/usr/include/camp/classvisitor.hpp is in libcamp0.7-dev 0.7.1.1-1.
This file is owned by root:root, with mode 0o644.
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**
** Copyright (C) 2009-2010 TECHNOGERMA Systems France and/or its subsidiary(-ies).
** Contact: Technogerma Systems France Information (contact@technogerma.fr)
**
** This file is part of the CAMP library.
**
** CAMP is free software: you can redistribute it and/or modify
** it under the terms of the GNU Lesser General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** CAMP is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU Lesser General Public License for more details.
**
** You should have received a copy of the GNU Lesser General Public License
** along with CAMP. If not, see <http://www.gnu.org/licenses/>.
**
****************************************************************************/
#ifndef CAMP_CLASSVISITOR_HPP
#define CAMP_CLASSVISITOR_HPP
#include <camp/config.hpp>
namespace camp
{
class Property;
class SimpleProperty;
class ArrayProperty;
class EnumProperty;
class UserProperty;
class Function;
/**
* \brief Base class for writing custom Class visitors
*
* A ClassVisitor, when applied to a Class, will be notified for each member property and function of
* the target class. To receive this notification for a specific type T of property or function,
* you have to override the \c visit(T) function.
*
* The benefit of such visitation is that you directly get the actual type of the
* property or function, and can handle it safely without having to use dangerous downcasts.
*
* Another benefit of this method is that you can easily filter the properties and functions
* according to their C++ type: if you don't want to handle a specific type of property or function,
* just don't override the corresponding \c visit function.
*
* Here an example of a visitor which prints the contents of a class:
* \code
* class MyClassVisitor : public camp::ClassVisitor
* {
* void visit(const camp::SimpleProperty& property)
* {
* std::cout << "Simple property: " << property.name() << std::endl;
* }
*
* void visit(const camp::ArrayProperty& property)
* {
* std::cout << "Array property: " << property.name() << " - "
* << "dynamic:" << property.dynamic() << std::endl;
* }
*
* void visit(const camp::EnumProperty& property)
* {
* std::cout << "Enum property: " << property.name() << " - "
* << "owner enum:" << property.getEnum().name() << std::endl;
* }
*
* void visit(const camp::UserProperty& property)
* {
* std::cout << "User property: " << property.name() << " - "
* << "owner class:" << property.getClass().name() << std::endl;
* }
*
* void visit(const camp::Function& function)
* {
* std::cout << "Function: " << function.name() << " - "
* << "number of arguments:" << function.argCount() << std::endl;
* }
* };
*
* const camp::Class& metaclass = camp::classByName("MyClass");
* MyClassVisitor visitor;
* metaclass.visit(visitor);
* \endcode
*/
class CAMP_API ClassVisitor
{
public:
/**
* \brief Destructor
*/
virtual ~ClassVisitor();
/**
* \brief Visit any kind of property
*
* This function is a generic callback which can be used
* to receive all property types which are not handled with
* their derived type.
*
* \param property Property which is being visited
*/
virtual void visit(const Property& property);
/**
* \brief Visit a simple property
*
* \param property Property which is being visited
*/
virtual void visit(const SimpleProperty& property);
/**
* \brief Visit an array property
*
* \param property Property which is being visited
*/
virtual void visit(const ArrayProperty& property);
/**
* \brief Visit an enum property
*
* \param property Property which is being visited
*/
virtual void visit(const EnumProperty& property);
/**
* \brief Visit a user property
*
* \param property Property which is being visited
*/
virtual void visit(const UserProperty& property);
/**
* \brief Visit a function
*
* \param function Function which is being visited
*/
virtual void visit(const Function& function);
protected:
/**
* \brief Default constructor
*/
ClassVisitor();
};
} // namespace camp
#endif // CAMP_VALUEVISITOR_HPP
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