--- /dev/null
+// <forward_list> -*- C++ -*-
+
+// Copyright (C) 2010 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 debug/forward_list
+ * This file is a GNU debug extension to the Standard C++ Library.
+ */
+
+#ifndef _GLIBCXX_DEBUG_FORWARD_LIST
+#define _GLIBCXX_DEBUG_FORWARD_LIST 1
+
+#pragma GCC system_header
+
+#include <forward_list>
+#include <debug/safe_sequence.h>
+#include <debug/safe_iterator.h>
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+namespace __debug
+{
+ /// Class std::forward_list with safety/checking/debug instrumentation.
+ template<typename _Tp, typename _Alloc = std::allocator<_Tp> >
+ class forward_list
+ : public _GLIBCXX_STD_C::forward_list<_Tp, _Alloc>,
+ public __gnu_debug::_Safe_sequence<forward_list<_Tp, _Alloc> >
+ {
+ typedef _GLIBCXX_STD_C::forward_list<_Tp, _Alloc> _Base;
+
+ typedef typename _Base::iterator _Base_iterator;
+ typedef typename _Base::const_iterator _Base_const_iterator;
+ public:
+ typedef typename _Base::reference reference;
+ typedef typename _Base::const_reference const_reference;
+
+ typedef __gnu_debug::_Safe_iterator<_Base_iterator,
+ forward_list> iterator;
+ typedef __gnu_debug::_Safe_iterator<_Base_const_iterator,
+ forward_list> const_iterator;
+
+ typedef typename _Base::size_type size_type;
+ typedef typename _Base::difference_type difference_type;
+
+ typedef _Tp value_type;
+ typedef _Alloc allocator_type;
+ typedef typename _Base::pointer pointer;
+ typedef typename _Base::const_pointer const_pointer;
+
+ // 23.2.3.1 construct/copy/destroy:
+ explicit
+ forward_list(const _Alloc& __al = _Alloc())
+ : _Base(__al) { }
+
+ forward_list(const forward_list& __list, const _Alloc& __al)
+ : _Base(__list, __al)
+ { }
+
+ forward_list(forward_list&& __list, const _Alloc& __al)
+ : _Base(std::move(__list._M_base()), __al)
+ {
+ this->_M_swap(__list);
+ }
+
+ explicit
+ forward_list(size_type __n)
+ : _Base(__n)
+ { }
+
+ forward_list(size_type __n, const _Tp& __value,
+ const _Alloc& __al = _Alloc())
+ : _Base(__n, __value, __al)
+ { }
+
+ template<typename _InputIterator>
+ forward_list(_InputIterator __first, _InputIterator __last,
+ const _Alloc& __al = _Alloc())
+ : _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first,
+ __last)),
+ __gnu_debug::__base(__last), __al)
+ { }
+
+ forward_list(const forward_list& __list)
+ : _Base(__list)
+ { }
+
+ forward_list(forward_list&& __list) noexcept
+ : _Base(std::move(__list._M_base()))
+ {
+ this->_M_swap(__list);
+ }
+
+ forward_list(std::initializer_list<_Tp> __il,
+ const _Alloc& __al = _Alloc())
+ : _Base(__il, __al)
+ { }
+
+ ~forward_list() noexcept
+ { }
+
+ forward_list&
+ operator=(const forward_list& __list)
+ {
+ static_cast<_Base&>(*this) = __list;
+ this->_M_invalidate_all();
+ return *this;
+ }
+
+ forward_list&
+ operator=(forward_list&& __list)
+ {
+ // NB: DR 1204.
+ // NB: DR 675.
