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Replace testers with standard metafunctions.

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This commit is contained in:
Georgy Guminov
2025-01-25 12:13:05 +03:00
parent bf4cce6114
commit 741a627b73
3 changed files with 4 additions and 46 deletions
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21
include/boost/iterator/detail/any_conversion_eater.hpp
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@@ -1,21 +0,0 @@
// Copyright David Abrahams 2003. Use, modification and distribution is
// subject to the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef ANY_CONVERSION_EATER_DWA20031117_HPP
# define ANY_CONVERSION_EATER_DWA20031117_HPP
namespace boost {
namespace iterators {
namespace detail {
// This type can be used in traits to "eat" up the one user-defined
// implicit conversion allowed.
struct any_conversion_eater
{
template <class T>
any_conversion_eater(T const&);
};
}}} // namespace boost::iterators::detail
#endif // ANY_CONVERSION_EATER_DWA20031117_HPP

7
include/boost/iterator/is_readable_iterator.hpp
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@@ -6,8 +6,6 @@
#include <boost/mpl/aux_/lambda_support.hpp> #include <boost/mpl/aux_/lambda_support.hpp>
#include <boost/iterator/detail/any_conversion_eater.hpp>
#include <iterator> #include <iterator>
#include <type_traits> #include <type_traits>
@@ -22,9 +20,6 @@ namespace detail
template <class Value> template <class Value>
struct is_readable_iterator_impl struct is_readable_iterator_impl
{ {
static char tester(typename std::add_lvalue_reference<Value>::type, int);
static char (& tester(any_conversion_eater, ...) )[2];
template <class It> template <class It>
struct rebind : std::is_convertible< struct rebind : std::is_convertible<
decltype(*std::declval<It&>()) decltype(*std::declval<It&>())
@@ -33,8 +28,6 @@ namespace detail
{}; {};
}; };
#undef BOOST_READABLE_PRESERVER
// //
// void specializations to handle std input and output iterators // void specializations to handle std input and output iterators
// //

20
include/boost/pointee.hpp
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@@ -35,24 +35,10 @@ namespace detail
{ {
typedef typename std::iterator_traits<Iterator>::value_type value_type; typedef typename std::iterator_traits<Iterator>::value_type value_type;
struct impl
{
template <class T>
static char test(T const&);
static char (& test(value_type&) )[2];
static Iterator& x;
};
BOOST_STATIC_CONSTANT(bool, is_constant = sizeof(impl::test(*impl::x)) == 1);
typedef typename std::conditional< typedef typename std::conditional<
# if BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551)) std::is_const<
::boost::detail::iterator_pointee<Iterator>::is_constant typename std::remove_reference<decltype(*std::declval<Iterator&>())>::type
# else >::value
is_constant
# endif
, typename std::add_const<value_type>::type , typename std::add_const<value_type>::type
, value_type , value_type
>::type type; >::type type;