38b17c27ce
libstdc++-v3/ChangeLog: * include/debug/assertions.h (__glibcxx_requires_non_empty_range): Remove __builtin_expect. (__glibcxx_requires_subscript): Likewise. (__glibcxx_requires_nonempty): Likewise. * include/debug/formatter.h (__check_singular): Add C++11 constexpr qualification. * include/debug/helper_functions.h (__check_singular): Likewise. Skip check if constant evaluated. (__valid_range): Do not skip check if constant evaluated. * include/debug/macros.h (_GLIBCXX_DEBUG_VERIFY_COND_AT): Add __builtin_expect. (_GLIBCXX_DEBUG_VERIFY_AT_F): Use __glibcxx_assert_1. * testsuite/21_strings/basic_string_view/element_access/char/back_constexpr_neg.cc: New test. * testsuite/21_strings/basic_string_view/element_access/char/constexpr.cc: New test. * testsuite/21_strings/basic_string_view/element_access/char/constexpr_neg.cc: New test. * testsuite/21_strings/basic_string_view/element_access/char/front_back_constexpr.cc: New test. * testsuite/21_strings/basic_string_view/element_access/char/front_constexpr_neg.cc: New test. * testsuite/21_strings/basic_string_view/element_access/wchar_t/back_constexpr_neg.cc: New test. * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr.cc: New test. * testsuite/21_strings/basic_string_view/element_access/wchar_t/constexpr_neg.cc: New test. * testsuite/21_strings/basic_string_view/element_access/wchar_t/front_constexpr_neg.cc: New test. * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_neg.cc: New test. * testsuite/25_algorithms/lower_bound/debug/constexpr_partitioned_pred_neg.cc: New test. * testsuite/25_algorithms/lower_bound/debug/constexpr_valid_range_neg.cc: New test. * testsuite/25_algorithms/lower_bound/debug/partitioned_neg.cc: New test. * testsuite/25_algorithms/lower_bound/debug/partitioned_pred_neg.cc: New test. * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_neg.cc: New test. * testsuite/25_algorithms/upper_bound/debug/constexpr_partitioned_pred_neg.cc: New test. * testsuite/25_algorithms/upper_bound/debug/constexpr_valid_range_neg.cc: New test. * testsuite/25_algorithms/upper_bound/debug/partitioned_neg.cc: New test. * testsuite/25_algorithms/upper_bound/debug/partitioned_pred_neg.cc: New test.
456 lines
20 KiB
C++
456 lines
20 KiB
C++
// Debugging support implementation -*- C++ -*-
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// Copyright (C) 2003-2020 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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/** @file debug/macros.h
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* This file is a GNU debug extension to the Standard C++ Library.
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*/
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#ifndef _GLIBCXX_DEBUG_MACROS_H
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#define _GLIBCXX_DEBUG_MACROS_H 1
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/**
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* Macros used by the implementation to verify certain
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* properties. These macros may only be used directly by the debug
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* wrappers. Note that these are macros (instead of the more obviously
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* @a correct choice of making them functions) because we need line and
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* file information at the call site, to minimize the distance between
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* the user error and where the error is reported.
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*
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*/
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#define _GLIBCXX_DEBUG_VERIFY_COND_AT(_Cond,_ErrMsg,_File,_Line,_Func) \
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if (__builtin_expect(!bool(_Cond), false)) \
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__gnu_debug::_Error_formatter::_S_at(_File, _Line, _Func) \
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._ErrMsg._M_error()
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#define _GLIBCXX_DEBUG_VERIFY_AT_F(_Cond,_ErrMsg,_File,_Line,_Func) \
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do { \
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__glibcxx_assert_1(_Cond) \
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{ _GLIBCXX_DEBUG_VERIFY_COND_AT(_Cond,_ErrMsg,_File,_Line,_Func); } \
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} while (false)
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#define _GLIBCXX_DEBUG_VERIFY_AT(_Cond,_ErrMsg,_File,_Line) \
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_GLIBCXX_DEBUG_VERIFY_AT_F(_Cond,_ErrMsg,_File,_Line,__PRETTY_FUNCTION__)
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#define _GLIBCXX_DEBUG_VERIFY(_Cond,_ErrMsg) \
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_GLIBCXX_DEBUG_VERIFY_AT_F(_Cond, _ErrMsg, __FILE__, __LINE__, \
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__PRETTY_FUNCTION__)
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// Verify that [_First, _Last) forms a valid iterator range.
