// SPDX-License-Identifier: Apache 2.0
pragma solidity 0.8.19;
contract TestSlot {
  // 0
  uint public count = 123;
  // 1.1
  address public owner = msg.sender;
  // 1.2
  bool public isTrue = true;
  // 1.3
  uint16 public u16 = 31;
  // 2
  bytes32 private password;
  uint public constant someConst = 123;
  // 3, 4, 5
  bytes32[3] public data;
  struct User {
    uint id;
    bytes32 password;
  }
  // 6: length of users
  User[] private users;
  // 7: empty,
  mapping(uint => User) private idToUser;
  constructor(bytes32 _password) {
    password = _password;
  }
  function addUser(bytes32 _password) public {
    User memory user = User({id: users.length, password: _password});
    users.push(user);
    idToUser[user.id] = user;
  }
  function getArrayLocation(uint slot, uint index, uint elementSize) public pure returns (uint) {
    return uint(keccak256(abi.encodePacked(slot))) + (index * elementSize);
  }
  function getMapLocation(uint slot, uint key) public pure returns (uint) {
    return uint(keccak256(abi.encodePacked(key, slot)));
  }
}