C++通用print

Ref: https://zhuanlan.zhihu.com/p/338785886

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void println() {}
void println(auto x, auto... args)
{
    std::cout << std::boolalpha;
    std::cout << x << " ";
    println(args...);
    std::cout << std::endl;
}

// constexpr c++17 auto c++20
void print(auto firstArg, auto... args)
{
    std::cout << firstArg << ' ';
    if constexpr (sizeof...(args) > 0) 
        print(args...);
    else
        std::cout << std::endl;
}

C++可变参数模板的展开方式

https://blog.csdn.net/albertsh/article/details/123978539