{"id":7876,"date":"2024-03-14T07:12:16","date_gmt":"2024-03-14T07:12:16","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-is-the-unique_ptr-used-in-c\/"},"modified":"2025-08-02T21:52:55","modified_gmt":"2025-08-02T21:52:55","slug":"how-is-the-unique_ptr-used-in-c","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-is-the-unique_ptr-used-in-c\/","title":{"rendered":"C++ unique_ptr Usage Guide"},"content":{"rendered":"

unique_ptr is a smart pointer class used to manage ownership of dynamically allocated objects. Unlike traditional raw pointers, unique_ptr automatically releases the object it manages, preventing memory leaks.<\/p>\n

The usage of unique_ptr is as follows:<\/p>\n

    \n
  1. Create a unique_ptr object: You can use the std::make_unique function to create a unique_ptr object and point it to a dynamically allocated object.<\/li>\n<\/ol>\n
    std::unique_ptr<int<\/span>> ptr = std::make_unique<\/span><int<\/span>>(10<\/span>);\r\n<\/code><\/pre>\n
      \n
    1. Access the object pointed to by the unique_ptr: You can access the object pointed to by the unique_ptr using either the arrow operator or the * operator.<\/li>\n<\/ol>\n
      std::cout << *ptr << std::endl;\r\n<\/code><\/pre>\n
        \n
      1. Transferring ownership: unique_ptr does not allow copying or assigning operations, but you can use the std::move function to transfer its ownership to another unique_ptr object.<\/li>\n<\/ol>\n
        std::unique_ptr<int<\/span>> ptr2 = std::move<\/span>(ptr);\r\n<\/code><\/pre>\n
          \n
        1. Manually releasing objects: unique_ptr automatically releases the object it manages at the end of its lifetime, but it can also be manually released.<\/li>\n<\/ol>\n
          ptr2.reset<\/span>();\r\n<\/code><\/pre>\n
            \n
          1. Customizing deleters using lambda expressions: You can use lambda expressions to customize deleters in order to perform specific operations when releasing objects.<\/li>\n<\/ol>\n
            std::unique_ptr<int<\/span>, std::function<void<\/span>(int<\/span>*)>> ptr3<\/span>(new<\/span> int<\/span>(20<\/span>), [](int<\/span>* p){ std::cout << \"Deleting: \"<\/span> << *p << std::endl; delete<\/span> p; });\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
            unique_ptr is a smart pointer class used to manage ownership of dynamically allocated objects. Unlike traditional raw pointers, unique_ptr automatically releases the object it manages, preventing memory leaks. The usage of unique_ptr is as follows: Create a unique_ptr object: You can use the std::make_unique function to create a unique_ptr object and point it to a […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[4763,274,328,327,10268],"class_list":["post-7876","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c-tutorials","tag-c","tag-memory-management","tag-smart-pointers","tag-unique_ptr"],"yoast_head":"\nC++ unique_ptr Usage Guide - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn C++ unique_ptr usage: prevent memory leaks with automatic memory management. 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