Now all the combinators in ‘Text.Megaparsec.Combinator’ are defined for
any instance of ‘Control.Alternative’ (sometimes ‘Control.Applicative’).
Some combinators are inlined.
These parsers are considered deprecated:
* ‘chainl’
* ‘chainl1’
* ‘chainr’
* ‘chainr1’
* ‘sepEndBy’
* ‘sepEndBy1’
Apart from this, the commit includes various cosmetic changes in
module ‘Text.Megaparsec.Combinator’.
* Removed ‘optionMaybe’ parser, because ‘optional’ from
‘Control.Applicative’ does the same thing.
* Renamed ‘tokenPrim’ → ‘token’, removed old ‘token’, because
‘tokenPrim’ is more general and ‘token’ is little used.
* Fixed bug with ‘notFollowedBy’ always succeeded with parsers that
don't consume input, see #6.
* Hint system introduced that greatly improved quality of error messages
and made code of ‘Text.Megaparsec.Prim’ a lot clearer.
The improvements affected other modules too:
* Some parsers from ‘Text.Megaparsec.Combinators’ now live in
‘Text.Megaparsec.Prim’.
* Hint system improved error messages, so I needed to rewrite test for
‘Text.Megaparsec.Char.eol’, since it's error messages are very
intelligent now and cannot be emulated by ‘newline’ and ‘crlf’ parsers
used separately.
* Test for Bug9 from old-tests is passed successfully again.
This parser can be told to parse from ‘m’ to ‘n’ occurrences of some
thing. Old parser ‘count’ is now named ‘count’' and defined in terms of
that more powerful one.
This commit also reorders functions in module
‘Text.Megaparsec.Combinator’ and everywhere where the functions are
listed. The same order is used everywhere.
