If you put the function after the class definition, you must specify the template aspect again as in: template Stack: : Stack() You don't need to do that if you define the function inside the class (but that constitutes a compiler hint to inline the function which you may or may not care about). c++ template class virtual destructor How to call destructor of type in template? Ask Question 2. For example, we have a function like that: c templates constructor destructor templatefunction. share improve this question. edited Nov 3 '12 at 18: 23. Virtual member call in a constructor. 1990.
The base most class of a hierarchy in C must have a virtual destructor; Now for the Why. Take the typical animal hierarchy. Virtual destructors go through virtual dispatch just as any other method call. Take the following example. Animal pAnimal GetAnimal(); delete pAnimal; Assume that Animal is an abstract class. c++ template class virtual destructor
The destructor is not virtual (that is, the base class destructor is not virtual) All direct base classes have trivial destructors All nonstatic data members of class type (or array of class type) have trivial destructors A trivial destructor is a destructor that performs no action. Nov 18, 2008 I'm trying to create a pure virtual class describing an interface. Normally, when I do this I make the destructor pure virtual so that, even if there are no members in the class In C, whats a virtual destructor and when is it needed? As you may know, in C a destructor is generally used to deallocate memory and do some other cleanup for a class object and its class members whenever an object is destroyed. Destructors are distinguished by c++ template class virtual destructor Using a class in this way to represent the distinction between interface and implementation is of course not the only way. For example, we can use a set of declarations of freestanding functions in a namespace, an abstract base class, or a template function with concepts to represent an interface. 6 A destructor can be declared virtual (10. 3) or pure virtual (10. 4); if any objects of that class or any derived class are created in the program, the destructor shall be defined. A class with a pure virtual destructor is an abstract class. Note well: 10. 4 Abstract classes C Virtual Destructors: How to Avoid Memory Leaks. How to avoid memory leaks with virtual destructors when using inheritance in C. By QuantStart Team. and the destructor is not set to virtual, then the base class destructor will be called instead of the derived class destructor. This can lead to a memory leak. C destructor is a special member function that is executed automatically when an object is destroyed that has been created by the constructor. C destructors are used to deallocate the memory that has been allocated for the object by the constructor. Destructor in c programming