The doctest program checks examples in source code comments. It is modeled after doctest for Python (<https://docs.python.org/3/library/doctest.html>). . Documentation is at <https://github.com/martijnbastiaan/doctest-parallel#readme>.

This library provides Haskell bindings for checking currently mounted filesystems.

This is a compatibility package as @Generically@ and @Generically1@ newtypes are available since @base-4.17@ in GHC.Generics'.

This package provides extra instances for type-classes in the [indexed-traversable](https://hackage.haskell.org/package/indexed-traversable) package. . The intention is to keep this package minimal; it provides instances that formerly existed in @lens@ or @optics-extra@. We recommend putting other instances directly into their defining packages. The @indexed-traversable@ package is light, having only GHC boot libraries as its dependencies.

This package backports the Control.Monad.Except module from mtl (if using mtl-2.2.0.1 or earlier), which reexports the ExceptT monad transformer and the MonadError class.

This package should only be used if there is a need to use the Control.Monad.Except module specifically. If you just want the mtl class instances for ExceptT, use transformers-compat instead, since mtl-compat does nothing but reexport the instances from that package.

Note that unlike how mtl-2.2 or later works, the Control.Monad.Except module defined in this package exports all of ExceptT's monad class instances. Therefore, you may have to declare import Control.Monad.Except () at the top of your file to get all of the ExceptT instances in scope.

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

This library provides law-abiding lenses for Aeson, using microlens.

This library provides tools to calculate various string metrics efficiently.

This library provides backend-agnostic generation of client functions. For more information, see the README.

This package provides Haskell APIs to efficiently access the <https://www.unicode.org/ucd/ Unicode character database> (UCD). Performance is the primary goal in the design of this package. The Haskell data structures are generated programmatically from the UCD files.

This library provides implementations of concurrent FIFO queues (for both general boxed and primitive unboxed values) that are fast, perform well under contention, and offer a Chan-like interface. The library may be of limited usefulness outside of x86 architectures where the fetch-and-add instruction is not available.

This package is an enhancement of the Text.Regex library. It wraps the PCRE C library providing Perl-compatible regular expressions.

This package provides low-dependency functionality commonly needed by various Haskell streaming data libraries, such as conduit and pipes.

Lightweight pure data validation based on Applicative and Selective functors.

This package provides a basic random number generation library, including the ability to split random number generators.

A package for convenient access to high-resolution clock and timer functions of different operating systems via a unified API.

This package contains bindings to the SDL 2 library, in both high- and low-level forms. The SDL namespace contains high-level bindings, where enumerations are split into sum types, and we perform automatic error-checking. The SDL.Raw namespace contains an almost 1-1 translation of the C API into Haskell FFI calls. As such, this does not contain sum types nor error checking. Thus this namespace is suitable for building your own abstraction over SDL, but is not recommended for day-to-day programming.

Old-time is a package for backwards compatibility with the old time library. For new projects, the newer time library is recommended.

Takes an error-throwing expression and puts it back in the Maybe it belongs in.

Note that this suffers from the https://ghc.haskell.org/trac/ghc/ticket/5902. Buyer beware.

Get terminal window height and width without ncurses dependency.

The conduit package itself maintains relative small dependencies. The purpose of this package is to collect commonly used utility functions wrapping other library dependencies, without depending on heavier-weight dependencies. The basic idea is that this package should only depend on haskell-platform packages and conduit.

This package provides Prism and Traversals for These.

This package provides pure-Haskell utilities for dealing with XML with the conduit package.

This is a pretty printing library based on Wadler's paper A Prettier Printer. This version allows the library user to declare overlapping instances of the Pretty class.