20 Memory management library [mem]

20.3 Smart pointers [smartptr]

20.3.1 Unique-ownership pointers [unique.ptr]

20.3.1.3 unique_ptr for single objects [unique.ptr.single]

20.3.1.3.5 Observers [unique.ptr.single.observers]

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constexpr add_lvalue_reference_t<T> operator*() const noexcept(noexcept(*declval<pointer>()));
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Mandates: reference_converts_from_temporary_v<add_lvalue_reference_t<T>, decltype(
*declval<pointer>())> is false.
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Preconditions: get() != nullptr is true.
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Returns: *get().
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constexpr pointer operator->() const noexcept;
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Preconditions: get() != nullptr.
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Returns: get().
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[Note 1: 
The use of this function typically requires that T be a complete type.
— end note]
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constexpr pointer get() const noexcept;
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Returns: The stored pointer.
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constexpr deleter_type& get_deleter() noexcept; constexpr const deleter_type& get_deleter() const noexcept;
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Returns: A reference to the stored deleter.
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constexpr explicit operator bool() const noexcept;
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Returns: get() != nullptr.