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1284 lines
39 KiB
1284 lines
39 KiB
// <functional> -*- C++ -*-
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// Copyright (C) 2001-2021 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/*
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* Copyright (c) 1997
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* Silicon Graphics Computer Systems, Inc.
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Silicon Graphics makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*/
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/** @file include/functional
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* This is a Standard C++ Library header.
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*/
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#ifndef _GLIBCXX_FUNCTIONAL
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#define _GLIBCXX_FUNCTIONAL 1
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#pragma GCC system_header
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#include <bits/c++config.h>
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#include <bits/stl_function.h>
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#if __cplusplus >= 201103L
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#include <new>
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#include <tuple>
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#include <type_traits>
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#include <bits/functional_hash.h>
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#include <bits/invoke.h>
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#include <bits/refwrap.h> // std::reference_wrapper and _Mem_fn_traits
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#include <bits/std_function.h> // std::function
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#if __cplusplus > 201402L
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# include <unordered_map>
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# include <vector>
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# include <array>
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# include <utility>
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# include <bits/stl_algo.h>
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#endif
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#if __cplusplus > 201703L
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# include <bits/ranges_cmp.h>
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# include <compare>
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#endif
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#endif // C++11
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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/** @brief The type of placeholder objects defined by libstdc++.
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* @ingroup binders
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*/
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template<int _Num> struct _Placeholder { };
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#if __cplusplus >= 201103L
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#if __cplusplus >= 201703L
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# define __cpp_lib_invoke 201411L
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# if __cplusplus > 201703L
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# define __cpp_lib_constexpr_functional 201907L
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# endif
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/// Invoke a callable object.
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template<typename _Callable, typename... _Args>
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inline _GLIBCXX20_CONSTEXPR invoke_result_t<_Callable, _Args...>
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invoke(_Callable&& __fn, _Args&&... __args)
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noexcept(is_nothrow_invocable_v<_Callable, _Args...>)
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{
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return std::__invoke(std::forward<_Callable>(__fn),
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std::forward<_Args>(__args)...);
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}
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#endif // C++17
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template<typename _MemFunPtr,
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bool __is_mem_fn = is_member_function_pointer<_MemFunPtr>::value>
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class _Mem_fn_base
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: public _Mem_fn_traits<_MemFunPtr>::__maybe_type
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{
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using _Traits = _Mem_fn_traits<_MemFunPtr>;
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using _Arity = typename _Traits::__arity;
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using _Varargs = typename _Traits::__vararg;
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template<typename _Func, typename... _BoundArgs>
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friend struct _Bind_check_arity;
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_MemFunPtr _M_pmf;
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public:
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using result_type = typename _Traits::__result_type;
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explicit constexpr
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_Mem_fn_base(_MemFunPtr __pmf) noexcept : _M_pmf(__pmf) { }
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template<typename... _Args>
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_GLIBCXX20_CONSTEXPR
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auto
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operator()(_Args&&... __args) const
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noexcept(noexcept(
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std::__invoke(_M_pmf, std::forward<_Args>(__args)...)))
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-> decltype(std::__invoke(_M_pmf, std::forward<_Args>(__args)...))
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{ return std::__invoke(_M_pmf, std::forward<_Args>(__args)...); }
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};
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// Partial specialization for member object pointers.
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template<typename _MemObjPtr>
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class _Mem_fn_base<_MemObjPtr, false>
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{
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using _Arity = integral_constant<size_t, 0>;
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using _Varargs = false_type;
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template<typename _Func, typename... _BoundArgs>
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friend struct _Bind_check_arity;
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_MemObjPtr _M_pm;
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public:
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explicit constexpr
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_Mem_fn_base(_MemObjPtr __pm) noexcept : _M_pm(__pm) { }
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template<typename _Tp>
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_GLIBCXX20_CONSTEXPR
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auto
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operator()(_Tp&& __obj) const
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noexcept(noexcept(std::__invoke(_M_pm, std::forward<_Tp>(__obj))))
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-> decltype(std::__invoke(_M_pm, std::forward<_Tp>(__obj)))
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{ return std::__invoke(_M_pm, std::forward<_Tp>(__obj)); }
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};
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template<typename _MemberPointer>
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struct _Mem_fn; // undefined
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template<typename _Res, typename _Class>
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struct _Mem_fn<_Res _Class::*>
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: _Mem_fn_base<_Res _Class::*>
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{
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using _Mem_fn_base<_Res _Class::*>::_Mem_fn_base;
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};
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// 2048. Unnecessary mem_fn overloads
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/**
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* @brief Returns a function object that forwards to the member
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* pointer @a pm.
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* @ingroup functors
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*/
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template<typename _Tp, typename _Class>
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_GLIBCXX20_CONSTEXPR
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inline _Mem_fn<_Tp _Class::*>
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mem_fn(_Tp _Class::* __pm) noexcept
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{
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return _Mem_fn<_Tp _Class::*>(__pm);
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}
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/**
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* @brief Determines if the given type _Tp is a function object that
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* should be treated as a subexpression when evaluating calls to
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* function objects returned by bind().
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*
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* C++11 [func.bind.isbind].
