From Jason Turner

[front.insert.iterator]

C++17 → C++20 2.6 KB 69 lines
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Archived: C++17 | C++20
Markdown: C++17 | C++20
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  1. tmp/tmp68td8r8u/{from.md → to.md} +55 -11
tmp/tmp68td8r8u/{from.md → to.md} RENAMED
@@ -3,29 +3,73 @@
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  ``` cpp
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  namespace std {
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  template<class Container>
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  class front_insert_iterator {
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  protected:
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- Container* container;
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  public:
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  using iterator_category = output_iterator_tag;
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  using value_type = void;
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- using difference_type = void;
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  using pointer = void;
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  using reference = void;
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  using container_type = Container;
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- explicit front_insert_iterator(Container& x);
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- front_insert_iterator& operator=(const typename Container::value_type& value);
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- front_insert_iterator& operator=(typename Container::value_type&& value);
 
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- front_insert_iterator& operator*();
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- front_insert_iterator& operator++();
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- front_insert_iterator operator++(int);
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  };
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-
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- template <class Container>
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- front_insert_iterator<Container> front_inserter(Container& x);
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  }
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  ```
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  ``` cpp
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  namespace std {
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  template<class Container>
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  class front_insert_iterator {
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  protected:
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+ Container* container = nullptr;
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  public:
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  using iterator_category = output_iterator_tag;
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  using value_type = void;
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+ using difference_type = ptrdiff_t;
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  using pointer = void;
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  using reference = void;
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  using container_type = Container;
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+ constexpr front_insert_iterator() noexcept = default;
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+ constexpr explicit front_insert_iterator(Container& x);
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+ constexpr front_insert_iterator& operator=(const typename Container::value_type& value);
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+ constexpr front_insert_iterator& operator=(typename Container::value_type&& value);
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+ constexpr front_insert_iterator& operator*();
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+ constexpr front_insert_iterator& operator++();
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+ constexpr front_insert_iterator operator++(int);
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  };
 
 
 
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  }
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  ```
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+ ##### Operations <a id="front.insert.iter.ops">[[front.insert.iter.ops]]</a>
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+
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+ ``` cpp
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+ constexpr explicit front_insert_iterator(Container& x);
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+ ```
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+
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+ *Effects:* Initializes `container` with `addressof(x)`.
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+
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+ ``` cpp
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+ constexpr front_insert_iterator& operator=(const typename Container::value_type& value);
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+ ```
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+
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+ *Effects:* As if by: `container->push_front(value);`
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+
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+ *Returns:* `*this`.
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+
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+ ``` cpp
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+ constexpr front_insert_iterator& operator=(typename Container::value_type&& value);
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+ ```
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+
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+ *Effects:* As if by: `container->push_front(std::move(value));`
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+
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+ *Returns:* `*this`.
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+
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+ ``` cpp
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+ constexpr front_insert_iterator& operator*();
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+ ```
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+
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+ *Returns:* `*this`.
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+
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+ ``` cpp
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+ constexpr front_insert_iterator& operator++();
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+ constexpr front_insert_iterator operator++(int);
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+ ```
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+
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+ *Returns:* `*this`.
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+
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+ ##### `front_inserter` <a id="front.inserter">[[front.inserter]]</a>
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+
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+ ``` cpp
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+ template<class Container>
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+ constexpr front_insert_iterator<Container> front_inserter(Container& x);
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+ ```
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+
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+ *Returns:* `front_insert_iterator<Container>(x)`.
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+