traits.h

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/*
 * LSST Data Management System
 * Copyright 2008, 2009, 2010 LSST Corporation.
 *
 * This product includes software developed by the
 * LSST Project (http://www.lsst.org/).
 *
 * 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.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the LSST License Statement and
 * the GNU General Public License along with this program.  If not,
 * see <http://www.lsstcorp.org/LegalNotices/>.
 */
 
#if !defined(LSST_AFW_MATH_KERNEL_TRAITS_H)
#define LSST_AFW_MATH_KERNEL_TRAITS_H 1
 
#include "boost/mpl/bool.hpp"
/*
 * Traits to describe kernels, allowing for compile-time optimisation
 */
namespace lsst {
namespace afw {
namespace math {
class AnalyticKernel;

template <typename KernelT>
struct is_analyticKernel {
    BOOST_STATIC_CONSTANT(bool, value = false);
};
struct is_analyticKernel {…};
 
template <typename KernelT>
struct is_analyticKernel<KernelT *> : public is_analyticKernel<KernelT> {};
 
template <typename KernelT>
struct is_analyticKernel<std::shared_ptr<KernelT> > : public is_analyticKernel<KernelT> {};
 
template <>
struct is_analyticKernel<AnalyticKernel> {
    BOOST_STATIC_CONSTANT(bool, value = true);
};
struct is_analyticKernel<AnalyticKernel> {…};

struct generic_kernel_tag {
    generic_kernel_tag() {}
};  
struct generic_kernel_tag {…};
struct deltafunction_kernel_tag : public generic_kernel_tag {
    deltafunction_kernel_tag() {}
};  
struct deltafunction_kernel_tag : public generic_kernel_tag {…};

template <typename KernelT>
struct kernel_traits {
    using kernel_fill_factor = typename KernelT::kernel_fill_factor;  
};
struct kernel_traits {…};
 
extern generic_kernel_tag generic_kernel_tag_;
extern deltafunction_kernel_tag deltafunction_kernel_tag_;
}  // namespace math
}  // namespace afw
}  // namespace lsst
 
#endif