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* @ingroup binders
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*/
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template<typename _Tp>
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struct is_bind_expression
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: public false_type { };
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/**
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* @brief Determines if the given type _Tp is a placeholder in a
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* bind() expression and, if so, which placeholder it is.
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*
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* C++11 [func.bind.isplace].
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* @ingroup binders
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*/
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template<typename _Tp>
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struct is_placeholder
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: public integral_constant<int, 0>
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{ };
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#if __cplusplus > 201402L
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template <typename _Tp> inline constexpr bool is_bind_expression_v
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= is_bind_expression<_Tp>::value;
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template <typename _Tp> inline constexpr int is_placeholder_v
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= is_placeholder<_Tp>::value;
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#endif // C++17
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/** @namespace std::placeholders
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* @brief ISO C++ 2011 namespace for std::bind placeholders.
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* @ingroup binders
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*/
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namespace placeholders
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{
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/* Define a large number of placeholders. There is no way to
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* simplify this with variadic templates, because we're introducing
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* unique names for each.
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*/
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extern const _Placeholder<1> _1;
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extern const _Placeholder<2> _2;
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extern const _Placeholder<3> _3;
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extern const _Placeholder<4> _4;
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extern const _Placeholder<5> _5;
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extern const _Placeholder<6> _6;
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extern const _Placeholder<7> _7;
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extern const _Placeholder<8> _8;
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extern const _Placeholder<9> _9;
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extern const _Placeholder<10> _10;
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extern const _Placeholder<11> _11;
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extern const _Placeholder<12> _12;
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extern const _Placeholder<13> _13;
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extern const _Placeholder<14> _14;
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extern const _Placeholder<15> _15;
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extern const _Placeholder<16> _16;
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extern const _Placeholder<17> _17;
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extern const _Placeholder<18> _18;
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extern const _Placeholder<19> _19;
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extern const _Placeholder<20> _20;
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extern const _Placeholder<21> _21;
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extern const _Placeholder<22> _22;
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extern const _Placeholder<23> _23;
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extern const _Placeholder<24> _24;
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extern const _Placeholder<25> _25;
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extern const _Placeholder<26> _26;
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extern const _Placeholder<27> _27;
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extern const _Placeholder<28> _28;
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extern const _Placeholder<29> _29;
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}
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/**
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* Partial specialization of is_placeholder that provides the placeholder
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* number for the placeholder objects defined by libstdc++.
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* @ingroup binders
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*/
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template<int _Num>
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struct is_placeholder<_Placeholder<_Num> >
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: public integral_constant<int, _Num>
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{ };
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template<int _Num>
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struct is_placeholder<const _Placeholder<_Num> >
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: public integral_constant<int, _Num>
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{ };
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// Like tuple_element_t but SFINAE-friendly.
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template<std::size_t __i, typename _Tuple>
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using _Safe_tuple_element_t
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= typename enable_if<(__i < tuple_size<_Tuple>::value),
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tuple_element<__i, _Tuple>>::type::type;
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/**
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* Maps an argument to bind() into an actual argument to the bound
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* function object [func.bind.bind]/10. Only the first parameter should
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* be specified: the rest are used to determine among the various
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* implementations. Note that, although this class is a function
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* object, it isn't entirely normal because it takes only two
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* parameters regardless of the number of parameters passed to the
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* bind expression. The first parameter is the bound argument and
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* the second parameter is a tuple containing references to the
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* rest of the arguments.
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*/
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template<typename _Arg,
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bool _IsBindExp = is_bind_expression<_Arg>::value,
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bool _IsPlaceholder = (is_placeholder<_Arg>::value > 0)>
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class _Mu;
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/**
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* If the argument is reference_wrapper<_Tp>, returns the
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* underlying reference.
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* C++11 [func.bind.bind] p10 bullet 1.
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*/
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template<typename _Tp>
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class _Mu<reference_wrapper<_Tp>, false, false>
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{
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public:
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/* Note: This won't actually work for const volatile
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* reference_wrappers, because reference_wrapper::get() is const
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* but not volatile-qualified. This might be a defect in the TR.
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*/
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template<typename _CVRef, typename _Tuple>
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_GLIBCXX20_CONSTEXPR
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_Tp&
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operator()(_CVRef& __arg, _Tuple&) const volatile
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{ return __arg.get(); }
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};
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/**
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* If the argument is a bind expression, we invoke the underlying
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* function object with the same cv-qualifiers as we are given and
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* pass along all of our arguments (unwrapped).
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* C++11 [func.bind.bind] p10 bullet 2.
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*/
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template<typename _Arg>
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class _Mu<_Arg, true, false>
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{
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public:
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template<typename _CVArg, typename... _Args>
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_GLIBCXX20_CONSTEXPR
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auto
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operator()(_CVArg& __arg,
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tuple<_Args...>& __tuple) const volatile
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-> decltype(__arg(declval<_Args>()...))
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{
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// Construct an index tuple and forward to __call
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typedef typename _Build_index_tuple<sizeof...(_Args)>::__type
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_Indexes;
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return this->__call(__arg, __tuple, _Indexes());
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}
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private:
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// Invokes the underlying function object __arg by unpacking all
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// of the arguments in the tuple.
