deduction guides for std::scoped_allocator_adaptor

Defined in header <scoped_allocator>
template< class OuterAlloc, class... InnerAllocs >

scoped_allocator_adaptor( OuterAlloc, InnerAllocs... )

    -> scoped_allocator_adaptor<OuterAlloc, InnerAllocs...>;
(since C++17)

One deduction guide is provided for std::scoped_allocator_adaptor to make it possible to deduce its outer allocator.

Example