6  Resources

6.1  Software

Many programming assignments will be done with Haskell, here are a few pointers to get you started.

• Haskell Wiki: http://haskell.org
• Glasgow Haskell Compiler
• Haskell “cheat sheet” for quick reference of Prelude functions
• The name of this tutorial raises hopes for a smooth ride: Gentle Introduction to Haskell
• The Parsec parser generator

6.1.1  Using GHC

An easy way to interact with GHC is to edit your document, say, Foo.hs in your favourite editor (== Emacs, with haskell-mode), and invoke the GHC interpreter in a shell window:

> ghci -fglasgow-exts

The most commonly used commands are

• :l Foo to load the module Foo (from your file Foo.hs)
• :r to re-load the previously loaded module
• :i x to inspect the value, type, ... x
• :q to quit the interpreter

The compiler is invoked, for example as:

> ghci -fglasgow-exts --make

The --make option chases automatically which modules need to be recompiled, so you don't have to write a Makefile yourself. (Also GHC's analysis of what need to be recompiled is more fine grained, thus faster).