How to install Egison

1. Install Haskell Platform

To install Egison, you need to install Haskell Platform. This is because Egison is implemented in Haskell and distributed as a Hackage package.

You can download an installer from here.

2. Install Egison via Hackage

After you installed Haskell Platform, perform the following commands in Command Prompt.

% cabal update
% cabal install egison egison-tutorial
Installing executable(s) in /home/xxx/.cabal/bin
Registering egison-X.X.X...

The egison and egison-tutorial commands are installed in ~/.cabal/bin/ by the above the package.
So please add the following lines to your .bashrc or .zshenv.

export PATH

How to start Egison

Now, you can run Egison interpreter with the egison command. Type Control-D to terminate the interpreter.

% egison
Egison Version X.X.X (C) 2011-2014 Satoshi Egi
Welcome to Egison Interpreter!
> ^D
Leaving Egison Interpreter.

You can run the egison-tutorial command, too. Type Control-D to terminate the tutorial.
This is a tutorial command for beginner. Please try it first!

% egison-tutorial
Egison Tutorial for Version X.X.X (C) 2013-2014 Satoshi Egi
Welcome to Egison Tutorial!
List of sections in the tutorial
1: Calculate numbers
2: Basics of functional programming
3: Define your own functions
4: Basic of pattern-matching
5: Pattern-matching against infinite collections
6: Writing scripts in Egison
Choose a section to learn.
(1-6): 5
We can write a pattern-matching against infinite lists even if that has infinite results.
Note that Egison really enumerate all pairs of two natural numbers in the following example.

  (take 10 (match-all nats (set integer) [> [m n]]))

What to do next...

Online Tutorial! View Demonstrations Back to Home