Implement Foldable, monoid for parser

Question

Implement Foldable, monoid for parser

flip111 opened this issue 9 years ago · 2 comments

Would be nice to be able to fold over a list of parsers.
When using endBy1 a sep where a is a string parser, would be nice to concat the result with fold

Answer 1 · 2017-11-17T18:32:06.000Z

I've added a Semigroup instance in #38, which allows for a nicer syntax like parser1 <> parser2 <> parser3

Answer 2 · 2019-10-15T05:54:16.000Z

Since we have a Semigroup instance where append = lift2 append, it probably also makes sense to add a Monoid instance with mempty = pure mempty.