When inheriting from multiple contracts with the same method sometimes I am asked (by the IDE and the compiler) to override a function which is declared in both contracts.

This usually happens when the "parents" my contract is inheriting from implement the IERC165 interface. In this case I have some code which looks like the following lines (which is ERC721):

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

In this example this function overrides an implementation contract and an abstract one, but in other cases I had to implement a function which overrides two implementation contracts.

In that situation what does the "super" keyword refer to? I am confused because it seems like super refer to a father contract, but in this case there are more than one, so I don't know how to determine to which one super refers to.

Thanks

When inheriting from multiple contracts with the same method sometimes I am asked (by the IDE and the compiler) to override a function which is declared in both contracts.

This usually happens when the "parents" my contract is inheriting from implement the IERC165 interface. In this case I have some code which looks like the following lines (this is ERC721):

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

In this example this function overrides an implementation contract and an abstract one, but in other cases I had to implement a function which overrides two implementation contracts.

In that situation what does the "super" keyword refer to? I am confused because it seems like super refer to a father contract, but in this case there are more than one, so I don't know how to determine to which one super refers to.

Thanks