Comments (1)
Input Code 输入代码
#include <iostream>
using namespace std;
void reference(int& v) {
std::cout << " 左值" << std::endl;
}
void reference(int&& v) {
std::cout << " 右值" << std::endl;
}
void pass(int && v) {
std::cout << " 普通传参:";
reference(v); // 始终调用 reference(int&)
}
int main() {
std::cout << " 传递右值:" << std::endl;
pass(1); // 1 是右值, 但输出是左值
std::cout << " 传递左值:" << std::endl;
int l = 1;
pass(l); // l 是左值, 输出左值
return 0;
}
from modern-cpp-tutorial.
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from modern-cpp-tutorial.