mirror of https://github.com/CGAL/cgal
82 lines
2.0 KiB
C++
82 lines
2.0 KiB
C++
// Copyright (c) 2014 GeometryFactory (France). All rights reserved.
|
|
//
|
|
// This file is part of CGAL (www.cgal.org)
|
|
//
|
|
// $URL$
|
|
// $Id$
|
|
// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
|
|
//
|
|
//
|
|
// Author(s) : Andreas Fabri
|
|
|
|
#ifndef CGAL_CONTAINER_HELPER_H
|
|
#define CGAL_CONTAINER_HELPER_H
|
|
|
|
#include <CGAL/array.h>
|
|
#include <CGAL/Has_member.h>
|
|
|
|
#include <CGAL/assertions.h>
|
|
#include <boost/mpl/logical.hpp>
|
|
|
|
#include <array>
|
|
#include <cstddef>
|
|
#include <type_traits>
|
|
|
|
namespace CGAL {
|
|
namespace internal {
|
|
|
|
CGAL_GENERATE_MEMBER_DETECTOR(size);
|
|
CGAL_GENERATE_MEMBER_DETECTOR(resize);
|
|
|
|
// Typical container
|
|
template <class Container>
|
|
void resize(Container& c,
|
|
const std::size_t size,
|
|
std::enable_if_t<has_resize<Container>::value>* = nullptr)
|
|
{
|
|
c.resize(size);
|
|
}
|
|
|
|
template <class T, std::size_t s>
|
|
void resize(const std::array<T, s>& CGAL_assertion_code(array),
|
|
const std::size_t CGAL_assertion_code(size))
|
|
{
|
|
CGAL_assertion(array.size() == size);
|
|
}
|
|
|
|
// A class with neither resize() nor size(), can't enforce size (it better be correct!)
|
|
template <class Container>
|
|
void resize(const Container&,
|
|
const std::size_t,
|
|
std::enable_if_t<
|
|
!(has_resize<Container>::value ||
|
|
has_size<Container>::value)>* = nullptr)
|
|
{
|
|
}
|
|
|
|
// Plenty of times we ask for a model of RandomAccessContainer and use reserve, but some models
|
|
// of the concept do not have a reserve (e.g. deque)
|
|
CGAL_GENERATE_MEMBER_DETECTOR(reserve);
|
|
|
|
// Container with 'reserve'
|
|
template <class Container>
|
|
void reserve(Container& c,
|
|
const std::size_t size,
|
|
std::enable_if_t<has_reserve<Container>::value>* = nullptr)
|
|
{
|
|
c.reserve(size);
|
|
}
|
|
|
|
// Container with no 'reserve'
|
|
template <class Container>
|
|
void reserve(const Container&,
|
|
const std::size_t,
|
|
std::enable_if_t<!has_reserve<Container>::value>* = nullptr)
|
|
{
|
|
}
|
|
|
|
} // namespace internal
|
|
} // namespace CGAL
|
|
|
|
#endif // CGAL_CONTAINER_HELPER_H
|