20 Memory management library [mem]

20.3 Smart pointers [smartptr]

20.3.1 Unique-ownership pointers [unique.ptr]

20.3.1.2 Default deleters [unique.ptr.dltr]

20.3.1.2.1 General [unique.ptr.dltr.general]

20.3.1.2.2 default_delete [unique.ptr.dltr.dflt]

20.3.1.2.3 default_delete<T[]> [unique.ptr.dltr.dflt1]

20.3.1.2.1 General [unique.ptr.dltr.general]

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The class template default_delete serves as the default deleter (destruction policy) for the class template unique_ptr.
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The template parameter T of default_delete may be an incomplete type.

20.3.1.2.2 default_delete [unique.ptr.dltr.dflt]

namespace std { template<class T> struct default_delete { constexpr default_delete() noexcept = default; template<class U> constexpr default_delete(const default_delete<U>&) noexcept; constexpr void operator()(T*) const; }; }
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template<class U> constexpr default_delete(const default_delete<U>& other) noexcept;
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Constraints: U* is implicitly convertible to T*.
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Effects: Constructs a default_delete object from another default_delete<U> object.
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constexpr void operator()(T* ptr) const;
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Mandates: T is a complete type.
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Effects: Calls delete on ptr.

20.3.1.2.3 default_delete<T[]> [unique.ptr.dltr.dflt1]

namespace std { template<class T> struct default_delete<T[]> { constexpr default_delete() noexcept = default; template<class U> constexpr default_delete(const default_delete<U[]>&) noexcept; template<class U> constexpr void operator()(U* ptr) const; }; }
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template<class U> constexpr default_delete(const default_delete<U[]>& other) noexcept;
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Constraints: U(*)[] is convertible to T(*)[].
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Effects: Constructs a default_delete object from another default_delete<U[]> object.
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template<class U> constexpr void operator()(U* ptr) const;
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Constraints: U(*)[] is convertible to T(*)[].
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Mandates: U is a complete type.
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Effects: Calls delete[] on ptr.