VecI32.generate constructor
Implementation
factory VecI32.generate(int length, int Function(int i) generator) {
  final p = ccore.std_VecI32_new(length);
  for (var i = 0; i < length; i++) {
    ccore.std_VecI32_set(p, i, generator(i));
  }
  return VecI32.fromPointer(p, length: length);
}