Cannot calculate selector of function named transfer

[fulldecent]

Test case

pragma solidity ^0.4.20;

contract Selector {
    function transfer(address, uint) external;
    function calculateSelector() public pure returns (bytes4) {
        return this.transfer(address, uint).selector;
    }
}

Error

Member "transfer" not unique after argument-dependent lookup in contract C.

Expected

This behavior is understandable (transfer also has a special meaning). But this behavior is currently undocumented.

[axic]

Should use this.transfer.selector and 0.5.0 mode (pragma experimental "v0.5.0";)

[chriseth]

Closing as this will be solved in 0.5.0.

[k06a]

Any progress?

[fulldecent]

This is resolved. Here is a test case:

pragma solidity ^0.5.1;

contract Selector {
    function transfer(address, uint) external;
    
    function calculateSelector() public pure returns (bytes4) {
        return this.transfer.selector;
    }
}

[k06a]

@fulldecent but how to solve methods overloading?

function transfer(address, uint) external;
function transfer(address, uint, bytes) external;

[fulldecent]

That issue is not resolved and it should be reported separately.

[fulldecent]

Another issue still is calculating the erc165 identifier for an entire interface. For more on that, see #3729