px4_autopilot/matrix/Scalar.hpp

/**
 * @file Scalar.hpp
 *
 * Defines conversion of matrix to scalar.
 *
 * @author James Goppert <james.goppert@gmail.com>
 */

#pragma once

#include "math.hpp"

namespace matrix
{

template<typename Type>
class Scalar
{
public:
    Scalar() = delete;

    Scalar(const Matrix<Type, 1, 1> & other) :
        _value{other(0,0)}
    {
    }

    Scalar(Type other) : _value(other)
    {
    }

    operator const Type &()
    {
        return _value;
    }

    operator Matrix<Type, 1, 1>() const {
        Matrix<Type, 1, 1> m;
        m(0, 0) = _value;
        return m;
    }

    operator Vector<Type, 1>() const {
        Vector<Type, 1> m;
        m(0) = _value;
        return m;
    }

private:
    const Type _value;

};

typedef Scalar<float> Scalarf;

} // namespace matrix

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