If we can autogenerate the obtain_from_generic.h from class_list.cpp, everything is fine

obtain_from_generic.h

/*
 * THIS IS A GENERATED FILE! DO NOT CHANGE THIS FILE!
-e  */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 2013 Heiko Strathmann
 */

#ifndef OBTAIN_FROM_GENERIC_H
#define OBTAIN_FROM_GENERIC_H

#include <shogun/kernel/GaussianARDKernel.h>
#include <shogun/features/DenseFeatures.h>

namespace shogun
{
	CGaussianARDKernel* obtain_GaussianARDKernel(CSGObject* generic)
	{
		if (!generic)
			return NULL;

		CGaussianARDKernel* casted = dynamic_cast<CGaussianARDKernel*>(generic);

		REQUIRE(generic, "Object \"%s\" could not be casted to "
				"GaussianARDKernel\n", generic->get_name());

		SG_REF(casted);
		return casted;
	}

	CDenseFeatures<float64_t>* obtain_DenseFeatures_FLOAT64(CSGObject* generic)
	{
		if (!generic)
			return NULL;

		CDenseFeatures<float64_t>* casted = dynamic_cast<CDenseFeatures<float64_t>*>(generic);

		REQUIRE(generic, "Object \"%s\" could not be casted to "
				"CDenseFeatures<float64_t>\n", generic->get_name());

		SG_REF(casted);
		return casted;
	}

}

#endif // OBTAIN_FROM_GENERIC_H

test script

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * Written (W) 2013 Heiko Strathmann
 */

#include <shogun/base/init.h>
#include <shogun/kernel/GaussianARDKernel.h>
#include <shogun/base/obtain_from_generic.h>

using namespace shogun;

void test_obtain_GaussianARDKernel()
{
	CSGObject* generic=new CGaussianARDKernel();
	SG_REF(generic);
	CGaussianARDKernel* obtained=obtain_GaussianARDKernel(generic);
	SG_SPRINT("%s\n", obtained->get_name());
	SG_UNREF(obtained);
	SG_UNREF(generic);
}

void test_obtain_DenseFeatures_FLOAT64()
{
	CSGObject* generic=new CDenseFeatures<float64_t>();
	SG_REF(generic);
	CDenseFeatures<float64_t>* obtained=obtain_DenseFeatures_FLOAT64(generic);
	SG_SPRINT("%s\n", obtained->get_name());
	SG_UNREF(obtained);
	SG_UNREF(generic);
}

int main(int argc, char **argv)
{
	init_shogun_with_defaults();

	sg_io->set_loglevel(MSG_DEBUG);

	test_obtain_GaussianARDKernel();
	test_obtain_DenseFeatures_FLOAT64();

	exit_shogun();

	return 0;
}