stavalfi

C++ lvalue, rvalue and between By Stav Alfi

Topics

1. Introduction
2. Object definitions
3. Common misunderstanding
4. Expressions vs Types
5. Move consturctor and opertator
6. Source

kjelloh

struct foo {
    foo& operator=(const foo& other) = delete; // foo is not copy-assignable
};

void bar() {
    foo f1;
    foo& r1 = f1; // Ok. r1 is reference to f1.
    foo& r2 = r1; // ok. r2 is refernce to r1 which is semanticly the value f1.
    r2 = r1; // Error. Semantics implies value assign (although both sides are references) and foo instance f1 is not assignable. 
    

exallium

#include <iostream>
#include <boost/thread.hpp>

using namespace std;
using boost::thread;
using boost::mutex;

mutex a;

const int THREAD_COUNT = 10;