Zenoscript

A functional programming language that compiles to TypeScript, featuring Rust-inspired syntax, Elixir-style pattern matching, and seamless TypeScript interoperability.

Features

• Functional Programming: Immutable by default with let bindings
• Pipe Operations: Data transformation with |> operator
• Pattern Matching: Powerful match expressions with guards
• Atoms: Symbolic constants like Elixir (:ok, :error)
• Struct & Trait System: Similar to Rust's type system
• Zero Runtime Overhead: Compiles to clean TypeScript
• Mixed Syntax: Use alongside existing TypeScript/JavaScript

Installation

bun install
bun run build

Usage

CLI

# Transpile a file
zeno input.zs output.ts

# Output to stdout
zeno input.zs

# Show help
zeno --help

# Show tokens (debugging)
zeno --tokens input.zs

# Show AST (debugging)
zeno --ast input.zs

Programmatic

# Using bun directly
bun src/index.ts input.zs output.ts

Bun Plugin Integration

Zenoscript includes a Bun plugin for seamless .zs file integration:

// Import .zs files directly in TypeScript!
import { User, createUser } from "./types.zs";
import { processData } from "./handlers.zs";

// The .zs files are automatically transpiled to TypeScript
const user = createUser("Alice", "alice@example.com", 25);

The plugin is automatically loaded via bunfig.toml. Just run:

bun run examples/usage.ts

Language Syntax

Struct Declarations

struct User {
  name: string;
  email: string;
  age: number;
}

struct Container<T> {
  value: T;
}

Compiles to:

type User = {
  name: string;
  email: string;
  age: number;
};

type Container<T> = {
  value: T;
};

Trait Declarations

trait Serializable {
  serialize(): string;
  deserialize(data: string): Self;
}

Compiles to:

interface Serializable {
  serialize(): string;
  deserialize(data: string): Self;
}

Implementation Blocks

impl User {
  new(name: string, email: string, age: number) {
    return { name, email, age };
  }
}

impl Serializable for User {
  serialize() {
    return JSON.stringify(this);
  }
}

Let Bindings

let message = "Hello World"
let count = 42

Compiles to:

const message = "Hello World";
const count = 42;

Pipe Expressions

"  hello  " |> trim |> toUpperCase |> console.log
data |> processData |> validateResult |> saveToDatabase

Compiles to:

console.log("  hello  ".trim().toUpperCase());
saveToDatabase(validateResult(processData(data)));

Atoms and Pattern Matching

let status = :loading

let message = match status {
  :idle => "Ready to start"
  :loading => "Please wait..."
  :success => "Operation completed"
  :error when isRetryable => "Retrying..."
  :error => "Failed permanently"
  _ => "Unknown status"
}

Examples

See the examples/ directory for complete examples:

• examples/basic.zs - Basic language features
• examples/advanced.zs - Advanced functional programming patterns

Development

Building the Transpiler

The transpiler is written in C and compiled to build/zeno:

bun run build
# or manually:
cd src/transpiler && make

Running Tests

bun test

Scripts

bun run build    # Build the C transpiler
bun run clean    # Clean build artifacts
bun run test     # Run test suite
bun run dev      # Development mode with hot reload

Architecture

The transpiler follows a traditional compilation pipeline:

1. Lexer (lexer.c) - Tokenizes Zenoscript source code
2. Parser (parser.c) - Builds Abstract Syntax Tree (AST)
3. Code Generator (codegen.c) - Emits TypeScript code
4. CLI (cli.c) - Command-line interface

The Bun wrapper (src/index.ts) provides a seamless interface that automatically builds and runs the C transpiler.

Language Philosophy

• Mixed syntax support: Seamless integration with TypeScript/JavaScript
• Functional patterns: Inspired by Rust, Elixir, and functional programming
• Type safety: Leverages TypeScript's type system
• Immutability by default: Uses let for immutable bindings
• Zero runtime overhead: Compiles to native TypeScript constructs

Contributing

1. Fork the repository
2. Create your feature branch
3. Add tests for new functionality
4. Ensure all tests pass: bun test
5. Submit a pull request

License

MIT License - see LICENSE file for details.