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// ************************************************************************************************
//
// BornAgain: simulate and fit reflection and scattering
//
//! @file Base/Type/Span.h
//! @brief Defines class Span.
//!
//! @homepage http://www.bornagainproject.org
//! @license GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************************************
#ifndef BORNAGAIN_BASE_TYPE_SPAN_H
#define BORNAGAIN_BASE_TYPE_SPAN_H
#include <utility>
//! An interval. Limits are of type double, and may be infinite.
//! Used for the z-coordinate, especially when slicing form factors.
class Span {
public:
// default c'tor needed by Swig:
Span()
: Span(0, 0)
{
}
Span(double low, double hig);
Span operator+(double increment) const;
double low() const { return m_low; }
double hig() const { return m_hig; }
bool contains(double z) const { return m_low <= z && z <= m_hig; }
std::pair<double, double> pair() const { return {m_low, m_hig}; }
//! Returns the union of two Span (the minimal interval that contains both input intervals).
static Span unite(const Span& left, const Span& right);
private:
// members cannot be made const lest we loose the assignement operator:
double m_low;
double m_hig;
};
#endif // BORNAGAIN_BASE_TYPE_SPAN_H
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