std containers and memory

[Dylan]

If I reserve some memory for a std container, let's say

std::vector<int> myInts;
myInts.reserve(100);

and then allocate another std:vector to it, like so:

std::vector<int> myOtherInts(30, 10);

myInts = myOtherInts;

Is myInts using the reserved memory or allocating a new block?

thanks

 

[Gianni Mariani]

If I reserve some memory for a std container, let's say

std::vector<int> myInts;
myInts.reserve(100);

and then allocate another std:vector to it, like so:

std::vector<int> myOtherInts(30, 10);

myInts = myOtherInts;

Is myInts using the reserved memory or allocating a new block?

That's probably implementation specific. I don't believe the standard
mandates any particular behaviour.