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template<typename _CVArg, typename... _Args, std::size_t... _Indexes>
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_GLIBCXX20_CONSTEXPR
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auto
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__call(_CVArg& __arg, tuple<_Args...>& __tuple,
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const _Index_tuple<_Indexes...>&) const volatile
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-> decltype(__arg(declval<_Args>()...))
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{
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return __arg(std::get<_Indexes>(std::move(__tuple))...);
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}
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};
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/**
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* If the argument is a placeholder for the Nth argument, returns
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* a reference to the Nth argument to the bind function object.
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* C++11 [func.bind.bind] p10 bullet 3.
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*/
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template<typename _Arg>
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class _Mu<_Arg, false, true>
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{
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public:
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template<typename _Tuple>
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_GLIBCXX20_CONSTEXPR
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_Safe_tuple_element_t<(is_placeholder<_Arg>::value - 1), _Tuple>&&
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operator()(const volatile _Arg&, _Tuple& __tuple) const volatile
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{
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return
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::std::get<(is_placeholder<_Arg>::value - 1)>(std::move(__tuple));
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}
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};
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/**
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* If the argument is just a value, returns a reference to that
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* value. The cv-qualifiers on the reference are determined by the caller.
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* C++11 [func.bind.bind] p10 bullet 4.
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*/
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template<typename _Arg>
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class _Mu<_Arg, false, false>
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{
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public:
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template<typename _CVArg, typename _Tuple>
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_GLIBCXX20_CONSTEXPR
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_CVArg&&
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operator()(_CVArg&& __arg, _Tuple&) const volatile
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{ return std::forward<_CVArg>(__arg); }
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};
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// std::get<I> for volatile-qualified tuples
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template<std::size_t _Ind, typename... _Tp>
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inline auto
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__volget(volatile tuple<_Tp...>& __tuple)
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-> __tuple_element_t<_Ind, tuple<_Tp...>> volatile&
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{ return std::get<_Ind>(const_cast<tuple<_Tp...>&>(__tuple)); }
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// std::get<I> for const-volatile-qualified tuples
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template<std::size_t _Ind, typename... _Tp>
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inline auto
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__volget(const volatile tuple<_Tp...>& __tuple)
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-> __tuple_element_t<_Ind, tuple<_Tp...>> const volatile&
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{ return std::get<_Ind>(const_cast<const tuple<_Tp...>&>(__tuple)); }
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/// Type of the function object returned from bind().
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template<typename _Signature>
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class _Bind;
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template<typename _Functor, typename... _Bound_args>
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class _Bind<_Functor(_Bound_args...)>
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: public _Weak_result_type<_Functor>
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{
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typedef typename _Build_index_tuple<sizeof...(_Bound_args)>::__type
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_Bound_indexes;
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_Functor _M_f;
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tuple<_Bound_args...> _M_bound_args;
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// Call unqualified
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template<typename _Result, typename... _Args, std::size_t... _Indexes>
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_GLIBCXX20_CONSTEXPR
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_Result
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__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>)
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{
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return std::__invoke(_M_f,
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_Mu<_Bound_args>()(std::get<_Indexes>(_M_bound_args), __args)...
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);
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}
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// Call as const
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|
template<typename _Result, typename... _Args, std::size_t... _Indexes>
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_GLIBCXX20_CONSTEXPR
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|
_Result
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__call_c(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>) const
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{
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return std::__invoke(_M_f,
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_Mu<_Bound_args>()(std::get<_Indexes>(_M_bound_args), __args)...
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);
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}
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|
|
// Call as volatile
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|
template<typename _Result, typename... _Args, std::size_t... _Indexes>
|
|
_Result
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|
__call_v(tuple<_Args...>&& __args,
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|
_Index_tuple<_Indexes...>) volatile
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|
{
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|
return std::__invoke(_M_f,
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|
_Mu<_Bound_args>()(__volget<_Indexes>(_M_bound_args), __args)...
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);
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}
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|
|
// Call as const volatile
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|
template<typename _Result, typename... _Args, std::size_t... _Indexes>
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|
_Result
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|
__call_c_v(tuple<_Args...>&& __args,
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|
_Index_tuple<_Indexes...>) const volatile
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|
{
|
|
return std::__invoke(_M_f,
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|
_Mu<_Bound_args>()(__volget<_Indexes>(_M_bound_args), __args)...
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);
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|
}
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|
|
|
template<typename _BoundArg, typename _CallArgs>
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|
using _Mu_type = decltype(
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|
_Mu<typename remove_cv<_BoundArg>::type>()(
|
|
std::declval<_BoundArg&>(), std::declval<_CallArgs&>()) );
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|
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|
template<typename _Fn, typename _CallArgs, typename... _BArgs>
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|
using _Res_type_impl
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|
= typename result_of< _Fn&(_Mu_type<_BArgs, _CallArgs>&&...) >::type;
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|
|
template<typename _CallArgs>
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|
using _Res_type = _Res_type_impl<_Functor, _CallArgs, _Bound_args...>;
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template<typename _CallArgs>
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|
using __dependent = typename
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|
enable_if<bool(tuple_size<_CallArgs>::value+1), _Functor>::type;
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template<typename _CallArgs, template<class> class __cv_quals>
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|
using _Res_type_cv = _Res_type_impl<
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typename __cv_quals<__dependent<_CallArgs>>::type,
|
|
_CallArgs,
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|
typename __cv_quals<_Bound_args>::type...>;
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|
|
|
public:
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|
template<typename... _Args>
|
|
explicit _GLIBCXX20_CONSTEXPR
|
|
_Bind(const _Functor& __f, _Args&&... __args)
|
|
: _M_f(__f), _M_bound_args(std::forward<_Args>(__args)...)