+ clear();
+ swap(__list);
+ return *this;
+ }
+
+ forward_list&
+ operator=(std::initializer_list<_Tp> __il)
+ {
+ static_cast<_Base&>(*this) = __il;
+ this->_M_invalidate_all();
+ return *this;
+ }
+
+ template<typename _InputIterator>
+ void
+ assign(_InputIterator __first, _InputIterator __last)
+ {
+ __glibcxx_check_valid_range(__first, __last);
+ _Base::assign(__gnu_debug::__base(__first),
+ __gnu_debug::__base(__last));
+ this->_M_invalidate_all();
+ }
+
+ void
+ assign(size_type __n, const _Tp& __val)
+ {
+ _Base::assign(__n, __val);
+ this->_M_invalidate_all();
+ }
+
+ void
+ assign(std::initializer_list<_Tp> __il)
+ {
+ _Base::assign(__il);
+ this->_M_invalidate_all();
+ }
+
+ using _Base::get_allocator;
+
+ // iterators:
+
+ iterator
+ before_begin() noexcept
+ { return iterator(_Base::before_begin(), this); }
+
+ const_iterator
+ before_begin() const noexcept
+ { return const_iterator(_Base::before_begin(), this); }
+
+ iterator
+ begin() noexcept
+ { return iterator(_Base::begin(), this); }
+
+ const_iterator
+ begin() const noexcept
+ { return const_iterator(_Base::begin(), this); }
+
+ iterator
+ end() noexcept
+ { return iterator(_Base::end(), this); }
+
+ const_iterator
+ end() const noexcept
+ { return const_iterator(_Base::end(), this); }
+
+ const_iterator
+ cbegin() const noexcept
+ { return const_iterator(_Base::cbegin(), this); }
+
+ const_iterator
+ cbefore_begin() const noexcept
+ { return const_iterator(_Base::cbefore_begin(), this); }
+
+ const_iterator
+ cend() const noexcept
+ { return const_iterator(_Base::cend(), this); }
+
+ using _Base::empty;
+ using _Base::max_size;
+
+ // element access:
+
+ reference
+ front()
+ {
+ __glibcxx_check_nonempty();
+ return _Base::front();
+ }
+
+ const_reference
+ front() const
+ {
+ __glibcxx_check_nonempty();
+ return _Base::front();
+ }
+
+ // modiļ¬ers:
+
+ using _Base::emplace_front;
+ using _Base::push_front;
+
+ void
+ pop_front()
+ {
+ __glibcxx_check_nonempty();
+ this->_M_invalidate_if([this](_Base_const_iterator __it)
+ { return __it == this->_M_base().cbegin(); });
+ _Base::pop_front();
+ }
+
+ template<typename... _Args>
+ iterator
+ emplace_after(const_iterator __pos, _Args&&... __args)
+ {
+ __glibcxx_check_insert_after(__pos);
+ return iterator(_Base::emplace_after(__pos.base(),
+ std::forward<_Args>(__args)...),
+ this);
+ }
+
+ iterator
+ insert_after(const_iterator __pos, const _Tp& __val)
+ {
+ __glibcxx_check_insert_after(__pos);
+ return iterator(_Base::insert_after(__pos.base(), __val), this);
+ }
+
+ iterator
+ insert_after(const_iterator __pos, _Tp&& __val)
+ {
+ __glibcxx_check_insert_after(__pos);
+ return iterator(_Base::insert_after(__pos.base(), std::move(__val)),
+ this);
+ }
+
+ iterator
+ insert_after(const_iterator __pos, size_type __n, const _Tp& __val)
+ {
+ __glibcxx_check_insert_after(__pos);
+ return iterator(_Base::insert_after(__pos.base(), __n, __val),
+ this);
+ }
+
+ template<typename _InputIterator>
+ iterator
+ insert_after(const_iterator __pos,
+ _InputIterator __first, _InputIterator __last)
+ {
+ __glibcxx_check_insert_range_after(__pos, __first, __last);
+ return iterator(_Base::insert_after(__pos.base(),