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#define __glibcxx_check_valid_range(_First,_Last) \
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_GLIBCXX_DEBUG_VERIFY(__gnu_debug::__valid_range(_First, _Last), \
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_M_message(__gnu_debug::__msg_valid_range) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last))
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#define __glibcxx_check_valid_range_at(_First,_Last,_File,_Line,_Func) \
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_GLIBCXX_DEBUG_VERIFY_AT_F(__gnu_debug::__valid_range(_First, _Last), \
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_M_message(__gnu_debug::__msg_valid_range) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last), \
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_File,_Line,_Func)
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#define __glibcxx_check_valid_range2(_First,_Last,_Dist) \
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_GLIBCXX_DEBUG_VERIFY(__gnu_debug::__valid_range(_First, _Last, _Dist), \
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_M_message(__gnu_debug::__msg_valid_range) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last))
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#define __glibcxx_check_valid_constructor_range(_First,_Last) \
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__gnu_debug::__check_valid_range(_First, _Last, \
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__FILE__, __LINE__, __PRETTY_FUNCTION__)
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// Verify that [_First, _Last) forms a non-empty iterator range.
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#define __glibcxx_check_non_empty_range(_First,_Last) \
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_GLIBCXX_DEBUG_VERIFY(_First != _Last, \
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_M_message(__gnu_debug::__msg_non_empty_range) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last))
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// Verify that [_First, _First + _Size) forms a valid range.
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#define __glibcxx_check_can_increment(_First,_Size) \
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_GLIBCXX_DEBUG_VERIFY(__gnu_debug::__can_advance(_First, _Size), \
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_M_message(__gnu_debug::__msg_iter_subscript_oob) \
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._M_iterator(_First, #_First) \
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._M_integer(_Size, #_Size))
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#define __glibcxx_check_can_increment_range(_First1,_Last1,_First2) \
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do \
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{ \
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typename __gnu_debug::_Distance_traits<__decltype(_First1)>::__type __dist;\
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_GLIBCXX_DEBUG_VERIFY_COND_AT( \
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__gnu_debug::__valid_range(_First1, _Last1, __dist),\
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_M_message(__gnu_debug::__msg_valid_range) \
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._M_iterator(_First1, #_First1) \
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._M_iterator(_Last1, #_Last1), \
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__FILE__,__LINE__,__PRETTY_FUNCTION__); \
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_GLIBCXX_DEBUG_VERIFY_COND_AT( \
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__gnu_debug::__can_advance(_First2, __dist.first),\
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_M_message(__gnu_debug::__msg_iter_subscript_oob)\
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._M_iterator(_First2, #_First2) \
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._M_integer(__dist.first), \
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__FILE__,__LINE__,__PRETTY_FUNCTION__); \
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} while(false)
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#define __glibcxx_check_can_decrement_range(_First1,_Last1,_First2) \
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do \
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{ \
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typename __gnu_debug::_Distance_traits<__decltype(_First1)>::__type __dist;\
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_GLIBCXX_DEBUG_VERIFY_COND_AT( \
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__gnu_debug::__valid_range(_First1, _Last1, __dist),\
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_M_message(__gnu_debug::__msg_valid_range) \
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._M_iterator(_First1, #_First1) \
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._M_iterator(_Last1, #_Last1), \
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__FILE__,__LINE__,__PRETTY_FUNCTION__); \
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_GLIBCXX_DEBUG_VERIFY_COND_AT( \
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__gnu_debug::__can_advance(_First2, -__dist.first),\
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_M_message(__gnu_debug::__msg_iter_subscript_oob)\
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._M_iterator(_First2, #_First2) \
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._M_integer(-__dist.first), \
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__FILE__,__LINE__,__PRETTY_FUNCTION__); \
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} while(false)
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/** Verify that we can insert into *this with the iterator _Position.
