386 lines
12 KiB
Text
386 lines
12 KiB
Text
|
// <experimental/functional> -*- C++ -*-
|
||
|
|
||
|
// Copyright (C) 2014-2022 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.
|
||
|
* @ingroup libfund-ts
|
||
|
*/
|
||
|
|
||
|
#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 20.9.9, 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{ std::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<std::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
|