. /include/boost/url /rfc /impl /uri_reference_rule.hpp
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1   // 1   //
2   // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com) 2   // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
3   // Copyright (c) 2023 Alan de Freitas (alandefreitas@gmail.com) 3   // Copyright (c) 2023 Alan de Freitas (alandefreitas@gmail.com)
4   // 4   //
5   // Distributed under the Boost Software License, Version 1.0. (See accompanying 5   // Distributed under the Boost Software License, Version 1.0. (See accompanying
6   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 6   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7   // 7   //
8   // Official repository: https://github.com/boostorg/url 8   // Official repository: https://github.com/boostorg/url
9   // 9   //
10   10  
11   #ifndef BOOST_URL_RFC_IMPL_URI_REFERENCE_RULE_HPP 11   #ifndef BOOST_URL_RFC_IMPL_URI_REFERENCE_RULE_HPP
12   #define BOOST_URL_RFC_IMPL_URI_REFERENCE_RULE_HPP 12   #define BOOST_URL_RFC_IMPL_URI_REFERENCE_RULE_HPP
13   13  
14   #include <boost/url/detail/config.hpp> 14   #include <boost/url/detail/config.hpp>
15   #include <boost/url/url_view.hpp> 15   #include <boost/url/url_view.hpp>
16   #include <boost/url/rfc/uri_rule.hpp> 16   #include <boost/url/rfc/uri_rule.hpp>
17   #include <boost/url/rfc/relative_ref_rule.hpp> 17   #include <boost/url/rfc/relative_ref_rule.hpp>
18   #include <boost/url/grammar/error.hpp> 18   #include <boost/url/grammar/error.hpp>
19   #include <boost/url/grammar/parse.hpp> 19   #include <boost/url/grammar/parse.hpp>
20   20  
21   namespace boost { 21   namespace boost {
22   namespace urls { 22   namespace urls {
23   23  
24   BOOST_URL_CXX20_CONSTEXPR_OR_INLINE 24   BOOST_URL_CXX20_CONSTEXPR_OR_INLINE
25   auto 25   auto
HITCBC 26   12773 implementation_defined::uri_reference_rule_t:: 26   12777 implementation_defined::uri_reference_rule_t::
27   parse( 27   parse(
28   char const*& it, 28   char const*& it,
29   char const* const end 29   char const* const end
30   ) const noexcept -> 30   ) const noexcept ->
31   system::result<value_type> 31   system::result<value_type>
32   { 32   {
33   // Try URI first, then relative-ref. 33   // Try URI first, then relative-ref.
34   // Use separate variables for each parse attempt 34   // Use separate variables for each parse attempt
35   // to avoid variant2 cross-alternative reassignment, 35   // to avoid variant2 cross-alternative reassignment,
36   // which uses placement new (not constexpr before C++26). 36   // which uses placement new (not constexpr before C++26).
HITCBC 37   12773 auto const it0 = it; 37   12777 auto const it0 = it;
HITCBC 38   12773 auto rv1 = grammar::parse( 38   12777 auto rv1 = grammar::parse(
39   it, end, uri_rule); 39   it, end, uri_rule);
HITCBC 40   12773 if(rv1) 40   12777 if(rv1)
HITCBC 41   2834 return *rv1; 41   2834 return *rv1;
HITCBC 42   9939 it = it0; 42   9943 it = it0;
HITCBC 43   9939 auto rv2 = grammar::parse( 43   9943 auto rv2 = grammar::parse(
44   it, end, relative_ref_rule); 44   it, end, relative_ref_rule);
HITCBC 45   9939 if(rv2) 45   9943 if(rv2)
HITCBC 46   9581 return *rv2; 46   9585 return *rv2;
HITCBC 47   358 BOOST_URL_CONSTEXPR_RETURN_EC( 47   358 BOOST_URL_CONSTEXPR_RETURN_EC(
48   grammar::error::mismatch); 48   grammar::error::mismatch);
49   } 49   }
50   50  
51   } // urls 51   } // urls
52   } // boost 52   } // boost
53   53  
54   54  
55   #endif 55   #endif