mirror of
https://github.com/bolero-MURAKAMI/Sprout
synced 2024-11-12 21:09:01 +00:00
134 lines
4.1 KiB
C++
134 lines
4.1 KiB
C++
/*=============================================================================
|
|
Copyright (c) 2011-2013 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_RANGE_ADAPTOR_INDEXED_HPP
|
|
#define SPROUT_RANGE_ADAPTOR_INDEXED_HPP
|
|
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
#include <sprout/container/traits.hpp>
|
|
#include <sprout/container/functions.hpp>
|
|
#include <sprout/iterator/indexed_iterator.hpp>
|
|
#include <sprout/range/adaptor/detail/adapted_range_default.hpp>
|
|
#include <sprout/type_traits/lvalue_reference.hpp>
|
|
#include <sprout/utility/forward.hpp>
|
|
#include <sprout/utility/lvalue_forward.hpp>
|
|
|
|
namespace sprout {
|
|
namespace adaptors {
|
|
//
|
|
// indexed_range
|
|
//
|
|
template<typename Range>
|
|
class indexed_range
|
|
: public sprout::adaptors::detail::adapted_range_default<
|
|
Range,
|
|
sprout::indexed_iterator<typename sprout::container_traits<Range>::iterator>
|
|
>
|
|
{
|
|
public:
|
|
typedef sprout::adaptors::detail::adapted_range_default<
|
|
Range,
|
|
sprout::indexed_iterator<typename sprout::container_traits<Range>::iterator>
|
|
> base_type;
|
|
typedef typename base_type::range_type range_type;
|
|
typedef typename base_type::iterator iterator;
|
|
typedef typename iterator::index_type index_type;
|
|
public:
|
|
indexed_range() = default;
|
|
indexed_range(indexed_range const&) = default;
|
|
explicit SPROUT_CONSTEXPR indexed_range(range_type& range)
|
|
: base_type(
|
|
iterator(sprout::begin(range)),
|
|
iterator(sprout::end(range))
|
|
)
|
|
{}
|
|
SPROUT_CONSTEXPR indexed_range(index_type index, range_type& range)
|
|
: base_type(
|
|
iterator(sprout::begin(range), index),
|
|
iterator(sprout::end(range), index)
|
|
)
|
|
{}
|
|
};
|
|
|
|
//
|
|
// indexed_holder
|
|
//
|
|
template<typename Index>
|
|
class indexed_holder {
|
|
public:
|
|
typedef Index index_type;
|
|
private:
|
|
index_type index_;
|
|
public:
|
|
indexed_holder() = default;
|
|
indexed_holder(indexed_holder const&) = default;
|
|
explicit SPROUT_CONSTEXPR indexed_holder(index_type index)
|
|
: index_(index)
|
|
{}
|
|
SPROUT_CONSTEXPR index_type const& index() const {
|
|
return index_;
|
|
}
|
|
};
|
|
|
|
//
|
|
// indexed_forwarder
|
|
//
|
|
class indexed_forwarder {
|
|
public:
|
|
template<typename Index>
|
|
SPROUT_CONSTEXPR sprout::adaptors::indexed_holder<Index>
|
|
operator()(Index index) const {
|
|
return sprout::adaptors::indexed_holder<Index>(index);
|
|
}
|
|
};
|
|
|
|
//
|
|
// indexed
|
|
//
|
|
namespace {
|
|
SPROUT_STATIC_CONSTEXPR sprout::adaptors::indexed_forwarder indexed = {};
|
|
} // anonymous-namespace
|
|
|
|
//
|
|
// operator|
|
|
//
|
|
template<typename Range>
|
|
inline SPROUT_CONSTEXPR sprout::adaptors::indexed_range<
|
|
typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type
|
|
>
|
|
operator|(Range&& lhs, sprout::adaptors::indexed_forwarder const&) {
|
|
return sprout::adaptors::indexed_range<
|
|
typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type
|
|
>(
|
|
sprout::lvalue_forward<Range>(lhs)
|
|
);
|
|
}
|
|
template<typename Range, typename Index>
|
|
inline SPROUT_CONSTEXPR sprout::adaptors::indexed_range<
|
|
typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type
|
|
>
|
|
operator|(Range&& lhs, sprout::adaptors::indexed_holder<Index> const& rhs) {
|
|
return sprout::adaptors::indexed_range<
|
|
typename std::remove_reference<typename sprout::lvalue_reference<Range>::type>::type
|
|
>(
|
|
rhs.index(),
|
|
sprout::lvalue_forward<Range>(lhs)
|
|
);
|
|
}
|
|
} // namespace adaptors
|
|
|
|
//
|
|
// container_construct_traits
|
|
//
|
|
template<typename Range>
|
|
struct container_construct_traits<sprout::adaptors::indexed_range<Range> >
|
|
: public sprout::container_construct_traits<typename sprout::adaptors::indexed_range<Range>::base_type>
|
|
{};
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_RANGE_ADAPTOR_INDEXED_HPP
|