[allocator.traits.members]

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static constexpr pointer allocate(Alloc& a, size_type n);

Returns: a.allocate(n).

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static constexpr pointer allocate(Alloc& a, size_type n, const_void_pointer hint);

Returns: a.allocate(n, hint) if that expression is well-formed; otherwise, a.allocate(n).

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static constexpr allocation_result<pointer, size_type> allocate_at_least(Alloc& a, size_type n);

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);

Throws: Nothing.

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template<class T, class. Args>
  static constexpr void construct(Alloc& a, T* p, Args&&. args);

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);

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;

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);

Returns: rhs.select_on_container_copy_construction() if that expression is well-formed; otherwise, rhs.

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]