__gnu_debug::_Safe_iterator< _Iterator, _Sequence >(3cxx)

NAME
__gnu_debug::_Safe_iterator< _Iterator, _Sequence > - Safe iterator wrapper.

SYNOPSIS

Inherits _Iterator, and __gnu_debug::_Safe_iterator_base.

  Public Types

typedef _Traits::difference_type difference_type
typedef _Traits::iterator_category iterator_category
typedef _Iterator iterator_type
typedef _Traits::pointer pointer
typedef _Traits::reference reference
typedef _Traits::value_type value_type

  Public Member Functions

_Safe_iterator () noexcept
_Safe_iterator (const _Iterator &__i, const _Safe_sequence_base *__seq) noexcept
Safe iterator construction from an unsafe iterator and its sequence.
_Safe_iterator (const _Safe_iterator &__x) noexcept
Copy construction.
_Safe_iterator (_Safe_iterator &&__x) noexcept
Move construction.
template<typename _MutableIterator > _Safe_iterator (const _Safe_iterator< _MutableIterator, typename __gnu_cxx::__enable_if<(std::__are_same< _MutableIterator, typename _Sequence::iterator::iterator_type >::__value), _Sequence >::__type > &__x) noexcept
Converting constructor from a mutable iterator to a constant iterator.
void _M_attach (_Safe_sequence_base *__seq)
void _M_attach_single (_Safe_sequence_base *__seq)
bool _M_attached_to (const _Safe_sequence_base *__seq) const
bool _M_before_dereferenceable () const
Is the iterator before a dereferenceable one?
bool _M_can_advance (const difference_type &__n) const
bool _M_can_compare (const _Safe_iterator_base &__x) const throw ()
bool _M_decrementable () const
bool _M_dereferenceable () const
Is the iterator dereferenceable?
void _M_detach_single () throw ()
__gnu_cxx::__conditional_type< std::__are_same< _Const_iterator, _Safe_iterator >::__value, const _Sequence *, _Sequence * >::__type _M_get_sequence () const
bool _M_incrementable () const
Is the iterator incrementable?
void _M_invalidate ()
bool _M_is_before_begin () const
Is this iterator equal to the sequence's before_begin() iterator if any?
bool _M_is_begin () const
Is this iterator equal to the sequence's begin() iterator?
bool _M_is_beginnest () const
Is this iterator equal to the sequence's before_begin() iterator if any or begin() otherwise?
bool _M_is_end () const
Is this iterator equal to the sequence's end() iterator?
void _M_reset () throw ()
bool _M_singular () const throw ()
void _M_unlink () throw ()
bool _M_valid_range (const _Safe_iterator &__rhs, std::pair< difference_type, _Distance_precision > &__dist, bool __check_dereferenceable=true) const
_Iterator & base () noexcept
Return the underlying iterator.
const _Iterator & base () const noexcept
operator _Iterator () const noexcept
Conversion to underlying non-debug iterator to allow better interaction with non-debug containers.
reference operator* () const noexcept
Iterator dereference.
_Safe_iterator operator+ (const difference_type &__n) const noexcept
_Safe_iterator & operator++ () noexcept
Iterator preincrement.
_Safe_iterator operator++ (int) noexcept
Iterator postincrement.
_Safe_iterator & operator+= (const difference_type &__n) noexcept
_Safe_iterator operator- (const difference_type &__n) const noexcept
_Safe_iterator & operator-- () noexcept
Iterator predecrement.
_Safe_iterator operator-- (int) noexcept
Iterator postdecrement.
_Safe_iterator & operator-= (const difference_type &__n) noexcept
pointer operator-> () const noexcept
Iterator dereference.
_Safe_iterator & operator= (const _Safe_iterator &__x) noexcept
Copy assignment.
_Safe_iterator & operator= (_Safe_iterator &&__x) noexcept
Move assignment.
reference operator[] (const difference_type &__n) const noexcept

  Public Attributes

_Safe_iterator_base * _M_next
_Safe_iterator_base * _M_prior
_Safe_sequence_base * _M_sequence
unsigned int _M_version

  Protected Member Functions

void _M_attach (_Safe_sequence_base *__seq, bool __constant)
void _M_attach_single (_Safe_sequence_base *__seq, bool __constant) throw ()
void _M_detach ()
__gnu_cxx::__mutex & _M_get_mutex () throw ()

Detailed Description

  template<typename _Iterator, typename _Sequence>
class __gnu_debug::_Safe_iterator< _Iterator, _Sequence >" Safe iterator wrapper.

