Undâr Programming Language

A statically-typed permacomputing-oriented language for the purpose of creating 1st generation style 3D games and graphical user interfaces that work on constrained systems, microcontrollers, retro consoles, and the web using emscripten. It runs on the Reality Engine a 32 bit VM written in C89.

Install

git clone https://git.alfrescocavern.com/zongor/undar-lang.git
cd undar-lang && make
./build/linux/undar-linux-debug ./test/hello.ul.ir

Hello World

/**
 * 'Low level' IR syntax (WIP) 
 */
global str terminal_namespace = "/dev/term/0";
global str new_line = "\n";
global str hello = "nuqneH 'u'?";

function main () {
  str msg $0;

  load_address hello -> msg;
  call pln (msg);
  exit 0;
}

function pln (str message $0) {
  plex term $1;
  int msg_length $2;
  str nl $3;
  int nl_length $4;
  int mode $5;
  str term_ns $6;

  load_immediate 0 -> mode;
  load_address terminal_namespace -> term_ns;
  syscall OPEN term_ns mode term;
  string_length message -> msg_length;
  syscall WRITE term message msg_length;
  load_address new_line -> nl;
  string_length nl -> nl_length;
  syscall WRITE term nl nl_length;
  return;
}

/**
 * High level C-like syntax (WIP)
 */
use <terminal>;

function main(int argc, str[] argv) {
  str name = "'u'";
  if (argc > 1) {
      name = argv[1];
  }
  pln("nuqneH, {name}?");
  return 0;
}

Philosophy

• No dynamic memory - memory is static, stack only allocation.
• First-class arrays - Fortran-style, row-major.
• Plexes - Symbolic data containers.
• Tunnels - 9p inspired unified I/O: files, sockets, devices, APIs.

Development Timeline

Inspired by

Uxn, Plan 9, Dusk OS, Dis VM Forth, Lisp, Fortran, C, Zig, Lua, Lox,