ToyLang

ToyLang is interpreted high-level fully OOP language with Python-like syntax and dynamic typing.

Complex is better than complicated.

As a multi-paradigm language, ToyLang supports object-oriented and imperative programming styles both.

• As in Python, blocks of code are delimited by their indentation.
• Classes are declared with the class keyword.
• Methods can be defined anywhere using the def keyword.
• If a method takes no arguments, parenthesis can be skipped, like in Ruby.
• The last value evaluated in a method is its return value.
• Everything is an object.

$ gem install toylang

Run REPL:

toylang

or run file:

toylang your_code.tlg

# comment
println("Hello World")
"Hello World".println # Hello World

println(2 + 2 ** 5) # 34

def hello(name):
  "Hi, " + name + "!"

hello("Max").println # => Hi, Max!

a = 23
b = a + 2
println(b) # => 25

Hey = 5 # constant

if (2 > 1):
  println("Yeah!")
else:
  println("Something goes bad!")

if (false):
  print("Won't be printed")

Cycles:

a = 0
while (a != 3):
  println(a)
  a = a + 1
# => 0 1 2

OOP:

# class defination
class Klass:
  def my_method:
    true

# object creating
k = Klass.new
k.my_method.print # => true

# monkey patching
class Number:
  def ten:
    10

1.ten.println # => 10

class Number:
  def ten:
    11

1.ten.println # => 11

# inheritance
class Animal:
  def is_a_human:
    false
  def say:
    "..."

class Dog < Animal:
  def say:
    "Bark!"

dog = Dog.new
animal = Animal.new

println(animal.say)     # ...
println(dog.say)        # Bark!
println(dog.is_a_human) # false

To build and run this app locally you will need a few things:

• Install Ruby (tested on 2.6);
• Using Racc as parser

• Clone the repository

git clone --depth=1 https://github.com/maxbarsukov/toylang.git

• Install dependencies

cd toylang
bundle install

• Run

./bin/toylang input.tlg
# or
./bin/toylang

• RSpec

bundle exec rspec

• Rubocop

bundle exec rubocop

Bug reports and pull requests are welcome on GitHub at https://github.com/maxbarsukov/toylang. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the Toylang project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.