string_param.hpp

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//
// 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_STRING_PARAM_HPP
#define BOOST_BEAST_STRING_PARAM_HPP

#include <boost/beast/config.hpp>
#include <boost/beast/core/string.hpp>
#include <boost/beast/core/static_string.hpp>
#include <boost/beast/core/detail/static_ostream.hpp>
#include <boost/beast/core/detail/type_traits.hpp>
#include <boost/optional.hpp>

namespace boost {
namespace beast {

class string_param
{
    string_view sv_;
    char buf_[128];
    boost::optional<detail::static_ostream> os_;

    template<class T>
    typename std::enable_if<
        std::is_integral<T>::value>::type
    print(T const&);

    template<class T>
    typename std::enable_if<
        ! std::is_integral<T>::value &&
        ! std::is_convertible<T, string_view>::value
    >::type
    print(T const&);

    void
    print(string_view);

    template<class T>
    typename std::enable_if<
        std::is_integral<T>::value>::type
    print_1(T const&);

    template<class T>
    typename std::enable_if<
        ! std::is_integral<T>::value>::type
    print_1(T const&);

    void
    print_n()
    {
    }

    template<class T0, class... TN>
    void
    print_n(T0 const&, TN const&...);

    template<class T0, class T1, class... TN>
    void
    print(T0 const&, T1 const&, TN const&...);

public:
    string_param(string_param const&) = delete;

    string_param& operator=(string_param const&) = delete;

    template<class... Args>
    string_param(Args const&... args);

    string_view
    str() const
    {
        return sv_;
    }

    operator string_view const() const
    {
        return sv_;
    }
};

} // beast
} // boost

#include <boost/beast/core/impl/string_param.ipp>

#endif