baba-lang

Yet another programming language, made in Python. Has nothing to do with the video game "Baba is You".

Right now in version 0.4.4.

Notes

• baba-lang is now in its 0.x versions. This means that later versions of baba-lang is not guaranteed to be backward compatible with the previous ones.
• baba-lang is written for educational purposes only; it is not meant to be used in production.

How to install and use baba-lang

Installing and running baba-lang is simple:

1. Prerequisites: Python 3 (At least 3.12 can be sure to work), Lark (see requirements.txt).
2. Either:

• Download the latest point release on GitHub (recommended, as it is stable)
• Clone the repository

git clone https://github.com/dangduomg/baba-lang.git

3. Set working directory to the project root.

cd baba-lang

4. (Optionally) Create and activate a virtual environment.

python3 -m venv .venv
source .venv/bin/activate

5. Install requirements.

pip install -r requirements.txt

6. Run src/main.py without arguments to open an interactive prompt. To run a source file, enter src/main.py <file>. Source files are of extension .bl. Run src/main.py -h for further help.

Features

• First-class functions
• Operators: ==, !=, <, <=, >, >=, +, -, *, /, %/%, %, **, &, |, ^, <<, >>, ~, unary +, unary -, function call, subscripting
• Logical operators: &&, ||, !
• In-place operators: =, +=, -=, *=, /=, %=, %/%=, **=, &=, |=, ^=, <<=, >>=
• Control flow constructs: if, while, do..while, C-style for, break, continue, functions
• Data types: integers, floats, strings, booleans, lists, dictionaries
• Modules
• Easy Python interop with py_function and py_method

Example

Here is an example snippet to get started:

min = py_function('builtins', 'min');

subjects = ['BABA', 'KEKE', 'DOOR', 'FLAG'];
verbs = ['HAS', 'HAS', 'IS', 'IS'];
objects = ['YOU', 'KEY', 'LOCK', 'WIN'];

// zipper
for (i = 0; i < min(subjects, verbs, objects); i += 1) {
    subject = subjects[i];
    verb = verbs[i];
    object = objects[i];
    if subject == 'BABA' && verb == 'HAS' {
        verb = 'IS';
    }
    print(subject + ' ' + verb + ' ' + object);
}

To-do list

• Rest and keyword arguments
• OOP (Inheritance)
• Iterators
• Exceptions
• Algebraic data types
• Package manager