​​原文​​

import std.stdio;
import std.format;

struct indexedPair {
  size_t x, y;
}

struct MyArray {
  bool[3][3] elements;

  ref opIndex(indexedPair i) {
    return elements[i.y][i.x];
  }
}

void main() {
  auto arr = MyArray();
  auto p = indexedPair(1, 1);

  arr[p] = true;
  writeln(arr);
}