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Ошибка в MSVC17 в constexpr bool contains(type_pack<Ts...>) #2

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XRay3D opened this issue Apr 15, 2020 · 0 comments

XRay3D commented Apr 15, 2020 •

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main.cpp:180: ошибка: C2466: невозможно выделить память для массива постоянного нулевого размера
bool bs[]{ std::is_same<T, Ts>::value... };

Моё решение.

namespace good {

    // type-based
    template <class T, class... Ts>
    constexpr bool contains(type_pack<Ts...>)
    {
        bool res = false;
        if constexpr (sizeof...(Ts) > 0)
            bool bs[]{ std::is_same<T, Ts>::value... };
            for (bool b : bs) {
                res |= b;
            }
        }            
        return res;
    }
...

} // namespace good

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