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Removed MPL usage from pointee and indirect_reference.

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This commit is contained in:
Andrey Semashev 2025-01-26 17:57:47 +03:00
parent d6297a553b
commit bcf94f9e5d
2 changed files with 47 additions and 49 deletions
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39
include/boost/indirect_reference.hpp
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@ -1,5 +1,5 @@
#ifndef INDIRECT_REFERENCE_DWA200415_HPP
# define INDIRECT_REFERENCE_DWA200415_HPP
#define INDIRECT_REFERENCE_DWA200415_HPP
//
// Copyright David Abrahams 2004. Use, modification and distribution is
@ -11,29 +11,30 @@
// http://www.boost.org/libs/iterator/doc/pointee.html
//
# include <boost/detail/is_incrementable.hpp>
# include <boost/iterator/iterator_traits.hpp>
# include <boost/mpl/eval_if.hpp>
# include <boost/pointee.hpp>
#include <boost/detail/is_incrementable.hpp>
#include <boost/iterator/iterator_traits.hpp>
#include <boost/pointee.hpp>
#include <type_traits>
namespace boost {
namespace detail {
namespace detail
template< typename P >
struct smart_ptr_reference
{
template <class P>
struct smart_ptr_reference
{
typedef typename boost::pointee<P>::type& type;
};
}
using type = typename boost::pointee<P>::type&;
};
template <class P>
struct indirect_reference
: mpl::eval_if<
detail::is_incrementable<P>
, iterator_reference<P>
, detail::smart_ptr_reference<P>
>
} // namespace detail
template< typename P >
struct indirect_reference :
std::conditional<
detail::is_incrementable<P>::value,
iterator_reference<P>,
detail::smart_ptr_reference<P>
>::type
{
};

57
include/boost/pointee.hpp
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@ -1,5 +1,5 @@
#ifndef POINTEE_DWA200415_HPP
# define POINTEE_DWA200415_HPP
#define POINTEE_DWA200415_HPP
//
// Copyright David Abrahams 2004. Use, modification and distribution is
@ -13,45 +13,42 @@
// http://www.boost.org/libs/iterator/doc/pointee.html
//
# include <boost/detail/is_incrementable.hpp>
# include <boost/iterator/iterator_traits.hpp>
# include <boost/mpl/eval_if.hpp>
#include <boost/detail/is_incrementable.hpp>
#include <boost/iterator/iterator_traits.hpp>
#include <iterator>
#include <type_traits>
namespace boost {
namespace detail {
namespace detail
template< typename P >
struct smart_ptr_pointee
{
template <class P>
struct smart_ptr_pointee
{
typedef typename P::element_type type;
};
using type = typename P::element_type;
};
template <class Iterator>
struct iterator_pointee
{
typedef typename std::iterator_traits<Iterator>::value_type value_type;
template< typename Iterator, typename = typename std::remove_reference<decltype(*std::declval<Iterator&>())>::type >
struct iterator_pointee
{
using type = typename std::iterator_traits<Iterator>::value_type;
};
typedef typename std::conditional<
std::is_const<
typename std::remove_reference<decltype(*std::declval<Iterator&>())>::type
>::value
, typename std::add_const<value_type>::type
, value_type
>::type type;
};
}
template< typename Iterator, typename Reference >
struct iterator_pointee< Iterator, const Reference >
{
using type = typename std::add_const<typename std::iterator_traits<Iterator>::value_type>::type;
};
template <class P>
struct pointee
: mpl::eval_if<
detail::is_incrementable<P>
, detail::iterator_pointee<P>
, detail::smart_ptr_pointee<P>
>
} // namespace detail
template< typename P >
struct pointee :
public std::conditional<
detail::is_incrementable<P>::value,
detail::iterator_pointee<P>,
detail::smart_ptr_pointee<P>
>::type
{
};