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|---|---|---|---|
| 1 | // | ||
| 2 | // Copyright (c) 2021 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_ALNUM_CHARS_HPP | ||
| 11 | #define BOOST_URL_GRAMMAR_ALNUM_CHARS_HPP | ||
| 12 | |||
| 13 | #include <boost/url/detail/config.hpp> | ||
| 14 | #include <boost/url/grammar/detail/charset.hpp> | ||
| 15 | |||
| 16 | namespace boost { | ||
| 17 | namespace urls { | ||
| 18 | namespace grammar { | ||
| 19 | namespace implementation_defined { | ||
| 20 | struct alnum_chars_t | ||
| 21 | { | ||
| 22 | constexpr | ||
| 23 | bool | ||
| 24 | 5496 | operator()(char c) const noexcept | |
| 25 | { | ||
| 26 | return | ||
| 27 |
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5496 | (c >= '0' && c <= '9') || |
| 28 |
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12028 | (c >= 'A' && c <= 'Z') || |
| 29 |
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6532 | (c >= 'a' && c <= 'z'); |
| 30 | } | ||
| 31 | |||
| 32 | #ifdef BOOST_URL_USE_SSE2 | ||
| 33 | char const* | ||
| 34 | 256 | find_if( | |
| 35 | char const* first, | ||
| 36 | char const* last) const noexcept | ||
| 37 | { | ||
| 38 | 256 | return detail::find_if_pred( | |
| 39 | 256 | *this, first, last); | |
| 40 | } | ||
| 41 | |||
| 42 | char const* | ||
| 43 | 269 | find_if_not( | |
| 44 | char const* first, | ||
| 45 | char const* last) const noexcept | ||
| 46 | { | ||
| 47 | 269 | return detail::find_if_not_pred( | |
| 48 | 269 | *this, first, last); | |
| 49 | } | ||
| 50 | #endif | ||
| 51 | }; | ||
| 52 | } // implementation_defined | ||
| 53 | |||
| 54 | /** The set of letters and digits | ||
| 55 | |||
| 56 | @par Example | ||
| 57 | Character sets are used with rules and the | ||
| 58 | functions @ref find_if and @ref find_if_not. | ||
| 59 | @code | ||
| 60 | system::result< core::string_view > = parse( "Johnny42", token_rule( alnumchars ) ); | ||
| 61 | @endcode | ||
| 62 | |||
| 63 | @par BNF | ||
| 64 | @code | ||
| 65 | ALNUM = ALPHA / DIGIT | ||
| 66 | |||
| 67 | ALPHA = %x41-5A / %x61-7A | ||
| 68 | ; A-Z / a-z | ||
| 69 | |||
| 70 | DIGIT = %x30-39 | ||
| 71 | ; 0-9 | ||
| 72 | @endcode | ||
| 73 | |||
| 74 | @par Specification | ||
| 75 | @li <a href="https://datatracker.ietf.org/doc/html/rfc5234#appendix-B.1" | ||
| 76 | >B.1. Core Rules (rfc5234)</a> | ||
| 77 | |||
| 78 | @see | ||
| 79 | @ref find_if, | ||
| 80 | @ref find_if_not, | ||
| 81 | @ref parse, | ||
| 82 | @ref token_rule. | ||
| 83 | */ | ||
| 84 | constexpr implementation_defined::alnum_chars_t alnum_chars{}; | ||
| 85 | |||
| 86 | } // grammar | ||
| 87 | } // urls | ||
| 88 | } // boost | ||
| 89 | |||
| 90 | #endif | ||
| 91 |