如何将可变参数模板参数分成两半?就像是:
template <int d> struct a {
std::array <int, d> p, q;
template <typename ... T> a (T ... t) : p ({half of t...}), q ({other half of t...}) {}
};
Run Code Online (Sandbox Code Playgroud) 我想创建一个数组:
template < typename T, typename ... A > struct a {
T x [1 + sizeof... (A)];
a () = default;
a (T && t, A && ... y) : x { t, y... } {}
};
int main () {
a < int, int > p { 1, 1 }; // ok
a < a < int, int >, a < int, int > > q { { 1, 1 }, { 3, 3 } }; // error: …Run Code Online (Sandbox Code Playgroud)