tmp/tmpbuc6zhwo/{from.md → to.md}
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| 1 |
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#### Synopsis <a id="polymorphic.syn">[[polymorphic.syn]]</a>
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``` cpp
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namespace std {
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template<class T, class Allocator = allocator<T>>
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class polymorphic {
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public:
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using value_type = T;
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using allocator_type = Allocator;
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using pointer = allocator_traits<Allocator>::pointer;
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using const_pointer = allocator_traits<Allocator>::const_pointer;
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// [polymorphic.ctor], constructors
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constexpr explicit polymorphic();
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constexpr explicit polymorphic(allocator_arg_t, const Allocator& a);
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constexpr polymorphic(const polymorphic& other);
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constexpr polymorphic(allocator_arg_t, const Allocator& a, const polymorphic& other);
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constexpr polymorphic(polymorphic&& other) noexcept;
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constexpr polymorphic(allocator_arg_t, const Allocator& a, polymorphic&& other)
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noexcept(see below);
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template<class U = T>
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constexpr explicit polymorphic(U&& u);
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template<class U = T>
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constexpr explicit polymorphic(allocator_arg_t, const Allocator& a, U&& u);
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template<class U, class... Ts>
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constexpr explicit polymorphic(in_place_type_t<U>, Ts&&... ts);
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template<class U, class... Ts>
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constexpr explicit polymorphic(allocator_arg_t, const Allocator& a,
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in_place_type_t<U>, Ts&&... ts);
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template<class U, class I, class... Us>
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constexpr explicit polymorphic(in_place_type_t<U>, initializer_list<I> ilist, Us&&... us);
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template<class U, class I, class... Us>
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constexpr explicit polymorphic(allocator_arg_t, const Allocator& a,
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in_place_type_t<U>, initializer_list<I> ilist, Us&&... us);
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// [polymorphic.dtor], destructor
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constexpr ~polymorphic();
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// [polymorphic.assign], assignment
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constexpr polymorphic& operator=(const polymorphic& other);
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constexpr polymorphic& operator=(polymorphic&& other) noexcept(see below);
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// [polymorphic.obs], observers
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constexpr const T& operator*() const noexcept;
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constexpr T& operator*() noexcept;
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constexpr const_pointer operator->() const noexcept;
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constexpr pointer operator->() noexcept;
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constexpr bool valueless_after_move() const noexcept;
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constexpr allocator_type get_allocator() const noexcept;
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// [polymorphic.swap], swap
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constexpr void swap(polymorphic& other) noexcept(see below);
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friend constexpr void swap(polymorphic& lhs, polymorphic& rhs) noexcept(see below);
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private:
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Allocator alloc = Allocator(); // exposition only
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};
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}
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```
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