In the construct member functions, OUTERMOST(x) is x if x does not have an outer_allocator() member function and
OUTERMOST(x.outer_allocator()) otherwise; OUTERMOST_ALLOC_TRAITS(x) is
allocator_traits<decltype(OUTERMOST(x))>. [ Note: 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 ]
inner_allocator_type& inner_allocator() noexcept; const inner_allocator_type& inner_allocator() const noexcept;
Returns: *this if sizeof...(InnerAllocs) is zero; otherwise, inner.
outer_allocator_type& outer_allocator() noexcept;
Returns: static_cast<OuterAlloc&>(*this).
const outer_allocator_type& outer_allocator() const noexcept;
Returns: static_cast<const OuterAlloc&>(*this).
pointer allocate(size_type n);
Returns: allocator_traits<OuterAlloc>::allocate(outer_allocator(), n).
pointer allocate(size_type n, const_void_pointer hint);
Returns: allocator_traits<OuterAlloc>::allocate(outer_allocator(), n, hint).
void deallocate(pointer p, size_type n) noexcept;
Effects: allocator_traits<OuterAlloc>::deallocate(outer_allocator(), p, n);
Returns: allocator_traits<OuterAlloc>::max_size(outer_allocator()).
template <class T, class... Args> void construct(T* p, Args&&... args);
Effects:
If uses_allocator<T, inner_allocator_type>::value is false and is_constructible<T, Args...>::value is true, calls OUTERMOST_ALLOC_TRAITS(*this)::construct(
OUTERMOST(*this), p, std::forward<Args>(args)...).
Otherwise, if uses_allocator<T, inner_allocator_type>::value is true and is_constructible<T, allocator_arg_t, inner_allocator_type, Args...>::value is true, calls OUTERMOST_ALLOC_TRAITS(*this)::construct(OUTERMOST(*this), p, allocator_arg,
inner_allocator(), std::forward<Args>(args)...).
Otherwise, if uses_allocator<T, inner_allocator_type>::value is true and is_constructible<T, Args..., inner_allocator_type>::value is true, calls OUTERMOST_ALLOC_TRAITS(*this):: construct(OUTERMOST(*this), p, std::forward<Args>(args)...,
inner_allocator()).
Otherwise, the program is ill-formed. [ Note: An error will result if uses_allocator evaluates to true but the specific constructor does not take an allocator. This definition prevents a silent failure to pass an inner allocator to a contained element. — end note ]
template <class T1, class T2, class... Args1, class... Args2> void construct(pair<T1, T2>* p,piecewise_construct_t, tuple<Args1...> x, tuple<Args2...> y);
Requires: all of the types in Args1 and Args2 shall be CopyConstructible (Table [copyconstructible]).
Effects: Constructs a tuple object xprime from x by the following rules:
If uses_allocator<T1, inner_allocator_type>::value is false and is_constructible<T1, Args1...>::value is true, then xprime is x.
Otherwise, if uses_allocator<T1, inner_allocator_type>::value is true and is_constructible<T1, allocator_arg_t, inner_allocator_type, Args1...>::value is true, then xprime is tuple_cat(tuple<allocator_arg_t, inner_allocator_type&>( allocator_arg, inner_allocator()), std::move(x)).
Otherwise, if uses_allocator<T1, inner_allocator_type>::value is true and is_constructible<T1, Args1..., inner_allocator_type>::value is true, then xprime is tuple_cat(std::move(x), tuple<inner_allocator_type&>(inner_allocator())).
Otherwise, the program is ill-formed.
and constructs a tuple object yprime from y by the following rules:
If uses_allocator<T2, inner_allocator_type>::value is false and is_constructible<T2, Args2...>::value is true, then yprime is y.
Otherwise, if uses_allocator<T2, inner_allocator_type>::value is true and is_constructible<T2, allocator_arg_t, inner_allocator_type, Args2...>::value is true, then yprime is tuple_cat(tuple<allocator_arg_t, inner_allocator_type&>( allocator_arg, inner_allocator()), std::move(y)).
Otherwise, if uses_allocator<T2, inner_allocator_type>::value is true and is_constructible<T2, Args2..., inner_allocator_type>::value is true, then yprime is tuple_cat(std::move(y), tuple<inner_allocator_type&>(inner_allocator())).
Otherwise, the program is ill-formed.
then calls OUTERMOST_ALLOC_TRAITS(*this)::construct(OUTERMOST(*this), p,
piecewise_construct, std::move(xprime), std::move(yprime)).
template <class T1, class T2> void construct(pair<T1, T2>* p);
Effects: Equivalent to this->construct(p, piecewise_construct, tuple<>(), tuple<>()).
template <class T1, class T2, class U, class V> void construct(pair<T1, T2>* p, U&& x, V&& y);
Effects: Equivalent to this->construct(p, piecewise_construct, forward_as_tuple(std::forward<U>(x)), forward_as_tuple(std::forward<V>(y))).
template <class T1, class T2, class U, class V> void construct(pair<T1, T2>* p, const pair<U, V>& x);
Effects: Equivalent to this->construct(p, piecewise_construct, forward_as_tuple(x.first), forward_as_tuple(x.second)).
template <class T1, class T2, class U, class V> void construct(pair<T1, T2>* p, pair<U, V>&& x);
Effects: Equivalent to this->construct(p, piecewise_construct, forward_as_tuple(std::forward<U>(x.first)), forward_as_tuple(std::forward<V>(x.second))).
template <class T> void destroy(T* p);
Effects: calls OUTERMOST_ALLOC_TRAITS(*this)::destroy(OUTERMOST(*this), p).
scoped_allocator_adaptor select_on_container_copy_construction() const;
Returns: A new scoped_allocator_adaptor object where each allocator A in the adaptor is initialized from the result of calling allocator_traits<A>::select_on_container_copy_construction() on the corresponding allocator in *this.
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