32bb816a91
2013-08-30 François Dumont <fdumont@gcc.gnu.org> PR libstdc++/58148 * include/debug/functions.h (__foreign_iterator_aux4): Use sequence const_pointer as common type to compare pointers. Add a fallback overload in case pointers cannot be cast to sequence const_pointer. * testsuite/23_containers/vector/modifiers/insert/58148.cc: New. From-SVN: r202121
559 lines
19 KiB
C++
559 lines
19 KiB
C++
// Debugging support implementation -*- C++ -*-
|
|
|
|
// Copyright (C) 2003-2013 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/functions.h
|
|
* This file is a GNU debug extension to the Standard C++ Library.
|
|
*/
|
|
|
|
#ifndef _GLIBCXX_DEBUG_FUNCTIONS_H
|
|
#define _GLIBCXX_DEBUG_FUNCTIONS_H 1
|
|
|
|
#include <bits/c++config.h>
|
|
#include <bits/stl_iterator_base_types.h> // for iterator_traits, categories and
|
|
// _Iter_base
|
|
#include <bits/cpp_type_traits.h> // for __is_integer
|
|
#include <bits/move.h> // for __addressof and addressof
|
|
#if __cplusplus >= 201103L
|
|
# include <bits/stl_function.h> // for less and greater_equal
|
|
# include <type_traits> // for is_lvalue_reference and __and_
|
|
#endif
|
|
#include <debug/formatter.h>
|
|
|
|
namespace __gnu_debug
|
|
{
|
|
template<typename _Iterator, typename _Sequence>
|
|
class _Safe_iterator;
|
|
|
|
template<typename _Sequence>
|
|
struct _Insert_range_from_self_is_safe
|
|
{ enum { __value = 0 }; };
|
|
|
|
// An arbitrary iterator pointer is not singular.
|
|
inline bool
|
|
__check_singular_aux(const void*) { return false; }
|
|
|
|
// We may have an iterator that derives from _Safe_iterator_base but isn't
|
|
// a _Safe_iterator.
|
|
template<typename _Iterator>
|
|
inline bool
|
|
__check_singular(_Iterator& __x)
|
|
{ return __check_singular_aux(&__x); }
|
|
|
|
/** Non-NULL pointers are nonsingular. */
|
|
template<typename _Tp>
|
|
inline bool
|
|
__check_singular(const _Tp* __ptr)
|
|
{ return __ptr == 0; }
|
|
|
|
/** Safe iterators know if they are singular. */
|
|
template<typename _Iterator, typename _Sequence>
|
|
inline bool
|
|
__check_singular(const _Safe_iterator<_Iterator, _Sequence>& __x)
|
|
{ return __x._M_singular(); }
|
|
|
|
/** Assume that some arbitrary iterator is dereferenceable, because we
|
|
can't prove that it isn't. */
|
|
template<typename _Iterator>
|
|
inline bool
|
|
__check_dereferenceable(_Iterator&)
|
|
{ return true; }
|
|
|
|
/** Non-NULL pointers are dereferenceable. */
|
|
template<typename _Tp>
|
|
inline bool
|
|
__check_dereferenceable(const _Tp* __ptr)
|
|
{ return __ptr; }
|
|
|
|
/** Safe iterators know if they are singular. */
|
|
template<typename _Iterator, typename _Sequence>
|
|
inline bool
|
|
__check_dereferenceable(const _Safe_iterator<_Iterator, _Sequence>& __x)
|
|
{ return __x._M_dereferenceable(); }
|
|
|
|
/** If the distance between two random access iterators is
|
|
* nonnegative, assume the range is valid.
|
|
*/
|
|
template<typename _RandomAccessIterator>
|
|
inline bool
|
|
__valid_range_aux2(const _RandomAccessIterator& __first,
|
|
const _RandomAccessIterator& __last,
|
|
std::random_access_iterator_tag)
|
|
{ return __last - __first >= 0; }
|
|
|
|
/** Can't test for a valid range with input iterators, because
|
|
* iteration may be destructive. So we just assume that the range
|
|
* is valid.
|
|
*/
|
|
template<typename _InputIterator>
|
|
inline bool
|
|
__valid_range_aux2(const _InputIterator&, const _InputIterator&,
|
|
std::input_iterator_tag)
|
|
{ return true; }
|
|
|
|
/** We say that integral types for a valid range, and defer to other
|
|
* routines to realize what to do with integral types instead of
|
|
* iterators.
