When the -XOverloadedStrings language extension is on, treat a string s
as the parser 'string' s, when appropriate. This allows one to write
things like "a" *> otherParser instead of 'string' "a" *> otherParser.
This patch fixes the date parsing issue currently when an entry like
`todo +d 22 01 2022` is used. I have added tests too which demonstrate
the current issue so that we can prevent future regression.
This module provides a parser combinator library based on base's ReadP,
which aims to function more like other popular combinator libraries like
attoparsec and megaparsec.
In particular, the Alternative and Monoid instances are left-biased now,
so combinators like `many` and `optional` from Control.Applicative work
in a more intuitive manner. Further, some functions (like `endBy1`)
only return the "most successful" parse, instead of returning all of
them. We can now get away with providing a single parsing result
instead of ReadP's list of results (as such, parsers need to be
disambiguated earlier instead of trimming the list down after parsing).