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* Insertion into a container at a specific position requires that
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* the iterator be nonsingular, either dereferenceable or past-the-end,
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* and that it reference the sequence we are inserting into. Note that
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* this macro is only valid when the container is a_Safe_sequence and
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* the iterator is a _Safe_iterator.
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*/
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#define __glibcxx_check_insert(_Position) \
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_GLIBCXX_DEBUG_VERIFY(!_Position._M_singular(), \
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_M_message(__gnu_debug::__msg_insert_singular) \
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._M_sequence(*this, "this") \
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._M_iterator(_Position, #_Position)); \
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_GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this), \
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_M_message(__gnu_debug::__msg_insert_different) \
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._M_sequence(*this, "this") \
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._M_iterator(_Position, #_Position))
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/** Verify that we can insert into *this after the iterator _Position.
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* Insertion into a container after a specific position requires that
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* the iterator be nonsingular, either dereferenceable or before-begin,
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* and that it reference the sequence we are inserting into. Note that
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* this macro is only valid when the container is a_Safe_sequence and
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* the iterator is a _Safe_iterator.
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*/
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#define __glibcxx_check_insert_after(_Position) \
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__glibcxx_check_insert(_Position); \
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_GLIBCXX_DEBUG_VERIFY(!_Position._M_is_end(), \
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_M_message(__gnu_debug::__msg_insert_after_end) \
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._M_sequence(*this, "this") \
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._M_iterator(_Position, #_Position))
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/** Verify that we can insert the values in the iterator range
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* [_First, _Last) into *this with the iterator _Position. Insertion
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* into a container at a specific position requires that the iterator
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* be nonsingular (i.e., either dereferenceable or past-the-end),
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* that it reference the sequence we are inserting into, and that the
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* iterator range [_First, _Last) is a valid (possibly empty)
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* range which does not reference the sequence we are inserting into.
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* Note that this macro is only valid when the container is a
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* _Safe_sequence and the _Position iterator is a _Safe_iterator.
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*/
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#define __glibcxx_check_insert_range(_Position,_First,_Last,_Dist) \
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__glibcxx_check_valid_range2(_First,_Last,_Dist); \
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__glibcxx_check_insert(_Position); \
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_GLIBCXX_DEBUG_VERIFY(__gnu_debug::__foreign_iterator(_Position,_First,_Last),\
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_M_message(__gnu_debug::__msg_insert_range_from_self)\
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last) \
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._M_sequence(*this, "this"))
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/** Verify that we can insert the values in the iterator range
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* [_First, _Last) into *this after the iterator _Position. Insertion
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* into a container after a specific position requires that the iterator
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* be nonsingular (i.e., either dereferenceable or past-the-end),
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* that it reference the sequence we are inserting into, and that the
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* iterator range [_First, _Last) is a valid (possibly empty)
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* range which does not reference the sequence we are inserting into.
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* Note that this macro is only valid when the container is a
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* _Safe_sequence and the _Position iterator is a _Safe_iterator.
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*/
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#define __glibcxx_check_insert_range_after(_Position,_First,_Last,_Dist)\
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__glibcxx_check_valid_range2(_First,_Last,_Dist); \
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__glibcxx_check_insert_after(_Position); \
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_GLIBCXX_DEBUG_VERIFY(__gnu_debug::__foreign_iterator(_Position,_First,_Last),\
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_M_message(__gnu_debug::__msg_insert_range_from_self)\
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last) \
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._M_sequence(*this, "this"))
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/** Verify that we can erase the element referenced by the iterator
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* _Position. We can erase the element if the _Position iterator is
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* dereferenceable and references this sequence.
