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src
OpenFOAM
primitives
nil
nil.H
Go to the documentation of this file.
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/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Class
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Foam::nil
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Description
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A zero-sized class without any storage. Used, for example, in HashSet.
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Note
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A zero-sized class actually does still require at least 1 byte storage.
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\*---------------------------------------------------------------------------*/
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#ifndef nil_H
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#define nil_H
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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namespace
Foam
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{
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// Forward declaration of classes
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class
Istream;
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class
Ostream;
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// Forward declaration of friend functions and operators
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class
nil;
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Istream&
operator>>
(Istream&, nil&);
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Ostream&
operator<<
(Ostream&,
const
nil&);
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/*---------------------------------------------------------------------------*\
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Class nil Declaration
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\*---------------------------------------------------------------------------*/
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class
nil
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{
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public
:
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// Constructors
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//- Construct null
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nil
()
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{}
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//- Construct from Istream
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nil
(
Istream
&)
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{}
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// IOstream Operators
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friend
Istream
&
operator>>
(
Istream
& is,
nil
&)
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{
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return
is;
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}
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friend
Ostream
&
operator<<
(
Ostream
& os,
const
nil
&)
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{
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return
os;
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}
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};
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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}
// End namespace Foam
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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#endif
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// ************************ vim: set sw=4 sts=4 et: ************************ //