The emgm package

[Tags: bsd3, library]

EMGM is a general-purpose library for generic programming with type classes.

The design is based on the idea of modeling algebraic datatypes as sum-of-product structures. Many datatypes can be modeled this way, and because they all share a common structure, we can write generic functions that work on this structure.

The library provides three main components:

  1. Common - A common foundation for building generic functions and adding support for datatypes. This includes the collection of datatypes (e.g. sum, product, unit) and type classes (e.g. Generic, Rep), that are used throughout the library. This is what you need to define your own generic functions, to add generic support for your datatype, or to define ad-hoc cases.

  2. Data - Support for using standard datatypes generically. Types such as [a], tuples, and Maybe are built into Haskell or come included in the standard libraries. EMGM provides full support for generic functions on these datatypes. The modules in this component are also useful as guides when adding generic support for your own datatypes.

  3. Functions - A collection of useful generic functions. These work with a variety of datatypes and provide a wide range of operations. For example, there is crush, a generalization of the fold functions. It is one of the most useful functions, because it allows you to flexibly extract the elements of a polymorphic container.

For more information on the EMGM library, see the homepage: http://www.cs.uu.nl/wiki/GenericProgramming/EMGM


Properties

Versions0.1, 0.2, 0.3, 0.3.1, 0.4
Dependenciesbase (>=3.0 && <4.0), template-haskell (<2.3) or
base (>=3.0 && <4.0), template-haskell (==2.3.*)
LicenseBSD3
Copyright(c) 2008 Universiteit Utrecht
AuthorSean Leather, José Pedro Magalhães, Alexey Rodriguez, Andres Löh
Maintainergenerics@haskell.org
Stabilityexperimental
CategoryGenerics
Home pagehttp://www.cs.uu.nl/wiki/GenericProgramming/EMGM
Executablestest
Upload dateFri Jan 30 13:22:38 UTC 2009
Uploaded bySeanLeather
Downloads328 total (34 in last 30 days)

Modules

[Index]

Flags

NameDescriptionDefault
th23Define a CPP flag that enables conditional compilation for template-haskell package version 2.3 and newer.Enabled
testEnable the test configuration: Build the test executable, reduce build time.Disabled
hpcEnable program coverage on test executable.Disabled
nolibDon't build the library. This is useful for speeding up the modify-build-test loop. With "-ftest" (only), the build command will build both the library and the test executable. With "-ftest -fnolib", the build command builds only the test executable.Disabled

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info

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