|
|
*/
|
|
template<typename _Integral>
|
|
inline bool
|
|
__valid_range_aux(const _Integral&, const _Integral&, std::__true_type)
|
|
{ return true; }
|
|
|
|
/** We have iterators, so figure out what kind of iterators that are
|
|
* to see if we can check the range ahead of time.
|
|
*/
|
|
template<typename _InputIterator>
|
|
inline bool
|
|
__valid_range_aux(const _InputIterator& __first,
|
|
const _InputIterator& __last, std::__false_type)
|
|
{ return __valid_range_aux2(__first, __last,
|
|
std::__iterator_category(__first)); }
|
|
|
|
/** Don't know what these iterators are, or if they are even
|
|
* iterators (we may get an integral type for InputIterator), so
|
|
* see if they are integral and pass them on to the next phase
|
|
* otherwise.
|
|
*/
|
|
template<typename _InputIterator>
|
|
inline bool
|
|
__valid_range(const _InputIterator& __first, const _InputIterator& __last)
|
|
{
|
|
typedef typename std::__is_integer<_InputIterator>::__type _Integral;
|
|
return __valid_range_aux(__first, __last, _Integral());
|
|
}
|
|
|
|
/** Safe iterators know how to check if they form a valid range. */
|
|
template<typename _Iterator, typename _Sequence>
|
|
inline bool
|
|
__valid_range(const _Safe_iterator<_Iterator, _Sequence>& __first,
|
|
const _Safe_iterator<_Iterator, _Sequence>& __last)
|
|
{ return __first._M_valid_range(__last); }
|
|
|
|
/** Safe local iterators know how to check if they form a valid range. */
|
|
template<typename _Iterator, typename _Sequence>
|
|
inline bool
|
|
__valid_range(const _Safe_local_iterator<_Iterator, _Sequence>& __first,
|
|
const _Safe_local_iterator<_Iterator, _Sequence>& __last)
|
|
{ return __first._M_valid_range(__last); }
|
|
|
|
/* Checks that [first, last) is a valid range, and then returns
|
|
* __first. This routine is useful when we can't use a separate
|
|
* assertion statement because, e.g., we are in a constructor.
|
|
*/
|
|
template<typename _InputIterator>
|
|
inline _InputIterator
|
|
__check_valid_range(const _InputIterator& __first,
|
|
const _InputIterator& __last
|
|
__attribute__((__unused__)))
|
|
{
|
|
__glibcxx_check_valid_range(__first, __last);
|
|
return __first;
|
|
}
|
|
|
|
#if __cplusplus >= 201103L
|
|
// Default implementation.
|
|
template<typename _Iterator, typename _Sequence>
|
|
inline bool
|
|
__foreign_iterator_aux4(const _Safe_iterator<_Iterator, _Sequence>& __it,
|
|
typename _Sequence::const_pointer __begin,
|
|
typename _Sequence::const_pointer __other)
|
|
{
|
|
typedef typename _Sequence::const_pointer _PointerType;
|
|
constexpr std::less<_PointerType> __l{};
|
|
|
|
return (__l(__other, __begin)
|
|
|| __l(std::addressof(*(__it._M_get_sequence()->_M_base().end()
|
|
- 1)), __other));
|
|
}
|
|
|
|
// Fallback when address type cannot be implicitely casted to sequence
|
|
// const_pointer.
|
|
template<typename _Iterator, typename _Sequence,
|
|
typename _InputIterator>
|
|
inline bool
|
|
__foreign_iterator_aux4(const _Safe_iterator<_Iterator, _Sequence>&,
|
|
_InputIterator, ...)
|
|
{ return true; }
|
|
|
|
template<typename _Iterator, typename _Sequence, typename _InputIterator>
|
|
inline bool
|
|
__foreign_iterator_aux3(const _Safe_iterator<_Iterator, _Sequence>& __it,
|
|
_InputIterator __other,
|
|
std::true_type)
|
|
{
|
|
// Only containers with all elements in contiguous memory can have their
|
|
// elements passed through pointers.
|
|
// Arithmetics is here just to make sure we are not dereferencing
|
|
// past-the-end iterator.
