Re: Static vector

From:

"Bo Persson" <bop@gmb.dk>

Newsgroups:

comp.lang.c++.moderated

Date:

Thu, 30 Sep 2010 14:19:42 CST

Message-ID:

<8gk1c7Fla4U1@mid.individual.net>

MC wrote:

I have a question about static objects.

#include <iostream>
#include <vector>
using namespace std;

void f(){
   static vector<int> v;
   v.push_back(1);
   cout << v.size() << endl;
}

int main(){
   for(int i = 0; i < 1000; i++)
   {
       f();
   }
}

where actually does the compiler stores the vector<int> v?
And after every internal resize does the memory taken by static
vector grows.
Or does the compiler only stores the pointer to vector<int> v.

It is stored in some suitable place. :-)

The standard doesn't say how and where objects are stored. That's up
to each implementation to use the systems resources as well as it can.

In this case one guess is that the vector is stored in the same place
it would be if it had been declared outside the function. The
initialization is just delayed until the first call of the function
(but I don't think even that is required).

Bo Persson

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