public IntSet Union(IntSet r, bool cloneWhenOneIsEmpty = false)
{
// Union of inverted sets is accomplished via intersection code: ~a | ~b => ~(a & b)
IntSet l = this;
if (l.IsInverted || r.IsInverted)
{
if (!l.IsInverted)
{
l = l.EquivalentInverted();
}
if (!r.IsInverted)
{
r = r.EquivalentInverted();
}
return(New(l.IsInverted ? r : l, true, IntersectCore(l, r)));
}
else
{
if (cloneWhenOneIsEmpty)
{
if (l._ranges.Count == 0)
{
return(r.Clone());
}
if (r._ranges.Count == 0)
{
return(l.Clone());
}
}
return(New(this, false, UnionCore(l, r)));
}
}
