根据模板参数所使用的参数的数量部分专门化模板的语法是什么?

Consider the following code:

考虑下面的代码:

template<typename>
struct One {};

template<typename, typename>
struct Two {};

template<template<typename...> class TTP, typename...>
struct SS;

#ifdef    TEST_TTP
    template<template<typename> class OneParam,
             typename... Ts>
    struct SS<OneParam, Ts...> {};

    template<template<typename, typename> class TwoParam,
             typename... Ts>
    struct SS<TwoParam, Ts...> {};
#else  // TEST_TTP
    template<template<typename> class OneParam,
             typename TParam>
    struct SS<OneParam, TParam> {};

    template<template<typename, typename> class TwoParam,
             typename TParam1,
             typename TParam2>
    struct SS<TwoParam, TParam1, TParam2> {};
#endif // TEST_TTP

int main() {
    SS<One, int>       ssoi;
    SS<Two, int, int> sstii;
}
templ