可変長引数テンプレート習作

variadic_templates_test.cc

#include <iostream>

template <typename T>
T inject_plus(T v)
{ return v; }

template <typename T, typename ... Rest>
T inject_plus(T v, Rest ... rest)
{
        return v + inject_plus(rest...);
}

int main()
{
        std::string hello("Hello");
        std::string world(" World");

        std::cout << inject_plus(1, 10, 100, 1000) << std::endl;
        std::cout << inject_plus(3.0, 0.14, 0.00159) << std::endl;
        std::cout << inject_plus(hello, world) << std::endl;
}