. /src /detail /replacement_field_rule.cpp
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1   // 1   //
2   // Copyright (c) 2022 Alan de Freitas (alandefreitas@gmail.com) 2   // Copyright (c) 2022 Alan de Freitas (alandefreitas@gmail.com)
3   // 3   //
4   // Distributed under the Boost Software License, Version 1.0. (See accompanying 4   // Distributed under the Boost Software License, Version 1.0. (See accompanying
5   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 5   // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6   // 6   //
7   // Official repository: https://github.com/boostorg/url 7   // Official repository: https://github.com/boostorg/url
8   // 8   //
9   9  
10   10  
11   #include <boost/url/detail/config.hpp> 11   #include <boost/url/detail/config.hpp>
12   #include "boost/url/detail/replacement_field_rule.hpp" 12   #include "boost/url/detail/replacement_field_rule.hpp"
13   #include <boost/url/grammar/alnum_chars.hpp> 13   #include <boost/url/grammar/alnum_chars.hpp>
14   #include <boost/url/grammar/alpha_chars.hpp> 14   #include <boost/url/grammar/alpha_chars.hpp>
15   #include <boost/url/grammar/delim_rule.hpp> 15   #include <boost/url/grammar/delim_rule.hpp>
16   #include <boost/url/grammar/lut_chars.hpp> 16   #include <boost/url/grammar/lut_chars.hpp>
17   #include <boost/url/grammar/optional_rule.hpp> 17   #include <boost/url/grammar/optional_rule.hpp>
18   #include <boost/url/grammar/parse.hpp> 18   #include <boost/url/grammar/parse.hpp>
19   #include <boost/url/grammar/token_rule.hpp> 19   #include <boost/url/grammar/token_rule.hpp>
20   #include <boost/url/grammar/tuple_rule.hpp> 20   #include <boost/url/grammar/tuple_rule.hpp>
21   #include <boost/url/grammar/vchars.hpp> 21   #include <boost/url/grammar/vchars.hpp>
22   22  
23   namespace boost { 23   namespace boost {
24   namespace urls { 24   namespace urls {
25   namespace detail { 25   namespace detail {
26   26  
27   auto 27   auto
HITCBC 28   815 replacement_field_rule_t:: 28   815 replacement_field_rule_t::
29   parse( 29   parse(
30   char const*& it, 30   char const*& it,
31   char const* const end) const noexcept -> 31   char const* const end) const noexcept ->
32   system::result<value_type> 32   system::result<value_type>
33   { 33   {
34   static constexpr auto replacement_field_rules = 34   static constexpr auto replacement_field_rules =
35   grammar::tuple_rule( 35   grammar::tuple_rule(
36   // open 36   // open
37   grammar::squelch( 37   grammar::squelch(
38   grammar::delim_rule('{')), 38   grammar::delim_rule('{')),
39   // id 39   // id
40   grammar::optional_rule(arg_id_rule), 40   grammar::optional_rule(arg_id_rule),
41   // format options 41   // format options
42   grammar::optional_rule( 42   grammar::optional_rule(
43   grammar::tuple_rule( 43   grammar::tuple_rule(
44   grammar::squelch( 44   grammar::squelch(
45   grammar::delim_rule(':')), 45   grammar::delim_rule(':')),
46   format_spec_rule)), 46   format_spec_rule)),
47   // close 47   // close
48   grammar::squelch( 48   grammar::squelch(
49   grammar::delim_rule('}'))); 49   grammar::delim_rule('}')));
HITCBC 50   815 auto it0 = it; 50   815 auto it0 = it;
HITCBC 51   815 auto rv = grammar::parse(it, end, replacement_field_rules); 51   815 auto rv = grammar::parse(it, end, replacement_field_rules);
HITCBC 52   815 if (!rv) 52   815 if (!rv)
53   { 53   {
HITCBC 54   399 BOOST_URL_RETURN_EC( 54   399 BOOST_URL_RETURN_EC(
55   grammar::error::mismatch); 55   grammar::error::mismatch);
56   } 56   }
HITCBC 57   416 return core::string_view(it0, it); 57   416 return core::string_view(it0, it);
58   } 58   }
59   59  
60   auto 60   auto
HITCBC 61   791 identifier_rule_t:: 61   791 identifier_rule_t::
