Annex D (normative) Compatibility features [depr]

D.10 Raw storage iterator [depr.storage.iterator]

The header <memory> has the following addition:

namespace std {
  template <class OutputIterator, class T>
  class raw_storage_iterator {
  public:
    using iterator_category = output_iterator_tag;
    using value_type        = void;
    using difference_type   = void;
    using pointer           = void;
    using reference         = void;

    explicit raw_storage_iterator(OutputIterator x);

    raw_storage_iterator& operator*();
    raw_storage_iterator& operator=(const T& element);
    raw_storage_iterator& operator=(T&& element);
    raw_storage_iterator& operator++();
    raw_storage_iterator  operator++(int);
    OutputIterator base() const;
  };
}

raw_storage_iterator is provided to enable algorithms to store their results into uninitialized memory.

The template parameter OutputIterator is required to have its operator* return an object for which operator& is defined and returns a pointer to T, and is also required to satisfy the requirements of an output iterator ([output.iterators]).

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explicit raw_storage_iterator(OutputIterator x);

Effects: Initializes the iterator to point to the same value to which x points.

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raw_storage_iterator& operator*();

Returns: *this

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raw_storage_iterator& operator=(const T& element);

Requires: T shall be CopyConstructible.

Effects: Constructs a value from element at the location to which the iterator points.

Returns: A reference to the iterator.

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raw_storage_iterator& operator=(T&& element);

Requires: T shall be MoveConstructible.

Effects: Constructs a value from std::move(element) at the location to which the iterator points.

Returns: A reference to the iterator.

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raw_storage_iterator& operator++();

Effects: Pre-increment: advances the iterator and returns a reference to the updated iterator.

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raw_storage_iterator operator++(int);

Effects: Post-increment: advances the iterator and returns the old value of the iterator.

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OutputIterator base() const;

Returns: An iterator of type OutputIterator that points to the same value as *this points to.