Will this memory be freed properly ?

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answers:

+2 Q:

Will this memory be freed properly ?

I have a pair pointer let us suppose std::pair< A*, B* >* pointerpair. I allocated it memory and after using the pair i call delete pointerpair.

Will it also call delete A and delete B and will be freeing the memory completely ?

if i only call delete A and delete B but no delete pointerpair then is it a memory leak ?

+5 A:

no.............

rwong 2010-09-28 06:32:37

In STL and Boost, there is a family of classes called smart pointers, which can automatically delete the objects whose pointers are stored in them. However, outside those smart pointer classes, any raw pointers stored in STL / Boost containers are simply treated as pointers. For example, you can define a set of raw pointers to strings. This set will be sorted using the pointer values, not the lexicographical order of the strings (unless you supply your comparison functor).

rwong 2010-09-28 06:39:04

+2 A:

No. It won't do it automatically. You have to delete it explicitly.

Chubsdad 2010-09-28 06:33:44