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Implicit Type Promotion Order for Custom Class

The C++ language has no way to specify an implicit conversion precedence order and I can't see any way to meet all your requirements.

The best solution here is to remove your operator int(). I know you said you don't want that alternative , but calling .get() is only six more characters of typing, once when you first write it. Then not only does it solve your ambiguity but it can prevent obscure bugs due to implicit conversion to int. Those are the kinds of bugs where you stare at the code for two days (pretend you're maintaining your code two years later) and still can't see the bug because you don't realize the implicit conversion has been used.

Categories : C++

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