Fsk Language

Website docs https://fsk.kirosb.fr

FPM Gestionary package Website https://fpm.kirosb.fr

A custom interpreted programming language written in C++.

Features

• Dynamic Typing: Variables can hold any type of value.
• Functions: First-class functions with closures.
• Classes: Object-oriented programming with classes and inheritance.
• Standard Library: Built-in FSK object for system utilities.
• Import System: Modularize code with import.

Build

Requirements:

• CMake 3.10+
• C++ Compiler (C++17 recommended)

mkdir build
cd build
cmake ..
make

Global Installation (System-wide)

After building, you can install Fsk and FPM system-wide to run fsk and fpm from any directory.

Linux Installation

sudo mkdir -p /usr/local/lib/fsk/
sudo cp -r std /usr/local/lib/fsk/
sudo cp build/fsk /usr/local/bin/

sudo cp -r fpm /usr/local/lib/fsk/
echo '#!/bin/bash' | sudo tee /usr/local/bin/fpm
echo 'fsk /usr/local/lib/fsk/fpm/fpm.fsk "$@"' | sudo tee -a /usr/local/bin/fpm
sudo chmod +x /usr/local/bin/fpm

Windows Installation (PowerShell)

Run as Administrator:

New-Item -ItemType Directory -Force -Path "C:\Fsk"

Copy-Item -Recurse -Force "std" "C:\Fsk\"

[System.Environment]::SetEnvironmentVariable("Path", $env:Path + ";C:\Fsk", "User")

Copy-Item -Recurse -Force "fpm" "C:\Fsk\"
Set-Content -Path "C:\Fsk\fpm.bat" -Value '@fsk C:\Fsk\fpm\fpm.fsk %*'

Note: You will need to manually compile or download fsk.exe and place it in C:\Fsk\.

Usage

Run a script:

./fsk script.fsk

Interactive mode (REPL):

./fsk

Syntax Example

import "lib.fsk";

class Greeter {
  fn init(name) {
    this.name = name;
  }

  fn greet() {
    print "Hello, " + this.name + "!";
  }
}

let g = Greeter("World");
g.greet();

print "Random: " + FSK.random(1, 100);

Standard Library (FSK)

• FSK.random(min, max): Returns a random number between min and max.
• FSK.exec(command): Executes a shell command.
• FSK.version(): Returns the current version.
• FSK.sleep(ms): Pauses execution for ms milliseconds.

Self-Hosted Standard Library (std/)

Fsk comes with a standard library written in Fsk itself, located in the std/ directory. It is automatically loaded on startup.

List

A linked list implementation.

let list = List();
list.push(10);
list.push(20);
list.map(fn(x) { return x * 2; }).forEach(fn(x) { print x; });

Math

Math utilities.

print Math.max(10, 20); // 20
print Math.pow(2, 3); // 8

Web Server

Fsk includes a native HTTP server! You can run the self-hosted documentation:

./build/fsk docs/server.fsk

Visit https://fsk.kirosb.fr to see the documentation served by Fsk itself.

Example Server

fn handler(req) {
  return "<h1>Hello from Fsk!</h1>";
}

FSK.startServer(3000, handler);

Anonymous Functions (Lambdas)

Fsk supports anonymous functions, useful for callbacks and functional programming.

let double = fn(x) { return x * 2; };
print double(5); // 10