int
AtomSet::operator< (const AtomSet& atomset2) const
{
if (this->size() < atomset2.size()) // <
{
return true;
}
else if (this->size() > atomset2.size()) // >
{
return false;
}
else // same size, they can still be < or >=
{
// find first mismatch
std::pair<AtomSet::const_iterator, AtomSet::const_iterator> result;
result = std::mismatch(this->begin(), this->end(), atomset2.begin());
// no mismatch: ==, otw. check if the found mismatch is < or >=
return result.first == this->end() ? false : *result.first < *result.second;
}
}
bool
AtomSet::operator== (const AtomSet& atomset2) const
{
return ((this->size() == atomset2.size())
&& std::equal(this->begin(), this->end(), atomset2.begin()));
}