The class template _Safe_iterator is a wrapper around an iterator that tracks the iterator's movement among sequences and checks that operations performed on the 'safe' iterator are legal. In additional to the basic iterator operations (which are validated, and then passed to the underlying iterator), _Safe_iterator has member functions for iterator invalidation, attaching/detaching the iterator from sequences, and querying the iterator's state.

Note that _Iterator must be the first base class so that it gets initialized before the iterator is being attached to the container's list of iterators and it is being detached before _Iterator get destroyed. Otherwise it would result in a data race.

Definition at line 56 of file formatter.h.

Constructor & Destructor Documentation

  template<typename _Iterator, typename _Sequence> __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_Safe_iterator () [inline], [noexcept]

Postcondition:
    the iterator is singular and unattached

Definition at line 119 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_Safe_iterator (const _Iterator & __i, const _Safe_sequence_base * __seq) [inline], [noexcept]

Safe iterator construction from an unsafe iterator and its sequence.

Precondition:
    seq is not NULL

Postcondition:
    this is not singular

Definition at line 128 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_Safe_iterator (const _Safe_iterator< _Iterator, _Sequence > & __x) [inline], [noexcept]

Copy construction.

Definition at line 140 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_Safe_iterator (_Safe_iterator< _Iterator, _Sequence > && __x) [inline], [noexcept]

Move construction.

Postcondition:
    __x is singular and unattached

Definition at line 158 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> template<typename _MutableIterator > __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_Safe_iterator (const _Safe_iterator< _MutableIterator, typename __gnu_cxx::__enable_if<(std::__are_same< _MutableIterator, typename _Sequence::iterator::iterator_type >::__value), _Sequence >::__type > & __x) [inline], [noexcept]

Converting constructor from a mutable iterator to a constant iterator.

Definition at line 178 of file safe_iterator.h.

Member Function Documentation

  void __gnu_debug::_Safe_iterator_base::_M_attach (_Safe_sequence_base * __seq, bool __constant) [protected], [inherited]
Attaches this iterator to the given sequence, detaching it from whatever sequence it was attached to originally. If the new sequence is the NULL pointer, the iterator is left unattached.

Referenced by __gnu_debug::_Safe_sequence_base::_M_invalidate_all(), and __gnu_debug::_Safe_iterator_base::_Safe_iterator_base().

  template<typename _Iterator, typename _Sequence> void __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_M_attach (_Safe_sequence_base * __seq) [inline]
Attach iterator to the given sequence.

Definition at line 416 of file safe_iterator.h.

  void __gnu_debug::_Safe_iterator_base::_M_attach_single (_Safe_sequence_base * __seq, bool __constant) [protected], [inherited]
Likewise, but not thread-safe.

Referenced by __gnu_debug::_Safe_sequence_base::_M_invalidate_all(), and __gnu_debug::_Safe_iterator_base::_Safe_iterator_base().

  template<typename _Iterator, typename _Sequence> void __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_M_attach_single (_Safe_sequence_base * __seq) [inline]
Likewise, but not thread-safe.

Definition at line 421 of file safe_iterator.h.

  bool __gnu_debug::_Safe_iterator_base::_M_attached_to (const _Safe_sequence_base * __seq) const [inline], [inherited]
Determines if we are attached to the given sequence.

Definition at line 131 of file safe_base.h.

