goby

README

rooby

rooby is a Ruby-like object oriented language written in Go. You can think it as a simplified, compilable Ruby for now.

We're looking for contributors now, join us and make this project better!

Goal

I want to build a language that focuses on developing microservices. Which should be performant and easy to write. This is why rooby has Ruby's user friendly syntax and is written in Go.

Questions

A lot people have questions about rooby since it's a new language and you may get confused by the way I describe it (sorry for that 😢). Here's a list of frequently asked questions.

Supported features

• Can be compiled into bytecode (with .robc extension)
• Can evaluate bytecode directly
• Everything is object
• Support comment
• Object and Class
  • Top level main object
  • Constructor
  • Support class method
  • Support inheritance
  • Support instance variable
  • Support self
• Variables
  • Constant
  • Local variable
  • Instance variable
• Method
  • Support evaluation with arguments
  • Support evaluation without arguments
  • Support evaluation with block (closure)
• BuiltIn Data Types (All of them are classes 😀)
  • Class
  • Integer
  • String
  • Boolean
  • nil
  • Hash
  • Array
• Flow control
  • If statement
  • while statement
• Import other files
  • require_relative
• IO
  • puts
  • ARGV

(You can open an issue for any feature request)

TODO & WIP

Checkout this issue for what we will work on before first release.

Also see github projects

Install

1. You must have Golang installed
2. You must have set $GOPATH
3. Add your $GOPATH/bin into $PATH
4. Run following command

$ go get github.com/rooby-lang/rooby

Usage

Execute rooby file using VM

(might see errors on sample-6 since vm hasn't support block yet)

$ rooby ./samples/sample-1.ro
#=> 16

Compile rooby code

$ rooby -c ./samples/sample-1.ro

You'll see sample-1.robc in ./samples

Execute bytecode

$ rooby ./samples/sample-1.robc

Try it!

(See sample directory)

$ rooby ./samples/sample-1.ro
$ rooby ./samples/sample-2.ro
$ rooby ./samples/sample-3.ro
$ rooby ./samples/sample-4.ro
$ rooby .....

Development & Contribute

See the guideline

References

I can't build this project without these resources, and I highly recommend you to check them out if you're interested in building your own languages

• Write An Interpreter In Go
• Nand2Tetris II
• Ruby under a microscope
• YARV's instruction table

Maintainers

• @st0012
• @janczer

Sample snippet.

class User
  def initialize(name, age)
    @name = name
    @age = age
  end

  def name
    @name
  end

  def age
    @age
  end

  def say_hi(user)
    puts(@name + " says hi to " + user.name)
  end

  def self.sum_age(user1, user2)
    user1.age + user2.age
  end
end

stan = User.new("Stan", 22)
john = User.new("John", 40)
puts(User.sum_age(stan, john)) #=> 62
stan.say_hi(john) #=> Stan says hi to John

Build a stack using rooby

class Stack
  def initialize
    @data = []
  end
    
  def push(x)
    @data.push(x)
  end
    
  def pop
    @data.pop
  end
    
  def top
    @data[@data.length - 1]
  end
end

s = Stack.new
s.push(1)
s.push(2)
s.push(3)
s.push(4)
s.push(10)
puts(s.pop) #=> 10
puts(s.top) #=> 4

Block support

class Car
  def initialize
    yield(self)
  end
  
  def color=(c)
    @color = c
  end
  
  def color
    @color
  end
  
  def doors=(ds)
    @doors = ds
  end
  
  def doors
    @doors
  end
end
 
car = Car.new do |c|
  c.color = "Red"
  c.doors = 4
end
 
puts("My car's color is " + car.color + " and it's got " + car.doors.to_s + " doors.")