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Within LTS Haskell 24.55 (ghc-9.10.3)
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Haskell string/text/bytestring interpolation that just works Unicode-aware string interpolation that handles all textual types. See the README at https://gitlab.com/williamyaoh/string-interpolate/blob/master/README.md for more info.
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Hspec support for the Tasty test framework. This package provides a Tasty provider for Hspec test suites.
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Self-documenting encoder and decoder Self-documenting encoder and decoder
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Dependent sum type A dependent sum is a generalization of a particular way of thinking about the Either type. Either a b can be thought of as a 2-tuple (tag, value), where the value of the tag determines the type of the value. In particular, either tag = Left and value :: a or tag = Right and value :: b. This package allows you to define your own dependent sum types by using your own "tag" types.
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Combinators for working with sums Combinators for working with sums.
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Exceptions which are explicit in the type signature. Synchronous and Asynchronous exceptions which are explicit in the type signature. The first ones are very similar to Either and Control.Monad.Error.ErrorT. The second ones are used for System.IO.readFile and System.IO.hGetContents. This package is a proposal for improved exception handling in Haskell. It strictly separates between handling of exceptional situations (file not found, invalid user input, see http://wiki.haskell.org/Exception) and (programming) errors (division by zero, index out of range, see http://wiki.haskell.org/Error). Handling of the first one is called "exception handling", whereas handling of errors is better known as "debugging". For applications see the packages midi, spreadsheet, http-monad. Although I'm not happy with the identifier style of the Monad Transformer Library (partially intended for unqualified use) I have tried to adopt it for this library, in order to let Haskell programmers get accustomed easily to it. See also: unexceptionalio
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Generic Programming using True Sums of Products A library to support the definition of generic functions. Datatypes are viewed in a uniform, structured way: the choice between constructors is represented using an n-ary sum, and the arguments of each constructor are represented using an n-ary product. The module Generics.SOP is the main module of this library and contains more detailed documentation. Since version 0.4.0.0, this package is now based on sop-core. The core package contains all the functionality of n-ary sums and products, whereas this package provides the datatype-generic programming support on top. Examples of using this library are provided by the following packages:
- basic-sop basic examples,
- pretty-sop generic pretty printing,
- lens-sop generically computed lenses,
- json-sop generic JSON conversions.
- Edsko de Vries and Andres Löh. True Sums of Products. Workshop on Generic Programming (WGP) 2014.
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Criterion benchmarks for generators Criterion benchmarks for generators
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Source code suggestions HLint gives suggestions on how to improve your source code.
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Kan extensions, Kan lifts, the Yoneda lemma, and (co)density (co)monads Kan extensions, Kan lifts, various forms of the Yoneda lemma, and (co)density (co)monads.