Haddock (software) explained

Haddock
Developer:	Simon Marlow
Released:	May 1, 2002
Operating System:	Cross-platform
Platform:	x86, PowerPC
Programming Language:	Haskell
Genre:	Documentation generation
License:	BSD-style license
Website:	http://haskell.org/haddock/

Haddock is a free, portable^[1] command-line program documentation generator for Haskell.

Software

It is influenced by IDoc,^[2] HDoc,^[3] and Doxygen.^[4] It produces hyperlinked HTML files from annotated Haskell (the documentation is embedded in comments) source files, with additional information extracted from type annotations; it supports only partially generating documentation in SGML. It is often used in conjunction with darcs and Cabal. It is dependent on Glasgow Haskell Compiler (GHC), using a modified form of the HsParser (written in Happy) parser for Haskell included in GHC. Its lightweight markup is based on IDoc's.^[5] Haddock is contained in the Haskell Platform.

It is used by the GHC, Gtk2Hs and HTk projects,^[6] as well as xmonad.

Here is an example of Haddock markup: -- | This is the documentation for 'square', which -- uses the (*) operator from "Prelude". -- It multiplies the @x@ argument against itself. square :: Integer -> Integer square x = x*x

Notes and References

Haddock runs on POSIX-compliant operating systems and Microsoft Windows.
Web site: IDoc Manual - Installation. www.cse.unsw.edu.au.
Web site: Homepage of Armin Größlinger. www.fmi.uni-passau.de.
Web site: 1.3. Contributors. haskell.org.
http://www.haskell.org/~simonmar/papers/haddock.pdf "Haddock: A Haskell Documentation Tool"
"Haddock is being used to document the new hierarchical Haskell libraries. The documentation generated for the libraries shipped with the latest release of GHC is here. The Gtk2Hs project is using Haddock to build reference documentation. The HTk project is using Haddock to generate its library documentation." From the Haddock homepage.