References __gnu_debug::_Safe_iterator_base::_M_can_compare(), and __gnu_debug::_Safe_iterator_base::_M_singular().

  template<typename _Iterator, typename _Sequence> bool __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_M_before_dereferenceable () const [inline]

Is the iterator before a dereferenceable one?

Definition at line 431 of file safe_iterator.h.

  bool __gnu_debug::_Safe_iterator_base::_M_can_compare (const _Safe_iterator_base & __x) const [inherited]
Can we compare this iterator to the given iterator __x? Returns true if both iterators are nonsingular and reference the same sequence.

Referenced by __gnu_debug::_Safe_iterator_base::_M_attached_to().

  template<typename _Iterator, typename _Sequence> bool __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_M_dereferenceable () const [inline]

Is the iterator dereferenceable?

Definition at line 426 of file safe_iterator.h.

Referenced by __gnu_debug::__check_dereferenceable().

  void __gnu_debug::_Safe_iterator_base::_M_detach () [protected], [inherited]
Detach the iterator for whatever sequence it is attached to, if any.

Referenced by __gnu_debug::_Safe_sequence_base::_M_invalidate_all(), and __gnu_debug::_Safe_iterator_base::_Safe_iterator_base().

  void __gnu_debug::_Safe_iterator_base::_M_detach_single () [inherited]
Likewise, but not thread-safe.

Referenced by __gnu_debug::_Safe_sequence_base::_M_invalidate_all(), __gnu_debug::_Safe_sequence< map< _Key, _Tp, _Compare, _Allocator > >::_M_transfer_from_if(), and __gnu_debug::_Safe_iterator_base::_Safe_iterator_base().

  __gnu_cxx::__mutex& __gnu_debug::_Safe_iterator_base::_M_get_mutex () [protected], [inherited]
For use in _Safe_iterator.

Referenced by __gnu_debug::_Safe_iterator_base::_Safe_iterator_base(), and __gnu_debug::_Safe_sequence_base::~_Safe_sequence_base().

  template<typename _Iterator, typename _Sequence> bool __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_M_incrementable () const [inline]

Is the iterator incrementable?

Definition at line 443 of file safe_iterator.h.

References __gnu_debug::__check_dereferenceable().

  void __gnu_debug::_Safe_iterator_base::_M_invalidate () [inline], [inherited]
Invalidate the iterator, making it singular.

Definition at line 146 of file safe_base.h.

References __gnu_debug::_Safe_iterator_base::_M_reset().

  template<typename _Iterator, typename _Sequence> bool __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_M_is_before_begin () const [inline]

Is this iterator equal to the sequence's before_begin() iterator if any?

Definition at line 482 of file safe_iterator.h.

Referenced by __gnu_debug::__get_distance().

  template<typename _Iterator, typename _Sequence> bool __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_M_is_begin () const [inline]

Is this iterator equal to the sequence's begin() iterator?

Definition at line 471 of file safe_iterator.h.

Referenced by __gnu_debug::__get_distance().

  template<typename _Iterator, typename _Sequence> bool __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_M_is_beginnest () const [inline]

Is this iterator equal to the sequence's before_begin() iterator if any or begin() otherwise?

Definition at line 488 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> bool __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::_M_is_end () const [inline]

Is this iterator equal to the sequence's end() iterator?

Definition at line 476 of file safe_iterator.h.

Referenced by __gnu_debug::__get_distance().

  void __gnu_debug::_Safe_iterator_base::_M_reset () [inherited]
Reset all member variables

Referenced by __gnu_debug::_Safe_iterator_base::_M_invalidate().

  bool __gnu_debug::_Safe_iterator_base::_M_singular () const [inherited]
Is this iterator singular?

Referenced by __gnu_debug::__check_singular_aux(), __gnu_debug::_Safe_iterator_base::_M_attached_to(), __gnu_debug::_Safe_local_iterator< _Iterator, _Sequence >::_M_dereferenceable(), and __gnu_debug::_Safe_local_iterator< _Iterator, _Sequence >::_M_incrementable().

  void __gnu_debug::_Safe_iterator_base::_M_unlink () [inline], [inherited]
Unlink itself

Definition at line 155 of file safe_base.h.

  template<typename _Iterator, typename _Sequence> _Iterator& __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::base () [inline], [noexcept]

Return the underlying iterator.

