////
Copyright 2017 Peter Dimov

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
////

[#weak_ptr]
# weak_ptr: Non-owning Observer
:toc:
:toc-title:
:idprefix: weak_ptr_