The doctest program checks examples in source code comments. It is modeled after doctest for Python, see the Doctest website.

Compatibility layer for Data.Array.Byte providing boxed wrappers for ByteArray and MutableByteArray and relevant instances for GHC < 9.4.

This package provides a simple wrapper to show the used CPU time of monadic computation with an IO base.

Runtime exceptions - as exposed in base by the Control.Exception module - have long been an intimidating part of the Haskell ecosystem. This package is intended to overcome this. It provides a safe and simple API on top of the existing exception handling machinery. The API is equivalent to the underlying implementation in terms of power but encourages best practices to minimize the chances of getting the exception handling wrong.

This Haskell package provides support for computations which consume random values.

Lifted-base exports IO operations from the base library lifted to any instance of MonadBase or MonadBaseControl. Note that not all modules from base are converted yet. The package includes a copy of the monad-peel test suite written by Anders Kaseorg.

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

This library provides tools for fast Unicode 12.1.0 normalization in Haskell (normalization forms C, KC, D, and KD).

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

This package provides portable implementations of parts of the unix package. This package re-exports the unix package when available. When it isn't available, portable implementations are used.

This package provides an abstract class to manipulate sequence of bytes. The use case of this class is abstracting manipulation of types that are just wrapping a bytestring with stronger and more meaniful name.

This package provides various extra monoid-related definitions and utilities, such as monoid actions, monoid coproducts, semi-direct products, "deletable" monoids, "split" monoids, and "cut" monoids.

This package provides Prism and Traversals for These.

This package provides a simple network library for all your connection needs. It provides a very simple API to create sockets to a destination with the choice of SSL/TLS, and SOCKS.

This library provides everything that microlens provides plus instances to make each, at, and ix usable with arrays, ByteString, and containers. This package is a part of the microlens family; see the readme on Github.

PCG is a family of simple fast space-efficient statistically good algorithms for random number generation. Unlike many general-purpose RNGs, they are also hard to predict. . This library implements bindings to the standard C implementation. This includes the standard, unique, fast and single variants in the pcg family. There is a pure implementation that can be used as a generator with the random package as well as a faster primitive api that includes functions for generating common types. . The generators in this module are suitable for use in parallel but make sure threads don't share the same generator or things will go horribly wrong.

This library provides extensible optionally-pure exceptions for Haskell.

This package provides a library that performs fast, accurate conversion between double precision floating point and text.

Most data types in the Haskell platform do not have Lift instances. This package provides orphan instances for containers, text, bytestring and vector.

FoldMap lists are lists represented by their foldMap function. FoldMap lists have O(1) cons, snoc and append, just like DLists, but other operations might have favorable performance characteristics as well. These wild claims are still completely unverified though.

A UTF8 layer for Strings. The utf8-string package provides operations for encoding UTF8 strings to Word8 lists and back, and for reading and writing UTF8 without truncation.

This Haskell library provides a two-dimensional zipper data structure for editing text. The structure represents the body of text and an editing cursor which can be moved through it, along with a set of editing transformations.

Text zippers are generalized over the set of data types that might be used to store lists of characters (e.g., String, T.Text, etc.). Implementations using both of these examples are provided.

This package provides a module to use Skylighting to perform syntax highlighting and display the results in Brick-based interfaces.

This package provides two simple conduit wrappers around STM channels: a source and a sink.