+ __gnu_debug::__base(__first),
+ __gnu_debug::__base(__last)),
+ this);
+ }
+
+ iterator
+ insert_after(const_iterator __pos, std::initializer_list<_Tp> __il)
+ {
+ __glibcxx_check_insert_after(__pos);
+ return iterator(_Base::insert_after(__pos.base(), __il), this);
+ }
+
+ private:
+ _Base_iterator
+ _M_erase_after(_Base_const_iterator __pos)
+ {
+ _Base_const_iterator __next = std::next(__pos);
+ this->_M_invalidate_if([__next](_Base_const_iterator __it)
+ { return __it == __next; });
+ return _Base::erase_after(__pos);
+ }
+ public:
+ iterator
+ erase_after(const_iterator __pos)
+ {
+ __glibcxx_check_erase_after(__pos);
+ return iterator(_M_erase_after(__pos.base()), this);
+ }
+
+ iterator
+ erase_after(const_iterator __pos, const_iterator __last)
+ {
+ __glibcxx_check_erase_range_after(__pos, __last);
+ for (_Base_const_iterator __victim = std::next(__pos.base());
+ __victim != __last.base(); ++__victim)
+ {
+ _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(),
+ _M_message(__gnu_debug::__msg_valid_range2)
+ ._M_sequence(*this, "this")
+ ._M_iterator(__pos, "pos")
+ ._M_iterator(__last, "last"));
+ this->_M_invalidate_if([__victim](_Base_const_iterator __it)
+ { return __it == __victim; });
+ }
+ return iterator(_Base::erase_after(__pos.base(), __last.base()), this);
+ }
+
+ void
+ swap(forward_list& __list)
+ {
+ _Base::swap(__list);
+ this->_M_swap(__list);
+ }
+
+ void
+ resize(size_type __sz)
+ {
+ this->_M_detach_singular();
+
+ // if __sz < size(), invalidate all iterators in [begin+__sz, end()
+ _Base_iterator __victim = _Base::begin();
+ _Base_iterator __end = _Base::end();
+ for (size_type __i = __sz; __victim != __end && __i > 0; --__i)
+ ++__victim;
+
+ for (; __victim != __end; ++__victim)
+ {
+ this->_M_invalidate_if([__victim](_Base_const_iterator __it)
+ { return __it == __victim; });
+ }
+
+ __try
+ {
+ _Base::resize(__sz);
+ }
+ __catch(...)
+ {
+ this->_M_revalidate_singular();
+ __throw_exception_again;
+ }
+ }
+
+ void
+ resize(size_type __sz, const value_type& __val)
+ {
+ this->_M_detach_singular();
+
+ // if __sz < size(), invalidate all iterators in [begin+__sz, end())
+ _Base_iterator __victim = _Base::begin();
+ _Base_iterator __end = _Base::end();
+ for (size_type __i = __sz; __victim != __end && __i > 0; --__i)
+ ++__victim;
+
+ for (; __victim != __end; ++__victim)
+ {
+ this->_M_invalidate_if([__victim](_Base_const_iterator __it)
+ { return __it == __victim; });
+ }
+
+ __try
+ {
+ _Base::resize(__sz, __val);
+ }
+ __catch(...)
+ {
+ this->_M_revalidate_singular();
+ __throw_exception_again;
+ }
+ }
+
+ void
+ clear() noexcept
+ {
+ _Base::clear();
+ this->_M_invalidate_all();
+ }
+
+ // 23.2.3.5 forward_list operations:
+ void
+ splice_after(const_iterator __pos, forward_list&& __list)
+ {
+ __glibcxx_check_insert_after(__pos);
+ _GLIBCXX_DEBUG_VERIFY(&__list != this,
+ _M_message(__gnu_debug::__msg_self_splice)
+ ._M_sequence(*this, "this"));
+ this->_M_transfer_from_if(__list, [&__list](_Base_const_iterator __it)
+ {
+ return __it != __list._M_base().cbefore_begin()
+ && __it != __list._M_base().end();
+ });
+ _Base::splice_after(__pos.base(), std::move(__list._M_base()));
