## Struct open_only_tag

boost::log::open_mode::open_only_tag — Opens an existing resource; fail if not exist.

## Synopsis

    // In header: <boost/log/utility/open_mode.hpp>

    struct open_only_tag {
    };

| Copyright © 2007-2016 Andrey Semashev 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).