Applications and libraries/Program development

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This page contains a list of libraries and tools in a certain category. For a comprehensive list of such pages, see Applications and libraries.

Libraries and Tools for Program Development

Vital

Vital is a visual programming environment. It is particularly intended for supporting the open-ended, incremental style of development often preferred by end users (engineers, scientists, analysts, etc.).

hmake, a Haskell-aware replacement for make

Automatically keeps track of module dependencies (i.e. no need to write any Makefiles!). Can be used with any of the usual Haskell compilers (ghc, hbc, nhc98).

cpphs

Cpphs is a re-implementation (in Haskell) of the C pre-processor.

DrIFT

DrIFT is a tool which allows derivation of instances for classes that aren't supported by the standard compilers. In addition, instances can be produced in seperate modules to that containing the type declaration. This allows instances to be derived for a type after the original module has been compiled. As a bonus, simple utility functions can also be produced from a type.

HaskTags

Hasktags is a simple program that generates TAGS files for Haskell code. Together with a supporting editor (e.g. NEdit, XEmacs, or Vim) TAGS files can be used to quickly find the places where functions, data constructors etc. are defined.

tagsh

A version of the tags program for Haskell. It uses the standardised hssource and posix library, works with GHC 5.02.1. tags file has been checked to work with vim and nedit.

HaSpell

HaSpell is a spelling and style checker for Haskell programs. It can detect spelling errors in comments in the program text, and optionally in the code itself. There is an option to detect metasyntactic variables (such as 'foo') and 'bad function prefixes' such as 'compute' and 'doThe' - these make the program less readable and generally indicate bad programming style.

Haskell All-In-One

This Haskell utility takes a program implemented in multiple modules and converts it to a single module.

Integrated Development Environments

Haskell support for Eclipse

Eclipse is an open, extensible IDE platform for "everything and nothing in particular". It is implemented in Java and runs on several platforms. The Java IDE built on top of it has already become very popular among Java developers. The Haskell tools extend it to support editing (syntax coloring, code assist), compiling, and running Haskell programs from within the IDE. More features like source code navigation, module browsing etc. will be added in the future.

hIDE

hIDE is a GUI-based Haskell IDE written using gtk+hs. It does not include an editor but instead interfaces with NEdit, vim or GNU emacs.

hIDE-2

Through the dark ages many a programmer has longed for the ultimate tool. In response to this most unnerving craving, of which we ourselves have had maybe more than our fair share, the dynamic trio of #Haskellaniacs (dons, dcoutts and Lemmih) hereby announce, to the relief of the community, that a fetus has been conceived: hIDE - the Haskell Integrated Development Environment. So far the unborn integrates source code recognition and a chameleon editor, resenting these in a snappy gtk2 environment. Although no seer has yet predicted the date of birth of our hIDEous creature, we hope that the mere knowledge of its existence will spread peace of mind throughout the community as oil on troubled waters. See also: Screenshots of HIDE and HIDE

JCreator with Haskell support

JCreator is a highly customizable Java IDE for Windows. Features include extensive project support, fully customizable toolbars (including the images of user tools) and menus, increase/decrease indent for a selected block of text (tab/shift+tab respectively). The Haskell support module adds syntax highlighting for haskell files and winhugs, hugs, a static checker (if you double click on the error message, JCreator will jump to the right file and line and highlight it yellow) and the Haskell 98 Report as tools. Platforms: Win95, Win98, WinNT and Win2000 (only Win95 not tested yet). Size: 6MB. JCreator is a trademark of Xinox Software; Copyright © 2000 Xinox Software The Haskell support module is made by Rijk-Jan van Haaften.

Visual Haskell

Visual Haskell is a complete development environment for Haskell software, based on Microsoft's Microsoft Visual Studio platform. Visual Haskell integrates with the Visual Studio editor to provide interactive features to aid Haskell development, and it enables the construction of projects consisting of multiple Haskell modules, using the Cabal building/packaging infrastructure.

Dead

KDevelop (This link is dead. Fix it or remove it.)

This IDE supports many languages. For Haskell it currently supports (This link is dead. Fix it or remove it.) project management, syntax highlighting, building (with GHC) & executing within the IDE.

Editor Modes for syntax highlighting and more

Syntax highlighting files for KDE's Kate

• Files by Ralf Hinze.
• [hs.xml hs.xml] and [lhs.xml lhs.xml] by Brian Huffman.

NEdit syntax highlighting and block comment support.

vim syntax highlighting

• by Don Stewart: for TeX and cpp style Haskell files.
• by Ian Lynagh: distinguishes different literal Haskell styles.
• by John Williams: Both regular Haskell [haskell.vim .hs] and [lhaskell.vim .lhs] files that uncomment lines using '>' are supported.

Syntax highlighting file for textpad

by Jeroen van Wolffelaar and Arjan van IJzerdoorn, which inludes all prelude functions, datatype, constructors, etc, all in seperate groups.

Haskell Mode for Emacs

Supports font locking, declaration scanning, documentation of types, indentation and interaction with Hugs.

Alternative Hugs Mode for Emacs by Chris Van Humbeeck

Provides fontification and cooperation with Hugs. Updated for emacs 20.* by Adam P. Jenkins.

Dead

Haskell mode (This link is dead. Fix it or remove it.)

for jed by Marcin 'Qrczak' Kowalczyk.

Haskell mode For SubEthaEdit (This link is dead. Fix it or remove it.)

SubEthaEdit is a Mac OS X editor.

Some other, mostly obsolete, modes are available in CVS.

