// Test global 

global g = 3;
assert_true(g == 3);

var v := g;
assert_true(v == 3);

global g = 2;
assert_true(g == 2);
assert_true(v == 2);

def f() {
  assert_true(g == 2);
}

f();


global &h = v;
assert_true(h == v)
v = 3;
assert_true(h == 3)