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// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
#ifndef INCLUDED_GRAS_DETAIL_FACTORY_HPP
#define INCLUDED_GRAS_DETAIL_FACTORY_HPP
#include <PMC/Containers.hpp> //PMCList
namespace gras
{
/***********************************************************************
* Factory entry base class
**********************************************************************/
struct GRAS_API FactoryRegistryEntry
{
FactoryRegistryEntry(void);
virtual ~FactoryRegistryEntry(void);
virtual Element *make(const PMCC &args) = 0;
void arg_check(const PMCList &args, const size_t nargs);
};
#for $NARGS in range($MAX_ARGS)
/***********************************************************************
* Templated registration - $NARGS args
**********************************************************************/
template <typename ReturnType, $expand('typename A%d', $NARGS)>
struct FactoryRegistryEntryImpl$(NARGS) : FactoryRegistryEntry
{
typedef ReturnType(*Fcn)($expand('const A%d &', $NARGS));
FactoryRegistryEntryImpl$(NARGS)(Fcn fcn):_fcn(fcn){}
Element *make(const PMCC &args)
{
const PMCList &a = args.as<PMCList>();
this->arg_check(a, $NARGS);
return _fcn($expand('a[%d].safe_as<A%d>()', $NARGS));
}
Fcn _fcn;
};
template <typename ReturnType, $expand('typename A%d', $NARGS)>
void Factory::register_make(const std::string &name, ReturnType(*fcn)($expand('const A%d &', $NARGS)))
{
void *r = new FactoryRegistryEntryImpl$(NARGS)<ReturnType, $expand('A%d', $NARGS)>(fcn);
Factory::_register_make(name, r);
}
#end for
/***********************************************************************
* Templated make implementations
**********************************************************************/
#for $NARGS in range($MAX_ARGS)
template <$expand('typename A%d', $NARGS)>
Element *Factory::make(const std::string &name, $expand('const A%d &a%d', $NARGS))
{
PMCList args($NARGS);
#for $i in range($NARGS):
args[$i] = PMC_M(a$i);
#end for
return Factory::_handle_make(name, PMC_M(args));
}
#end for
}
#endif /*INCLUDED_GRAS_DETAIL_FACTORY_HPP*/
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