Keeping map/vector as data member

Asked Dec 29 '15 at 17:17

Active Dec 29 '15 at 17:17

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Let's say I have class A which has a map data member. I allocated object a (of class A) on the heap. Where the map memory is stored? On the stack? I'm asking since the map memory can be changed and the memory couldn't be allocated when I allocated space for the object of A class

Thanks

asked Dec 29 '15 at 17:17

maor levi

3

The contents of the map are valid as long as the object encapsulating it is valid. That's all there is to it. – Daniel Kamil Kozar Dec 29 '15 at 17:21
Also [see here](https://stackoverflow.com/questions/12826722/c-are-the-members-of-a-heap-allocated-class-automatically-allocated-in-the-hea) – Cory Kramer Dec 29 '15 at 17:21
A map manages its own memory (on the free store). But the object itself resides inside the A that was allocated. – StoryTeller - Unslander Monica Dec 29 '15 at 17:22
@StoryTeller: Not necessarily on the free store. – Lightness Races in Orbit Dec 29 '15 at 17:27
@LightnessRacesinOrbit, using the default allocator? – StoryTeller - Unslander Monica Dec 29 '15 at 17:30
@StoryTeller: With the default allocator yeah more or less. I don't know whether even that's guaranteed tbh, but I'd guess it is. – Lightness Races in Orbit Dec 29 '15 at 17:33

Keeping map/vector as data member

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