12-3 委托模板构造函数

#include <vector>
#include <list>
#include <deque>

class X
{
    template <class T>
    X(T first, T last) : l_(first, last) {}		//代理构造函数
    
    std::list<int> l_;

public:
    X(std::vector<short> &v) : X(v.begin(), v.end()) {}		//vector的委托
    X(std::deque<int> &q) : X(q.begin(), q.end()) {}		//deque的委托
};

int main()
{
    std::vector<short> v{1, 2, 3, 4, 5};
    std::deque<int> q{1, 2, 3, 4, 5};
    X x1(v);
    X x2(q);
    return 0;
}