Hi there, Do you have any problem copying class ? ISomething& alias

Question

Hi there, Do you have any problem copying class ? ISomething& alias

= getSomething()

CSomething *m_pSomthingImpl;
ISomething& getSomething()
{
return *m_pSomethingImpl;
}

if CSomethingImpl has some member variable,
the copy is not successfull leave _vptr with 0.
I though reference & is just an alias.
There is no need to copy data.
CMIIW.

getSomething().dismiss() <- it works.
but alias.dismiss() <- it doesnt.

0

18.01.2021

9 ответов

22 просмотра

John Автор вопроса

Pavel
Works for me without issues, can you provide the c...

Because address of new object, luckyly the same. Therefore, Reference should not be used. *Alias is not set to another object yet. Sorry, just replied.

0

26.03.2021

Pavel

John
Because address of new object, luckyly the same. T...

Do you have a code example where it breaks? To understand what you mean

0

26.03.2021

John Автор вопроса

Pavel
Do you have a code example where it breaks? To und...

ISomething& temporary = getSomething(case1); temporary = getSomething(case2); temporary.dismiss() There should be error on case2 temporary.dismiss(). But it is ok if just : getSomething(case1).dismiss(); getSomething(case2).dismiss();

0

26.03.2021

Ghasem Ramezani

John
ISomething& temporary = getSomething(case1); tempo...

We couldn't compile this, give us a complete program including the problem.

0

26.03.2021

John Автор вопроса

Ghasem Ramezani
We couldn't compile this, give us a complete progr...

Thanks Sir. Been solved.

0

26.03.2021