Typesetting Haskell in TeX

lambdaTeX

A TeX package for typesetting literate scripts in TeX. The output looks much like the code from Chris Okasaki's book "Purely Functional Data Structures", doing syntax highlighting and converting ASCII art such as -> or alpha to proper mathematical symbols. It should work with both LaTeX and plain TeX, and it does its magic without any annotations, directly on the source code (lambdaTeX uses an almost-complete Haskell lexical analyzer written entirely in plain TeX). You only have to add \input lambdaTeX at the top of your source file, and manually typeset your literate comments so they look as good as the source code.

Haskell Style for LaTeX2e

by Manuel Chakravarty provides environments and macros that simplify setting Haskell programs in LaTeX.

lhs2tex

A preprocessor for typesetting Haskell programs that combines some of the good features of pphs and smugweb. It generates LaTeX code from literate Haskell sources.

Shuffle

another tool helping literate programming in Haskell. It helps to maintain views in a literate programming project. For example, it is among the tools used for developing a compiler in an iterative way with manuals didactically reflecting these evolving series of versions deriving from the literal code (see Essential Haskell Compiler project). Thus, Shuffle gives us the possibility for making didactically the evolution of versions visible in the documentation, when this is needed. More generally, Shuffle gives us tangling and weaving possibilities of literate programming. I think it gives a way to think of literal program development in a more abstract way by supporting the concept of views (maybe a too far analogy: version control management -- e.g. darcs -- helps thinking of program development in a more abstract way, too). Shuffle works well together with lhs2tex.

haskell.sty

A Latex style file by Andrew Cooke that makes literal programming in Haskell simple.

Source documentation and browsing

Haddock A Haskell Documentation Tool

A tool for automatically generating documentation from annotated Haskell source code. It is primarily intended for documenting libraries, but it should be useful for any kind of Haskell code. Haddock lets you write documentation annotations next to the definitions of functions and types in the source code, in a syntax that is easy on the eye when writing the source code (no heavyweight mark-up). The documentation generated by Haddock is fully hyperlinked - click on a type name in a type signature to go straight to the definition, and documentation, for that type.

IDoc A No Frills Haskell Interface Documentation System

IDoc extracts interface documentation and declarations from Haskell modules based on standard Haskell layout rules and a small number of clues that the programmer embeds in interface comments. These clues have been designed to be visually non-imposing when displaying the source in a text editor. Interface documentation is rendered in standard markup languages (currently, only HTML is supported). IDoc has been designed to be simple to use and install.

HDoc

HDoc generates documentation in HTML format for Haskell modules. The generated documents are cross linked and include summaries and detailed descriptions for the documented functions, data types, type classes and instance declarations.

HaskellDoc

This program generates an HTML document showing the module interfaces of a Haskell project. Convenient links are placed for easy browsing of the different modules of the project, and for quick access to the source code.

Dead

The Haskell Module Browser(since 10/06/2003 via Internet Archive)

A browser similar to Smaltalk and Eiffel class browsers.

Testing

HUnit

A unit testing framework for Haskell, similar to JUnit for Java. With HUnit, the programmer can easily create tests, name them, group them into suites, and execute them, with the framework checking the results automatically. Test specification is concise, flexible, and convenient.

QuickCheck

A tool for testing Haskell programs automatically. The programmer provides a specification of the program, in the form of properties which functions should satisfy, and QuickCheck then tests that the properties hold in a large number of randomly generated cases. Specifications are expressed in Haskell, using combinators defined in the QuickCheck library. QuickCheck provides combinators to define properties, observe the distribution of test data, and define test data generators.

HTF - The Haskell Test Framework

The HTF lets you write HUnit tests and QuickCheck properties in an easy and convenient way. Additionally, the HTF provides a facility for testing programs by running them and comparing the actual output with the expected output (so called "file-based tests"). The HTF uses Template Haskell to collect all tests and properties, so you do not need to write boilerplate code for that purpose. Preprocessor macros provide you with file name and line number information for tests and properties that failed.

Tracing & debugging

Tracing gives access to otherwise invisible information about a computation. Conventional debuggers allow the user to step through the program computation, stop at given points and examine variable contents. This tracing method is quite unsuitable for Haskell, because its evaluation order is complex, function arguments are usually unwieldy large unevaluated expressions and generally computation details do not match the user's high-level view of functions mapping values to values.

Buddha

Buddha is a declarative debugger for Haskell 98 programs. It presents the evaluation of a Haskell program as a series of function applications. A typical debugging session involves a series of questions and answers. The questions are posed by the debugger, and the answers are provided by the user. The implementation of Buddha is based on program transformation.

Freja

A compiler for a subset of Haskell. Running a compiled program creates an evaluation dependency tree as trace, a structure based on the idea of declarative debugging from the logic programming community. A debugging session consists of the user answering a sequence of yes/no questions.

Hat

A Haskell program is first transformed by hat-trans and then compiled with nhc98 or ghc. At runtime the program writes a trace file. There are tools for viewing the trace in various ways: Hat-stack shows a virtual stack of redexes. Hat-observe shows top-level functions in the style of Hood. Hat-trail enables exploring a computation backwards, starting from (part of) a faulty output or an error message. Hat-detect provides algorithmic debugging in the style of Freja. Hat-explore allows free navigation through a computation similar to traditional debuggers and algorithmic debugging and slicing.

Hood

A library that permits to observe data structures at given program points. It can basically be used like print statements in imperative languages, but the lazy evaluation order is not affected and functions can be observed as well.

GHood

"Graphical Hood" - a Java-based graphical observation event viewer, building on Hood.