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|
{ }
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|
|
template<typename... _Args>
|
|
explicit _GLIBCXX20_CONSTEXPR
|
|
_Bind(_Functor&& __f, _Args&&... __args)
|
|
: _M_f(std::move(__f)), _M_bound_args(std::forward<_Args>(__args)...)
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|
{ }
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|
|
_Bind(const _Bind&) = default;
|
|
_Bind(_Bind&&) = default;
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|
|
// Call unqualified
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|
template<typename... _Args,
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|
typename _Result = _Res_type<tuple<_Args...>>>
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|
_GLIBCXX20_CONSTEXPR
|
|
_Result
|
|
operator()(_Args&&... __args)
|
|
{
|
|
return this->__call<_Result>(
|
|
std::forward_as_tuple(std::forward<_Args>(__args)...),
|
|
_Bound_indexes());
|
|
}
|
|
|
|
// Call as const
|
|
template<typename... _Args,
|
|
typename _Result = _Res_type_cv<tuple<_Args...>, add_const>>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Result
|
|
operator()(_Args&&... __args) const
|
|
{
|
|
return this->__call_c<_Result>(
|
|
std::forward_as_tuple(std::forward<_Args>(__args)...),
|
|
_Bound_indexes());
|
|
}
|
|
|
|
#if __cplusplus > 201402L
|
|
# define _GLIBCXX_DEPR_BIND \
|
|
[[deprecated("std::bind does not support volatile in C++17")]]
|
|
#else
|
|
# define _GLIBCXX_DEPR_BIND
|
|
#endif
|
|
// Call as volatile
|
|
template<typename... _Args,
|
|
typename _Result = _Res_type_cv<tuple<_Args...>, add_volatile>>
|
|
_GLIBCXX_DEPR_BIND
|
|
_Result
|
|
operator()(_Args&&... __args) volatile
|
|
{
|
|
return this->__call_v<_Result>(
|
|
std::forward_as_tuple(std::forward<_Args>(__args)...),
|
|
_Bound_indexes());
|
|
}
|
|
|
|
// Call as const volatile
|
|
template<typename... _Args,
|
|
typename _Result = _Res_type_cv<tuple<_Args...>, add_cv>>
|
|
_GLIBCXX_DEPR_BIND
|
|
_Result
|
|
operator()(_Args&&... __args) const volatile
|
|
{
|
|
return this->__call_c_v<_Result>(
|
|
std::forward_as_tuple(std::forward<_Args>(__args)...),
|
|
_Bound_indexes());
|
|
}
|
|
};
|
|
|
|
/// Type of the function object returned from bind<R>().
|
|
template<typename _Result, typename _Signature>
|
|
class _Bind_result;
|
|
|
|
template<typename _Result, typename _Functor, typename... _Bound_args>
|
|
class _Bind_result<_Result, _Functor(_Bound_args...)>
|
|
{
|
|
typedef typename _Build_index_tuple<sizeof...(_Bound_args)>::__type
|
|
_Bound_indexes;
|
|
|
|
_Functor _M_f;
|
|
tuple<_Bound_args...> _M_bound_args;
|
|
|
|
// Call unqualified
|
|
template<typename _Res, typename... _Args, std::size_t... _Indexes>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Res
|
|
__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>)
|
|
{
|
|
return std::__invoke_r<_Res>(_M_f, _Mu<_Bound_args>()
|
|
(std::get<_Indexes>(_M_bound_args), __args)...);
|
|
}
|
|
|
|
// Call as const
|
|
template<typename _Res, typename... _Args, std::size_t... _Indexes>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Res
|
|
__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>) const
|
|
{
|
|
return std::__invoke_r<_Res>(_M_f, _Mu<_Bound_args>()
|
|
(std::get<_Indexes>(_M_bound_args), __args)...);
|
|
}
|
|
|
|
// Call as volatile
|
|
template<typename _Res, typename... _Args, std::size_t... _Indexes>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Res
|
|
__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>) volatile
|
|
{
|
|
return std::__invoke_r<_Res>(_M_f, _Mu<_Bound_args>()
|
|
(__volget<_Indexes>(_M_bound_args), __args)...);
|
|
}
|
|
|
|
// Call as const volatile
|
|
template<typename _Res, typename... _Args, std::size_t... _Indexes>
|
|
_GLIBCXX20_CONSTEXPR
|
|
_Res
|
|
__call(tuple<_Args...>&& __args,
|
|
_Index_tuple<_Indexes...>) const volatile
|
|
{
|
|
return std::__invoke_r<_Res>(_M_f, _Mu<_Bound_args>()
|
|
(__volget<_Indexes>(_M_bound_args), __args)...);
|
|
}
|
|
|
|
public:
|
|
typedef _Result result_type;
|
|
|
|
template<typename... _Args>
|
|
explicit _GLIBCXX20_CONSTEXPR
|
|
_Bind_result(const _Functor& __f, _Args&&... __args)
|
|
: _M_f(__f), _M_bound_args(std::forward<_Args>(__args)...)
