Solidity-Type address not convertible to type uint256

Question

I created an array of structures and then tried to get the values of each account of an array. But I failed with an array while passing the address variable which contains msg.sender and the type is not visibly convertible to uint256. How can I do it?

Answer 1

As of Solidity v0.8, you can no longer cast explicitly from address to uint256.

You can now use:

uint256 i = uint256(uint160(address(msg.sender)));

function f(address a) internal pure returns (uint256) {
  return uint256(uint160(a));
}

Answer 2

You can cast it explicitly:

uint256 i = uint256(msg.sender);

---

function f(address a) constant returns (uint256) {
    return uint256(a);
}

Answer 3

Pre v0.8.0 of Solidity you could do:

pragma <0.8.0;

return address(toUint(item));

Post v0.8.0 of Solidity you must now do:

pragma ^0.8.0

return address(uint160(toUint(item)));

• References

address(uint) and uint(address): converting both type-category and width. Replace this by address(uint160(uint) and uint(uint160(address)) respectively.

see v0.8.0 breaking changes, Solidity Documentation