wise_enum::size compile error #29

I'm trying to use wise_enum::size like this:

class MyClass final {
public:
    WISE_ENUM_MEMBER(Parameter, First, Second)

    array<Foo, wise_enum::size<Parameter>> values;
};

Unfortunately, I'm getting a compiler error on this line saying: "Constexpr variable 'range' must be initialized by a constant expression" and "Undefined function 'wise_enum_detail_array' cannot be used in a constant expression".

wise_enum_detail_array seems to be defined through the WISE_ENUM_IMPL_ADAPT_3 macro, but I couldn't figure out what exactly is going wrong there..

Any help would be much appreciated! 😊 I'm using Xcode Version 10.1 (10B61) with C++14 standard, with wise_enum at the latest master commit.