[auto.ptr] - C++14 → C++17

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-### Class template `auto_ptr` <a id="auto.ptr">[[auto.ptr]]</a>
-The class template `auto_ptr` stores a pointer to an object obtained via
-`new` and deletes that object when it itself is destroyed (such as when
-leaving block scope  [[stmt.dcl]]).
-The class template `auto_ptr_ref` is for exposition only. An
-implementation is permitted to provide equivalent functionality without
-providing a template with this name. The template holds a reference to
-an `auto_ptr`. It is used by the `auto_ptr` conversions to allow
-`auto_ptr` objects to be passed to and returned from functions.
-``` cpp
-namespace std {
-  template <class Y> struct auto_ptr_ref;   // exposition only
-  template <class X> class auto_ptr {
-  public:
-    typedef X element_type;
-    // [auto.ptr.cons] construct/copy/destroy:
-    explicit auto_ptr(X* p =0) throw();
-    auto_ptr(auto_ptr&) throw();
-    template<class Y> auto_ptr(auto_ptr<Y>&) throw();
-    auto_ptr& operator=(auto_ptr&) throw();
-    template<class Y> auto_ptr& operator=(auto_ptr<Y>&) throw();
-    auto_ptr& operator=(auto_ptr_ref<X> r) throw();
-   ~auto_ptr() throw();
-    // [auto.ptr.members] members:
-    X& operator*() const throw();
-    X* operator->() const throw();
-    X* get() const throw();
-    X* release() throw();
-    void reset(X* p =0) throw();
-    // [auto.ptr.conv] conversions:
-    auto_ptr(auto_ptr_ref<X>) throw();
-    template<class Y> operator auto_ptr_ref<Y>() throw();
-    template<class Y> operator auto_ptr<Y>() throw();
-  };
-  template <> class auto_ptr<void>
-  {
-  public:
-    typedef void element_type;
-  };
-}
-```
-The class template `auto_ptr` provides a semantics of strict ownership.
-An `auto_ptr` owns the object it holds a pointer to. Copying an
-`auto_ptr` copies the pointer and transfers ownership to the
-destination. If more than one `auto_ptr` owns the same object at the
-same time the behavior of the program is undefined. The uses of
-`auto_ptr` include providing temporary exception-safety for dynamically
-allocated memory, passing ownership of dynamically allocated memory to a
-function, and returning dynamically allocated memory from a function.
-Instances of `auto_ptr` meet the requirements of `MoveConstructible` and
-`MoveAssignable`, but do not meet the requirements of
-`CopyConstructible` and `CopyAssignable`.
-#### `auto_ptr` constructors <a id="auto.ptr.cons">[[auto.ptr.cons]]</a>
-``` cpp
-explicit auto_ptr(X* p =0) throw();
-```
-*Postconditions:* `*this` holds the pointer `p`.
-``` cpp
-auto_ptr(auto_ptr& a) throw();
-```
-*Effects:* Calls `a.release()`.
-*Postconditions:* `*this` holds the pointer returned from `a.release()`.
-``` cpp
-template<class Y> auto_ptr(auto_ptr<Y>& a) throw();
-```
-*Requires:* `Y*` can be implicitly converted to `X*`.
-*Effects:* Calls `a.release()`.
-*Postconditions:* `*this` holds the pointer returned from `a.release()`.
-``` cpp
-auto_ptr& operator=(auto_ptr& a) throw();
-```
-*Requires:* The expression `delete get()` is well formed.
-*Effects:* `reset(a.release())`.
-*Returns:* `*this`.
-``` cpp
-template<class Y> auto_ptr& operator=(auto_ptr<Y>& a) throw();
-```
-*Requires:* `Y*` can be implicitly converted to `X*`. The expression
-`delete get()` is well formed.
-*Effects:* `reset(a.release())`.
-*Returns:* `*this`.
-``` cpp
-~auto_ptr() throw();
-```
-*Requires:* The expression `delete get()` is well formed.
-*Effects:* `delete get()`.
-#### `auto_ptr` members <a id="auto.ptr.members">[[auto.ptr.members]]</a>
-``` cpp
-X& operator*() const throw();
-```
-*Requires:* `get() != 0`
-*Returns:* `*get()`
-``` cpp
-X* operator->() const throw();
-```
-*Returns:* `get()`
-``` cpp
-X* get() const throw();
-```
-*Returns:* The pointer `*this` holds.
-``` cpp
-X* release() throw();
-```
-*Returns:* `get()`
-`*this` holds the null pointer.
-``` cpp
-void reset(X* p=0) throw();
-```
-*Effects:* If `get() != p` then `delete get()`.
-*Postconditions:* `*this` holds the pointer `p`.
-#### `auto_ptr` conversions <a id="auto.ptr.conv">[[auto.ptr.conv]]</a>
-``` cpp
-auto_ptr(auto_ptr_ref<X> r) throw();
-```
-*Effects:* Calls `p.release()` for the `auto_ptr` `p` that `r` holds.
-*Postconditions:* `*this` holds the pointer returned from `release()`.
-``` cpp
-template<class Y> operator auto_ptr_ref<Y>() throw();
-```
-*Returns:* An `auto_ptr_ref<Y>` that holds `*this`.
-``` cpp
-template<class Y> operator auto_ptr<Y>() throw();
-```
-*Effects:* Calls `release()`.
-*Returns:* An `auto_ptr<Y>` that holds the pointer returned from
-`release()`.
-``` cpp
-auto_ptr& operator=(auto_ptr_ref<X> r) throw()
-```
-*Effects:* Calls `reset(p.release())` for the `auto_ptr p` that `r`
-holds a reference to.
-*Returns:* `*this`

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