C++17 STL Cookbook

How to do it...

In this section, we will define a type that cannot be allocated with new directly and, also, cannot be released again using delete. As this prevents it from being used with smart pointers directly, we perform the necessary little adaptions to instances of unique_ptr and smart_ptr:

1. As always, we first include the necessary headers and declare that we use the std namespace by default:

      #include <iostream>      #include <memory>      #include <string>            using namespace std;

2. Next, we declare a class that has its constructor and destructor declared private. This way, we simulate the problem that we have to access specific functions that create and destroy instances of it:

      class Foo      {          string name;                Foo(string n)              : name{n} { cout << "CTOR ...