+ }
+
+ void
+ splice_after(const_iterator __pos, forward_list& __list)
+ { splice_after(__pos, std::move(__list)); }
+
+ void
+ splice_after(const_iterator __pos, forward_list&& __list,
+ const_iterator __i)
+ {
+ __glibcxx_check_insert_after(__pos);
+ _GLIBCXX_DEBUG_VERIFY(__i._M_before_dereferenceable(),
+ _M_message(__gnu_debug::__msg_splice_bad)
+ ._M_iterator(__i, "__i"));
+ _GLIBCXX_DEBUG_VERIFY(__i._M_attached_to(&__list),
+ _M_message(__gnu_debug::__msg_splice_other)
+ ._M_iterator(__i, "__i")
+ ._M_sequence(__list, "__list"));
+
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 250. splicing invalidates iterators
+ _Base_const_iterator __next = std::next(__i.base());
+ this->_M_transfer_from_if(__list, [__next](_Base_const_iterator __it)
+ { return __it == __next; });
+ _Base::splice_after(__pos.base(), std::move(__list._M_base()),
+ __i.base());
+ }
+
+ void
+ splice_after(const_iterator __pos, forward_list& __list,
+ const_iterator __i)
+ { splice_after(__pos, std::move(__list), __i); }
+
+ void
+ splice_after(const_iterator __pos, forward_list&& __list,
+ const_iterator __before, const_iterator __last)
+ {
+ __glibcxx_check_insert_after(__pos);
+ __glibcxx_check_valid_range(__before, __last);
+ _GLIBCXX_DEBUG_VERIFY(__before._M_attached_to(&__list),
+ _M_message(__gnu_debug::__msg_splice_other)
+ ._M_sequence(__list, "list")
+ ._M_iterator(__before, "before"));
+ _GLIBCXX_DEBUG_VERIFY(__before._M_dereferenceable()
+ || __before._M_is_before_begin(),
+ _M_message(__gnu_debug::__msg_valid_range2)
+ ._M_sequence(__list, "list")
+ ._M_iterator(__before, "before")
+ ._M_iterator(__last, "last"));
+ _GLIBCXX_DEBUG_VERIFY(__before != __last,
+ _M_message(__gnu_debug::__msg_valid_range2)
+ ._M_sequence(__list, "list")
+ ._M_iterator(__before, "before")
+ ._M_iterator(__last, "last"));
+
+ for (_Base_const_iterator __tmp = std::next(__before.base());
+ __tmp != __last.base(); ++__tmp)
+ {
+ _GLIBCXX_DEBUG_VERIFY(__tmp != __list._M_base().end(),
+ _M_message(__gnu_debug::__msg_valid_range2)
+ ._M_sequence(__list, "list")
+ ._M_iterator(__before, "before")
+ ._M_iterator(__last, "last"));
+ _GLIBCXX_DEBUG_VERIFY(&__list != this || __tmp != __pos.base(),
+ _M_message(__gnu_debug::__msg_splice_overlap)
+ ._M_iterator(__tmp, "position")
+ ._M_iterator(__before, "before")
+ ._M_iterator(__last, "last"));
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // 250. splicing invalidates iterators
+ this->_M_transfer_from_if(__list, [__tmp](_Base_const_iterator __it)
+ { return __it == __tmp; });
+ }
+
+ _Base::splice_after(__pos.base(), std::move(__list._M_base()),
+ __before.base(), __last.base());
+ }
+
+ void
+ splice_after(const_iterator __pos, forward_list& __list,
+ const_iterator __before, const_iterator __last)
+ { splice_after(__pos, std::move(__list), __before, __last); }
+
+ void
+ remove(const _Tp& __val)
+ {
+ _Base_iterator __x = _Base::before_begin();
+ _Base_iterator __old = __x++;
+ while (__x != _Base::end())
+ {
+ if (*__x == __val)
+ __x = _M_erase_after(__old);
+ else
+ __old = __x++;
+ }
+ }
+
+ template<typename _Pred>
+ void
+ remove_if(_Pred __pred)
+ {