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*/
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#define __glibcxx_check_erase(_Position) \
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_GLIBCXX_DEBUG_VERIFY(_Position._M_dereferenceable(), \
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_M_message(__gnu_debug::__msg_erase_bad) \
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._M_sequence(*this, "this") \
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._M_iterator(_Position, #_Position)); \
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_GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this), \
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_M_message(__gnu_debug::__msg_erase_different) \
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._M_sequence(*this, "this") \
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._M_iterator(_Position, #_Position))
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/** Verify that we can erase the element after the iterator
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* _Position. We can erase the element if the _Position iterator is
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* before a dereferenceable one and references this sequence.
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*/
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#define __glibcxx_check_erase_after(_Position) \
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_GLIBCXX_DEBUG_VERIFY(_Position._M_before_dereferenceable(), \
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_M_message(__gnu_debug::__msg_erase_after_bad) \
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._M_sequence(*this, "this") \
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._M_iterator(_Position, #_Position)); \
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_GLIBCXX_DEBUG_VERIFY(_Position._M_attached_to(this), \
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_M_message(__gnu_debug::__msg_erase_different) \
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._M_sequence(*this, "this") \
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._M_iterator(_Position, #_Position))
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/** Verify that we can erase the elements in the iterator range
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* [_First, _Last). We can erase the elements if [_First, _Last) is a
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* valid iterator range within this sequence.
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*/
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#define __glibcxx_check_erase_range(_First,_Last) \
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__glibcxx_check_valid_range(_First,_Last); \
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_GLIBCXX_DEBUG_VERIFY(_First._M_attached_to(this), \
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_M_message(__gnu_debug::__msg_erase_different) \
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._M_sequence(*this, "this") \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last))
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/** Verify that we can erase the elements in the iterator range
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* (_First, _Last). We can erase the elements if (_First, _Last) is a
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* valid iterator range within this sequence.
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*/
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#define __glibcxx_check_erase_range_after(_First,_Last) \
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_GLIBCXX_DEBUG_VERIFY(_First._M_can_compare(_Last), \
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_M_message(__gnu_debug::__msg_erase_different) \
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._M_sequence(*this, "this") \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last)); \
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_GLIBCXX_DEBUG_VERIFY(_First._M_attached_to(this), \
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_M_message(__gnu_debug::__msg_erase_different) \
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._M_sequence(*this, "this") \
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._M_iterator(_First, #_First)); \
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_GLIBCXX_DEBUG_VERIFY(_First != _Last, \
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_M_message(__gnu_debug::__msg_valid_range2) \
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._M_sequence(*this, "this") \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last)); \
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_GLIBCXX_DEBUG_VERIFY(_First._M_incrementable(), \
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_M_message(__gnu_debug::__msg_valid_range2) \
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._M_sequence(*this, "this") \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last)); \
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_GLIBCXX_DEBUG_VERIFY(!_Last._M_is_before_begin(), \
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_M_message(__gnu_debug::__msg_valid_range2) \
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._M_sequence(*this, "this") \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last)) \
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// Verify that the subscript _N is less than the container's size.
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#define __glibcxx_check_subscript(_N) \
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_GLIBCXX_DEBUG_VERIFY(_N < this->size(), \
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_M_message(__gnu_debug::__msg_subscript_oob) \
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._M_sequence(*this, "this") \
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._M_integer(_N, #_N) \
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._M_integer(this->size(), "size"))
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// Verify that the bucket _N is less than the container's buckets count.
