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// Copyright (c) 2022 GeometryFactory Sarl (France).
// All rights reserved.
//
// This file is part of CGAL (www.cgal.org)
//
// $URL: https://github.com/CGAL/cgal/blob/v6.1/Filtered_kernel/include/CGAL/Converting_construction.h $
// $Id: include/CGAL/Converting_construction.h b26b07a1242 $
// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
//
//
// Author(s) : Laurent Rineau
#ifndef CGAL_CONVERTING_CONSTRUCTION_H
#define CGAL_CONVERTING_CONSTRUCTION_H
#include <CGAL/config.h>
#include <CGAL/Cartesian_converter.h>
#include <CGAL/Cartesian/Is_trivial_construction.h>
#include <type_traits>
namespace CGAL {
template <class Source_construction, class Target_construction,
class Converter, class Backward_converter>
struct Converting_construction
{
CGAL_NO_UNIQUE_ADDRESS Source_construction source_construction;
CGAL_NO_UNIQUE_ADDRESS Target_construction construct;
CGAL_NO_UNIQUE_ADDRESS Converter convert;
CGAL_NO_UNIQUE_ADDRESS Backward_converter backward_convert;
template <typename... Args,
std::enable_if_t<CartesianFunctors::Is_trivial_construction<Source_construction, Args...>::value>* = nullptr>
decltype(auto) operator()(Args&&... args) const {
return source_construction(std::forward<Args>(args)...);
}
template <typename... Args,
std::enable_if_t<!CartesianFunctors::Is_trivial_construction<Source_construction, Args...>::value>* = nullptr>
auto operator()(Args&&... args) const {
return backward_convert(construct(convert(args)...));
}
};
template <class Kernel_A, class Kernel_B>
struct Converting_constructions_kernel_adaptor : public Kernel_A
{
using A_to_B = Cartesian_converter<Kernel_A, Kernel_B>;
using B_to_A = Cartesian_converter<Kernel_B, Kernel_A>;
#define CGAL_Kernel_cons(C,Cf) \
using C = Converting_construction<typename Kernel_A::C, \
typename Kernel_B::C, \
A_to_B, \
B_to_A>; \
C Cf() const { return C(); }
#include <CGAL/Kernel/interface_macros.h>
};
} // end namespace CGAL
#endif // CGAL_CONVERTING_CONSTRUCTION_H
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