).
{result,16,[13],[13,12],3}

4> derby:chance(derby:parse("2d20l1"),20).
0.0025
```