rfc/detail/h16_rule.hpp

0001 //
0002 // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
0003 //
0004 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0005 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 //
0007 // Official repository: https://github.com/boostorg/url
0008 //
0009
0010 #ifndef BOOST_URL_RFC_DETAIL_H16_RULE_HPP
0011 #define BOOST_URL_RFC_DETAIL_H16_RULE_HPP
0012
0013 #include <boost/url/detail/config.hpp>
0014 #include <boost/url/error_types.hpp>
0015 #include <cstdint>
0016
0017 namespace boost {
0018 namespace urls {
0019 namespace detail {
0020
0021 /** Rule for h16
0022
0023     This parses a sixteen bit unsigned
0024     hexadecimal number.
0025
0026     @par BNF
0027     @code
0028     h16         = 1*4HEXDIG
0029                 ; 16 bits of address represented in hexadecimal
0030     @endcode
0031
0032     @par Specification
0033     @li <a href="https://datatracker.ietf.org/doc/html/rfc3986#section-3.2.2"
0034         >3.2.2.  Host (rfc3986)</a>
0035 */
0036 struct h16_rule_t
0037 {
0038     struct value_type
0039     {
0040         std::uint8_t hi;
0041         std::uint8_t lo;
0042     };
0043
0044     auto
0045     parse(
0046         char const*& it,
0047         char const* end
0048             ) const noexcept ->
0049         system::result<value_type>;
0050 };
0051
0052 constexpr h16_rule_t h16_rule{};
0053
0054 } // detail
0055 } // urls
0056 } // boost
0057
0058 #endif