url/rfc/uri_reference_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_URI_REFERENCE_RULE_HPP
0011 #define BOOST_URL_RFC_URI_REFERENCE_RULE_HPP
0012
0013 #include <boost/url/detail/config.hpp>
0014 #include <boost/url/error_types.hpp>
0015 #include <boost/url/url_view.hpp>
0016
0017 namespace boost {
0018 namespace urls {
0019
0020 /** Rule for URI-reference
0021
0022     @par Value Type
0023     @code
0024     using value_type = url_view;
0025     @endcode;
0026
0027     @par Example
0028     Rules are used with the function @ref grammar::parse.
0029     @code
0030     system::result< url_view > rv = grammar::parse( "ws://echo.example.com/?name=boost#demo", uri_reference_rule );
0031     @endcode
0032
0033     @par BNF
0034     @code
0035     URI-reference = URI / relative-ref
0036
0037     URI           = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
0038     relative-ref  = relative-part [ "?" query ] [ "#" fragment ]
0039     @endcode
0040
0041     @par Specification
0042     @li <a href="https://datatracker.ietf.org/doc/html/rfc3986#section-3"
0043         >3. Syntax Components (rfc3986)</a>
0044
0045     @see
0046         @ref grammar::parse,
0047         @ref parse_uri_reference,
0048         @ref url_view.
0049 */
0050 #ifdef BOOST_URL_DOCS
0051 constexpr __implementation_defined__ uri_reference_rule{};
0052 #else
0053 struct uri_reference_rule_t
0054 {
0055     using value_type = url_view;
0056
0057     BOOST_URL_DECL
0058     auto
0059     parse(
0060         char const*& it,
0061         char const* end
0062             ) const noexcept ->
0063     system::result<value_type>;
0064 };
0065
0066 constexpr uri_reference_rule_t uri_reference_rule{};
0067 #endif
0068
0069 } // urls
0070 } // boost
0071
0072 #endif