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// 3.6.perfect.forward.cpp

// modern c++ tutorial

// created by changkun at changkun.de

// https://github.com/changkun/modern-cpp-tutorial

#include <iostream>

#include <utility>

void reference(int& v) {

std::cout << "lvalue reference" << std::endl;

}

void reference(int&& v) {

std::cout << "rvalue reference" << std::endl;

}

template <typename T>

void pass(T&& v) {

std::cout << " normal param passing: ";

reference(v);

std::cout << " std::move param passing: ";

reference(std::move(v));

std::cout << " std::forward param passing: ";

reference(std::forward<T>(v));

std::cout << "static_cast<T&&> param passing: ";

reference(static_cast<T&&>(v));

}

int main() {

std::cout << "rvalue pass:" << std::endl;

pass(1);

std::cout << "lvalue pass:" << std::endl;

int l = 1;

pass(l);

return 0;

}