| Portability | portable | 
|---|---|
| Maintainer | libraries@haskell.org | 
| Safe Haskell | None | 
Distribution.InstalledPackageInfo
Description
This is the information about an installed package that
 is communicated to the ghc-pkg program in order to register
 a package.  ghc-pkg now consumes this package format (as of version
 6.4). This is specific to GHC at the moment.
The .cabal file format is for describing a package that is not yet
 installed. It has a lot of flexibility, like conditionals and dependency
 ranges. As such, that format is not at all suitable for describing a package
 that has already been built and installed. By the time we get to that stage,
 we have resolved all conditionals and resolved dependency version
 constraints to exact versions of dependent packages. So, this module defines
 the InstalledPackageInfo data structure that contains all the info we keep
 about an installed package. There is a parser and pretty printer. The
 textual format is rather simpler than the .cabal format: there are no
 sections, for example.
Documentation
data InstalledPackageInfo_ m
Constructors
| InstalledPackageInfo | |
| Fields 
 | |
Instances
| Read m => Read (InstalledPackageInfo_ m) | |
| Show m => Show (InstalledPackageInfo_ m) | |
| Package (InstalledPackageInfo_ str) | 
data ParseResult a
Constructors
| ParseFailed PError | |
| ParseOk [PWarning] a | 
Instances
| Monad ParseResult | |
| Show a => Show (ParseResult a) |