Here are a few question-based titles, keeping in mind the content: * When is it Necessary to Explicitly Call Destructors in C ? * Why Might You Explicitly Call a Destructor in C ? * What are the Sp

Explicitly Calling Destructors in C

While it's generally advised against explicitly calling destructors, there are specific scenarios where it becomes necessary. One such case is exemplified in the C 11 Standard N3485 Section 13.4.5 regarding template arguments.

As showcased in the code snippet, it's permissible to explicitly invoke a destructor on an object of a class template specialization, explicitly specifying the template arguments:

<code class="cpp">template<class T> struct A {
    ~A();
}; 

void f(A<int>* p, A<int>* q) {
    p->A<int>::~A();      // OK: destructor call
    q->A<int>::~A<int>(); // OK: destructor call
}</code>

This explicit call becomes necessary when dealing with objects created using placement new. In such cases, the destructor must be explicitly invoked to properly release the associated memory.

Besides placement delete, there are other limited scenarios where explicit destructor calls are justified:

• Destruction of trivially destructible objects: Objects with trivial destructors (i.e., those that take no actions) can be explicitly destroyed without adverse effects. However, there's no significant benefit to doing so.
• Certain resource management and testing scenarios: In rare instances, explicit destructor calls may be employed for specific resource management purposes or during testing.

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