Собственный интерпретатор

// Basic property setting and getting
class Spaceship {}
var falcon = Spaceship();
 
falcon.name = "Millennium Falcon";
falcon.speed = 75.5;
 
print "Ship details:";
print falcon.name;
print falcon.speed;

$ ./your_program.sh run test.lox
Ship details:
Millennium Falcon
75.5

// Multiple properties and conditional access
class Robot {}
var r2d2 = Robot();
 
r2d2.model = "Astromech";
r2d2.operational = false;
 
if (r2d2.operational) {
  print r2d2.model;
  r2d2.mission = "Navigate hyperspace";
  print r2d2.mission;
}

(No output because the condition is false)

// Multiple instances with properties
class Superhero {}
var batman = Superhero();
var superman = Superhero();
 
batman.name = "Batman";
batman.called = 18;
 
superman.name = "Superman";
superman.called = 66;
 
print "Times " + superman.name + " was called: ";
print superman.called;
print "Times " + batman.name + " was called: ";
print batman.called;

Times Superman was called:
66
Times Batman was called:
18

// Property manipulation in functions
class Wizard {}
var gandalf = Wizard();
 
gandalf.color = "Grey";
gandalf.power = nil;
print gandalf.color;
 
fun promote(wizard) {
  wizard.color = "White";
  if (true) {
    wizard.power = 100;
  } else {
    wizard.power = 0;
  }
}
 
promote(gandalf);
print gandalf.color;
print gandalf.power;

Grey
White
100