simple multiset question

From: John Harrison (john_andronicus_at_hotmail.com)
Date: 08/04/04 

Date: Wed, 04 Aug 2004 07:57:18 +0100

If you insert equal values into a multiset is it specified what order they
will have in the multiset. For instance, what should be the output of this
program, is it defined?

#include <set>
#include <iostream>

int main()
{
        std::multiset<int> m;
        m.insert(1);
        std::multiset<int>::iterator i = m.insert(1);
        if (i == m.begin())
                std::cout << "before\n";
        else
                std::cout << "after\n";
}

FWIW I tested this on two compilers and got "after" both times but I can't
see this issue addressed in the standard anywhere.

john