|
|
if (__it._M_get_sequence()->_M_base().begin()
|
|
!= __it._M_get_sequence()->_M_base().end())
|
|
if (std::addressof(*(__it._M_get_sequence()->_M_base().end() - 1))
|
|
- std::addressof(*(__it._M_get_sequence()->_M_base().begin()))
|
|
== __it._M_get_sequence()->size() - 1)
|
|
return (__foreign_iterator_aux4
|
|
(__it,
|
|
std::addressof(*(__it._M_get_sequence()->_M_base().begin())),
|
|
std::addressof(*__other)));
|
|
return true;
|
|
}
|
|
|
|
/* Fallback overload for which we can't say, assume it is valid. */
|
|
template<typename _Iterator, typename _Sequence, typename _InputIterator>
|
|
inline bool
|
|
__foreign_iterator_aux3(const _Safe_iterator<_Iterator, _Sequence>& __it,
|
|
_InputIterator __other,
|
|
std::false_type)
|
|
{ return true; }
|
|
#endif
|
|
|
|
/** Checks that iterators do not belong to the same sequence. */
|
|
template<typename _Iterator, typename _Sequence, typename _OtherIterator>
|
|
inline bool
|
|
__foreign_iterator_aux2(const _Safe_iterator<_Iterator, _Sequence>& __it,
|
|
const _Safe_iterator<_OtherIterator, _Sequence>& __other,
|
|
std::input_iterator_tag)
|
|
{ return __it._M_get_sequence() != __other._M_get_sequence(); }
|
|
|
|
#if __cplusplus >= 201103L
|
|
/* This overload detects when passing pointers to the contained elements
|
|
rather than using iterators.
|
|
*/
|
|
template<typename _Iterator, typename _Sequence, typename _InputIterator>
|
|
inline bool
|
|
__foreign_iterator_aux2(const _Safe_iterator<_Iterator, _Sequence>& __it,
|
|
_InputIterator __other,
|
|
std::random_access_iterator_tag)
|
|
{
|
|
typedef typename _Sequence::const_iterator _ItType;
|
|
typedef typename std::iterator_traits<_ItType>::reference _Ref;
|
|
return __foreign_iterator_aux3(__it, __other,
|
|
std::is_lvalue_reference<_Ref>());
|
|
}
|
|
#endif
|
|
|
|
/* Fallback overload for which we can't say, assume it is valid. */
|
|
template<typename _Iterator, typename _Sequence, typename _InputIterator>
|
|
inline bool
|
|
__foreign_iterator_aux2(const _Safe_iterator<_Iterator, _Sequence>&,
|
|
_InputIterator,
|
|
std::input_iterator_tag)
|
|
{ return true; }
|
|
|
|
template<typename _Iterator, typename _Sequence,
|
|
typename _Integral>
|
|
inline bool
|
|
__foreign_iterator_aux(const _Safe_iterator<_Iterator, _Sequence>& __it,
|
|
_Integral __other,
|
|
std::__true_type)
|
|
{ return true; }
|
|
|
|
template<typename _Iterator, typename _Sequence,
|
|
typename _InputIterator>
|
|
inline bool
|
|
__foreign_iterator_aux(const _Safe_iterator<_Iterator, _Sequence>& __it,
|
|
_InputIterator __other,
|
|
std::__false_type)
|
|
{
|
|
return (_Insert_range_from_self_is_safe<_Sequence>::__value
|
|
|| __foreign_iterator_aux2(__it, __other,
|
|
std::__iterator_category(__it)));
|
|
}
|
|
|
|
template<typename _Iterator, typename _Sequence,
|
|
typename _InputIterator>
|
|
inline bool
|
|
__foreign_iterator(const _Safe_iterator<_Iterator, _Sequence>& __it,
|
|
_InputIterator __other)
|
|
{
|
|
typedef typename std::__is_integer<_InputIterator>::__type _Integral;
|
|
return __foreign_iterator_aux(__it, __other, _Integral());
|
|
}
|
|
|
|
/** Checks that __s is non-NULL or __n == 0, and then returns __s. */
|
|
template<typename _CharT, typename _Integer>
|
|
inline const _CharT*
|
|
__check_string(const _CharT* __s,
|
|
const _Integer& __n __attribute__((__unused__)))
|
|
{
|
|
#ifdef _GLIBCXX_DEBUG_PEDANTIC
|
|
__glibcxx_assert(__s != 0 || __n == 0);
|
|
#endif
|
|
return __s;
|
|
}
|
|
|
|
/** Checks that __s is non-NULL and then returns __s. */
|
|
template<typename _CharT>
|
|
inline const _CharT*
|
|
__check_string(const _CharT* __s)
|
|
{
|
|
#ifdef _GLIBCXX_DEBUG_PEDANTIC
|
|
__glibcxx_assert(__s != 0);
|
|
#endif
|
|
return __s;
|
|
}
|
|
|
|
// Can't check if an input iterator sequence is sorted, because we
|
|
// can't step through the sequence.
