mirror of https://github.com/CGAL/cgal
91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
// Copyright (c) 2015 GeometryFactory
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//
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// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public License as
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// published by the Free Software Foundation; either version 3 of the License,
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// or (at your option) any later version.
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//
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// Licensees holding a valid commercial license may use this file in
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// accordance with the commercial license agreement provided with the software.
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//
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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//
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// $URL$
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// $Id$
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// SPDX-License-Identifier: LGPL-3.0-or-later
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//
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// Author(s) : Mael Rouxel-Labbé
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#ifndef CGAL_IO_READER_HELPERS_H
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#define CGAL_IO_READER_HELPERS_H
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#include <CGAL/array.h>
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#include <CGAL/assertions.h>
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#include <CGAL/Has_member.h>
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#include <boost/mpl/logical.hpp>
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#include <boost/utility/enable_if.hpp>
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namespace CGAL{
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namespace IO {
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namespace internal {
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CGAL_GENERATE_MEMBER_DETECTOR(size);
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CGAL_GENERATE_MEMBER_DETECTOR(resize);
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// Typical container
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template <class Container>
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void resize(Container& c, std::size_t size,
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typename boost::enable_if_c<has_resize<Container>::value>::type* = nullptr)
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{
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c.resize(size);
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}
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// Container without a resize() function, but with a size() function (e.g. an array)
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template <class Container>
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void resize(Container& CGAL_assertion_code(array), std::size_t CGAL_assertion_code(size),
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typename boost::enable_if<
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boost::mpl::and_<
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boost::mpl::not_<has_resize<Container> >,
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has_size<Container> > >::type* = nullptr)
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{
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CGAL_assertion(array.size() == size);
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}
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// A class with neither resize() nor size(), can't enforce size (it better be correct!)
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template <class Container>
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void resize(Container&, std::size_t,
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typename boost::disable_if<
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boost::mpl::or_<has_resize<Container>,
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has_size<Container> > >::type* = nullptr)
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{
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}
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// Ideally this should be a std::is_constructible(double, double, double) but boost::is_constructible
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// is not safe to use without CXX11
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template <typename Kernel>
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void fill_point(const double x, const double y, const double z, CGAL::Point_3<Kernel>& pt)
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{
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pt = CGAL::Point_3<Kernel>(x, y, z);
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}
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template <typename Point_3>
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void fill_point(const double x, const double y, const double z, Point_3& pt)
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{
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// just in case something weirder than arrays or CGAL points are used as points...
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resize(pt, 3);
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pt[0] = x; pt[1] = y; pt[2] = z;
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}
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} // end namespace internal
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} // end namespace IO
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} // namespace CGAL
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#endif // CGAL_IO_READER_HELPERS_H
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