What is the usage of a class whose destructor is deleted?

Asked Mar 04 '18 at 12:42

Active Mar 04 '18 at 12:49

Viewed 90 times

We can define a class with its destructor deleted:

class A {
public : 
    A() = default;
    ~A() = delete;
};

Then, we cannot define a variable of type A. However, we can use new operator to allocate and construct an object of type A in the heap and we can never delete it. I want to know whether this class has any usage in the real-world?

asked Mar 04 '18 at 12:42

Gamer.Godot

3

You _might_ want to `delete` the destructor of a singleton. – George Mar 04 '18 at 12:46
1

There are some cases or "intentional memory leaks" for singletons, where doing any cleanup is more trouble than it's worth; application-wide parameters or logging come to mind. A deleted destructor may be a part of such pattern. – Matteo Italia Mar 04 '18 at 12:47
1

The second duplicate has a slightly different focus, but many of its answers do touch on the reasons for deleting the destructor. – Sergey Kalinichenko Mar 04 '18 at 12:50
That second dupe is the right one imho. – Ron Mar 04 '18 at 12:51
@dasblinkenlight: I'm not sure, AFAICT all the answers just say "don't do it", not any reason why you would (be tempted to) do it. – Matteo Italia Mar 04 '18 at 12:55
@dasblinkenlight,Thanks for your help! – Gamer.Godot Mar 04 '18 at 13:50

What is the usage of a class whose destructor is deleted?

0 Answers0