Squashed 'kiwi/' content from commit 268028e

git-subtree-dir: kiwi
git-subtree-split: 268028ee4a694dcd89e4b1e683bf2f9ac48c08d9

kiwi/term.h

@@ -0,0 +1,59 @@
+/*-----------------------------------------------------------------------------
+| Copyright (c) 2013-2017, Nucleic Development Team.
+|
+| Distributed under the terms of the Modified BSD License.
+|
+| The full license is in the file LICENSE, distributed with this software.
+|----------------------------------------------------------------------------*/
+#pragma once
+#include <utility>
+#include "variable.h"
+
+
+namespace kiwi
+{
+
+class Term
+{
+
+public:
+
+	Term( Variable variable, double coefficient = 1.0 ) :
+		m_variable( std::move(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 Term&) = default;
+
+	Term(Term&&) noexcept = default;
+
+	~Term() = default;
+
+	const Variable& variable() const
+	{
+		return m_variable;
+	}
+
+	double coefficient() const
+	{
+		return m_coefficient;
+	}
+
+	double value() const
+	{
+		return m_coefficient * m_variable.value();
+	}
+
+	Term& operator=(const Term&) = default;
+
+	Term& operator=(Term&&) noexcept = default;
+
+private:
+
+	Variable m_variable;
+	double m_coefficient;
+};
+
+} // namespace kiwi