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Within LTS Haskell 24.34 (ghc-9.10.3)
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First-class type families A library for type-level programming. See README.
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A new formatting library A new formatting library that tries to be simple to understand while still being powerful and providing more convenience features than other libraries (like functions for pretty-printing maps and lists, or a function for printing arbitrary datatypes using generics). A comparison with other libraries:
- printf (from Text.Printf) takes a formatting string and uses some type tricks to accept the rest of the arguments polyvariadically. It's very concise, but there are some drawbacks – it can't produce Text (you'd have to T.pack it every time) and it doesn't warn you at compile-time if you pass wrong arguments or not enough of them.
- text-format takes a formatting string with curly braces denoting places where arguments would be substituted (the arguments themselves are provided via a tuple). If you want to apply formatting to some of the arguments, you have to use one of the provided formatters. Like printf, it can fail at runtime, but at least the formatters are first-class (and you can add new ones).
- formatting takes a formatting template consisting of pieces of strings interleaved with formatters; this ensures that arguments always match their placeholders. formatting provides lots of formatters and generally seems to be the most popular formatting library here. Unfortunately, at least in my experience writing new formatters can be awkward and people sometimes have troubles understanding how formatting works.
- fmt (i.e. this library) provides formatters that are ordinary functions, and a bunch of operators for concatenating formatted strings; those operators also do automatic conversion. There are some convenience formatters which aren't present in formatting (like ones for formatting maps, lists, converting to base64, etc). Some find the operator syntax annoying, while others like it.
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Cairo bindings Bindings for Cairo, autogenerated by haskell-gi.
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Fast PostgreSQL driver with a flexible mapping API Root of the "hasql" ecosystem. This library provides connection management, execution of queries and mapping of parameters and results. Extended functionality such as pooling, transactions and compile-time checking is provided by extension libraries. For more details and tutorials see the readme. The API comes free from all kinds of exceptions. All error-reporting is explicit and is presented using the Either type. "hasql" requires you to have the "libpq" C-library installed to compile. Starting from version 1.7 of "hasql" it requires "libpq" of at least version 14. "libpq" comes distributed with PostgreSQL, so typically all you need is just to install the latest PostgreSQL distro. Despite the mentioned requirements for "libpq" "hasql" is compatible with a wide range of PostgreSQL servers with tests having been conducted starting from version 8.3.
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Contributed functionality for Hspec Contributed functionality for Hspec
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insert-ordered-containers Associative containers retaining insertion order for traversals. Associative containers retaining insertion order for traversals. The implementation is based on `unordered-containers`.
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Types for representing a structured document Text.Pandoc.Definition defines the Pandoc data structure, which is used by pandoc to represent structured documents. This module used to live in the pandoc package, but starting with pandoc 1.7, it has been split off, so that other packages can use it without drawing in all of pandoc's dependencies, and pandoc itself can depend on packages (like citeproc-hs) that use them. Text.Pandoc.Builder provides functions for building up Pandoc structures programmatically. Text.Pandoc.Generic provides generic functions for manipulating Pandoc documents. Text.Pandoc.Walk provides faster, nongeneric functions for manipulating Pandoc documents. Text.Pandoc.JSON provides functions for serializing and deserializing a Pandoc structure to and from JSON.
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pretty printer for data types with a 'Show' instance. Please see README.md.
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Safely output coloured text Safely output coloured text
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A binary serialisation library for Haskell values. This package (formerly binary-serialise-cbor) provides pure, efficient serialization of Haskell values directly into ByteStrings for storage or transmission purposes. By providing a set of type class instances, you can also serialise any custom data type you have as well. The underlying binary format used is the 'Concise Binary Object Representation', or CBOR, specified in RFC 7049. As a result, serialised Haskell values have implicit structure outside of the Haskell program itself, meaning they can be inspected or analyzed without custom tools. An implementation of the standard bijection between CBOR and JSON is provided by the cborg-json package. Also see cbor-tool for a convenient command-line utility for working with CBOR data.