|
|
{ }
|
|
|
|
template<typename... _Args>
|
|
explicit _GLIBCXX20_CONSTEXPR
|
|
_Bind_result(_Functor&& __f, _Args&&... __args)
|
|
: _M_f(std::move(__f)), _M_bound_args(std::forward<_Args>(__args)...)
|
|
{ }
|
|
|
|
_Bind_result(const _Bind_result&) = default;
|
|
_Bind_result(_Bind_result&&) = default;
|
|
|
|
// Call unqualified
|
|
template<typename... _Args>
|
|
_GLIBCXX20_CONSTEXPR
|
|
result_type
|
|
operator()(_Args&&... __args)
|
|
{
|
|
return this->__call<_Result>(
|
|
std::forward_as_tuple(std::forward<_Args>(__args)...),
|
|
_Bound_indexes());
|
|
}
|
|
|
|
// Call as const
|
|
template<typename... _Args>
|
|
_GLIBCXX20_CONSTEXPR
|
|
result_type
|
|
operator()(_Args&&... __args) const
|
|
{
|
|
return this->__call<_Result>(
|
|
std::forward_as_tuple(std::forward<_Args>(__args)...),
|
|
_Bound_indexes());
|
|
}
|
|
|
|
// Call as volatile
|
|
template<typename... _Args>
|
|
_GLIBCXX_DEPR_BIND
|
|
result_type
|
|
operator()(_Args&&... __args) volatile
|
|
{
|
|
return this->__call<_Result>(
|
|
std::forward_as_tuple(std::forward<_Args>(__args)...),
|
|
_Bound_indexes());
|
|
}
|
|
|
|
// Call as const volatile
|
|
template<typename... _Args>
|
|
_GLIBCXX_DEPR_BIND
|
|
result_type
|
|
operator()(_Args&&... __args) const volatile
|
|
{
|
|
return this->__call<_Result>(
|
|
std::forward_as_tuple(std::forward<_Args>(__args)...),
|
|
_Bound_indexes());
|
|
}
|
|
};
|
|
#undef _GLIBCXX_DEPR_BIND
|
|
|
|
/**
|
|
* @brief Class template _Bind is always a bind expression.
|
|
* @ingroup binders
|
|
*/
|
|
template<typename _Signature>
|
|
struct is_bind_expression<_Bind<_Signature> >
|
|
: public true_type { };
|
|
|
|
/**
|
|
* @brief Class template _Bind is always a bind expression.
|
|
* @ingroup binders
|
|
*/
|
|
template<typename _Signature>
|
|
struct is_bind_expression<const _Bind<_Signature> >
|
|
: public true_type { };
|
|
|
|
/**
|
|
* @brief Class template _Bind is always a bind expression.
|
|
* @ingroup binders
|
|
*/
|
|
template<typename _Signature>
|
|
struct is_bind_expression<volatile _Bind<_Signature> >
|
|
: public true_type { };
|
|
|
|
/**
|
|
* @brief Class template _Bind is always a bind expression.
|
|
* @ingroup binders
|
|
*/
|
|
template<typename _Signature>
|
|
struct is_bind_expression<const volatile _Bind<_Signature>>
|
|
: public true_type { };
|
|
|
|
/**
|
|
* @brief Class template _Bind_result is always a bind expression.
|
|
* @ingroup binders
|
|
*/
|
|
template<typename _Result, typename _Signature>
|
|
struct is_bind_expression<_Bind_result<_Result, _Signature>>
|
|
: public true_type { };
|
|
|
|
/**
|
|
* @brief Class template _Bind_result is always a bind expression.
|
|
* @ingroup binders
|
|
*/
|
|
template<typename _Result, typename _Signature>
|
|
struct is_bind_expression<const _Bind_result<_Result, _Signature>>
|
|
: public true_type { };
|
|
|
|
/**
|
|
* @brief Class template _Bind_result is always a bind expression.
|
|
* @ingroup binders
|
|
*/
|
|
template<typename _Result, typename _Signature>
|
|
struct is_bind_expression<volatile _Bind_result<_Result, _Signature>>
|
|
: public true_type { };
|
|
|
|
/**
|
|
* @brief Class template _Bind_result is always a bind expression.
