std::scoped_allocator_adaptor<OuterAlloc,InnerAlloc...>::scoped_allocator_adaptor

Since C++11

// 1)
scoped_allocator_adaptor();
// 2)
template< class OuterA2 >
scoped_allocator_adaptor( OuterA2&& outerAlloc, const InnerAllocs&... innerAllocs) noexcept;
// 3)
scoped_allocator_adaptor( const scoped_allocator_adaptor& other ) noexcept;
// 4)
scoped_allocator_adaptor( scoped_allocator_adaptor&& other ) noexcept;
// 5)
template< class OuterA2 >
scoped_allocator_adaptor( const scoped_allocator_adaptor<OuterA2, InnerAllocs...>& other )  noexcept;
// 6)
template< class OuterA2 >
scoped_allocator_adaptor( scoped_allocator_adaptor<OuterA2, 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 constrained, interfering with metaprogramming	constraint added