linearEqn.H

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2017 OpenFOAM Foundation
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-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

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    the Free Software Foundation, either version 3 of the License, or
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    You should have received a copy of the GNU General Public License
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Class
    Foam::linearEqn

Description
    Linear equation of the form a*x + b = 0

SourceFiles
    linearEqnI.H

\*---------------------------------------------------------------------------*/

#ifndef linearEqn_H
#define linearEqn_H

#include "Roots.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

namespace Foam
{

/*---------------------------------------------------------------------------*\
                         Class linearEqn Declaration
\*---------------------------------------------------------------------------*/

class linearEqn
:
    public VectorSpace<linearEqn, scalar, 2>
{
public:

    //- Component labeling enumeration
    enum components { A, B };


    // Constructors

        //- Construct null
        inline linearEqn();

        //- Construct initialized to zero
        inline linearEqn(const Foam::zero);

        //- Construct from components
        inline linearEqn(const scalar a, const scalar b);


    // Member Functions

        // Access

            inline scalar a() const;
            inline scalar b() const;

            inline scalar& a();
            inline scalar& b();

        //- Evaluate at x
        inline scalar value(const scalar x) const;

        //- Evaluate the derivative at x
        inline scalar derivative(const scalar x) const;

        //- Estimate the error of evaluation at x
        inline scalar error(const scalar x) const;

        //- Get the roots
        inline Roots<1> roots() const;
};


// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

} // End namespace Foam

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#include "linearEqnI.H"

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

#endif

// ************************************************************************* //