How to pass unique pointer to function in c++ ?
Source code:
/*
Program: Unique pointer pass to function
Author: Alpha Master
Date: 23 September 2021
*/
//Header File
#include<iostream>
#include<memory>
#include<string>
std::unique_ptr<std::string> addSuffix(std::unique_ptr<std::string> upt)
{
std::string temp = (*upt.get()) + " master";
std::cout<<temp<<std::endl;
//reset
upt.reset(new std::string(temp));
return upt;
}
void addSuffix01(std::unique_ptr<std::string>& upt)
{
std::string temp = (*upt.get()) + " digestcpp.com";
std::cout<<temp<<std::endl;
//reset
upt.reset(new std::string(temp));
return;
}
int main()
{
std::cout<<"Unique pointer"<<std::endl;
//Creat new object
std::unique_ptr<std::string> up { new std::string {"alpha"}};
//pass this unique object to function via value
std::unique_ptr<std::string> out = addSuffix(std::move(up));
std::cout<<"Output:"<<*out.get();
std::cout<<std::endl;
//pass this unique object to function via actual object
addSuffix01(out);
std::cout<<"Output:"<<*out.get();
std::cout<<std::endl;
return 0;
}
Output:
Unique pointer alpha master Output:alpha master alpha master digestcpp.com Output:alpha master digestcpp.com