+ _Base_iterator __x = _Base::before_begin();
+ _Base_iterator __old = __x++;
+ while (__x != _Base::end())
+ {
+ if (__pred(*__x))
+ __x = _M_erase_after(__old);
+ else
+ __old = __x++;
+ }
+ }
+
+ void
+ unique()
+ {
+ _Base_iterator __first = _Base::begin();
+ _Base_iterator __last = _Base::end();
+ if (__first == __last)
+ return;
+ _Base_iterator __next = std::next(__first);
+ while (__next != __last)
+ {
+ if (*__first == *__next)
+ __next = _M_erase_after(__first);
+ else
+ __first = __next++;
+ }
+ }
+
+ template<typename _BinPred>
+ void
+ unique(_BinPred __binary_pred)
+ {
+ _Base_iterator __first = _Base::begin();
+ _Base_iterator __last = _Base::end();
+ if (__first == __last)
+ return;
+ _Base_iterator __next = std::next(__first);
+ while (__next != __last)
+ {
+ if (__binary_pred(*__first, *__next))
+ __next = _M_erase_after(__first);
+ else
+ __first = __next++;
+ }
+ }
+
+ void
+ merge(forward_list&& __list)
+ {
+ if (this != &__list)
+ {
+ __glibcxx_check_sorted(_Base::begin(), _Base::end());
+ __glibcxx_check_sorted(__list._M_base().begin(),
+ __list._M_base().end());
+ this->_M_transfer_from_if(__list, [&__list](_Base_const_iterator __it)
+ {
+ return __it != __list._M_base().cbefore_begin()
+ && __it != __list._M_base().cend();
+ });
+ _Base::merge(std::move(__list._M_base()));
+ }
+ }
+
+ void
+ merge(forward_list& __list)
+ { merge(std::move(__list)); }
+
+ template<typename _Comp>
+ void
+ merge(forward_list&& __list, _Comp __comp)
+ {
+ if (this != &__list)
+ {
+ __glibcxx_check_sorted_pred(_Base::begin(), _Base::end(), __comp);
+ __glibcxx_check_sorted_pred(__list._M_base().begin(),
+ __list._M_base().end(), __comp);
+ this->_M_transfer_from_if(__list,
+ [&__list](_Base_const_iterator __it)
+ {
+ return __it != __list._M_base().cbefore_begin()
+ && __it != __list._M_base().cend();
+ });
+ _Base::merge(std::move(__list._M_base()), __comp);
+ }
+ }
+
+ template<typename _Comp>
+ void
+ merge(forward_list& __list, _Comp __comp)
+ { merge(std::move(__list), __comp); }
+
+ using _Base::sort;
+ using _Base::reverse;
+
+ _Base&
+ _M_base() noexcept { return *this; }
+
+ const _Base&
+ _M_base() const noexcept { return *this; }
+
+ private:
+ void
+ _M_invalidate_all()
+ {
+ this->_M_invalidate_if([this](_Base_const_iterator __it)
+ {
+ return __it != this->_M_base().cbefore_begin()
+ && __it != this->_M_base().cend();
+ });
+ }
+ typedef __gnu_debug::_Safe_iterator_base _Safe_iterator_base;
+ static void
+ _M_swap_aux(forward_list& __lhs,
+ _Safe_iterator_base*& __lhs_iterators,
+ forward_list& __rhs,
+ _Safe_iterator_base*& __rhs_iterators);
+ void _M_swap(forward_list& __list);
+ };
+
+ template<typename _Tp, typename _Alloc>
+ void
+ forward_list<_Tp, _Alloc>::
+ _M_swap_aux(forward_list<_Tp, _Alloc>& __lhs,
+ __gnu_debug::_Safe_iterator_base*& __lhs_iterators,
+ forward_list<_Tp, _Alloc>& __rhs,
+ __gnu_debug::_Safe_iterator_base*& __rhs_iterators)
+ {
+ using __gnu_debug::_Safe_iterator_base;
+ _Safe_iterator_base* __bbegin_its = 0;
+ _Safe_iterator_base* __last_bbegin = 0;
+ for (_Safe_iterator_base* __iter = __lhs_iterators; __iter;)
+ {
+ // Even iterator are casted to const_iterator, not a problem.
