Obsidian Language v0.0.3

Obsidian is a compiled programming language that combines memory safety, zero-cost abstractions, and minimalist syntax. Built for developers who want the speed of Rust without the boilerplate.

This is a toy implementation (v0.0.1) written in Python. It features a lexer, parser, AST, and a transpiler to Python (which simulates "compilation" by generating and executing equivalent Python code). Published on PyPI as obsidian-lang.

Features (v0.0.3)

• Minimalist syntax inspired by Rust
• Variables with let (optional type hints, e.g. let x: int = 5;)
• Functions with fn
• Basic expressions + comparison operators (< > <= >= == !=)
• Control flow with if / else
• Control flow with while
• Boolean literals (true/false) and logical operators (and, or, not)
• Line comments (# ... to end of line)
• Function calls (including built-in println)
• Optional semicolons (statements can omit ; at end of line)

v0.0.3 update: Added support for line comments (# ...). Added boolean literals (true/false) and logical operators (and/or/not).

Installation

pip install obsidian-lang

Usage

# After pip install obsidian-lang
obsidian examples/hello.obs --show-code

# Or from source (development)
PYTHONPATH=. python -m obsidian.main examples/hello.obs --show-code

Example (hello.obs)

fn main() {
    let x = 5;
    let y = x + 3;
    println(y);
    println("Hello from Obsidian!");
}

Example (while.obs)

fn main() {
    let i: int = 0
    while i < 3 {
        println(i)
        let i = i + 1
    }
    println("while loop done")
}

# top level comment
fn main() {
    let x = 42  # trailig comment
    # comment inside function
    println(x)  # should print 42
    let y = true  # bool with comment
    if y {
        println("ok")  # if comment
    }
}