bool operator==(const Something& mS)
{
if (isFloat != mS.isFloat)
{
return false;
}
else if (isFloat)
{
return mS.k == k;
}
else
{
return mS.n == n;
}
}
Clear and debuggable with the minimum number of checks. You want to have a constructor and/or set methods to ensure isFloat is correct at all times.