Sprout/sprout/container/detail/range_index_of.hpp

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2016-04-17 15:34:15 +00:00
/*=============================================================================
Copyright (c) 2011-2017 Bolero MURAKAMI
2016-04-17 15:34:15 +00:00
https://github.com/bolero-MURAKAMI/Sprout
Distributed under 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 SPROUT_CONTAINER_DETAIL_RANGE_INDEX_OF_HPP
#define SPROUT_CONTAINER_DETAIL_RANGE_INDEX_OF_HPP
#include <utility>
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/type_traits/integral_constant.hpp>
#include <sprout/type_traits/identity.hpp>
#include <sprout/container/traits_fwd.hpp>
#include <sprout/container/container_traits.hpp>
#include <sprout/container/range_functions_fwd.hpp>
#include <sprout/container/detail/range_begin.hpp>
#include <sprout/iterator/operation.hpp>
#include <sprout/iterator/const_iterator_cast.hpp>
#include <sprout/utility/as_const.hpp>
#include <sprout/adl/not_found.hpp>
namespace sprout_adl {
sprout::not_found_via_adl range_index_of(...);
} // namespace sprout_adl
namespace sprout {
namespace detail {
template<typename T>
struct has_mem_index_of_test {
public:
template<
typename U = T,
typename = typename sprout::identity<decltype(std::declval<U>().index_of(std::declval<typename sprout::container_traits<U>::iterator>()))>::type
>
static sprout::true_type test(int);
static sprout::false_type test(...);
};
#if defined(_MSC_VER) && (_MSC_VER > 1900)
template<typename T, typename Base_ = typename sprout::identity<decltype(sprout::detail::has_mem_index_of_test<T>::test(0))>::type>
struct has_mem_index_of
: public Base_
{};
#else
template<typename T>
struct has_mem_index_of
: public sprout::identity<decltype(sprout::detail::has_mem_index_of_test<T>::test(0))>::type
{};
#endif
template<typename T>
struct is_substitutable_const_index_of
: public sprout::bool_constant<
sprout::is_const_iterator_cast_convertible<
typename sprout::container_traits<T const>::iterator,
typename sprout::container_traits<T>::iterator
>::value
&& (
sprout::detail::has_mem_index_of<T const>::value
|| sprout::detail::has_mem_begin<T const>::value
|| sprout::detail::has_adl_begin_without_sprout<T const&>::value
)
>
{};
template<typename Container>
inline SPROUT_CONSTEXPR typename std::enable_if<
sprout::detail::is_substitutable_const_index_of<Container>::value,
typename sprout::container_traits<Container>::size_type
>::type
range_index_of_impl(Container& cont, typename sprout::container_traits<Container>::iterator p) {
typedef typename sprout::container_traits<Container>::iterator type;
return sprout::index_of(sprout::as_const(cont), sprout::const_iterator_cast<type>(p));
}
template<typename Container>
inline SPROUT_CONSTEXPR typename std::enable_if<
!sprout::detail::is_substitutable_const_index_of<Container>::value
&& sprout::detail::has_mem_index_of<Container>::value
,
typename sprout::container_traits<Container>::size_type
>::type
range_index_of_impl(Container& cont, typename sprout::container_traits<Container>::iterator p) {
return cont.index_of(p);
}
template<typename Container>
inline SPROUT_CONSTEXPR typename std::enable_if<
!sprout::detail::is_substitutable_const_index_of<Container>::value
&& !sprout::detail::has_mem_index_of<Container>::value
,
typename sprout::container_traits<Container>::size_type
>::type
range_index_of_impl(Container& cont, typename sprout::container_traits<Container>::iterator p) {
return sprout::distance(sprout::begin(cont), p);
}
template<typename Container>
inline SPROUT_CONSTEXPR typename std::enable_if<
sprout::detail::has_mem_index_of<Container const>::value,
typename sprout::container_traits<Container const>::size_type
>::type
range_index_of_impl(Container const& cont, typename sprout::container_traits<Container const>::iterator p) {
return cont.index_of(p);
}
template<typename Container>
inline SPROUT_CONSTEXPR typename std::enable_if<
!sprout::detail::has_mem_index_of<Container const>::value,
typename sprout::container_traits<Container const>::size_type
>::type
range_index_of_impl(Container const& cont, typename sprout::container_traits<Container const>::iterator p) {
return sprout::distance(sprout::begin(cont), p);
}
} // namespace detail
} // namespace sprout
namespace sprout_container_range_detail {
template<typename Container>
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::size_type
range_index_of(Container& cont, typename sprout::container_traits<Container>::iterator p) {
return sprout::detail::range_index_of_impl(cont, p);
}
template<typename Container>
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::size_type
range_index_of(Container const& cont, typename sprout::container_traits<Container const>::iterator p) {
return sprout::detail::range_index_of_impl(cont, p);
}
} // namespace sprout_container_range_detail
#endif // #ifndef SPROUT_CONTAINER_DETAIL_RANGE_INDEX_OF_HPP