This library defines an existential type Some'. . @ data Some f where \ Some :: f a -> Some f @ . in few variants, and utilities to work with it. . If you are unsure which variant to use, use the one in "Data.Some" module.

This Haskell package lets you automatically generate lenses for data types; code was extracted from the lens package, and therefore generated lenses are fully compatible with ones generated by lens (and can be used both from lens and microlens).

The conduit package is a solution to the streaming data problem, allowing for production, transformation, and consumption of streams of data in constant memory. It is an alternative to lazy I/O which guarantees deterministic resource handling, and fits in the same general solution space as enumerator/iteratee and pipes.

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 powerful but simple way to measure software performance. It provides both a framework for executing and analysing benchmarks and a set of driver functions that makes it easy to build and run benchmarks, and to analyse their results.

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 several functions to quickly search for substrings in strict or lazy ByteStrings. It also provides functions for breaking or splitting on substrings and replacing all occurrences of a substring (the first in case of overlaps) with another.

Text styling for ANSI terminals using SGR codes, as defined by the <https://www.ecma-international.org/publications-and-standards/standards/ecma-48 ECMA-48> standard. . Supports foreground\/background color, bold\/faint intensity, italic, single\/double underline, strikethrough, frame, encircle, and overline escape sequences. Some styles may not work on your terminal. . Also features terminal detection, so redirecting styled output to a file will automatically strip the ANSI escape sequences.

This Haskell library provides a type class for the error function, erf, and related functions. Instances for Float and Double.

wordexp(3) wrapper library for Haskell to perform word expansion like a posix-shell.

Types that are parametric on a functor are like Barbies that have an outfit for each role. This package provides the basic abstractions to work with them comfortably.

This Haskell library provides a purely functional interface for statistics based on hmatrix and GSL.

The config-ini Haskell library exports some simple monadic functions to ease the parsing of .ini-style configuration files, and to write and update them in an efficient diff-minimal way. This means that if you parse a file, update a single field, and reserialize, that file should differ only in the field we changed and that's it: field order, comments, and incidental whitespace will remain unchanged. The library aims to produce human-readable error messages when things go wrong.

This package provides functions for converting emoji names to emoji characters and vice versa.

How does it differ from the emoji package?

• It supports a fuller range of emojis, including all those supported by GitHub

• It supports lookup of emoji aliases from emoji

• It uses Text rather than String

• It has a lighter dependency footprint: in particular, it does not require aeson

• It does not require TemplateHaskell

This package provides Data.Scientific, which provides the number type Scientific. Scientific numbers are arbitrary precision and space efficient. They are represented using scientific notation.

This library encourages an error-handling style that directly uses the type system, rather than out-of-band exceptions.

Parse jira wiki text into an abstract syntax tree for easy transformation to other formats.

This package endows Data.Time, from the time package, with several data types and functions for enhanced processing of timezones. For one way to create timezone series, see the ghc-timezone-olson package.

This library provides a SOCKS proxy (version 5) implementation.

This is a Haskell library for writing CGI programs.

This library provides functions for control flow inside of monads with anaphoric variants on if and when and a C-like switch function.

Network recv based on buffer pools

In Haskell you very often acquire values using the with... idiom using functions of type (a -> IO r) -> IO r. This idiom forms a Monad, which is a special case of the ContT monad (from transformers) or the Codensity monad (from kan-extensions). The main purpose behind this package is to provide a restricted form of these monads specialized to this unusually common case.

The reason this package defines a specialized version of these types is to:

• be more beginner-friendly,

• simplify inferred types and error messages, and:

• provide some additional type class instances that would otherwise be orphan instances

This package provides a Readable type class for reading data types from ByteString and Text. It also includes efficient implementations for common data types.