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.
Related Issues (20)
- 语句有些繁琐,可否简化表达 HOT 1
- 第6章的习题设置不合理 HOT 1
- 网页端渲染存在问题 HOT 1
- 关于普通重载和override的一个区别 HOT 1
- 第二章 尾返回类型推导 “我们已经提过 auto 不能用于函数形参进行类型推导” HOT 2
- Chapter 2 exercise answer bug HOT 2
- 第八章内容 HOT 1
- 网页加载速度 HOT 1
- C++ 中不允许将 `NULL` 定义为 `((void*)0)` HOT 2
- `3.3` 右值引用中的错误描述 HOT 1
- lambda 表达式隐式捕获用“编译器自行推导”这种措辞极度不合适 HOT 24
- 多线程中不该牵扯 `volatile` 关键字,且描述经不起推敲没有逻辑,带有错误暗示
- `std::unique_ptr` 概念描述不够清晰 HOT 3
- RAII 不是一种语法,第七章描述错误 HOT 1
- 描述 `std::mutex` 的用词奇怪,应当更改 HOT 3
- “堆栈回退”我认为您要表达的是:“栈回溯” HOT 1
- 2.3 中的 `typeof` 不是 C++ 中的标准特性 HOT 1
- `constexpr` 一节中,是编译器扩展导致,而非是新编译器优化的问题,解释有误
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from modern-cpp-tutorial.