Fixed the dice amount parsing code to propagate a parsing result
through the parser, while properly handling string to i32 conversion.
We now only attempt to convert to i32 if all characters in the
expression are numeric.
This commit also refactors the dice parsing by moving most of the
parsing closures into separate functions, which makes the parsing
function itself more readable. Some variable names were also changed,
for further clarity.
Fixes#21.
This gives it parity with the other systems: cofd and cthulhu. More
refactoring and a rewrite later as we trend towards more
system-specific implementations.
projectmoon
Taylor C. Richberger