62   parse( 62   parse(
63   char const*& it, 63   char const*& it,
64   char const* const end) const noexcept 64   char const* const end) const noexcept
65   -> system::result<value_type> 65   -> system::result<value_type>
66   { 66   {
67   static constexpr auto identifier_rules = 67   static constexpr auto identifier_rules =
68   grammar::tuple_rule( 68   grammar::tuple_rule(
69   grammar::delim_rule( 69   grammar::delim_rule(
70   grammar::alpha_chars + 70   grammar::alpha_chars +
71   grammar::lut_chars('_')), 71   grammar::lut_chars('_')),
72   grammar::optional_rule( 72   grammar::optional_rule(
73   grammar::token_rule( 73   grammar::token_rule(
74   grammar::alnum_chars + 74   grammar::alnum_chars +
75   grammar::lut_chars('_')))); 75   grammar::lut_chars('_'))));
HITCBC 76   791 char const* it0 = it; 76   791 char const* it0 = it;
HITCBC 77   791 auto rv = grammar::parse(it, end, identifier_rules); 77   791 auto rv = grammar::parse(it, end, identifier_rules);
HITCBC 78   791 if (!rv) 78   791 if (!rv)
79   { 79   {
HITCBC 80   397 BOOST_URL_RETURN_EC( 80   397 BOOST_URL_RETURN_EC(
81   grammar::error::mismatch); 81   grammar::error::mismatch);
82   } 82   }
HITCBC 83   394 return core::string_view(it0, it); 83   394 return core::string_view(it0, it);
84   } 84   }
85   85  
86   auto 86   auto
HITCBC 87   88 format_spec_rule_t:: 87   88 format_spec_rule_t::
88   parse( 88   parse(
89   char const*& it, 89   char const*& it,
90   char const* const end) const noexcept 90   char const* const end) const noexcept
91   -> system::result<value_type> 91   -> system::result<value_type>
92   { 92   {
HITCBC 93   88 if (it == end) 93   88 if (it == end)
HITCBC 94   2 return {}; 94   2 return {};
95   95  
96   // any tokens allowed in fmt specs 96   // any tokens allowed in fmt specs
97   static constexpr auto fmt_specs_token_rule = 97   static constexpr auto fmt_specs_token_rule =
98   grammar::optional_rule( 98   grammar::optional_rule(
99   grammar::token_rule( 99   grammar::token_rule(
100   grammar::vchars + 100   grammar::vchars +
101   grammar::lut_chars(' ') 101   grammar::lut_chars(' ')
102   - "{}")); 102   - "{}"));
103   103  
104   // internal ids in the fmt specs 104   // internal ids in the fmt specs
105   // "{" [arg_id] "}" 105   // "{" [arg_id] "}"
106   static constexpr auto internal_id_rule = 106   static constexpr auto internal_id_rule =
107   grammar::tuple_rule( 107   grammar::tuple_rule(
108   grammar::squelch( 108   grammar::squelch(
109   grammar::delim_rule('{')), 109   grammar::delim_rule('{')),
110   grammar::optional_rule( 110   grammar::optional_rule(
111   arg_id_rule), 111   arg_id_rule),
112   grammar::squelch( 112   grammar::squelch(
113   grammar::delim_rule('}'))); 113   grammar::delim_rule('}')));
114   114  
HITCBC 115   86 auto start = it; 115   86 auto start = it;
116   // consume fmt_spec chars 116   // consume fmt_spec chars
HITCBC 117   114 while (grammar::parse(it, end, fmt_specs_token_rule)) 117   114 while (grammar::parse(it, end, fmt_specs_token_rule))
118   { 118   {
HITCBC 119   114 auto it0 = it; 119   114 auto it0 = it;
120   // consume internal id 120   // consume internal id
HITCBC 121   114 if (!grammar::parse(it, end, internal_id_rule)) 121   114 if (!grammar::parse(it, end, internal_id_rule))
122   { 122   {
123   // rewind 123   // rewind
HITCBC 124   86 it = it0; 124   86 it = it0;
HITCBC 125   86 break; 125   86 break;
126   } 126   }
127   } 127   }
128   128  
HITCBC 129   86 return core::string_view(start, it); 129   86 return core::string_view(start, it);
130   } 130   }
131   131  
132   } // detail 132   } // detail
133   } // urls 133   } // urls
134   } // boost 134   } // boost
135   135