20 Memory management library [mem]

20.5 Class template scoped_allocator_adaptor [allocator.adaptor]

20.5.4 Members [allocator.adaptor.members]

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In the construct member functions, OUTERMOST(x) is OUTERMOST(x.outer_allocator()) if the expression x.outer_allocator() is valid ([temp.deduct]) and x otherwise; OUTERMOST_ALLOC_TRAITS(x) is allocator_traits<remove_reference_t<decltype(OUTERMOST(x))>>.
[Note 1: 
OUTERMOST(x) and OUTERMOST_ALLOC_TRAITS(x) are recursive operations.
It is incumbent upon the definition of outer_allocator() to ensure that the recursion terminates.
It will terminate for all instantiations of scoped_allocator_adaptor.
— end note]
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inner_allocator_type& inner_allocator() noexcept; const inner_allocator_type& inner_allocator() const noexcept;
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Returns: *this if sizeof...(InnerAllocs) is zero; otherwise, inner.
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outer_allocator_type& outer_allocator() noexcept;
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Returns: static_cast<OuterAlloc&>(*this).
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const outer_allocator_type& outer_allocator() const noexcept;
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Returns: static_cast<const OuterAlloc&>(*this).
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pointer allocate(size_type n);
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Returns: allocator_traits<OuterAlloc>​::​allocate(outer_allocator(), n).
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pointer allocate(size_type n, const_void_pointer hint);
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Returns: allocator_traits<OuterAlloc>​::​allocate(outer_allocator(), n, hint).
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void deallocate(pointer p, size_type n) noexcept;
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Effects: As if by: allocator_traits<OuterAlloc>​::​deallocate(outer_allocator(), p, n);
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size_type max_size() const;
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Returns: allocator_traits<OuterAlloc>​::​max_size(outer_allocator()).
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template<class T, class... Args> void construct(T* p, Args&&... args);
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Effects: Equivalent to: apply([p, this](auto&&... newargs) { OUTERMOST_ALLOC_TRAITS(*this)::construct( OUTERMOST(*this), p, std::forward<decltype(newargs)>(newargs)...); }, uses_allocator_construction_args<T>(inner_allocator(), std::forward<Args>(args)...));
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template<class T> void destroy(T* p);
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Effects: Calls OUTERMOST_ALLOC_TRAITS(*this)​::​destroy(OUTERMOST(*this), p).
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scoped_allocator_adaptor select_on_container_copy_construction() const;
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Returns: A new scoped_allocator_adaptor object where each allocator a1 within the adaptor is initialized with allocator_traits<A1>​::​select_on_container_copy_construction(a2), where A1 is the type of a1 and a2 is the corresponding allocator in *this.