20 Memory management library [mem]

20.2 Memory [memory]

20.2.9 Allocator traits [allocator.traits]

20.2.9.3 Static member functions [allocator.traits.members]

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[[nodiscard]] static constexpr pointer allocate(Alloc& a, size_type n);
1
#
Returns: a.allocate(n).
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[[nodiscard]] static constexpr pointer allocate(Alloc& a, size_type n, const_void_pointer hint);
2
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Returns: a.allocate(n, hint) if that expression is well-formed; otherwise, a.allocate(n).
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[[nodiscard]] static constexpr allocation_result<pointer, size_type> allocate_at_least(Alloc& a, size_type n);
3
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Returns: a.allocate_at_least(n) if that expression is well-formed; otherwise, {a.allocate(n), n}.
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static constexpr void deallocate(Alloc& a, pointer p, size_type n);
4
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Effects: Calls a.deallocate(p, n).
5
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Throws: Nothing.
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template<class T, class... Args> static constexpr void construct(Alloc& a, T* p, Args&&... args);
6
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Effects: Calls a.construct(p, std​::​forward<Args>(args)...) if that call is well-formed; otherwise, invokes construct_at(p, std​::​forward<Args>(args)...).
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template<class T> static constexpr void destroy(Alloc& a, T* p);
7
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Effects: Calls a.destroy(p) if that call is well-formed; otherwise, invokes destroy_at(p).
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static constexpr size_type max_size(const Alloc& a) noexcept;
8
#
Returns: a.max_size() if that expression is well-formed; otherwise, numeric_limits<size_type>​::​​max()/sizeof(value_type).
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static constexpr Alloc select_on_container_copy_construction(const Alloc& rhs);
9
#
Returns: rhs.select_on_container_copy_construction() if that expression is well-formed; otherwise, rhs.