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// Copyright (c) 2008 INRIA Sophia-Antipolis (France).
// 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; version 2.1 of the License.
// See the file LICENSE.LGPL distributed with CGAL.
//
// 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: svn+ssh://scm.gforge.inria.fr/svn/cgal/branches/CGAL-3.6-branch/STL_Extension/include/CGAL/array.h $
// $Id: array.h 51051 2009-08-04 15:03:23Z spion $
//
// Author(s) : Sylvain Pion
#ifndef CGAL_ARRAY_H
#define CGAL_ARRAY_H
#include <CGAL/config.h>
#ifndef CGAL_CFG_NO_CPP0X_ARRAY
# include <array>
#elif !defined CGAL_CFG_NO_TR1_ARRAY
# include <tr1/array>
#else
# include <boost/array.hpp>
#endif
CGAL_BEGIN_NAMESPACE
namespace cpp0x {
#ifndef CGAL_CFG_NO_CPP0X_ARRAY
using std::array;
#elif !defined CGAL_CFG_NO_TR1_ARRAY
using std::tr1::array;
#else
using boost::array;
#endif
} // cpp0x
// This using is just for short-term backward-compat, people should take the
// habit to use CGAL::cpp0x::array.
using cpp0x::array;
// The make_array() function simply constructs an std::array.
// It is needed for cases where a std::array is used as a class data
// member and you want to initialize it in the member initializers list.
// It is also optimized: no spurious copies of the objects are made,
// provided the compiler does the NRVO. So this is better than
// default construction followed by assignment.
// I proposed it for Boost.Array, but it has not been integrated so far.
// See the thread starting at
// http://lists.boost.org/Archives/boost/2006/08/109003.php
//
// C++0x has it under discussion here :
// http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html#851
// Hopefully C++0x will fix this properly with initializer_lists.
// So, it's temporary, therefore I do not document it and keep it internal.
// NOTE : The above is actually untrue ! It is possible to do :
// struct S2 {
// typedef boost::array<M,2> Ar;
// Ar m;
// S2 (const M&a) : m ((Ar) { { a, a } }) {}
// };
// without spurious copies... Except VC++ does not eat it :-(
// It's also untrue that this is not documented... It is !
#ifndef CGAL_CFG_NO_CPP0X_VARIADIC_TEMPLATES
template< typename T, typename... Args >
inline
cpp0x::array< T, 1 + sizeof...(Args) >
make_array(const T & t, const Args & ... args)
{
cpp0x::array< T, 1 + sizeof...(Args) > a = { { t, args... } };
return a;
}
#else // CGAL_CFG_NO_CPP0X_VARIADIC_TEMPLATES
template < typename T > inline
cpp0x::array<T, 1>
make_array(const T& b1)
{
cpp0x::array<T, 1> a = { { b1 } };
return a;
}
template < typename T > inline
cpp0x::array<T, 2>
make_array(const T& b1, const T& b2)
{
cpp0x::array<T, 2> a = { { b1, b2 } };
return a;
}
template < typename T > inline
cpp0x::array<T, 3>
make_array(const T& b1, const T& b2, const T& b3)
{
cpp0x::array<T, 3> a = { { b1, b2, b3 } };
return a;
}
template < typename T > inline
cpp0x::array<T, 4>
make_array(const T& b1, const T& b2, const T& b3, const T& b4)
{
cpp0x::array<T, 4> a = { { b1, b2, b3, b4 } };
return a;
}
template < typename T > inline
cpp0x::array<T, 5>
make_array(const T& b1, const T& b2, const T& b3, const T& b4, const T& b5)
{
cpp0x::array<T, 5> a = { { b1, b2, b3, b4, b5 } };
return a;
}
template < typename T > inline
cpp0x::array<T, 6>
make_array(const T& b1, const T& b2, const T& b3, const T& b4, const T& b5,
const T& b6)
{
cpp0x::array<T, 6> a = { { b1, b2, b3, b4, b5, b6 } };
return a;
}
#endif // CGAL_CFG_NO_CPP0X_VARIADIC_TEMPLATES
CGAL_END_NAMESPACE
#endif // CGAL_ARRAY_H
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