62 lines
2.2 KiB
C++
62 lines
2.2 KiB
C++
// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
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//-----------------------------------------------------------------------------
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// eoPrintable.h
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// (c) GeNeura Team, 1998
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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 2 of the License, or (at your option) any later version.
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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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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Contact: todos@geneura.ugr.es, http://geneura.ugr.es
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*/
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//-----------------------------------------------------------------------------
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#ifndef EOPRINTABLE_H
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#define EOPRINTABLE_H
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//-----------------------------------------------------------------------------
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#include <iostream> // std::istream, std::ostream
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#include <string> // para std::string
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/*
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This functionality was separated from eoObject, since it makes no sense to print
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some objects (for instance, a #eoFactory# or a random number generator.
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*/
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/**
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Base class for objects that can print themselves
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(#printOn#). Besides, this file defines the standard output for all the objects;
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if the objects define printOn there's no need to define "operator<<".
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@ingroup Core
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*/
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class eoPrintable
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{
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public:
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/// Virtual dtor. They are needed in virtual class hierarchies.
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virtual ~eoPrintable() {}
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/**
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* Write object. It's called printOn since it prints the object on a stream.
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* @param _os A std::ostream.
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*/
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virtual void printOn(std::ostream& _os) const = 0;
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};
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//-----------------------------------------------------------------------------
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///Standard output for all objects in the EO hierarchy
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std::ostream & operator << ( std::ostream& _os, const eoPrintable& _o );
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#endif
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