FieldReuseFunctions.H

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    Copyright (C) 2019 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.
 
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    under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
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    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
    You should have received a copy of the GNU General Public License
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#ifndef FieldReuseFunctions_H
#define FieldReuseFunctions_H
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
template<class TypeR, class Type1>
struct reuseTmp
{
    static tmp<Field<TypeR>> New(const tmp<Field<Type1>>& tf1)
    {
        return tmp<Field<TypeR>>::New(tf1().size());
    }
};
 
 
template<class TypeR>
struct reuseTmp<TypeR, TypeR>
{
    static tmp<Field<TypeR>> New
    (
        const tmp<Field<TypeR>>& tf1,
        const bool initCopy = false
    )
    {
        if (tf1.isTmp())
        {
            return tf1;
        }
 
        auto rtf = tmp<Field<TypeR>>::New(tf1().size());
 
        if (initCopy)
        {
            rtf.ref() = tf1();
        }
 
        return rtf;
    }
};
 
 
//- This global function forwards to reuseTmp::New
template<class TypeR> tmp<Field<TypeR>> New
(
    const tmp<Field<TypeR>>& tf1,
    const bool initCopy = false
)
{
    return reuseTmp<TypeR, TypeR>::New(tf1, initCopy);
}
 
 
template<class TypeR, class Type1, class Type12, class Type2>
struct reuseTmpTmp
{
    static tmp<Field<TypeR>> New
    (
        const tmp<Field<Type1>>& tf1,
        const tmp<Field<Type2>>& tf2
    )
    {
        return tmp<Field<TypeR>>::New(tf1().size());
    }
};
 
 
template<class TypeR, class Type1, class Type12>
struct reuseTmpTmp<TypeR, Type1, Type12, TypeR>
{
    static tmp<Field<TypeR>> New
    (
        const tmp<Field<Type1>>& tf1,
        const tmp<Field<TypeR>>& tf2
    )
    {
        if (tf2.isTmp())
        {
            return tf2;
        }
 
        return tmp<Field<TypeR>>::New(tf1().size());
    }
};
 
 
template<class TypeR, class Type2>
struct reuseTmpTmp<TypeR, TypeR, TypeR, Type2>
{
    static tmp<Field<TypeR>> New
    (
        const tmp<Field<TypeR>>& tf1,
        const tmp<Field<Type2>>& tf2
    )
    {
        if (tf1.isTmp())
        {
            return tf1;
        }
 
        return tmp<Field<TypeR>>::New(tf1().size());
    }
};
 
 
template<class TypeR>
struct reuseTmpTmp<TypeR, TypeR, TypeR, TypeR>
{
    static tmp<Field<TypeR>> New
    (
        const tmp<Field<TypeR>>& tf1,
        const tmp<Field<TypeR>>& tf2
    )
    {
        if (tf1.isTmp())
        {
            return tf1;
        }
        else if (tf2.isTmp())
        {
            return tf2;
        }
 
        return tmp<Field<TypeR>>::New(tf1().size());
    }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //