mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-11-25 00:43:44 +00:00
199 lines
7 KiB
C++
199 lines
7 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2017 Bolero MURAKAMI
|
|
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_BEGIN_HPP
|
|
#define SPROUT_CONTAINER_DETAIL_RANGE_BEGIN_HPP
|
|
|
|
#include <iterator>
|
|
#include <utility>
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/type_traits/integral_constant.hpp>
|
|
#include <sprout/type_traits/identity.hpp>
|
|
#include <sprout/type_traits/is_within_namespace_sprout.hpp>
|
|
#include <sprout/container/traits_fwd.hpp>
|
|
#include <sprout/container/container_traits.hpp>
|
|
#include <sprout/container/range_functions_fwd.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 begin(...);
|
|
sprout::not_found_via_adl range_begin(...);
|
|
} // namespace sprout_adl
|
|
|
|
namespace sprout_container_range_detail {
|
|
using sprout_adl::begin;
|
|
|
|
template<typename T>
|
|
struct has_adl_begin_test {
|
|
public:
|
|
template<
|
|
typename U = T,
|
|
typename R = typename sprout::identity<decltype(begin(std::declval<U>()))>::type
|
|
>
|
|
static sprout::is_found_via_adl<R> test(int);
|
|
static sprout::false_type test(...);
|
|
};
|
|
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::iterator
|
|
range_adl_begin(Container& cont) {
|
|
return begin(cont);
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::iterator
|
|
range_adl_begin(Container const& cont) {
|
|
return begin(cont);
|
|
}
|
|
} // namespace sprout_container_range_detail
|
|
|
|
namespace sprout {
|
|
namespace detail {
|
|
#if defined(_MSC_VER) && (_MSC_VER > 1900)
|
|
template<typename T, typename Base_ = typename sprout::identity<decltype(sprout_container_range_detail::has_adl_begin_test<T>::test(0))>::type>
|
|
struct has_adl_begin
|
|
: public Base_
|
|
{};
|
|
#else
|
|
template<typename T>
|
|
struct has_adl_begin
|
|
: public sprout::identity<decltype(sprout_container_range_detail::has_adl_begin_test<T>::test(0))>::type
|
|
{};
|
|
#endif
|
|
template<typename T, bool = sprout::is_within_namespace_sprout<T>::value>
|
|
struct has_adl_begin_without_sprout
|
|
: public sprout::false_type
|
|
{};
|
|
template<typename T>
|
|
struct has_adl_begin_without_sprout<T, false>
|
|
: public sprout::detail::has_adl_begin<T>
|
|
{};
|
|
|
|
template<typename T>
|
|
struct has_mem_begin_test {
|
|
public:
|
|
template<
|
|
typename U = T,
|
|
typename = typename sprout::identity<decltype(std::declval<U>().begin())>::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_begin_test<T>::test(0))>::type>
|
|
struct has_mem_begin
|
|
: public Base_
|
|
{};
|
|
#else
|
|
template<typename T>
|
|
struct has_mem_begin
|
|
: public sprout::identity<decltype(sprout::detail::has_mem_begin_test<T>::test(0))>::type
|
|
{};
|
|
#endif
|
|
|
|
template<typename T>
|
|
struct is_substitutable_const_begin
|
|
: 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_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_begin<Container>::value,
|
|
typename sprout::container_traits<Container>::iterator
|
|
>::type
|
|
range_begin_impl(Container& cont) {
|
|
typedef typename sprout::container_traits<Container>::iterator type;
|
|
return sprout::const_iterator_cast<type>(sprout::begin(sprout::as_const(cont)));
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename std::enable_if<
|
|
!sprout::detail::is_substitutable_const_begin<Container>::value
|
|
&& sprout::detail::has_mem_begin<Container>::value
|
|
,
|
|
typename sprout::container_traits<Container>::iterator
|
|
>::type
|
|
range_begin_impl(Container& cont) {
|
|
return cont.begin();
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename std::enable_if<
|
|
!sprout::detail::is_substitutable_const_begin<Container>::value
|
|
&& !sprout::detail::has_mem_begin<Container>::value
|
|
&& sprout::detail::has_adl_begin_without_sprout<Container&>::value
|
|
,
|
|
typename sprout::container_traits<Container>::iterator
|
|
>::type
|
|
range_begin_impl(Container& cont) {
|
|
return sprout_container_range_detail::range_adl_begin(cont);
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename std::enable_if<
|
|
!sprout::detail::is_substitutable_const_begin<Container>::value
|
|
&& !sprout::detail::has_mem_begin<Container>::value
|
|
&& !sprout::detail::has_adl_begin_without_sprout<Container&>::value
|
|
,
|
|
typename sprout::container_traits<Container>::iterator
|
|
>::type
|
|
range_begin_impl(Container& cont) {
|
|
return std::begin(cont);
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename std::enable_if<
|
|
sprout::detail::has_mem_begin<Container const>::value,
|
|
typename sprout::container_traits<Container const>::iterator
|
|
>::type
|
|
range_begin_impl(Container const& cont) {
|
|
return cont.begin();
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename std::enable_if<
|
|
!sprout::detail::has_mem_begin<Container const>::value
|
|
&& sprout::detail::has_adl_begin_without_sprout<Container const&>::value
|
|
,
|
|
typename sprout::container_traits<Container const>::iterator
|
|
>::type
|
|
range_begin_impl(Container const& cont) {
|
|
return sprout_container_range_detail::range_adl_begin(cont);
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename std::enable_if<
|
|
!sprout::detail::has_mem_begin<Container const>::value
|
|
&& !sprout::detail::has_adl_begin_without_sprout<Container const&>::value
|
|
,
|
|
typename sprout::container_traits<Container const>::iterator
|
|
>::type
|
|
range_begin_impl(Container const& cont) {
|
|
return std::begin(cont);
|
|
}
|
|
} // namespace detail
|
|
} // namespace sprout
|
|
|
|
namespace sprout_container_range_detail {
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container>::iterator
|
|
range_begin(Container& cont) {
|
|
return sprout::detail::range_begin_impl(cont);
|
|
}
|
|
template<typename Container>
|
|
inline SPROUT_CONSTEXPR typename sprout::container_traits<Container const>::iterator
|
|
range_begin(Container const& cont) {
|
|
return sprout::detail::range_begin_impl(cont);
|
|
}
|
|
} // namespace sprout_container_range_detail
|
|
|
|
#endif // #ifndef SPROUT_CONTAINER_DETAIL_RANGE_BEGIN_HPP
|