std::insert_iterator< _Container >(3cxx)

NAME
std::insert_iterator< _Container > - Turns assignment into insertion.

SYNOPSIS

Inherits std::iterator< output_iterator_tag, void, void, void, void >.

  Public Types

typedef _Container container_type
A nested typedef for the type of whatever container you used.
typedef void difference_type
Distance between iterators is represented as this type.
typedef output_iterator_tag iterator_category
One of the tag types.
typedef void pointer
This type represents a pointer-to-value_type.
typedef void reference
This type represents a reference-to-value_type.
typedef void value_type
The type 'pointed to' by the iterator.

  Public Member Functions

constexpr insert_iterator (_Container &__x, _Iter __i)
constexpr insert_iterator & operator* ()
Simply returns *this.
constexpr insert_iterator & operator++ ()
Simply returns *this. (This iterator does not move.)
constexpr insert_iterator & operator++ (int)
Simply returns *this. (This iterator does not move.)
constexpr insert_iterator & operator= (const typename _Container::value_type &__value)
constexpr insert_iterator & operator= (typename _Container::value_type &&__value)

  Protected Attributes

_Container * container
_Iter iter

Detailed Description

  template<typename _Container>
class std::insert_iterator< _Container >" Turns assignment into insertion.

These are output iterators, constructed from a container-of-T. Assigning a T to the iterator inserts it in the container at the iterator's position, rather than overwriting the value at that position.

(Sequences will actually insert a copy of the value before the iterator's position.)

Tip: Using the inserter function to create these iterators can save typing.

Definition at line 841 of file bits/stl_iterator.h.

Member Typedef Documentation

  template<typename _Container > typedef _Container std::insert_iterator< _Container >::container_type

A nested typedef for the type of whatever container you used.

Definition at line 860 of file bits/stl_iterator.h.

  typedef void std::iterator< output_iterator_tag , void , void , void , void >::difference_type [inherited]

Distance between iterators is represented as this type.

Definition at line 134 of file stl_iterator_base_types.h.

  typedef output_iterator_tag std::iterator< output_iterator_tag , void , void , void , void >::iterator_category [inherited]

One of the tag types.

Definition at line 130 of file stl_iterator_base_types.h.

  typedef void std::iterator< output_iterator_tag , void , void , void , void >::pointer [inherited]

This type represents a pointer-to-value_type.

Definition at line 136 of file stl_iterator_base_types.h.

  typedef void std::iterator< output_iterator_tag , void , void , void , void >::reference [inherited]

This type represents a reference-to-value_type.

Definition at line 138 of file stl_iterator_base_types.h.

  typedef void std::iterator< output_iterator_tag , void , void , void , void >::value_type [inherited]

The type 'pointed to' by the iterator.

Definition at line 132 of file stl_iterator_base_types.h.

Constructor & Destructor Documentation

  template<typename _Container > constexpr std::insert_iterator< _Container >::insert_iterator (_Container & __x, _Iter __i) [inline], [constexpr]
The only way to create this iterator is with a container and an initial position (a normal iterator into the container).

Definition at line 873 of file bits/stl_iterator.h.

Member Function Documentation

  template<typename _Container > constexpr insert_iterator& std::insert_iterator< _Container >::operator* () [inline], [constexpr]

Simply returns *this.

Definition at line 930 of file bits/stl_iterator.h.

  template<typename _Container > constexpr insert_iterator& std::insert_iterator< _Container >::operator++ () [inline], [constexpr]

Simply returns *this. (This iterator does not move.)

Definition at line 936 of file bits/stl_iterator.h.

  template<typename _Container > constexpr insert_iterator& std::insert_iterator< _Container >::operator++ (int) [inline], [constexpr]

Simply returns *this. (This iterator does not move.)

Definition at line 942 of file bits/stl_iterator.h.

  template<typename _Container > constexpr insert_iterator& std::insert_iterator< _Container >::operator= (const typename _Container::value_type & __value) [inline], [constexpr]

Parameters
    __value An instance of whatever type container_type::const_reference is; presumably a reference-to-const T for container<T>.

Returns
    This iterator, for chained operations.

This kind of iterator maintains its own position in the container. Assigning a value to the iterator will insert the value into the container at the place before the iterator.

The position is maintained such that subsequent assignments will insert values immediately after one another. For example,

// vector v contains A and Z

insert_iterator i (v, ++v.begin());
i = 1;
i = 2;
i = 3;

// vector v contains A, 1, 2, 3, and Z

Definition at line 910 of file bits/stl_iterator.h.

Author

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