NAME¶

std::scoped_allocator_adaptor::scoped_allocator_adaptor - std::scoped_allocator_adaptor::scoped_allocator_adaptor

Synopsis¶

Defined in header <scoped_allocator>
scoped_allocator_adaptor(); (1) (since C++11)
template< class OuterA2 >
scoped_allocator_adaptor( OuterA2&& outerAlloc, const (2) (since C++11)
InnerAllocs&... innerAllocs) noexcept;
scoped_allocator_adaptor( const scoped_allocator_adaptor& other ) (3) (since C++11)
noexcept;
scoped_allocator_adaptor( scoped_allocator_adaptor&& other ) (4) (since C++11)
noexcept;
template< class OuterA2 >
scoped_allocator_adaptor( const scoped_allocator_adaptor<OuterA2, (5) (since C++11)
InnerAllocs...>& other ) noexcept;
template< class OuterA2 >
scoped_allocator_adaptor( scoped_allocator_adaptor<OuterA2, (6) (since C++11)
InnerAllocs...>&& other ) noexcept;

1) Default constructor: value-initializes the OuterAlloc base class and the inner
allocator member object, if used by the implementation.
2) Constructs the base class OuterAlloc from std::forward<OuterA2>(outerAlloc), and
the inner allocators with innerAllocs.... This overload participates in overload
resolution only if std::is_constructible<OuterAlloc, OuterA2>::value is true.
3) Copy-constructor: initializes each allocator from the corresponding allocator of
other
4) Move-constructor: moves each allocator from the corresponding allocator of other
into *this
5) Initializes each allocator from the corresponding allocator of other. This
overload participates in overload resolution only if
std::is_constructible<OuterAlloc, const OuterA2&>::value is true.
6) Initializes each allocator from the corresponding allocator of other, using move
semantics. This overload participates in overload resolution only if
std::is_constructible<OuterAlloc, OuterA2>::value is true.

Parameters¶

outerAlloc - constructor argument for the outer allocator
innerAllocs... - constructor arguments for the inner allocators
other - another std::scoped_allocator_adaptor

Defect reports

The following behavior-changing defect reports were applied retroactively to
previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 2782 C++11 constructors taking OuterA2 weren't constraint added
constrained, interfering with metaprogramming

See also¶

allocate allocates uninitialized storage using the outer allocator
(public member function)
constructs an object in allocated storage, passing the inner allocator to
construct its constructor if appropriate
(public member function)