mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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85 lines
3.4 KiB
C++
85 lines
3.4 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2016 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_DETAIL_ALGORITHM_MASK_INDEX_HPP
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#define SPROUT_DETAIL_ALGORITHM_MASK_INDEX_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/container/traits.hpp>
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#include <sprout/container/functions.hpp>
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#include <sprout/iterator/operation.hpp>
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#include <sprout/type_traits/enabler_if.hpp>
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#include <sprout/algorithm/fixed/results.hpp>
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#include <sprout/pit/pit.hpp>
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#include <sprout/detail/container_complate.hpp>
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namespace sprout {
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namespace detail {
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template<typename InputIterator, typename Result, typename... Args>
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inline SPROUT_CONSTEXPR typename std::enable_if<
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sprout::container_traits<Result>::static_size == sizeof...(Args),
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typename sprout::results::algorithm<Result>::type
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>::type
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mask_index_impl(InputIterator const&, InputIterator const&, Result const& result,
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typename sprout::container_traits<Result>::size_type,
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typename sprout::container_traits<Result>::difference_type n,
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Args const&... args
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)
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{
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return sprout::remake<Result>(result, sprout::size(result), args...);
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}
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template<typename InputIterator, typename Result, typename... Args>
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inline SPROUT_CONSTEXPR typename std::enable_if<
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sprout::container_traits<Result>::static_size != sizeof...(Args),
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typename sprout::results::algorithm<Result>::type
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>::type
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mask_index_impl(
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InputIterator const& first, InputIterator const& last, Result const& result,
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typename sprout::container_traits<Result>::size_type size,
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typename sprout::container_traits<Result>::difference_type n,
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Args const&... args
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)
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{
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return first != last && sizeof...(Args) < size
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? *first
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? sprout::detail::mask_index_impl(sprout::next(first), last, result, size, n + 1, args..., n)
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: sprout::detail::mask_index_impl(sprout::next(first), last, result, size, n + 1, args...)
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: sprout::detail::container_complate(result, args...)
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;
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}
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template<typename InputIterator, typename Result>
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inline SPROUT_CONSTEXPR typename std::enable_if<
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sprout::is_fixed_container<Result>::value,
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typename sprout::results::algorithm<Result>::type
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>::type
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mask_index_(InputIterator const& first, InputIterator const& last, Result const& result) {
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return sprout::detail::mask_index_impl(first, last, result, sprout::size(result), 0);
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}
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//
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// mask_index
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//
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// recursion depth:
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// O(log N)
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//
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template<typename InputIterator, typename Result>
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inline SPROUT_CONSTEXPR typename sprout::results::algorithm<Result>::type
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mask_index(InputIterator first, InputIterator last, Result const& result) {
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return sprout::detail::mask_index_(first, last, result);
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}
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template<typename Result, typename InputIterator>
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inline SPROUT_CONSTEXPR typename sprout::results::algorithm<Result>::type
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mask_index(InputIterator first, InputIterator last) {
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return sprout::detail::mask_index(first, last, sprout::pit<Result>());
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}
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} // namespace detail
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} // namespace sprout
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#endif // #ifndef SPROUT_DETAIL_ALGORITHM_MASK_INDEX_HPP
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