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    Copyright (c) 2005-2010 Joel de Guzman
    Copyright (c) 2010 Thomas Heller
    Copyright (c) 2014 John Fletcher
    Distributed under the Boost Software License, Version 1.0. (See accompanying
    file LICENSE_1_0.txt or copy at

#include <iostream>
#include <boost/phoenix/version.hpp>
// Some other things may be needed here...

// Include all proto for the time being...
#include <boost/proto/proto.hpp>

namespace boost { namespace phoenix

    // For now just drop through to the Proto versions.

    /// \brief Pretty-print a Phoenix expression tree using the Proto code.
    /// \note Equivalent to <tt>functional::display_expr(0, sout)(expr)</tt>
    /// \param expr The Phoenix expression tree to pretty-print
    /// \param sout The \c ostream to which the output should be
    ///             written. If not specified, defaults to
    ///             <tt>std::cout</tt>.
    template<typename Expr>
    void display_expr(Expr const &expr, std::ostream &sout)

    /// \overload
    template<typename Expr>
    void display_expr(Expr const &expr)

  } // namespace phoenix
} // namespace boost