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// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
#ifndef INCLUDED_GRAS_CALLABLE_HPP
#define INCLUDED_GRAS_CALLABLE_HPP
#include <gras/gras.hpp>
#include <PMC/PMC.hpp>
#include <string>
#include <vector>
namespace gras
{
/*!
* The callable interface allows subclasses to export public methods,
* but without actually exporting traditional library symbols.
*
* Callable handles the template magic so you don't have to:
* - registering subclass methods is simple and easy on the user.
* - users call registered methods with natural code aesthetics.
*
* Register a method (in the constructor of MyClass):
* this->register_call("set_foo", &MyClass::set_foo);
*
* Call a method on a instance of MyClass:
* my_class->call("set_foo", new_foo_val);
*/
struct GRAS_API Callable
{
//! Default constructor
Callable(void);
//! Destructor (virtual for subclasses)
virtual ~Callable(void);
/*******************************************************************
* Register API - don't look here, template magic, not helpful
******************************************************************/
template <typename ClassType, typename ReturnType>
void register_call(const std::string &key, ReturnType(ClassType::*fcn)(void));
template <typename ClassType, typename ReturnType, typename Arg0>
void register_call(const std::string &key, ReturnType(ClassType::*fcn)(const Arg0 &));
template <typename ClassType, typename ReturnType, typename Arg0, typename Arg1>
void register_call(const std::string &key, ReturnType(ClassType::*fcn)(const Arg0 &, const Arg1 &));
template <typename ClassType>
void register_call(const std::string &key, void(ClassType::*fcn)(void));
template <typename ClassType, typename Arg0>
void register_call(const std::string &key, void(ClassType::*fcn)(const Arg0 &));
template <typename ClassType, typename Arg0, typename Arg1>
void register_call(const std::string &key, void(ClassType::*fcn)(const Arg0 &, const Arg1 &));
/*******************************************************************
* Call API - don't look here, template magic, not helpful
******************************************************************/
template <typename ReturnType>
ReturnType call(const std::string &key);
template <typename ReturnType, typename Arg0>
ReturnType call(const std::string &key, const Arg0 &);
template <typename ReturnType, typename Arg0, typename Arg1>
ReturnType call(const std::string &key, const Arg0 &, const Arg1 &);
void call(const std::string &key);
template <typename Arg0>
void call(const std::string &key, const Arg0 &);
template <typename Arg0, typename Arg1>
void call(const std::string &key, const Arg0 &, const Arg1 &);
/*******************************************************************
* Private registration hooks
******************************************************************/
void _register_call(const std::string &, void *);
virtual PMCC _handle_call(const std::string &, const std::vector<PMCC> &);
std::map<std::string, void *> _call_registry;
};
} //namespace gras
#include <gras/detail/callable.hpp>
#endif /*INCLUDED_GRAS_CALLABLE_HPP*/
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