95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/* -*-mode:c++; c-file-style: "gnu";-*- */
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/*
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* $Id: MStreamable.h,v 1.13 2014/04/23 20:55:09 sebdiaz Exp $
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*
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* Copyright (C) 1996 - 2004 Stephen F. Booth <sbooth@gnu.org>
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* 2007 Sebastien DIAZ <sebastien.diaz@gmail.com>
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* Part of the GNU cgicc library, http://www.gnu.org/software/cgicc
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*/
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#ifndef _MSTREAMABLE_H_
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#define _MSTREAMABLE_H_ 1
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#ifdef __GNUG__
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#pragma interface
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#endif
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/*! \file MStreamable.h
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* \brief Abstract base class for all streamable objects.
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*
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* A streamable object is an object that can be written to an \c
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* ostream using the \c << operator.
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*/
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#include <iostream>
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#include "CgiDefs.h"
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namespace cgicc {
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class MStreamable;
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/*!
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* Prototype for overloading streaming operator
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* \param out The ostream to which to write
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* \param obj The MStreamable object to write
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* \return A reference to \c out
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*/
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CGICC_API std::ostream &operator<<(std::ostream &out, const MStreamable &obj);
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// ============================================================
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// Class MStreamable
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// ============================================================
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/*! \class MStreamable MStreamable.h cgicc/MStreamable.h
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* \brief Mix-in streamable interface.
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*
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* Abstract mix-in class which makes classes streamable via
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* the \c << operator.
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* Written in the spirit of a Java interface.
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*/
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class CGICC_API MStreamable {
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friend CGICC_API std::ostream &operator<<(std::ostream &out,
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const MStreamable &obj);
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public:
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/*!
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* \brief Empty constructor
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*
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*/
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inline MStreamable() {}
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/*!
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* \brief Empty destructor
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*
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*/
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inline virtual ~MStreamable() {}
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/*!
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* \brief Write this object to a stream.
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*
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* Subclasses must implement this function.
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* \param out The ostream to which to write.
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*/
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virtual void render(std::ostream &out) const = 0;
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};
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} // namespace cgicc
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#endif /* ! _MSTREAMABLE_H_ */
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