From Jason Turner

[istream.iterator.cons]

C++14 → C++17 1.9 KB 30 lines
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  #### `istream_iterator` constructors and destructor <a id="istream.iterator.cons">[[istream.iterator.cons]]</a>
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  ``` cpp
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- see below istream_iterator();
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  ```
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- *Effects:* Constructs the end-of-stream iterator. If `T` is a literal
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- type, then this constructor shall be a `constexpr` constructor.
 
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- `in_stream == 0`.
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  ``` cpp
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  istream_iterator(istream_type& s);
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  ```
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- *Effects:* Initializes *in_stream* with `&s`. *value* may be initialized
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- during construction or the first time it is referenced.
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- `in_stream == &s`.
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  ``` cpp
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  istream_iterator(const istream_iterator& x) = default;
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  ```
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- *Effects:* Constructs a copy of `x`. If `T` is a literal type, then this
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- constructor shall be a trivial copy constructor.
 
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- `in_stream == x.in_stream`.
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  ``` cpp
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  ~istream_iterator() = default;
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  ```
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- *Effects:* The iterator is destroyed. If `T` is a literal type, then
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- this destructor shall be a trivial destructor.
 
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  #### `istream_iterator` constructors and destructor <a id="istream.iterator.cons">[[istream.iterator.cons]]</a>
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  ``` cpp
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+ constexpr istream_iterator();
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  ```
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+ *Effects:* Constructs the end-of-stream iterator. If
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+ `is_trivially_default_constructible_v<T>` is `true`, then this
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+ constructor is a constexpr constructor.
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+ *Postconditions:* `in_stream == 0`.
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  ``` cpp
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  istream_iterator(istream_type& s);
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  ```
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+ *Effects:* Initializes `in_stream` with `addressof(s)`. `value` may be
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+ initialized during construction or the first time it is referenced.
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+ *Postconditions:* `in_stream == addressof(s)`.
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  ``` cpp
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  istream_iterator(const istream_iterator& x) = default;
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  ```
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+ *Effects:* Constructs a copy of `x`. If
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+ `is_trivially_copy_constructible_v<T>` is `true`, then this constructor
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+ is a trivial copy constructor.
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+ *Postconditions:* `in_stream == x.in_stream`.
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  ``` cpp
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  ~istream_iterator() = default;
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  ```
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+ *Effects:* The iterator is destroyed. If
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+ `is_trivially_destructible_v<T>` is `true`, then this destructor is a
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+ trivial destructor.
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