binary_expression.h

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//    |  /           |
//    ' /   __| _` | __|  _ \   __|
//    . \  |   (   | |   (   |\__ `
//   _|\_\_|  \__,_|\__|\___/ ____/
//                   Multi-Physics
//
//  License:         BSD License
//                   Kratos default license: kratos/license.txt
//
//  Main authors:    Suneth Warnakulasuriya
//
 
#pragma once
 
// System includes
#include <cmath>
#include <string>
#include <vector>
 
// Project includes
#include "expression/expression.h"
 
namespace Kratos {
 
 
namespace BinaryOperations
{
    struct Addition       { static inline constexpr double Evaluate(const double V1, const double V2) { return V1 + V2; } };
    struct Substraction   { static inline constexpr double Evaluate(const double V1, const double V2) { return V1 - V2; } };
    struct Multiplication { static inline constexpr double Evaluate(const double V1, const double V2) { return V1 * V2; } };
    struct Division       { static inline constexpr double Evaluate(const double V1, const double V2) { return V1 / V2; } };
    struct Power          { static inline           double Evaluate(const double V1, const double V2) { return std::pow(V1, V2); } };
}
 
 
template <class TOperationType>
class KRATOS_API(KRATOS_CORE) BinaryExpression : public Expression {
public:
 
    using IndexType = std::size_t;
 
 
    BinaryExpression(
        Expression::ConstPointer pLeft,
        Expression::ConstPointer pRight);
 
 
    static Expression::Pointer Create(
        Expression::ConstPointer pLeft,
        Expression::ConstPointer pRight);
 
    double Evaluate(
        const IndexType EntityIndex,
        const IndexType EntityDataBeginIndex,
        const IndexType ComponentIndex) const override;
 
    const std::vector<IndexType> GetItemShape() const override;
 
    IndexType GetMaxDepth() const override;
 
    std::string Info() const override;
 
protected:
 
    const Expression::ConstPointer mpLeft;
 
    const Expression::ConstPointer mpRight;
 
};
 
} // namespace Kratos