// Native_SmartPointers.cpp : Defines the entry point for the console application.
/*
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U S I N G   S M A R T   P O I N T E R S

Ron Kessler
Created 1/9/2017

Native version

Purpose:

Here we learn about unique_ptr. This is used as a pointer to an object but the 
destructor for the object is called automatically. This way, we never have to use the new or delete
keywords with creating plain pointers. So we get the advantage of creating objects on the heap
but without the hassle of forgetting to release those resources!

Look at the Employee.h file to see the structure of the Employee class.


Run with CTL-F5
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*/

#include "stdafx.h"
#include "Employee.h"
#include <iostream>
#include <memory>			//so we can use std::unique_ptr

using namespace std;

void createEmployee ();		//framework for function

int main()
{

	createEmployee ();
	return 0;
}

void createEmployee ()
	{

	try
		{
			//---now create two new Employees.
			Employee HR{ "Grace" };			//no pointer just an object on the heap

			//---now use a smart pointer to create another Employee on the heap. We would do
			//	this if we needed to access this object in another part of our app or we needed
			// it to remain in memory when a function goes out of scope.
			std::unique_ptr<Employee> smartPtr{ new Employee{ "Charlie" } };

			//---now lets say there is an error and the app needs to cleanup these objects
			throw ( exception{ "Another error by Ron!" } );
		}
	catch (const exception& e)
		{
			cout << "Exception was caught: " << e.what () << "\n\n";
		}

	cout << "Notice how the objects are destroyed in the reverse order they were created! \n\n\n";
	}