cppdraft_translate/cppdraft/default/allocator/general.md

[default.allocator.general]

20 Memory management library [mem]

20.2 Memory [memory]

20.2.10 The default allocator [default.allocator]

20.2.10.1 General [default.allocator.general]

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All specializations of the default allocator meet the allocator completeness requirements ([allocator.requirements.completeness]).

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namespace std {template class allocator {public:using value_type = T; using size_type = size_t; using difference_type = ptrdiff_t; using propagate_on_container_move_assignment = true_type; constexpr allocator() noexcept; constexpr allocator(const allocator&) noexcept; template constexpr allocator(const allocator&) noexcept; constexpr ~allocator(); constexpr allocator& operator=(const allocator&) = default; constexpr T* allocate(size_t n); constexpr allocation_result<T*> allocate_at_least(size_t n); constexpr void deallocate(T* p, size_t n); };}

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allocator_traits<allocator>​::​is_always_equal​::​value is true for any T.