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/*-----------------------------------------------------------------------------
| Copyright (c) 2013-2017, Nucleic Development Team.
|
| Distributed under the terms of the Modified BSD License.
|
| The full license is in the file COPYING.txt, distributed with this software.
|----------------------------------------------------------------------------*/
#pragma once
#include <utility>
#include "variable.h"
namespace kiwi
{
class Term
{
public:
Term( const Variable& variable, double coefficient = 1.0 ) :
m_variable( variable ), m_coefficient( coefficient ) {}
// to facilitate efficient map -> vector copies
Term( const std::pair<const Variable, double>& pair ) :
m_variable( pair.first ), m_coefficient( pair.second ) {}
~Term() {}
const Variable& variable() const
{
return m_variable;
}
double coefficient() const
{
return m_coefficient;
}
double value() const
{
return m_coefficient * m_variable.value();
}
private:
Variable m_variable;
double m_coefficient;
};
} // namespace kiwi
|
