This package provides Haskell modules for accessing and manipulating fields of records.

Turtle is a reimplementation of the Unix command line environment in Haskell so that you can use Haskell as both a shell and a scripting language. Features include:

• Batteries included: Command an extended suite of predefined utilities.

• Interoperability: You can still run external shell commands.

• Portability: Works on Windows, OS X, and Linux.

• Exception safety: Safely acquire and release resources.

• Streaming: Transform or fold command output in constant space.

• Patterns: Use typed regular expressions that can parse structured values.

• Formatting: Type-safe printf-style text formatting.

• Modern: Supports text and system-filepath.

Read "Turtle.Tutorial" for a detailed tutorial or "Turtle.Prelude" for a quick-start guide. Turtle is designed to be beginner-friendly, but as a result lacks certain features, like tracing commands. If you feel comfortable using turtle then you should also check out the Shelly library which provides similar functionality.

This library provides finger trees, a general sequence representation with arbitrary annotations, for use as a base for implementations of various collection types. It includes examples, as described in section 4 of Ralf Hinze and Ross Paterson, "Finger trees: a simple general-purpose data structure".

This package provides a plotting library for Haskell, using gnuplot for rendering.

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.

This package provides a compatibility layer for using GHC call stacks with different versions of the compiler.

More complex tests for chell.

This library provides the Data.Primitive.Addr module that was a part of the primitive library before primitive-0.7.0.0.

This package provides a library for generating 2D charts and plots, with backends provided by the Cairo and Diagrams libraries.

This library provides a fast logging system for Haskell.

The zip-archive library provides functions for creating, modifying, and extracting files from zip archives in Haskell.

Utilities to package up Haskell functions and values into a Lua module. . This package is part of HsLua, a Haskell framework built around the embeddable scripting language <https://lua.org Lua>.

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

This package provides tools to parse and produce literals efficiently from strict or lazy bytestrings.

Implementation of bidirectional TOML serialization.

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 package provides a Template Haskell splice that expand to the value of an environment variable. This can be used to embed build-time parameters in the application.

vty is a terminal GUI library in the niche of ncurses, intended to be easy to use and to provide good support for common terminal types.

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.

Provides an efficient Haskell implementation of Peano numbers

This package provides a compatibility layer for GHC's wherefrom function, which exposes info provenance information. Each major version of this library exports a different version of this interface.

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

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.