This is a Haskell library to derive Template Haskell's Lift class for datatypes.

This library uses GHC.Generics to derive efficient optics (traversals, lenses and prisms) for algebraic data types in a type-directed way, with a focus on good type inference and error messages when possible. The library exposes a van Laarhoven interface. For an alternative interface, supporting an opaque optic type, see generic-optics.

This is a simple time library providing a simple but powerful and performant API. The backbone of the library are the Timeable and Time type classes. Each Timeable instances can be converted to a type that has a Time instances, and thus are different representations of current time.

This package provides a regular expression toolkit for regex-base with compile-time checking of regular expression syntax, data types for matches and captures, a text replacement toolkit, portable options, high-level AWK-like tools for building text processing apps, regular expression macros with parsers and test bench, comprehensive documentation, tutorials and copious examples.

This package provides a simple interface for building .dot graph files, for input into the dot and graphviz tools. It includes a monadic interface for building graphs.

ResourceT is a monad transformer which creates a region of code where you can safely allocate resources.

This package provides ANSI terminal support for Haskell. It allows cursor movement, screen clearing, color output showing or hiding the cursor, and changing the title.

libyaml C source code for yaml bindings.

Pretty-simple is a pretty printer for Haskell data types that have a Show instance.

This library provides fast base64 encoding and decoding for Haskell ByteStrings.

This package provides the core modules underlying diagrams, an embedded domain-specific language for compositional, declarative drawing.

Parsing of aeson's Value with attoparsec, originally from aeson.

This is a set of macros to be used when writing Haskell FFI. They were designed to be able to fully describe C interfaces, so that hsc2hs can extract from them all Haskell code needed to mimic such interfaces. All Haskell names used are automatically derived from C names, structures are mapped to Haskell instances of Storable, and there are also macros you can use with C code to help write bindings to inline functions or macro functions.

This library provides functions for parsing and pretty printing Roman numerals. Because the notation of Roman numerals has varied through the centuries this package allows for some customisation using a configuration that is passed to the conversion functions.

This Haskell library provides simple read-only access to the local computer's networking configuration. It is currently capable of getting a list of all the network interfaces and their respective IPv4, IPv6 and MAC addresses.

List type for Lua, with a Haskell interface.

This library provides peek and poke functions for network byte order.

Safe conversions between textual types

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

GLib is a collection of C data structures and utility functions for the GObject system, main loop implementation, for strings and common data structures dealing with Unicode. This package only binds as much functionality as required to support the packages that wrap libraries that are themselves based on GLib.

The options package lets library and application developers easily work with command-line options.

Reasonably fast data encoding library.

A test framework for Haskell, inspired by and (almost) a drop-in replacement for Hspec. It has a number of powerful features and integrations, such as interactive terminal user interface for viewing test progress and built-in profiling support.

This is a small wrapper around the directory, unix, and Win32 packages, for use with system-filepath. It provides a consistent API to the various versions of these packages distributed with different versions of GHC. In particular, this library supports working with POSIX files that have paths which can't be decoded in the current locale encoding.