Hi there Does deleting the 'instance' on line 24 result in

To answer your question; no Deleting instance results in output being deleted. int number is basically automatically deleted when the function returns, static int x is never deleted, and never created, there's just one x for the entire lifetime of the program

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13.06.2023

Sahand 🏔️ Автор вопроса

Thomas
L21 calls new L11 calls new (called by L22) So 2 c...

Yes, technically I need to delete 'output' if I want to deallocate it. But also I need it to return from my function.. actually I will be happy if it gets deleted by deleting the 'instance' variable, so the memory leaks will be avoided ....

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13.06.2023

Azadi

Why should deleting the object instance delete all data in func?

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13.06.2023

Thomas

Sahand 🏔️
Yes, technically I need to delete 'output' if I wa...

Are you on Linux? I think you should try ltrace

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13.06.2023

Sahand 🏔️ Автор вопроса

Azadi
Why should deleting the object instance delete all...

I thought deleting instance result in deleting on-heap-allocated data too .. that's my guess

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13.06.2023

Thomas

Sahand 🏔️
I thought deleting instance result in deleting on-...

It does, but variables in functions are not on-heap

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13.06.2023

Sahand 🏔️ Автор вопроса

Thomas
Are you on Linux? I think you should try ltrace

That's an online compiler

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13.06.2023

Sahand 🏔️ Автор вопроса

Thomas
It does, but variables in functions are not on-hea...

Yep

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13.06.2023

Sahand 🏔️ Автор вопроса

Thomas
output is the only thing you allocate, so it's the...

What do you mean by "when you reassign instance" ? Like what I did on line 22 here ? https://t.me/thedevs_c/246528

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13.06.2023

Azadi

Sahand 🏔️
I thought deleting instance result in deleting on-...

delete will free the memory allocated by new. So in this case yes. As for the static variable,it remains until your program terminates.

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13.06.2023

Thomas

Sahand 🏔️
What do you mean by "when you reassign instance" ?...

yes

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13.06.2023

Sahand 🏔️ Автор вопроса

Thomas
output is the only thing you allocate, so it's the...

Here you said "that is never deleted" but here https://t.me/thedevs_c/246534 you also said deleting instance results in deleting output... So .. ? I'm a bit confused 😬 Will output be deleted by deleting instance?

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13.06.2023

Thomas

// this is never deleted A *instance = new A; A *output = new A; instance = output; // output is deleted delete instance;

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13.06.2023

Thomas

Thomas
// this is never deleted A *instance = new A; A *...

instance = output; overwrites the original address of instance, and then the original can never be deleted, because you lost the address to it

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13.06.2023

Sahand 🏔️ Автор вопроса

Thomas
instance = output; overwrites the original address...

Oh now I understand A* instance = new A; A* ptr = instance; instance = instance->func(); /* some code */ // GC delete instance; instance = ptr; delete instance; This one also works right ?

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13.06.2023

Thomas

Sahand 🏔️
Oh now I understand A* instance = new A; A* ptr =...

yeah

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13.06.2023

Thomas · Accepted Answer

Thomas

output is the only thing you allocate, so it's the only thing you need to delete from inside func(). BUT this still leaks memory, because the original instance is overwritten when you reassign instance, so that is never deleted

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13.06.2023

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Hi there Does deleting the 'instance' on line 24 result in

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