|
|
template<typename _InputIterator>
|
|
inline bool
|
|
__check_sorted_aux(const _InputIterator&, const _InputIterator&,
|
|
std::input_iterator_tag)
|
|
{ return true; }
|
|
|
|
// Can verify if a forward iterator sequence is in fact sorted using
|
|
// std::__is_sorted
|
|
template<typename _ForwardIterator>
|
|
inline bool
|
|
__check_sorted_aux(_ForwardIterator __first, _ForwardIterator __last,
|
|
std::forward_iterator_tag)
|
|
{
|
|
if (__first == __last)
|
|
return true;
|
|
|
|
_ForwardIterator __next = __first;
|
|
for (++__next; __next != __last; __first = __next, ++__next)
|
|
if (*__next < *__first)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
// Can't check if an input iterator sequence is sorted, because we can't step
|
|
// through the sequence.
|
|
template<typename _InputIterator, typename _Predicate>
|
|
inline bool
|
|
__check_sorted_aux(const _InputIterator&, const _InputIterator&,
|
|
_Predicate, std::input_iterator_tag)
|
|
{ return true; }
|
|
|
|
// Can verify if a forward iterator sequence is in fact sorted using
|
|
// std::__is_sorted
|
|
template<typename _ForwardIterator, typename _Predicate>
|
|
inline bool
|
|
__check_sorted_aux(_ForwardIterator __first, _ForwardIterator __last,
|
|
_Predicate __pred, std::forward_iterator_tag)
|
|
{
|
|
if (__first == __last)
|
|
return true;
|
|
|
|
_ForwardIterator __next = __first;
|
|
for (++__next; __next != __last; __first = __next, ++__next)
|
|
if (__pred(*__next, *__first))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
// Determine if a sequence is sorted.
|
|
template<typename _InputIterator>
|
|
inline bool
|
|
__check_sorted(const _InputIterator& __first, const _InputIterator& __last)
|
|
{
|
|
// Verify that the < operator for elements in the sequence is a
|
|
// StrictWeakOrdering by checking that it is irreflexive.
|
|
__glibcxx_assert(__first == __last || !(*__first < *__first));
|
|
|
|
return __check_sorted_aux(__first, __last,
|
|
std::__iterator_category(__first));
|
|
}
|
|
|
|
template<typename _InputIterator, typename _Predicate>
|
|
inline bool
|
|
__check_sorted(const _InputIterator& __first, const _InputIterator& __last,
|
|
_Predicate __pred)
|
|
{
|
|
// Verify that the predicate is StrictWeakOrdering by checking that it
|
|
// is irreflexive.
|
|
__glibcxx_assert(__first == __last || !__pred(*__first, *__first));
|
|
|
|
return __check_sorted_aux(__first, __last, __pred,
|
|
std::__iterator_category(__first));
|
|
}
|
|
|
|
template<typename _InputIterator>
|
|
inline bool
|
|
__check_sorted_set_aux(const _InputIterator& __first,
|
|
const _InputIterator& __last,
|
|
std::__true_type)
|
|
{ return __check_sorted(__first, __last); }
|
|
|
|
template<typename _InputIterator>
|
|
inline bool
|
|
__check_sorted_set_aux(const _InputIterator&,
|
|
const _InputIterator&,
|
|
std::__false_type)
|
|
{ return true; }
|
|
|
|
template<typename _InputIterator, typename _Predicate>
|
|
inline bool
|
|
__check_sorted_set_aux(const _InputIterator& __first,
|
|
const _InputIterator& __last,
|
|
_Predicate __pred, std::__true_type)
|
|
{ return __check_sorted(__first, __last, __pred); }
|
|
|
|
template<typename _InputIterator, typename _Predicate>
|
|
inline bool
|
|
__check_sorted_set_aux(const _InputIterator&,
|
|
const _InputIterator&, _Predicate,
|
|
std::__false_type)
|
|
{ return true; }
|
|
|
|
// ... special variant used in std::merge, std::includes, std::set_*.
