Ethereum: Undeclared Identifier `_disableInitializers();`
I understand what’s going on. The error message is pretty clear:
Error (7576): Undeclared identifier
--> src/BoxV1.sol:32:9:
|
32 | _disableInitializers();
The problem is that you are trying to access a function “DisableInitializers” without defining it anywhere in your code. The correct definition of this function must be included in the same file or imported from another module.
Assuming that “DisableInitializers” is a custom function defined elsewhere, here is how you can fix the error:
- Add the required import statement:
pragma solidity ^0.8.0;
import "./BoxV1.sol";
This imports the contract “BoxV1” from another file.
- Define the “DisableInitializers” function:
function _disableInitializers() extern {
// DisableInitializers implementation
}
Note that I used a different naming convention for the function here, but it should match the one defined in the imported contract (BoxV1.sol).
- Update your code to use “DisableInitializers”:
//SPDX-License-Identifier: MI
pragma solidity ^0.8.0;
import "./BoxV1.sol";
function DisableInitializers() extern {
_disableInitializers();
}
This should resolve the error and allow your code to compile successfully.
Example use case:
You can now call DisableInitializers on a BoxV1 instance, like this:
BoxV1 contract {
public BoxV1() function {
// initialize everything here...
}
external DisableInitializers() function {
_disableInitializers();
}
}
With this updated code, you should be able to compile and run your contract without encountering the “Undeclared identifier” error.
