How to install Egison (Packages)

Linux users can install Egison with yum or dpkg by the following simple commands!

$ sudo yum install https://git.io/egison.x86_64.rpm https://git.io/egison-tutorial.x86_64.rpm

$ wget https://git.io/egison.x86_64.deb https://git.io/egison-tutorial.x86_64.deb
$ sudo dpkg -i ./egison*.deb

How to install Egison (Haskell Platform)

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.

If you are using Linux that has apt-get command, execute the following commands.

% sudo apt-get update
% sudo apt-get install haskell-platform libncurses5-dev

2. Install Egison via Hackage

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

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

3. Set PATH for your shell

If successfully installed, there will be an output where the binary file is generated as above. Please add new path to $PATH variable of your shell, to make your shell be able to find egison command. For example, if you are using bash, you will execute commands as follows.

% echo "PATH=\$PATH:/home/xxx/.cabal/bin" >> ~/.bashrc
% source ~/.bashrc

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) 2011-20XX Satoshi Egi
http://www.egison.org
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) 2013-20XX Satoshi Egi
http://www.egison.org
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.

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

What to do next...

Online Tutorial! View Demonstrations Back to Home