BornAgain

Current implementation is

bool AttLimits::isInRange(double value) const
{
    if(hasLowerLimit() && value < m_lower_limit) return false;
    if(hasUpperLimit() && value >= m_upper_limit) return false;
    return true;
}

Why this asymmetric handling of lower and upper limit? What would be a better choice? Do we possibly need a extra bits to tell whether lower and upper limits are allowed values?

Long-term idea: if a limit is excluded from a range, then upon approaching this limit, a GUI slider or a fit algorithm could automatically cross-over to logarithmic handling of that variable.