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

The premise of basic-prelude is that there are a lot of very commonly desired features missing from the standard Prelude, such as commonly used operators (<$> and >=>, for instance) and imports for common datatypes (e.g., ByteString and Vector). At the same time, there are lots of other components which are more debatable, such as providing polymorphic versions of common functions.

So basic-prelude is intended to give a common foundation for a number of alternate preludes. The package provides two modules: CorePrelude provides the common ground for other preludes to build on top of, while BasicPrelude exports CorePrelude together with commonly used list functions to provide a drop-in replacement for the standard Prelude.

Users wishing to have an improved Prelude can use BasicPrelude. Developers wishing to create a new prelude should use CorePrelude.

This library provides the functions to find unique and duplicate elements in a list.

This Haskell package provides an abstract interface to highly-parameterizable queues/deques.

Background: There exists a feature space for queues that extends between:

• Simple, single-ended, non-concurrent, bounded queues

• Double-ended, thread-safe, growable queues with important points in between (such as the queues used for work stealing).

This package includes an interface for Deques that allows the programmer to use a single API for all of the above, while using the type system to select an efficient implementation given the requirements (using type families).

This package also includes a simple reference implementation based on IORef and Data.Sequence.

This library lets you write interactive programs without callbacks or side-effects. Functional Reactive Programming (FRP) uses composable events and time-varying values to describe interactive systems as pure functions. Just like other pure functional code, functional reactive code is easier to get right on the first try, maintain, and reuse. Reflex is a fully-deterministic, higher-order FRP interface and an engine that efficiently implements that interface.

This package provides a pure interface for compressing and decompressing streams of data represented as lazy ByteStrings. It uses the zlib C library so it has high performance. It supports the zlib, gzip and raw compression formats. It provides a convenient high level API suitable for most tasks and for the few cases where more control is needed it provides access to the full zlib feature set.

This package provides an implementation of MurmurHash2, a good, fast, general-purpose, non-cryptographic hashing function. See https://sites.google.com/site/murmurhash/ for details. This implementation is pure Haskell, so it might be a bit slower than a C FFI binding.

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 defines the type class MonadBaseControl, a subset of MonadBase into which generic control operations such as catch can be lifted from IO or any other base monad.

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

This package provides a canonical anonymous 1-tuple type missing from Haskell for attaching typeclass instances.

There is also the OneTuple package which by using a boxed data-type provides a 1-tuple type which has laziness properties which are more faithful to the ones of Haskell's native tuples; whereas the primary purpose of Only is to provide the traditionally so named type-wrapper for attaching typeclass instances.

This library lets you derive automatically Haskell functions that let you query each endpoint of a <http://hackage.haskell.org/package/servant servant> webservice. . See <http://docs.servant.dev/en/stable/tutorial/Client.html the client section of the tutorial>. . <https://github.com/haskell-servant/servant/blob/master/servant-client/CHANGELOG.md CHANGELOG>.

This package provides Haskell library for matching files using patterns such as \"src\/**\/*.png\" for all @file.png files recursively under the @filesrc directory.

Some of its features include:

• All matching is O(n).

• Most functions pre-compute some information given only one argument.

• Uses match and substitute to extract suitable strings from the * and ** matches, and substitutes them back into other patterns.

• Uses step and matchMany to perform bulk matching of many patterns against many paths simultaneously.

• Uses System.FilePattern.Directory to perform optimised directory traverals using patterns.

This library provides some useful extensions for ghc-commonmark to parser core commonmark syntax: smart quotes, definition lists, tables, footnotes, math, and more.

This library provides profunctors for Haskell.

This library provides an efficient implementation of Int-indexed arrays (both mutable and immutable), with a powerful loop optimisation framework.

This package provides Haskell 98 groups. A group is a monoid with invertibility.

This is an industrial-strength monadic parser combinator library. Megaparsec is a feature-rich package that strikes a nice balance between speed, flexibility, and quality of parse errors.

Per Conor McBride, the Newtype typeclass represents the packing and unpacking of a newtype, and allows you to operate under that newtype with functions such as ala'.

This Haskell package provides Monomorphic variants of the Functor, Foldable, and Traversable typeclasses. If you understand Haskell's basic typeclasses, you understand mono-traversable. In addition to what you are used to, it adds on an IsSequence typeclass and has code for marking data structures as non-empty.

This Haskell package includes a thin sqlite3 wrapper based on the direct-sqlite package, as well as the entire C library, so there are no system dependencies.

The documentation of System.Environment.getProgName says that "However, this is hard-to-impossible to implement on some non-Unix OSes, so instead, for maximum portability, we just return the leafname of the program as invoked." This library tries to provide the missing path.

Pandoc is a Haskell library for converting from one markup format to another, and a command-line tool that uses this library. It can read and write Markdown and (subsets of) other formats, such as HTML, reStructuredText, LaTeX, DocBook, and many more.

Pandoc extends standard Markdown syntax with footnotes, embedded LaTeX, definition lists, tables, and other features. A compatibility mode is provided for those who need a drop-in replacement for Markdown.pl.

This package provides some handy Template Haskell splices for including the current git hash and branch in the code of your project. This is useful for including in panic messages, --version output, or diagnostic info for more informative bug reports.