GCC Code Coverage Report

Directory: libs/url/
File: boost/url/grammar/delim_rule.hpp
Date: 2024-08-20 16:05:55
Exec Total Coverage
Lines: 16 16 100.0%
Functions: 6 6 100.0%
Branches: 4 4 100.0%
Line Branch Exec Source
1 //
2 // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
3 //
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)
6 //
7 // Official repository: https://github.com/boostorg/url
8 //
9
10 #ifndef BOOST_URL_GRAMMAR_DELIM_RULE_HPP
11 #define BOOST_URL_GRAMMAR_DELIM_RULE_HPP
12
13 #include <boost/url/detail/config.hpp>
14 #include <boost/core/detail/string_view.hpp>
15 #include <boost/url/grammar/charset.hpp>
16 #include <boost/url/grammar/error.hpp>
17 #include <boost/url/grammar/type_traits.hpp>
18 #include <type_traits>
19
20 namespace boost {
21 namespace urls {
22 namespace grammar {
23
24 /** Match a character literal
25
26 This matches the specified character.
27 The value is a reference to the character
28 in the underlying buffer, expressed as a
29 `core::string_view`. The function @ref squelch
30 may be used to turn this into `void` instead.
31 If there is no more input, the error code
32 @ref error::need_more is returned.
33
34 @par Value Type
35 @code
36 using value_type = core::string_view;
37 @endcode
38
39 @par Example
40 Rules are used with the function @ref parse.
41 @code
42 system::result< core::string_view > rv = parse( ".", delim_rule('.') );
43 @endcode
44
45 @par BNF
46 @code
47 char = %00-FF
48 @endcode
49
50 @param ch The character to match
51
52 @see
53 @ref parse,
54 @ref squelch.
55 */
56 #ifdef BOOST_URL_DOCS
57 constexpr
58 __implementation_defined__
59 delim_rule( char ch ) noexcept;
60 #else
61
62 namespace implementation_defined {
63 struct ch_delim_rule
64 {
65 using value_type = core::string_view;
66
67 constexpr
68 11591 ch_delim_rule(char ch) noexcept
69 11591 : ch_(ch)
70 {
71 11591 }
72
73 BOOST_URL_DECL
74 system::result<value_type>
75 parse(
76 char const*& it,
77 char const* end) const noexcept;
78
79 private:
80 char ch_;
81 };
82 } // implementation_defined
83
84 /** Match a character literal
85
86 This matches the specified character.
87 The value is a reference to the character
88 in the underlying buffer, expressed as a
89 `core::string_view`. The function @ref squelch
90 may be used to turn this into `void` instead.
91 If there is no more input, the error code
92 @ref error::need_more is returned.
93
94 @par Value Type
95 @code
96 using value_type = core::string_view;
97 @endcode
98
99 @par Example
100 Rules are used with the function @ref parse.
101 @code
102 system::result< core::string_view > rv = parse( ".", delim_rule('.') );
103 @endcode
104
105 @par BNF
106 @code
107 char = %00-FF
108 @endcode
109
110 @param ch The character to match
111
112 @see
113 @ref parse,
114 @ref squelch.
115 */
116 constexpr
117 implementation_defined::ch_delim_rule
118 11591 delim_rule( char ch ) noexcept
119 {
120 11591 return {ch};
121 }
122 #endif
123
124 //------------------------------------------------
125
126 /** Match a single character from a character set
127
128 This matches exactly one character which
129 belongs to the specified character set.
130 The value is a reference to the character
131 in the underlying buffer, expressed as a
132 `core::string_view`. The function @ref squelch
133 may be used to turn this into `void` instead.
134 If there is no more input, the error code
135 @ref error::need_more is returned.
136
137 @par Value Type
138 @code
139 using value_type = core::string_view;
140 @endcode
141
142 @par Example
143 Rules are used with the function @ref parse.
144 @code
145 system::result< core::string_view > rv = parse( "X", delim_rule( alpha_chars ) );
146 @endcode
147
148 @param cs The character set to use.
149
150 @see
151 @ref alpha_chars,
152 @ref parse,
153 @ref squelch.
154 */
155 #ifdef BOOST_URL_DOCS
156 template<class CharSet>
157 constexpr
158 __implementation_defined__
159 delim_rule( CharSet const& cs ) noexcept;
160 #else
161 namespace implementation_defined {
162 template<class CharSet>
163 struct cs_delim_rule
164 {
165 using value_type = core::string_view;
166
167 constexpr
168 3 cs_delim_rule(
169 CharSet const& cs) noexcept
170 : cs_(cs)
171 {
172 3 }
173
174 system::result<value_type>
175 877 parse(
176 char const*& it,
177 char const* end) const noexcept
178 {
179
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 877 if(it == end)
180 {
181 // end
182 1 BOOST_URL_RETURN_EC(
183 error::need_more);
184 }
185
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 876 if(! cs_(*it))
186 {
187 // wrong character
188 350 BOOST_URL_RETURN_EC(
189 error::mismatch);
190 }
191 1052 return core::string_view{
192 526 it++, 1 };
193 }
194
195 private:
196 CharSet cs_;
197 };
198 } // implementation_defined
199
200 /** Match a single character from a character set
201
202 This matches exactly one character which
203 belongs to the specified character set.
204 The value is a reference to the character
205 in the underlying buffer, expressed as a
206 `core::string_view`. The function @ref squelch
207 may be used to turn this into `void` instead.
208 If there is no more input, the error code
209 @ref error::need_more is returned.
210
211 @par Value Type
212 @code
213 using value_type = core::string_view;
214 @endcode
215
216 @par Example
217 Rules are used with the function @ref parse.
218 @code
219 system::result< core::string_view > rv = parse( "X", delim_rule( alpha_chars ) );
220 @endcode
221
222 @param cs The character set to use.
223
224 @see
225 @ref alpha_chars,
226 @ref parse,
227 @ref squelch.
228 */
229 template<class CharSet>
230 constexpr
231 typename std::enable_if<
232 ! std::is_convertible<
233 CharSet, char>::value,
234 implementation_defined::cs_delim_rule<CharSet>>::type
235 3 delim_rule(
236 CharSet const& cs) noexcept
237 {
238 // If you get a compile error here it
239 // means that your type does not meet
240 // the requirements for a CharSet.
241 // Please consult the documentation.
242 static_assert(
243 is_charset<CharSet>::value,
244 "CharSet requirements not met");
245
246 3 return implementation_defined::cs_delim_rule<CharSet>(cs);
247 }
248 #endif
249
250 } // grammar
251 } // urls
252 } // boost
253
254 #endif
255