Property overwriting not working?

[danutavadanei]

Description

The solidity compiler accepts inheritance overloading of both modifiers and functions. But what about properties?

Check this example:

pragma solidity ^0.4.18;

contract Animal {
    uint256 public age;
    
    function getAnimalAge() public constant returns (uint256) {
        return age;
    }
}


contract Dog is Animal {
    uint256 public age;
    
    function Dog(uint256 _age) public {
        age = _age;
    }
    
    function getDogAge() public constant returns (uint256) {
        return age;
    }
}

In this case, by initializing Dog contract with age 20 one would expect that Animal age property to be 20, right? No, this doesn't happen. Calling getDogAge function will return 20 and calling getAnimalAge will return 0.

I know solidity inheritance doesn't work as in other standard programming languages but shouldn't the inherit from properties that are overloaded to have the value assigned in the child?

You can test that out here.

[chriseth]

Might be the same as #2563

[wbt]

See also #3675.

[Marenz]

This example now gives an error when you try to override the property. I assume that finishes this ticket, if you feel different please re-open and discuss with us :)