error C2280: 'std::mutex::mutex(const std::mutex &)' : attempting to reference a deleted function
清泛原创
std::mutex是noncopyable的结构,因此不存在拷贝构造函数,所以这里错误提示引用已经删除的函数。
错误示例代码如下:
解决方法:
将包含std::mutex的类的拷贝构造函数和赋值操作符重载函数,自定义或者标记为delete.
例如:
class Account {
public:
Account(int id_, double ba = 0.0) :id(id_), balance(ba){}
void withdraw(double amount){
balance -= amount;
}
void deposit(double amount){
balance += amount;
}
void printInfo() const {
std::cout << "Account id: " << id << " balance: " << balance << std::endl;
}
Account(const Account& other) = delete;
Account& operator=(const Account& other) = delete;
friend void transfer(Account& from, Account& to, double amount);
private:
double balance;
int id;
std::mutex m;
};
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