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EDIT: functional
// <experimental/functional> -*- C++ -*- // Copyright (C) 2014-2018 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file experimental/functional * This is a TS C++ Library header. */ #ifndef _GLIBCXX_EXPERIMENTAL_FUNCTIONAL #define _GLIBCXX_EXPERIMENTAL_FUNCTIONAL 1 #pragma GCC system_header #if __cplusplus >= 201402L #include <functional> #include <tuple> #include <iterator> #include <unordered_map> #include <vector> #include <array> #include <bits/stl_algo.h> #ifdef _GLIBCXX_PARALLEL # include <parallel/algorithm> // For std::__parallel::search #endif #include <experimental/bits/lfts_config.h> namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION namespace experimental { inline namespace fundamentals_v1 { // See C++14 ยง20.9.9, Function object binders /// Variable template for std::is_bind_expression template<typename _Tp> constexpr bool is_bind_expression_v = std::is_bind_expression<_Tp>::value; /// Variable template for std::is_placeholder template<typename _Tp> constexpr int is_placeholder_v = std::is_placeholder<_Tp>::value; #define __cpp_lib_experimental_boyer_moore_searching 201411 // Searchers template<typename _ForwardIterator1, typename _BinaryPredicate = equal_to<>> class default_searcher { public: default_searcher(_ForwardIterator1 __pat_first, _ForwardIterator1 __pat_last, _BinaryPredicate __pred = _BinaryPredicate()) : _M_m(__pat_first, __pat_last, std::move(__pred)) { } template<typename _ForwardIterator2> _ForwardIterator2 operator()(_ForwardIterator2 __first, _ForwardIterator2 __last) const { return std::search(__first, __last, std::get<0>(_M_m), std::get<1>(_M_m), std::get<2>(_M_m)); } private: std::tuple<_ForwardIterator1, _ForwardIterator1, _BinaryPredicate> _M_m; }; template<typename _Key, typename _Tp, typename _Hash, typename _Pred> struct __boyer_moore_map_base { template<typename _RAIter> __boyer_moore_map_base(_RAIter __pat, size_t __patlen, _Hash&& __hf, _Pred&& __pred) : _M_bad_char{ __patlen, std::move(__hf), std::move(__pred) } { if (__patlen > 0) for (__diff_type __i = 0; __i < __patlen - 1; ++__i) _M_bad_char[__pat[__i]] = __patlen - 1 - __i; } using __diff_type = _Tp; __diff_type _M_lookup(_Key __key, __diff_type __not_found) const { auto __iter = _M_bad_char.find(__key); if (__iter == _M_bad_char.end()) return __not_found; return __iter->second; } _Pred _M_pred() const { return _M_bad_char.key_eq(); } _GLIBCXX_STD_C::unordered_map<_Key, _Tp, _Hash, _Pred> _M_bad_char; }; template<typename _Tp, size_t _Len, typename _Pred> struct __boyer_moore_array_base { template<typename _RAIter, typename _Unused> __boyer_moore_array_base(_RAIter __pat, size_t __patlen, _Unused&&, _Pred&& __pred) : _M_bad_char{ _GLIBCXX_STD_C::array<_Tp, _Len>{}, std::move(__pred) } { std::get<0>(_M_bad_char).fill(__patlen); if (__patlen > 0) for (__diff_type __i = 0; __i < __patlen - 1; ++__i) { auto __ch = __pat[__i]; using _UCh = std::make_unsigned_t<decltype(__ch)>; auto __uch = static_cast<_UCh>(__ch); std::get<0>(_M_bad_char)[__uch] = __patlen - 1 - __i; } } using __diff_type = _Tp; template<typename _Key> __diff_type _M_lookup(_Key __key, __diff_type __not_found) const { auto __ukey = static_cast<std::make_unsigned_t<_Key>>(__key); if (__ukey >= _Len) return __not_found; return std::get<0>(_M_bad_char)[__ukey]; } const _Pred& _M_pred() const { return std::get<1>(_M_bad_char); } std::tuple<_GLIBCXX_STD_C::array<_Tp, _Len>, _Pred> _M_bad_char; }; // Use __boyer_moore_array_base when pattern consists of narrow characters // (or std::byte) and uses std::equal_to as the predicate. template<typename _RAIter, typename _Hash, typename _Pred, typename _Val = typename iterator_traits<_RAIter>::value_type, typename _Diff = typename iterator_traits<_RAIter>::difference_type> using __boyer_moore_base_t = std::conditional_t<std::__is_byte_like<_Val, _Pred>::value, __boyer_moore_array_base<_Diff, 256, _Pred>, __boyer_moore_map_base<_Val, _Diff, _Hash, _Pred>>; template<typename _RAIter, typename _Hash = std::hash<typename std::iterator_traits<_RAIter>::value_type>, typename _BinaryPredicate = std::equal_to<>> class boyer_moore_searcher : __boyer_moore_base_t<_RAIter, _Hash, _BinaryPredicate> { using _Base = __boyer_moore_base_t<_RAIter, _Hash, _BinaryPredicate>; using typename _Base::__diff_type; public: boyer_moore_searcher(_RAIter __pat_first, _RAIter __pat_last, _Hash __hf = _Hash(), _BinaryPredicate __pred = _BinaryPredicate()); template<typename _RandomAccessIterator2> _RandomAccessIterator2 operator()(_RandomAccessIterator2 __first, _RandomAccessIterator2 __last) const; private: bool _M_is_prefix(_RAIter __word, __diff_type __len, __diff_type __pos) { const auto& __pred = this->_M_pred(); __diff_type __suffixlen = __len - __pos; for (__diff_type __i = 0; __i < __suffixlen; ++__i) if (!__pred(__word[__i], __word[__pos + __i])) return false; return true; } __diff_type _M_suffix_length(_RAIter __word, __diff_type __len, __diff_type __pos) { const auto& __pred = this->_M_pred(); __diff_type __i = 0; while (__pred(__word[__pos - __i], __word[__len - 1 - __i]) && __i < __pos) { ++__i; } return __i; } template<typename _Tp> __diff_type _M_bad_char_shift(_Tp __c) const { return this->_M_lookup(__c, _M_pat_end - _M_pat); } _RAIter _M_pat; _RAIter _M_pat_end; _GLIBCXX_STD_C::vector<__diff_type> _M_good_suffix; }; template<typename _RAIter, typename _Hash = std::hash<typename std::iterator_traits<_RAIter>::value_type>, typename _BinaryPredicate = std::equal_to<>> class boyer_moore_horspool_searcher : __boyer_moore_base_t<_RAIter, _Hash, _BinaryPredicate> { using _Base = __boyer_moore_base_t<_RAIter, _Hash, _BinaryPredicate>; using typename _Base::__diff_type; public: boyer_moore_horspool_searcher(_RAIter __pat, _RAIter __pat_end, _Hash __hf = _Hash(), _BinaryPredicate __pred = _BinaryPredicate()) : _Base(__pat, __pat_end - __pat, std::move(__hf), std::move(__pred)), _M_pat(__pat), _M_pat_end(__pat_end) { } template<typename _RandomAccessIterator2> _RandomAccessIterator2 operator()(_RandomAccessIterator2 __first, _RandomAccessIterator2 __last) const { const auto& __pred = this->_M_pred(); auto __patlen = _M_pat_end - _M_pat; if (__patlen == 0) return __first; auto __len = __last - __first; while (__len >= __patlen) { for (auto __scan = __patlen - 1; __pred(__first[__scan], _M_pat[__scan]); --__scan) if (__scan == 0) return __first; auto __shift = _M_bad_char_shift(__first[__patlen - 1]); __len -= __shift; __first += __shift; } return __last; } private: template<typename _Tp> __diff_type _M_bad_char_shift(_Tp __c) const { return this->_M_lookup(__c, _M_pat_end - _M_pat); } _RAIter _M_pat; _RAIter _M_pat_end; }; /// Generator function for default_searcher template<typename _ForwardIterator, typename _BinaryPredicate = std::equal_to<>> inline default_searcher<_ForwardIterator, _BinaryPredicate> make_default_searcher(_ForwardIterator __pat_first, _ForwardIterator __pat_last, _BinaryPredicate __pred = _BinaryPredicate()) { return { __pat_first, __pat_last, __pred }; } /// Generator function for boyer_moore_searcher template<typename _RAIter, typename _Hash = std::hash<typename std::iterator_traits<_RAIter>::value_type>, typename _BinaryPredicate = equal_to<>> inline boyer_moore_searcher<_RAIter, _Hash, _BinaryPredicate> make_boyer_moore_searcher(_RAIter __pat_first, _RAIter __pat_last, _Hash __hf = _Hash(), _BinaryPredicate __pred = _BinaryPredicate()) { return { __pat_first, __pat_last, std::move(__hf), std::move(__pred) }; } /// Generator function for boyer_moore_horspool_searcher template<typename _RAIter, typename _Hash = std::hash<typename std::iterator_traits<_RAIter>::value_type>, typename _BinaryPredicate = equal_to<>> inline boyer_moore_horspool_searcher<_RAIter, _Hash, _BinaryPredicate> make_boyer_moore_horspool_searcher(_RAIter __pat_first, _RAIter __pat_last, _Hash __hf = _Hash(), _BinaryPredicate __pred = _BinaryPredicate()) { return { __pat_first, __pat_last, std::move(__hf), std::move(__pred) }; } template<typename _RAIter, typename _Hash, typename _BinaryPredicate> boyer_moore_searcher<_RAIter, _Hash, _BinaryPredicate>:: boyer_moore_searcher(_RAIter __pat, _RAIter __pat_end, _Hash __hf, _BinaryPredicate __pred) : _Base(__pat, __pat_end - __pat, std::move(__hf), std::move(__pred)), _M_pat(__pat), _M_pat_end(__pat_end), _M_good_suffix(__pat_end - __pat) { auto __patlen = __pat_end - __pat; if (__patlen == 0) return; __diff_type __last_prefix = __patlen - 1; for (__diff_type __p = __patlen - 1; __p >= 0; --__p) { if (_M_is_prefix(__pat, __patlen, __p + 1)) __last_prefix = __p + 1; _M_good_suffix[__p] = __last_prefix + (__patlen - 1 - __p); } for (__diff_type __p = 0; __p < __patlen - 1; ++__p) { auto __slen = _M_suffix_length(__pat, __patlen, __p); auto __pos = __patlen - 1 - __slen; if (!__pred(__pat[__p - __slen], __pat[__pos])) _M_good_suffix[__pos] = __patlen - 1 - __p + __slen; } } template<typename _RAIter, typename _Hash, typename _BinaryPredicate> template<typename _RandomAccessIterator2> _RandomAccessIterator2 boyer_moore_searcher<_RAIter, _Hash, _BinaryPredicate>:: operator()(_RandomAccessIterator2 __first, _RandomAccessIterator2 __last) const { auto __patlen = _M_pat_end - _M_pat; if (__patlen == 0) return __first; const auto& __pred = this->_M_pred(); __diff_type __i = __patlen - 1; auto __stringlen = __last - __first; while (__i < __stringlen) { __diff_type __j = __patlen - 1; while (__j >= 0 && __pred(__first[__i], _M_pat[__j])) { --__i; --__j; } if (__j < 0) return __first + __i + 1; __i += std::max(_M_bad_char_shift(__first[__i]), _M_good_suffix[__j]); } return __last; } } // namespace fundamentals_v1 inline namespace fundamentals_v2 { #define __cpp_lib_experimental_not_fn 201406 /// [func.not_fn] Function template not_fn template<typename _Fn> inline auto not_fn(_Fn&& __fn) noexcept(std::is_nothrow_constructible<std::decay_t<_Fn>, _Fn&&>::value) { return std::_Not_fn<std::decay_t<_Fn>>{std::forward<_Fn>(__fn), 0}; } } // namespace fundamentals_v2 } // namespace experimental _GLIBCXX_END_NAMESPACE_VERSION } // namespace std #endif // C++14 #endif // _GLIBCXX_EXPERIMENTAL_FUNCTIONAL