|
|
* @ingroup binders
|
|
*/
|
|
template<typename _Result, typename _Signature>
|
|
struct is_bind_expression<const volatile _Bind_result<_Result, _Signature>>
|
|
: public true_type { };
|
|
|
|
template<typename _Func, typename... _BoundArgs>
|
|
struct _Bind_check_arity { };
|
|
|
|
template<typename _Ret, typename... _Args, typename... _BoundArgs>
|
|
struct _Bind_check_arity<_Ret (*)(_Args...), _BoundArgs...>
|
|
{
|
|
static_assert(sizeof...(_BoundArgs) == sizeof...(_Args),
|
|
"Wrong number of arguments for function");
|
|
};
|
|
|
|
template<typename _Ret, typename... _Args, typename... _BoundArgs>
|
|
struct _Bind_check_arity<_Ret (*)(_Args......), _BoundArgs...>
|
|
{
|
|
static_assert(sizeof...(_BoundArgs) >= sizeof...(_Args),
|
|
"Wrong number of arguments for function");
|
|
};
|
|
|
|
template<typename _Tp, typename _Class, typename... _BoundArgs>
|
|
struct _Bind_check_arity<_Tp _Class::*, _BoundArgs...>
|
|
{
|
|
using _Arity = typename _Mem_fn<_Tp _Class::*>::_Arity;
|
|
using _Varargs = typename _Mem_fn<_Tp _Class::*>::_Varargs;
|
|
static_assert(_Varargs::value
|
|
? sizeof...(_BoundArgs) >= _Arity::value + 1
|
|
: sizeof...(_BoundArgs) == _Arity::value + 1,
|
|
"Wrong number of arguments for pointer-to-member");
|
|
};
|
|
|
|
// Trait type used to remove std::bind() from overload set via SFINAE
|
|
// when first argument has integer type, so that std::bind() will
|
|
// not be a better match than ::bind() from the BSD Sockets API.
|
|
template<typename _Tp, typename _Tp2 = typename decay<_Tp>::type>
|
|
using __is_socketlike = __or_<is_integral<_Tp2>, is_enum<_Tp2>>;
|
|
|
|
template<bool _SocketLike, typename _Func, typename... _BoundArgs>
|
|
struct _Bind_helper
|
|
: _Bind_check_arity<typename decay<_Func>::type, _BoundArgs...>
|
|
{
|
|
typedef typename decay<_Func>::type __func_type;
|
|
typedef _Bind<__func_type(typename decay<_BoundArgs>::type...)> type;
|
|
};
|
|
|
|
// Partial specialization for is_socketlike == true, does not define
|
|
// nested type so std::bind() will not participate in overload resolution
|
|
// when the first argument might be a socket file descriptor.
|
|
template<typename _Func, typename... _BoundArgs>
|
|
struct _Bind_helper<true, _Func, _BoundArgs...>
|
|
{ };
|
|
|
|
/**
|
|
* @brief Function template for std::bind.
|
|
* @ingroup binders
|
|
*/
|
|
template<typename _Func, typename... _BoundArgs>
|
|
inline _GLIBCXX20_CONSTEXPR typename
|
|
_Bind_helper<__is_socketlike<_Func>::value, _Func, _BoundArgs...>::type
|
|
bind(_Func&& __f, _BoundArgs&&... __args)
|
|
{
|
|
typedef _Bind_helper<false, _Func, _BoundArgs...> __helper_type;
|
|
return typename __helper_type::type(std::forward<_Func>(__f),
|
|
std::forward<_BoundArgs>(__args)...);
|
|
}
|
|
|
|
template<typename _Result, typename _Func, typename... _BoundArgs>
|
|
struct _Bindres_helper
|
|
: _Bind_check_arity<typename decay<_Func>::type, _BoundArgs...>
|
|
{
|
|
typedef typename decay<_Func>::type __functor_type;
|
|
typedef _Bind_result<_Result,
|
|
__functor_type(typename decay<_BoundArgs>::type...)>
|
|
type;
|
|
};
|
|
|
|
/**
|
|
* @brief Function template for std::bind<R>.
|
|
* @ingroup binders
|
|
*/
|
|
template<typename _Result, typename _Func, typename... _BoundArgs>
|
|
inline _GLIBCXX20_CONSTEXPR
|
|
typename _Bindres_helper<_Result, _Func, _BoundArgs...>::type
|
|
bind(_Func&& __f, _BoundArgs&&... __args)
|
|
{
|
|
typedef _Bindres_helper<_Result, _Func, _BoundArgs...> __helper_type;
|
|
return typename __helper_type::type(std::forward<_Func>(__f),
|
|
std::forward<_BoundArgs>(__args)...);
|
|
}
|
|
|
|
#if __cplusplus > 201703L
|
|
#define __cpp_lib_bind_front 201907L
|
|
|
|
template<typename _Fd, typename... _BoundArgs>
|
|
struct _Bind_front
|
|
{
|
|
static_assert(is_move_constructible_v<_Fd>);
|
|
static_assert((is_move_constructible_v<_BoundArgs> && ...));
|
|
|
|
// First parameter is to ensure this constructor is never used
|
|
// instead of the copy/move constructor.
|
|
template<typename _Fn, typename... _Args>
|
|
explicit constexpr
|
|
_Bind_front(int, _Fn&& __fn, _Args&&... __args)
|
|
noexcept(__and_<is_nothrow_constructible<_Fd, _Fn>,
|
|
is_nothrow_constructible<_BoundArgs, _Args>...>::value)
|
|
: _M_fd(std::forward<_Fn>(__fn)),
|
|
_M_bound_args(std::forward<_Args>(__args)...)
