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clear unique ptr cpp

Jonathan SIX answered on November 10, 2022 Popularity 6/10 Helpfulness 1/10

answer clear unique ptr cpp

clear unique ptr cpp

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#include <iostream>
#include <memory>
 
struct Foo { // object to manage
    Foo() { std::cout << "Foo...\n"; }
    ~Foo() { std::cout << "~Foo...\n"; }
};
 
struct D { // deleter
    void operator() (Foo* p) {
        std::cout << "Calling delete for Foo object... \n";
        delete p;
    }
};
 
int main()
{
    std::cout << "Creating new Foo...\n";
    std::unique_ptr<Foo, D> up(new Foo(), D());  // up owns the Foo pointer (deleter D)
 
    std::cout << "Replace owned Foo with a new Foo...\n";
    up.reset(new Foo());  // calls deleter for the old one
 
    std::cout << "Release and delete the owned Foo...\n";
    up.reset(nullptr);      
}

Popularity 6/10 Helpfulness 1/10 Language cpp

Source: en.cppreference.com

Tags: c++ unique-ptr

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