Variadic template with template and non-type parameters

╄→гoц情女王★ 提交于 2020-12-10 06:22:07

问题


Having the code snippet below (under C++17 standard):

template <class ...TParams>
class Wrapper {
public:
    template <template <class, TParams...> class TTemplate, class TValue, TParams ...params>
    class Base {
    public:
        TTemplate<TValue, params...> value;
    };
};
template <class T, bool Param1, int Param2>
class Class {
public:
    T value;
    bool boolean = Param1;
    int integer = Param2;
};
template <class T, bool Param1, int Param2>
class Derived :public Wrapper<bool, int>::Base<Class, T, Param1, Param2> {};
int main() {
    Derived<int,true,0> test;
    return 0;
}

MSVC fails to compile, saying "the template parameter list for class template 'Class' does not match the template parameter list for template parameter 'TTemplate'"
May anyone explain the reason why Class doesn't match TTemplate? Thanks in advance.

来源:https://stackoverflow.com/questions/65006748/variadic-template-with-template-and-non-type-parameters

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