empty string parser consumed?

[jamesdbrock]

This applies to the previous implementation as well, but if passed the empty string won't this mark the input as consumed without actually consuming anything?

This is not feedback, just a discussion point.

Originally posted by @robertdp in #119 (comment)

[jamesdbrock]

I think consuming an empty string match is actually the correct behavior, because “consumed” really means “we want to commit to this alternative branch.”