+ const_iterator* __victim = static_cast<const_iterator*>(__iter);
+ __iter = __iter->_M_next;
+ if (__victim->base() == __rhs._M_base().cbefore_begin())
+ {
+ __victim->_M_unlink();
+ if (__lhs_iterators == __victim)
+ __lhs_iterators = __victim->_M_next;
+ if (__bbegin_its)
+ {
+ __victim->_M_next = __bbegin_its;
+ __bbegin_its->_M_prior = __victim;
+ }
+ else
+ __last_bbegin = __victim;
+ __bbegin_its = __victim;
+ }
+ else
+ __victim->_M_sequence = &__lhs;
+ }
+
+ if (__bbegin_its)
+ {
+ if (__rhs_iterators)
+ {
+ __rhs_iterators->_M_prior = __last_bbegin;
+ __last_bbegin->_M_next = __rhs_iterators;
+ }
+ __rhs_iterators = __bbegin_its;
+ }
+ }
+
+ /* Special forward_list _M_swap version that do not swap the
+ * before-begin ownership.*/
+ template<typename _Tp, typename _Alloc>
+ void
+ forward_list<_Tp, _Alloc>::
+ _M_swap(forward_list<_Tp, _Alloc>& __list)
+ {
+ __gnu_cxx::__scoped_lock sentry(this->_M_get_mutex());
+ std::swap(this->_M_iterators, __list._M_iterators);
+ std::swap(this->_M_const_iterators, __list._M_const_iterators);
+ // Useless, always 1 on forward_list
+ //std::swap(this->_M_version, __list._M_version);
+ _Safe_iterator_base* __this_its = this->_M_iterators;
+ _M_swap_aux(__list, __list._M_iterators, *this, this->_M_iterators);
+ _Safe_iterator_base* __this_const_its = this->_M_const_iterators;
+ _M_swap_aux(__list, __list._M_const_iterators, *this,
+ this->_M_const_iterators);
+ _M_swap_aux(*this, __this_its, __list, __list._M_iterators);
+ _M_swap_aux(*this, __this_const_its, __list, __list._M_const_iterators);
+ }
+
+ template<typename _Tp, typename _Alloc>
+ bool
+ operator==(const forward_list<_Tp, _Alloc>& __lx,
+ const forward_list<_Tp, _Alloc>& __ly)
+ { return __lx._M_base() == __ly._M_base(); }
+
+ template<typename _Tp, typename _Alloc>
+ inline bool
+ operator<(const forward_list<_Tp, _Alloc>& __lx,
+ const forward_list<_Tp, _Alloc>& __ly)
+ { return __lx._M_base() < __ly._M_base(); }
+
+ template<typename _Tp, typename _Alloc>
+ inline bool
+ operator!=(const forward_list<_Tp, _Alloc>& __lx,
+ const forward_list<_Tp, _Alloc>& __ly)
+ { return !(__lx == __ly); }
+
+ /// Based on operator<
+ template<typename _Tp, typename _Alloc>
+ inline bool
+ operator>(const forward_list<_Tp, _Alloc>& __lx,
+ const forward_list<_Tp, _Alloc>& __ly)
+ { return (__ly < __lx); }
+
+ /// Based on operator<
+ template<typename _Tp, typename _Alloc>
+ inline bool
+ operator>=(const forward_list<_Tp, _Alloc>& __lx,
+ const forward_list<_Tp, _Alloc>& __ly)
+ { return !(__lx < __ly); }
+
+ /// Based on operator<
+ template<typename _Tp, typename _Alloc>
+ inline bool
+ operator<=(const forward_list<_Tp, _Alloc>& __lx,
+ const forward_list<_Tp, _Alloc>& __ly)
+ { return !(__ly < __lx); }
+
+ /// See std::forward_list::swap().
+ template<typename _Tp, typename _Alloc>
+ inline void
+ swap(forward_list<_Tp, _Alloc>& __lx,
+ forward_list<_Tp, _Alloc>& __ly)
+ { __lx.swap(__ly); }
+
+} // namespace __debug
+} // namespace std
+
+namespace __gnu_debug
+{
+ template<class _Tp, class _Alloc>
+ struct _BeforeBeginHelper<std::__debug::forward_list<_Tp, _Alloc> >
+ {
+ typedef std::__debug::forward_list<_Tp, _Alloc> _Sequence;
+ typedef typename _Sequence::const_iterator _It;
+ typedef typename _It::iterator_type _BaseIt;
+
+ static bool
+ _S_Is(_BaseIt __it, const _Sequence* __seq)
+ { return __it == __seq->_M_base().cbefore_begin(); }
+
+ static bool
+ _S_Is_Beginnest(_BaseIt __it, const _Sequence* __seq)
+ { return _S_Is(__it, __seq); }
+ };
+}
+
+#endif
projects / cross.git / blobdiff