[/ / Copyright (c) 2003-2020 Christopher M. Kohlhoff (chris at kohlhoff dot com) / / Distributed under the Boost Software License, Version 1.0. (See accompanying / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) /] [section:ProtoAllocator Proto-allocator requirements] A type `A` meets the proto-allocator requirements if `A` is `CopyConstructible` (C++Std [copyconstructible]), `Destructible` (C++Std [destructible]), and `allocator_traits::rebind_alloc` meets the allocator requirements (C++Std [allocator.requirements]), where `U` is an object type. [inline_note For example, `std::allocator` meets the proto-allocator requirements but not the allocator requirements.] No constructor, comparison operator, copy operation, move operation, or swap operation on these types shall exit via an exception. [endsect]