variable.h

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#ifndef REPRESENTATION_FORMAL_BASIC_ENTITY_VARIABLE_H
#define REPRESENTATION_FORMAL_BASIC_ENTITY_VARIABLE_H

#include <capd/capdlib.h>
#include <functional>

namespace irafhy
{
    class Variable
    {
    private:
        long int index_ = -2;

    public:
        Variable() = default;
        explicit Variable(long index);
        ~Variable() = default;
        [[nodiscard]] std::function<
            capd::autodiff::Node(capd::autodiff::Node, capd::autodiff::Node[], int, capd::autodiff::Node[], int)>
            arithmetic() const;
        capd::interval value(const capd::interval&              t,
                             const std::vector<capd::interval>& in,
                             const std::vector<capd::interval>& params);
        friend std::ostream& operator<<(std::ostream& out, const Variable& rhs);
    };
} // namespace irafhy
#endif //REPRESENTATION_FORMAL_BASIC_ENTITY_VARIABLE_H