/usr/include/CGAL/Kernel_traits.h is in libcgal-dev 4.11-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | // Copyright (c) 2001
// Utrecht University (The Netherlands),
// ETH Zurich (Switzerland),
// INRIA Sophia-Antipolis (France),
// Max-Planck-Institute Saarbruecken (Germany),
// and Tel-Aviv University (Israel). All rights reserved.
//
// This file is part of CGAL (www.cgal.org); you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 3 of the License,
// or (at your option) any later version.
//
// Licensees holding a valid commercial license may use this file in
// accordance with the commercial license agreement provided with the software.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
//
// $URL$
// $Id$
//
//
// Author(s) : Sylvain Pion
#ifndef CGAL_KERNEL_TRAITS_H
#define CGAL_KERNEL_TRAITS_H
#include <boost/mpl/has_xxx.hpp>
#include <boost/mpl/if.hpp>
namespace CGAL {
namespace internal_kernel_traits{
BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(Has_nested_R,R,false)
/// In case no specialization of CGAL::Kernel_traits is provided and the type used
/// is not coming from a CGAL Kernel, we provide a dummy Kernel just to break later
/// and only when it is used. This was introduced to avoid issues with a free function
/// return a nested type of the kernel through Kernel_traits. Even if the function
/// was not the one to consider, its return type should be instanciable.
template <class T>
struct Dummy_kernel
{
struct FT{};
};
template <class T, bool is_cgal_kernel = Has_nested_R<T>::value >
struct Kernel_traits{
typedef typename T::R type;
};
template <class T>
struct Kernel_traits<T, false>{
typedef Dummy_kernel<T> type;
};
} // end of namespace internal_kernel_traits
template <class T>
struct Kernel_traits
{
typedef typename internal_kernel_traits::Kernel_traits<T>::type Kernel;
typedef Kernel type;
};
} // end namespace CGAL
#endif // CGAL_KERNEL_TRAITS_H
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