Swift how to extend my own class in separate files

Question

I want to do the following:

MyClass.swift:

public class MyClass {
    ...
}

MyClass+Extension.swift:

extension MyClass {
   ...
}

If I have both in the same file it works fine, if they are in separate files I get the following error:

"Use of undeclared type 'MyClass'"

I already checked the target membership of both files. They are part of the same target.

Answer 1

The following will enable you to access your additional functions in MyClass+Extension.swift from anywhere that your original MyClass is accessible, which included outside its module since it had a public access level:

public extension MyClass {
   ...
}