C++: Difference between revisions

C++ (view source)

346 bytes added , 7 October 2019

5,322

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 ===Memory===
-==== Garbage Collection ====
+====Smart Pointers===
-[https://www.geeksforgeeks.org/smart-pointers-cpp/ Smart Pointers]<br>
+[https://www.geeksforgeeks.org/auto_ptr-unique_ptr-shared_ptr-weak_ptr-2/ Smart Pointers]<br>
-[https://www.geeksforgeeks.org/auto_ptr-unique_ptr-shared_ptr-weak_ptr-2/ Smart Pointers Types]<br>
+There are 4 types of smart pointers
-Starting from C++14, you should use smart pointers such as [https://en.cppreference.com/w/cpp/memory/shared_ptr <code>shared_ptr</code>] which has automatic garbage collection.<br>
+* <code>auto_ptr</code> which is deprecated
+* <code>unique_ptr</code>
+* <code>shared_ptr</code>
+* <code>weak_ptr</code>
+Use <code>unique_ptr</code> for ownership models.<br>
+Use <code>shared_ptr</code> when multiple objects need to reference the same thing.<br>
+Use <code>weak_ptr</code> to avoid cyclic dependencies which cause issues with reference counting.<br>
+====Garbage Collection====
+Starting from C++14, you should use smart pointers such as [https://en.cppreference.com/w/cpp/memory/shared_ptr <code>shared_ptr</code>] which have automatic garbage collection.<br>
 <br>
 Traditional C++ does not have garbage collection.<br>