JIndexRange
JCovering
(
const JIndexRange& r1,
const JIndexRange& r2
)
{
const JBoolean n1 = r1.IsNothing();
const JBoolean n2 = r2.IsNothing();
if (n1 && n2)
{
return JIndexRange();
}
else if (n1)
{
return r2;
}
else if (n2)
{
return r1;
}
else
{
return JIndexRange( JMin(r1.first, r2.first),
JMax((r1.IsEmpty() ? r1.first-1 : r1.last),
(r2.IsEmpty() ? r2.first-1 : r2.last)) );
}
}
