Utilities for parsing PackageDescription and InstalledPackageInfo.
The .cabal file format is not trivial, especially with the introduction
of configurations and the section syntax that goes with that. This module
has a bunch of parsing functions that is used by the .cabal parser and a
couple others. It has the parsing framework code and also little parsers for
many of the formats we get in various .cabal file fields, like module
names, comma separated lists etc.
|Field descriptor. The parameter a parameterizes over where the field's
value is stored in.
|fieldName :: String|
|fieldGet :: a -> Doc|
|fieldSet :: LineNo -> String -> a -> ParseResult a||fieldSet n str x Parses the field value from the given input
string str and stores the result in x if the parse was
successful. Otherwise, reports an error on line number n.
|parse a module name
|=> ReadP r b||The parser for the stuff between commas
|-> ReadP r a|
|-> ReadP r [a]|
|Pretty-print free-format text, ensuring that it is vertically aligned,
and with blank lines replaced by dots for correct re-parsing.
|The type of a function which, given a name-value pair of an
unrecognized field, and the current structure being built,
decides whether to incorporate the unrecognized field
(by returning Just x, where x is a possibly modified version
of the structure being built), or not (by returning Nothing).
|A default unrecognized field parser which simply returns Nothing,
i.e. ignores all unrecognized fields, so warnings will be generated.
|A default unrecognized field parser which silently (i.e. no
warnings will be generated) ignores unrecognized fields, by
returning the structure being built unmodified.
|Produced by Haddock version 2.6.0|