Definition at line 403 of file safe_iterator.h.

Referenced by __gnu_debug::__get_distance().

  template<typename _Iterator, typename _Sequence> __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::operator _Iterator () const [inline], [noexcept]

Conversion to underlying non-debug iterator to allow better interaction with non-debug containers.

Definition at line 412 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> reference __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::operator* () const [inline], [noexcept]

Iterator dereference.

Precondition:
    iterator is dereferenceable

Definition at line 266 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> _Safe_iterator& __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::operator++ () [inline], [noexcept]

Iterator preincrement.

Precondition:
    iterator is incrementable

Definition at line 293 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> _Safe_iterator __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::operator++ (int) [inline], [noexcept]

Iterator postincrement.

Precondition:
    iterator is incrementable

Definition at line 308 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> _Safe_iterator& __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::operator-- () [inline], [noexcept]

Iterator predecrement.

Precondition:
    iterator is decrementable

Definition at line 323 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> _Safe_iterator __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::operator-- (int) [inline], [noexcept]

Iterator postdecrement.

Precondition:
    iterator is decrementable

Definition at line 338 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> pointer __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::operator-> () const [inline], [noexcept]

Iterator dereference.

Precondition:
    iterator is dereferenceable

Definition at line 279 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> _Safe_iterator& __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::operator= (const _Safe_iterator< _Iterator, _Sequence > & __x) [inline], [noexcept]

Copy assignment.

Definition at line 199 of file safe_iterator.h.

  template<typename _Iterator, typename _Sequence> _Safe_iterator& __gnu_debug::_Safe_iterator< _Iterator, _Sequence >::operator= (_Safe_iterator< _Iterator, _Sequence > && __x) [inline], [noexcept]

Move assignment.

Postcondition:
    __x is singular and unattached

Definition at line 231 of file safe_iterator.h.

Member Data Documentation

  _Safe_iterator_base* __gnu_debug::_Safe_iterator_base::_M_next [inherited]
Pointer to the next iterator in the sequence's list of iterators. Only valid when _M_sequence != NULL.

Definition at line 74 of file safe_base.h.

Referenced by __gnu_debug::_Safe_sequence< map< _Key, _Tp, _Compare, _Allocator > >::_M_transfer_from_if().

  _Safe_iterator_base* __gnu_debug::_Safe_iterator_base::_M_prior [inherited]
Pointer to the previous iterator in the sequence's list of iterators. Only valid when _M_sequence != NULL.

Definition at line 70 of file safe_base.h.

Referenced by __gnu_debug::_Safe_sequence< map< _Key, _Tp, _Compare, _Allocator > >::_M_transfer_from_if().

  _Safe_sequence_base* __gnu_debug::_Safe_iterator_base::_M_sequence [inherited]
The sequence this iterator references; may be NULL to indicate a singular iterator.

Definition at line 57 of file safe_base.h.

Referenced by __gnu_debug::_Safe_local_iterator< _Iterator, _Sequence >::_M_incrementable(), __gnu_debug::_Safe_sequence< map< _Key, _Tp, _Compare, _Allocator > >::_M_transfer_from_if(), __gnu_debug::_Safe_iterator_base::_Safe_iterator_base(), and __gnu_debug::_Safe_local_iterator_base::_Safe_local_iterator_base().

  unsigned int __gnu_debug::_Safe_iterator_base::_M_version [inherited]
The version number of this iterator. The sentinel value 0 is used to indicate an invalidated iterator (i.e., one that is singular because of an operation on the container). This version number must equal the version number in the sequence referenced by _M_sequence for the iterator to be non-singular.

Definition at line 66 of file safe_base.h.

Referenced by __gnu_debug::_Safe_sequence< map< _Key, _Tp, _Compare, _Allocator > >::_M_transfer_from_if().

Author

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