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/***************************************************************************
* function.h
* This file is part of the KDE project
* copyright (C)2004-2005 by Sebastian Sauer (mail@dipe.org)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This program 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
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
***************************************************************************/
#ifndef KROSS_API_FUNCTION_H
#define KROSS_API_FUNCTION_H
#include "../main/krossconfig.h"
#include "object.h"
#include "list.h"
#include <qstring.h>
namespace Kross { namespace Api {
/**
* The base class for functions. Classes like \a Function0 and
* \a ProxyFunction inheritate this class.
*/
class Function
{
public:
/**
* Each function needs to implement the call-method which will
* be executed if the function itself should be executed.
*/
virtual Object::Ptr call(List::Ptr) = 0;
};
/**
* This class implements the most abstract way to work with functions. It
* implements pointing to functions of the form
* @code
* Kross::Api::Object::Ptr myfunc(Kross::Api::List::Ptr)
* @endcode
* where a low-level \a Object got returned that represents the returnvalue
* of the function-call, and a \a List instance is passed that may contain
* optional \a Object instances as parameters.
*/
template<class INSTANCE>
class Function0 : public Function
{
private:
typedef Object::Ptr(INSTANCE::*Method)(List::Ptr);
INSTANCE* m_instance;
Method m_method;
public:
Function0(INSTANCE* instance, Method method)
: m_instance(instance), m_method(method) {}
Object::Ptr call(List::Ptr args)
{ return (m_instance->*m_method)(args); }
};
/**
* Specialization of the \a Function0 which takes as additional parameter
* a const-value. This const-value will be hidden for the scripting backend
* and is only passed through on function-call.
*
* So, this class could be as example used to point to a function like;
* @code
* Kross::Api::Object::Ptr myfunc(Kross::Api::List::Ptr, int myinteger)
* @endcode
* and then we are able to point to the function with something like
* @code
* this->addFunction("myfunctionname",
* new Kross::Api::Function1< MYCLASS, int >(
* this, // pointer to an instance of MYCLASS
* &MYCLASS::myfunction, // the method which should be wrapped
* 17 // the const-value we like to pass to the function.
* ) );
* @endcode
* The defined integer myinteger which has the value 17 will be passed
* transparently to myfunc. The scripting-backend won't know that there
* exists such an additional integer at all. So, it's hidden and the user
* aka the scripting code won't be able to manipulate that additional
* value.
*/
template<class INSTANCE, typename P1>
class Function1 : public Function
{
private:
typedef Object::Ptr(INSTANCE::*Method)(List::Ptr, P1);
INSTANCE* m_instance;
Method m_method;
P1 m_p1;
public:
Function1(INSTANCE* instance, Method method, P1 p1)
: m_instance(instance), m_method(method), m_p1(p1) {}
Object::Ptr call(List::Ptr args)
{ return (m_instance->*m_method)(args, m_p1); }
};
/**
* Same as \a Function1 but with 2 additional parameters.
*/
template<class INSTANCE, typename P1, typename P2>
class Function2 : public Function
{
private:
typedef Object::Ptr(INSTANCE::*Method)(List::Ptr, P1, P2);
INSTANCE* m_instance;
Method m_method;
P1 m_p1;
P2 m_p2;
public:
Function2(INSTANCE* instance, Method method, P1 p1, P2 p2)
: m_instance(instance), m_method(method), m_p1(p1), m_p2(p2) {}
Object::Ptr call(List::Ptr args)
{ return (m_instance->*m_method)(args, m_p1, m_p2); }
};
}}
#endif
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