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c++ std containers calling destructors

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Started by whiterook6 March 31, 2010 09:31 AM

3 comments, last by ChaosEngine 14 years ago

whiterook6

124

Author

March 31, 2010 09:31 AM

I was reading the list reference on cplusplus.com and I found something: it says when I call clear or erase, for each element it removes it calls its destructor. so if I have


Object *o=new Object();
list<Object *> objects;
objects.insert(o);
objects.clear();

will o be deleted? or does it simply erase the pointer in the list? Because I don't want the list deleting my objects if it's not creating them too.

SiCrane

11,840

March 31, 2010 09:34 AM

Standard library containers won't call delete on pointers they hold.

Brother Bob

10,350

March 31, 2010 09:36 AM

The destructor of the object stored in the vector will be called. Your vector stores pointers, and pointers don't have empty an destructor (or no destructor at all, if you want). It doesn't do anything with the object being pointed to, because the vector cannot know what has to be done.