The ghc-lib-parser-ex package contains GHC API parse tree utilities.

This library provides a datatype which can be interpreted by apply-refact. It exists as a separate library so that applications can specify refactorings without depending on GHC.

Lightweight pure data validation based on Applicative and Selective functors.

This package provides the ShortText type which is suitable for keeping many short strings in memory. This is similar to how ShortByteString relates to ByteString.

The main difference between Text and ShortText is that ShortText uses UTF-8 instead of UTF-16 internally and also doesn't support zero-copy slicing (thereby saving 2 words). Consequently, the memory footprint of a (boxed) ShortText value is 4 words (2 words when unboxed) plus the length of the UTF-8 encoded payload.

This library provides a wide array of (semi)groupoids and operations for working with them. A Semigroupoid is a Category without the requirement of identity arrows for every object in the category. A Category is any Semigroupoid for which the Yoneda lemma holds. Finally, to work with these weaker structures it is beneficial to have containers that can provide stronger guarantees about their contents, so versions of Traversable and Foldable that can be folded with just a Semigroup are added.

doclayout is a pretty-printing library for laying out text documents, with several features not present in pretty-printing libraries designed for code. It was designed for use in Pandoc.

This package contains the Control.Monad.Fail module providing the MonadFail class that became available in base-4.9.0.0 for older base package versions. This package turns into an empty package when used with GHC versions which already provide the Control.Monad.Fail module.

This package provides a string interpolation library for Haskell.

This package converts between bytestrings and their hexadecimal string representation.

Chell is a simple and intuitive library for automated testing. It natively supports assertion-based testing, and can use companion libraries such as chell-quickcheck to support more complex testing strategies.

This package provides a minimal host for SDL2-based Reflex applications.

This package provides Haskell bindings to the setlocale C function.

This package provides Haskell bindings to the the POSIX network database (<netdb.h>) API.

D-Bus is a simple, message-based protocol for inter-process communication, which allows applications to interact with other parts of the machine and the user's session using remote procedure calls. D-Bus is a essential part of the modern Linux desktop, where it replaces earlier protocols such as CORBA and DCOP. This library is an implementation of the D-Bus protocol in Haskell. It can be used to add D-Bus support to Haskell applications, without the awkward interfaces common to foreign bindings.

This library provides an easy way to define command line parsers.

This package provides low-level bindings to the zlib package.

This Haskell library provides a place for lots of orphan instances for the ghc-vector package.

Experimental Hspec support for testing WAI applications

This library provides access to system information and functionality to Lua scripts via Haskell's System module. Intended usage for this package is to preload it by adding the loader function to package.preload. Note that the Lua package library must have already been loaded before the loader can be added.

This library provides a utility function liftType, which accepts a type application argument and returns the Template Haskell Type representation of it.

This package provides access to platform dependent file locking APIs. There are alternative file locking packages:

• GHC.IO.Handle.Lock in base >= 4.10 is good enough for most use cases. However, uses only Handles so these locks cannot be used for intra-process locking.

• ghc-filelock doesn't support OFD locking.

This library provides the natural numbers for Haskell.

This package provides automatic formatting for Haskell files. Both a library and an executable.

This package implements utilities to perform atomic output so as to avoid the problem of partial intermediate files.