|
|
{ static_assert(sizeof...(_Args) == sizeof...(_BoundArgs)); }
|
|
|
|
_Bind_front(const _Bind_front&) = default;
|
|
_Bind_front(_Bind_front&&) = default;
|
|
_Bind_front& operator=(const _Bind_front&) = default;
|
|
_Bind_front& operator=(_Bind_front&&) = default;
|
|
~_Bind_front() = default;
|
|
|
|
template<typename... _CallArgs>
|
|
constexpr
|
|
invoke_result_t<_Fd&, _BoundArgs&..., _CallArgs...>
|
|
operator()(_CallArgs&&... __call_args) &
|
|
noexcept(is_nothrow_invocable_v<_Fd&, _BoundArgs&..., _CallArgs...>)
|
|
{
|
|
return _S_call(*this, _BoundIndices(),
|
|
std::forward<_CallArgs>(__call_args)...);
|
|
}
|
|
|
|
template<typename... _CallArgs>
|
|
constexpr
|
|
invoke_result_t<const _Fd&, const _BoundArgs&..., _CallArgs...>
|
|
operator()(_CallArgs&&... __call_args) const &
|
|
noexcept(is_nothrow_invocable_v<const _Fd&, const _BoundArgs&...,
|
|
_CallArgs...>)
|
|
{
|
|
return _S_call(*this, _BoundIndices(),
|
|
std::forward<_CallArgs>(__call_args)...);
|
|
}
|
|
|
|
template<typename... _CallArgs>
|
|
constexpr
|
|
invoke_result_t<_Fd, _BoundArgs..., _CallArgs...>
|
|
operator()(_CallArgs&&... __call_args) &&
|
|
noexcept(is_nothrow_invocable_v<_Fd, _BoundArgs..., _CallArgs...>)
|
|
{
|
|
return _S_call(std::move(*this), _BoundIndices(),
|
|
std::forward<_CallArgs>(__call_args)...);
|
|
}
|
|
|
|
template<typename... _CallArgs>
|
|
constexpr
|
|
invoke_result_t<const _Fd, const _BoundArgs..., _CallArgs...>
|
|
operator()(_CallArgs&&... __call_args) const &&
|
|
noexcept(is_nothrow_invocable_v<const _Fd, const _BoundArgs...,
|
|
_CallArgs...>)
|
|
{
|
|
return _S_call(std::move(*this), _BoundIndices(),
|
|
std::forward<_CallArgs>(__call_args)...);
|
|
}
|
|
|
|
private:
|
|
using _BoundIndices = index_sequence_for<_BoundArgs...>;
|
|
|
|
template<typename _Tp, size_t... _Ind, typename... _CallArgs>
|
|
static constexpr
|
|
decltype(auto)
|
|
_S_call(_Tp&& __g, index_sequence<_Ind...>, _CallArgs&&... __call_args)
|
|
{
|
|
return std::invoke(std::forward<_Tp>(__g)._M_fd,
|
|
std::get<_Ind>(std::forward<_Tp>(__g)._M_bound_args)...,
|
|
std::forward<_CallArgs>(__call_args)...);
|
|
}
|
|
|
|
_Fd _M_fd;
|
|
std::tuple<_BoundArgs...> _M_bound_args;
|
|
};
|
|
|
|
template<typename _Fn, typename... _Args>
|
|
using _Bind_front_t
|
|
= _Bind_front<decay_t<_Fn>, decay_t<_Args>...>;
|
|
|
|
template<typename _Fn, typename... _Args>
|
|
constexpr _Bind_front_t<_Fn, _Args...>
|
|
bind_front(_Fn&& __fn, _Args&&... __args)
|
|
noexcept(is_nothrow_constructible_v<_Bind_front_t<_Fn, _Args...>,
|
|
int, _Fn, _Args...>)
|
|
{
|
|
return _Bind_front_t<_Fn, _Args...>(0, std::forward<_Fn>(__fn),
|
|
std::forward<_Args>(__args)...);
|
|
}
|
|
#endif
|
|
|
|
#if __cplusplus >= 201402L
|
|
/// Generalized negator.
|
|
template<typename _Fn>
|
|
class _Not_fn
|
|
{
|
|
template<typename _Fn2, typename... _Args>
|
|
using __inv_res_t = typename __invoke_result<_Fn2, _Args...>::type;
|
|
|
|
template<typename _Tp>
|
|
static decltype(!std::declval<_Tp>())
|
|
_S_not() noexcept(noexcept(!std::declval<_Tp>()));
|
|
|
|
public:
|
|
template<typename _Fn2>
|
|
constexpr
|
|
_Not_fn(_Fn2&& __fn, int)
|
|
: _M_fn(std::forward<_Fn2>(__fn)) { }
|
|
|
|
_Not_fn(const _Not_fn& __fn) = default;
|
|
_Not_fn(_Not_fn&& __fn) = default;
|
|
~_Not_fn() = default;
|
|
|
|
// Macro to define operator() with given cv-qualifiers ref-qualifiers,
|
|
// forwarding _M_fn and the function arguments with the same qualifiers,
|
|
// and deducing the return type and exception-specification.
