GOLOX

Golox is a general purpose programming language. It is a Go implementation of Lox (by Robert Nystrom) with some differences

Getting started

Running the REPL

To run the REPL, simply type

go run .

Executing a file

To execute a file in the current directory use the -f flag

go run. -f test.glx

Usage example: Print fibonacci numbers

Demonstrating: if statements, functions, for loops, and recursive function calls

fun fib(n) {
  if (n <= 1) return n;
  return fib(n - 2) + fib(n - 1);
}
for (var i = 0; i < 20; i = i + 1) {
  print fib(i);
}

Output

0
1
1
2
..
4181

Usage example: Closures

Demonstrating the use of Closures

fun makeCounter() {
  var i = 0;
  fun count() {
    i = i + 1;
    print i;
  }

  return count;
}

var counter = makeCounter();
counter(); // "1".
counter(); // "2".

Output

1
2

Debug Mode

Add the flag -d to enable debug mode go run . -d

Interpret a file

It looks for the file, passed with the -f flag, in project root go run . -f test.glx