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Diffstat (limited to 'boost/beast/core/detail/in_place_init.hpp')
| -rw-r--r-- | boost/beast/core/detail/in_place_init.hpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/boost/beast/core/detail/in_place_init.hpp b/boost/beast/core/detail/in_place_init.hpp new file mode 100644 index 0000000000..d3a33becd5 --- /dev/null +++ b/boost/beast/core/detail/in_place_init.hpp @@ -0,0 +1,43 @@ +// +// Copyright (c) 2016-2017 Vinnie Falco (vinnie dot falco at gmail 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) +// +// Official repository: https://github.com/boostorg/beast +// + +#ifndef BOOST_BEAST_DETAIL_IN_PLACE_INIT_HPP +#define BOOST_BEAST_DETAIL_IN_PLACE_INIT_HPP + +#include <boost/version.hpp> +#include <boost/optional/optional.hpp> + +// Provide boost::in_place_init_t and boost::in_place_init +// for Boost versions earlier than 1.63.0. + +#if BOOST_VERSION < 106300 + +namespace boost { + +namespace optional_ns { + +// a tag for in-place initialization of contained value +struct in_place_init_t +{ + struct init_tag{}; + explicit in_place_init_t(init_tag){} +}; +const in_place_init_t in_place_init ((in_place_init_t::init_tag())); + +} // namespace optional_ns + +using optional_ns::in_place_init_t; +using optional_ns::in_place_init; + +} + +#endif + +#endif + |