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#define __glibcxx_check_bucket_index(_N) \
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_GLIBCXX_DEBUG_VERIFY(_N < this->bucket_count(), \
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_M_message(__gnu_debug::__msg_bucket_index_oob) \
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._M_sequence(*this, "this") \
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._M_integer(_N, #_N) \
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._M_integer(this->bucket_count(), "size"))
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// Verify that the container is nonempty
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#define __glibcxx_check_nonempty() \
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_GLIBCXX_DEBUG_VERIFY(! this->empty(), \
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_M_message(__gnu_debug::__msg_empty) \
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._M_sequence(*this, "this"))
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// Verify that a predicate is irreflexive
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#define __glibcxx_check_irreflexive(_First,_Last) \
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_GLIBCXX_DEBUG_VERIFY(_First == _Last || !(*_First < *_First), \
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_M_message(__gnu_debug::__msg_irreflexive_ordering) \
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._M_iterator_value_type(_First, "< operator type"))
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#if __cplusplus >= 201103L
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# define __glibcxx_check_irreflexive2(_First,_Last) \
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_GLIBCXX_DEBUG_VERIFY(_First == _Last \
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|| __gnu_debug::__is_irreflexive(_First), \
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_M_message(__gnu_debug::__msg_irreflexive_ordering) \
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._M_iterator_value_type(_First, "< operator type"))
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#else
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# define __glibcxx_check_irreflexive2(_First,_Last)
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#endif
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#define __glibcxx_check_irreflexive_pred(_First,_Last,_Pred) \
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_GLIBCXX_DEBUG_VERIFY(_First == _Last || !_Pred(*_First, *_First), \
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_M_message(__gnu_debug::__msg_irreflexive_ordering) \
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._M_instance(_Pred, "functor") \
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._M_iterator_value_type(_First, "ordered type"))
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#if __cplusplus >= 201103L
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# define __glibcxx_check_irreflexive_pred2(_First,_Last,_Pred) \
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_GLIBCXX_DEBUG_VERIFY(_First == _Last \
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||__gnu_debug::__is_irreflexive_pred(_First, _Pred), \
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_M_message(__gnu_debug::__msg_irreflexive_ordering) \
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._M_instance(_Pred, "functor") \
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._M_iterator_value_type(_First, "ordered type"))
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#else
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# define __glibcxx_check_irreflexive_pred2(_First,_Last,_Pred)
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#endif
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// Verify that the iterator range [_First, _Last) is sorted
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#define __glibcxx_check_sorted(_First,_Last) \
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__glibcxx_check_valid_range(_First,_Last); \
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__glibcxx_check_irreflexive(_First,_Last); \
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_GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_sorted( \
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__gnu_debug::__base(_First), \
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__gnu_debug::__base(_Last)), \
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_M_message(__gnu_debug::__msg_unsorted) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last))
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/** Verify that the iterator range [_First, _Last) is sorted by the
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predicate _Pred. */
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#define __glibcxx_check_sorted_pred(_First,_Last,_Pred) \
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__glibcxx_check_valid_range(_First,_Last); \
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__glibcxx_check_irreflexive_pred(_First,_Last,_Pred); \
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_GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_sorted( \
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__gnu_debug::__base(_First), \
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__gnu_debug::__base(_Last), _Pred), \
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_M_message(__gnu_debug::__msg_unsorted_pred) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last) \
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._M_string(#_Pred))
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// Special variant for std::merge, std::includes, std::set_*
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#define __glibcxx_check_sorted_set(_First1,_Last1,_First2) \
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__glibcxx_check_valid_range(_First1,_Last1); \
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_GLIBCXX_DEBUG_VERIFY( \
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__gnu_debug::__check_sorted_set(__gnu_debug::__base(_First1), \
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__gnu_debug::__base(_Last1), _First2),\
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_M_message(__gnu_debug::__msg_unsorted) \
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._M_iterator(_First1, #_First1) \
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._M_iterator(_Last1, #_Last1))
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// Likewise with a _Pred.
