Beyong New and Delete: from auto_ptr to unique_ptr
The article discusses the transition from using std::auto_ptr to std::unique_ptr in C++ programming. It highlights the issues associated with auto_ptr, such as confusing ownership semantics and deprecated status in modern C++. The guide provides a step-by-step refactoring process to improve code clarity and align with contemporary C++ practices.
- ▪The std::auto_ptr has been deprecated since C++11 and removed in C++17, making it incompatible with modern standards.
- ▪Using auto_ptr can lead to dangerous behaviors, such as silent ownership transfers that leave the source pointer null.
- ▪Refactoring to std::unique_ptr clarifies ownership and eliminates the need for verbose access syntax and defensive null checks.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3830024) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Wang - C++ Developer Posted on May 18 Beyong New and Delete: from auto_ptr to unique_ptr #cpp #legacy #refactoring #ptr This guide walks through a legacy pattern built around std::auto_ptr, something still found in many older C++ codebases. The pattern usually involves a helper like cdup that deep‑copies an object and returns it as an auto_ptr, and classes that store these copies and access them through get() checks and raw pointer calls.
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