|
|
template<typename _InputIterator1, typename _InputIterator2>
|
|
inline bool
|
|
__check_sorted_set(const _InputIterator1& __first,
|
|
const _InputIterator1& __last,
|
|
const _InputIterator2&)
|
|
{
|
|
typedef typename std::iterator_traits<_InputIterator1>::value_type
|
|
_ValueType1;
|
|
typedef typename std::iterator_traits<_InputIterator2>::value_type
|
|
_ValueType2;
|
|
|
|
typedef typename std::__are_same<_ValueType1, _ValueType2>::__type
|
|
_SameType;
|
|
return __check_sorted_set_aux(__first, __last, _SameType());
|
|
}
|
|
|
|
template<typename _InputIterator1, typename _InputIterator2,
|
|
typename _Predicate>
|
|
inline bool
|
|
__check_sorted_set(const _InputIterator1& __first,
|
|
const _InputIterator1& __last,
|
|
const _InputIterator2&, _Predicate __pred)
|
|
{
|
|
typedef typename std::iterator_traits<_InputIterator1>::value_type
|
|
_ValueType1;
|
|
typedef typename std::iterator_traits<_InputIterator2>::value_type
|
|
_ValueType2;
|
|
|
|
typedef typename std::__are_same<_ValueType1, _ValueType2>::__type
|
|
_SameType;
|
|
return __check_sorted_set_aux(__first, __last, __pred, _SameType());
|
|
}
|
|
|
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS
|
|
// 270. Binary search requirements overly strict
|
|
// Determine if a sequence is partitioned w.r.t. this element.
|
|
template<typename _ForwardIterator, typename _Tp>
|
|
inline bool
|
|
__check_partitioned_lower(_ForwardIterator __first,
|
|
_ForwardIterator __last, const _Tp& __value)
|
|
{
|
|
while (__first != __last && *__first < __value)
|
|
++__first;
|
|
if (__first != __last)
|
|
{
|
|
++__first;
|
|
while (__first != __last && !(*__first < __value))
|
|
++__first;
|
|
}
|
|
return __first == __last;
|
|
}
|
|
|
|
template<typename _ForwardIterator, typename _Tp>
|
|
inline bool
|
|
__check_partitioned_upper(_ForwardIterator __first,
|
|
_ForwardIterator __last, const _Tp& __value)
|
|
{
|
|
while (__first != __last && !(__value < *__first))
|
|
++__first;
|
|
if (__first != __last)
|
|
{
|
|
++__first;
|
|
while (__first != __last && __value < *__first)
|
|
++__first;
|
|
}
|
|
return __first == __last;
|
|
}
|
|
|
|
// Determine if a sequence is partitioned w.r.t. this element.
|
|
template<typename _ForwardIterator, typename _Tp, typename _Pred>
|
|
inline bool
|
|
__check_partitioned_lower(_ForwardIterator __first,
|
|
_ForwardIterator __last, const _Tp& __value,
|
|
_Pred __pred)
|
|
{
|
|
while (__first != __last && bool(__pred(*__first, __value)))
|
|
++__first;
|
|
if (__first != __last)
|
|
{
|
|
++__first;
|
|
while (__first != __last && !bool(__pred(*__first, __value)))
|
|
++__first;
|
|
}
|
|
return __first == __last;
|
|
}
|
|
|
|
template<typename _ForwardIterator, typename _Tp, typename _Pred>
|
|
inline bool
|
|
__check_partitioned_upper(_ForwardIterator __first,
|
|
_ForwardIterator __last, const _Tp& __value,
|
|
_Pred __pred)
|
|
{
|
|
while (__first != __last && !bool(__pred(__value, *__first)))
|
|
++__first;
|
|
if (__first != __last)
|
|
{
|
|
++__first;
|
|
while (__first != __last && bool(__pred(__value, *__first)))
|
|
++__first;
|
|
}
|
|
return __first == __last;
|
|
}
|
|
|
|
// Helper struct to detect random access safe iterators.
|
|
template<typename _Iterator>
|
|
struct __is_safe_random_iterator
|
|
{
|
|
enum { __value = 0 };
|
|
typedef std::__false_type __type;
|
|
};
|
|
|
|
template<typename _Iterator, typename _Sequence>
|
|
struct __is_safe_random_iterator<_Safe_iterator<_Iterator, _Sequence> >
|
|
: std::__are_same<std::random_access_iterator_tag,
|
|
typename std::iterator_traits<_Iterator>::
|
|
iterator_category>
|
|
{ };
|
|
|
|
template<typename _Iterator>
|
|
struct _Siter_base
|
|
: std::_Iter_base<_Iterator, __is_safe_random_iterator<_Iterator>::__value>
|
|
{ };
|
|
|
|
/** Helper function to extract base iterator of random access safe iterator
|
|
in order to reduce performance impact of debug mode. Limited to random
|
|
access iterator because it is the only category for which it is possible
|
|
to check for correct iterators order in the __valid_range function
|
|
thanks to the < operator.
|
|
*/
|
|
template<typename _Iterator>
|
|
inline typename _Siter_base<_Iterator>::iterator_type
|
|
__base(_Iterator __it)
|
|
{ return _Siter_base<_Iterator>::_S_base(__it); }
|
|
} // namespace __gnu_debug
|
|
|
|
#endif
|