|
|
#define _GLIBCXX_NOT_FN_CALL_OP( _QUALS ) \
|
|
template<typename... _Args> \
|
|
_GLIBCXX20_CONSTEXPR \
|
|
decltype(_S_not<__inv_res_t<_Fn _QUALS, _Args...>>()) \
|
|
operator()(_Args&&... __args) _QUALS \
|
|
noexcept(__is_nothrow_invocable<_Fn _QUALS, _Args...>::value \
|
|
&& noexcept(_S_not<__inv_res_t<_Fn _QUALS, _Args...>>())) \
|
|
{ \
|
|
return !std::__invoke(std::forward< _Fn _QUALS >(_M_fn), \
|
|
std::forward<_Args>(__args)...); \
|
|
}
|
|
_GLIBCXX_NOT_FN_CALL_OP( & )
|
|
_GLIBCXX_NOT_FN_CALL_OP( const & )
|
|
_GLIBCXX_NOT_FN_CALL_OP( && )
|
|
_GLIBCXX_NOT_FN_CALL_OP( const && )
|
|
#undef _GLIBCXX_NOT_FN_CALL_OP
|
|
|
|
private:
|
|
_Fn _M_fn;
|
|
};
|
|
|
|
template<typename _Tp, typename _Pred>
|
|
struct __is_byte_like : false_type { };
|
|
|
|
template<typename _Tp>
|
|
struct __is_byte_like<_Tp, equal_to<_Tp>>
|
|
: __bool_constant<sizeof(_Tp) == 1 && is_integral<_Tp>::value> { };
|
|
|
|
template<typename _Tp>
|
|
struct __is_byte_like<_Tp, equal_to<void>>
|
|
: __bool_constant<sizeof(_Tp) == 1 && is_integral<_Tp>::value> { };
|
|
|
|
#if __cplusplus >= 201703L
|
|
// Declare std::byte (full definition is in <cstddef>).
|
|
enum class byte : unsigned char;
|
|
|
|
template<>
|
|
struct __is_byte_like<byte, equal_to<byte>>
|
|
: true_type { };
|
|
|
|
template<>
|
|
struct __is_byte_like<byte, equal_to<void>>
|
|
: true_type { };
|
|
|
|
#define __cpp_lib_not_fn 201603
|
|
/// [func.not_fn] Function template not_fn
|
|
template<typename _Fn>
|
|
_GLIBCXX20_CONSTEXPR
|
|
inline auto
|
|
not_fn(_Fn&& __fn)
|
|
noexcept(std::is_nothrow_constructible<std::decay_t<_Fn>, _Fn&&>::value)
|
|
{
|
|
return _Not_fn<std::decay_t<_Fn>>{std::forward<_Fn>(__fn), 0};
|
|
}
|
|
|
|
// Searchers
|
|
#define __cpp_lib_boyer_moore_searcher 201603
|
|
|
|
template<typename _ForwardIterator1, typename _BinaryPredicate = equal_to<>>
|
|
class default_searcher
|
|
{
|
|
public:
|
|
_GLIBCXX20_CONSTEXPR
|
|
default_searcher(_ForwardIterator1 __pat_first,
|
|
_ForwardIterator1 __pat_last,
|
|
_BinaryPredicate __pred = _BinaryPredicate())
|
|
: _M_m(__pat_first, __pat_last, std::move(__pred))
|
|
{ }
|
|
|
|
template<typename _ForwardIterator2>
|
|
_GLIBCXX20_CONSTEXPR
|
|
pair<_ForwardIterator2, _ForwardIterator2>
|
|
operator()(_ForwardIterator2 __first, _ForwardIterator2 __last) const
|
|
{
|
|
_ForwardIterator2 __first_ret =
|
|
std::search(__first, __last, std::get<0>(_M_m), std::get<1>(_M_m),
|
|
std::get<2>(_M_m));
|
|
auto __ret = std::make_pair(__first_ret, __first_ret);
|
|
if (__ret.first != __last)
|
|
std::advance(__ret.second, std::distance(std::get<0>(_M_m),
|
|
std::get<1>(_M_m)));
|
|
return __ret;
|
|
}
|
|
|
|
private:
|
|
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{ 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 = 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<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); }
|
|
|
|
tuple<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
|
|
= conditional_t<__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
|
|
= hash<typename iterator_traits<_RAIter>::value_type>,
|
|
typename _BinaryPredicate = 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>
|
|
pair<_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
|
|
= hash<typename iterator_traits<_RAIter>::value_type>,
|
|
typename _BinaryPredicate = 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>
|
|
pair<_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 std::make_pair(__first, __first);
|
|
auto __len = __last - __first;
|
|
while (__len >= __patlen)
|
|
{
|
|
for (auto __scan = __patlen - 1;
|
|
__pred(__first[__scan], _M_pat[__scan]); --__scan)
|
|
if (__scan == 0)
|
|
return std::make_pair(__first, __first + __patlen);
|
|
auto __shift = _M_bad_char_shift(__first[__patlen - 1]);
|
|
__len -= __shift;
|
|
__first += __shift;
|
|
}
|
|
return std::make_pair(__last, __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;
|
|
};
|
|
|
|
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>
|
|
pair<_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 std::make_pair(__first, __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)
|
|
{
|
|
const auto __match = __first + __i + 1;
|
|
return std::make_pair(__match, __match + __patlen);
|
|
}
|
|
__i += std::max(_M_bad_char_shift(__first[__i]),
|
|
_M_good_suffix[__j]);
|
|
}
|
|
return std::make_pair(__last, __last);
|
|
}
|
|
|
|
#endif // C++17
|
|
#endif // C++14
|
|
#endif // C++11
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace std
|
|
|
|
#endif // _GLIBCXX_FUNCTIONAL
|