• small (less than 10'000 lines of idiomatic C++20)
• a scripting language
• portable, compile once, run your bytecode anywhere
• functional, every argument is passed by copy
• homoiconic, you can manipulate code with macros
• extensible, through C++ plugins

• async/await on any function
• no hidden references
• tail call and unused variable optimization
• a REPL with autocompletion and coloration
• a standard library in ArkScript and C++
• only need to learn 9 keywords
• docker images: stable, nightly

(let fibo (fun (n)
  (if (< n 2)
    n
    (+ (fibo (- n 1)) (fibo (- n 2))))))
 
(print (fibo 28))  # display 317811

CompilationError: Unbound variable error "fib" (did you mean "fibo"?)
In file fibonacci.ark
On line 7:12, got `(Symbol) fib'
   4 |     n
   5 |     (+ (fibo (- n 1)) (fibo (- n 2))))))
   6 | (while continue {
   7 |   (print (fib 28))
     |           ^^^
   8 |   (if (< (/ (random) 32768) 0.1)
   9 |     (set continue false))

Version:   4.0.0
Timestamp: 1716661603
SHA256:    dac188c0b6e985817da6b61f2df6f95603b3b8fbdb7f4bdd6862534f1a3e52

Symbols table (length: 3)
0) foo
1) a
2) b

Constants table (length: 2)
0) (PageAddr) 1
1) (Number) 3.000000

Code segment 0 (length: 8)
0 00 02 00 00 LOAD_CONST (PageAddr) 1
1 00 05 00 00 LET foo
2 00 02 00 01 LOAD_CONST (Number) 3.000000
3 00 01 00 00 LOAD_SYMBOL foo
4 00 0a 00 01 CALL (1)
5 00 0c 00 09 BUILTIN print
6 00 0a 00 01 CALL (1)
7 00 09 00 00 HALT

Code segment 1 (length: 5)
0 00 0d 00 01 MUT a
1 00 0d 00 02 MUT b
2 00 0c 00 02 BUILTIN nil
3 00 08 00 00 RET
4 00 09 00 00 HALT

#include <Ark/Ark.hpp>
 
int main()
{
    // A state can be shared by multiple VM ; they can't overwrite it
    Ark::State state;
 
    // This will compile the code, but you can also give a file with state.doFile()
    state.doString("(let foo (fun (x y) (+ x y 2)))");
    // You can register C++ function (only before calling vm.run())
    state.loadFunction("cpp_foo", [](std::vector<Ark::Value>& args, Ark::VM* vm) {
        return Ark::Value(static_cast<int>(args.size()));
    });
 
    Ark::VM vm(state);
    vm.run();
 
    auto value = vm.call("foo", 5, 6.0);
    // displays 13
    std::cout << value << "\n";
 
    return 0;
}

• TheCountVEVO
• llexto
• COUR Eloïse
• AKPINAR Dylan
• Ryan C. Gordon through the 2022 Microgrant

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