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#define __glibcxx_check_sorted_set_pred(_First1,_Last1,_First2,_Pred) \
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__glibcxx_check_valid_range(_First1,_Last1); \
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_GLIBCXX_DEBUG_VERIFY( \
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__gnu_debug::__check_sorted_set(__gnu_debug::__base(_First1), \
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__gnu_debug::__base(_Last1), \
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_First2, _Pred), \
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_M_message(__gnu_debug::__msg_unsorted_pred) \
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._M_iterator(_First1, #_First1) \
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._M_iterator(_Last1, #_Last1) \
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._M_string(#_Pred))
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/** Verify that the iterator range [_First, _Last) is partitioned
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w.r.t. the value _Value. */
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#define __glibcxx_check_partitioned_lower(_First,_Last,_Value) \
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__glibcxx_check_valid_range(_First,_Last); \
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_GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_lower( \
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__gnu_debug::__base(_First), \
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__gnu_debug::__base(_Last), _Value), \
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_M_message(__gnu_debug::__msg_unpartitioned) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last) \
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._M_string(#_Value))
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#define __glibcxx_check_partitioned_upper(_First,_Last,_Value) \
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__glibcxx_check_valid_range(_First,_Last); \
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_GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_upper( \
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__gnu_debug::__base(_First), \
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__gnu_debug::__base(_Last), _Value), \
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_M_message(__gnu_debug::__msg_unpartitioned) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last) \
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._M_string(#_Value))
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/** Verify that the iterator range [_First, _Last) is partitioned
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w.r.t. the value _Value and predicate _Pred. */
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#define __glibcxx_check_partitioned_lower_pred(_First,_Last,_Value,_Pred) \
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__glibcxx_check_valid_range(_First,_Last); \
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_GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_lower( \
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__gnu_debug::__base(_First), \
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__gnu_debug::__base(_Last), _Value, _Pred), \
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_M_message(__gnu_debug::__msg_unpartitioned_pred) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last) \
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._M_string(#_Pred) \
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._M_string(#_Value))
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/** Verify that the iterator range [_First, _Last) is partitioned
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w.r.t. the value _Value and predicate _Pred. */
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#define __glibcxx_check_partitioned_upper_pred(_First,_Last,_Value,_Pred) \
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__glibcxx_check_valid_range(_First,_Last); \
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_GLIBCXX_DEBUG_VERIFY(__gnu_debug::__check_partitioned_upper( \
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__gnu_debug::__base(_First), \
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__gnu_debug::__base(_Last), _Value, _Pred), \
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_M_message(__gnu_debug::__msg_unpartitioned_pred) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last) \
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._M_string(#_Pred) \
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._M_string(#_Value))
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// Verify that the iterator range [_First, _Last) is a heap
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#define __glibcxx_check_heap(_First,_Last) \
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_GLIBCXX_DEBUG_VERIFY(std::__is_heap(__gnu_debug::__base(_First), \
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__gnu_debug::__base(_Last)), \
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_M_message(__gnu_debug::__msg_not_heap) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last))
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/** Verify that the iterator range [_First, _Last) is a heap
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w.r.t. the predicate _Pred. */
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#define __glibcxx_check_heap_pred(_First,_Last,_Pred) \
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_GLIBCXX_DEBUG_VERIFY(std::__is_heap(__gnu_debug::__base(_First), \
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__gnu_debug::__base(_Last), \
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_Pred), \
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_M_message(__gnu_debug::__msg_not_heap_pred) \
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._M_iterator(_First, #_First) \
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._M_iterator(_Last, #_Last) \
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._M_string(#_Pred))
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// Verify that load factor is positive
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#define __glibcxx_check_max_load_factor(_F) \
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_GLIBCXX_DEBUG_VERIFY(_F > 0.0f, \
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_M_message(__gnu_debug::__msg_valid_load_factor) \
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._M_sequence(*this, "this"))
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#define __glibcxx_check_equal_allocs(_This, _Other) \
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_GLIBCXX_DEBUG_VERIFY(_This.get_allocator() == _Other.get_allocator(), \
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_M_message(__gnu_debug::__msg_equal_allocs) \
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._M_sequence(_This, "this"))
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#define __glibcxx_check_string(_String) _GLIBCXX_DEBUG_PEDASSERT(_String != 0)
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#define __glibcxx_check_string_len(_String,_Len) \
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_GLIBCXX_DEBUG_PEDASSERT(_String != 0 || _Len == 0)
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#endif
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