STD::__DETAIL::_SCANNER(3cxx)

okay bestie, this is the 3cxx manual page for std::__detail::_Scanner< _CharT > 💅 it’s the regex-token scanner from libstdc++’s std::__detail zone, and we’re keeping every single detail. no cap. 🎀

✨ NAME ✨

std::__detail::_Scanner< _CharT > — scans an input range for regex tokens. 🦋

🌸 SYNOPSIS 🌸

#include <regex>

Inherits std::__detail::_ScannerBase.

🌈 Public Types 🌈

• _CtypeT — typedef const std::ctype< _CharT > _CtypeT
• _FlagT — typedef regex_constants::syntax_option_type _FlagT
• _StringT — typedef std::basic_string< _CharT > _StringT
• _TokenT — token types returned from the scanner, fr fr:

enum _TokenT : unsigned {
    _S_token_anychar,
    _S_token_ord_char,
    _S_token_oct_num,
    _S_token_hex_num,
    _S_token_backref,
    _S_token_subexpr_begin,
    _S_token_subexpr_no_group_begin,
    _S_token_subexpr_lookahead_begin,
    _S_token_subexpr_end,
    _S_token_bracket_begin,
    _S_token_bracket_neg_begin,
    _S_token_bracket_end,
    _S_token_interval_begin,
    _S_token_interval_end,
    _S_token_quoted_class,
    _S_token_char_class_name,
    _S_token_collsymbol,
    _S_token_equiv_class_name,
    _S_token_opt,
    _S_token_or,
    _S_token_closure0,
    _S_token_closure1,
    _S_token_line_begin,
    _S_token_line_end,
    _S_token_word_bound,
    _S_token_comma,
    _S_token_dup_count,
    _S_token_eof,
    _S_token_bracket_dash,
    _S_token_unknown
}

Token types returned from the scanner. 👑

💜 Public Member Functions 💜

• _Scanner (const _CharT *__begin, const _CharT *__end, _FlagT __flags, std::locale __loc) — the constructor: you hand it the input range (__begin to __end), the flags, and the locale. 💖
• void _M_advance () — the advance member, signature exactly as shown.
• _TokenT _M_get_token () const noexcept — gets the token; signature exactly as shown.
• const _StringT & _M_get_value () const noexcept — gets the value; signature exactly as shown.

🧚 Protected Types 🧚

• _StateT — enum _StateT { _S_state_normal, _S_state_in_brace, _S_state_in_bracket }

🍓 Protected Member Functions 🍓

• const char * _M_find_escape (char __c) — the escape-finder member, exact signature.
• bool _M_is_awk () const — the awk grammar check, exact signature.
• bool _M_is_basic () const — the basic grammar check, exact signature.
• bool _M_is_ecma () const — the ecma grammar check, exact signature.
• bool _M_is_extended () const — the extended grammar check, exact signature.
• bool _M_is_grep () const — the grep grammar check, exact signature.

👑 Protected Attributes 👑

• bool _M_at_bracket_start
• const std::pair< char, char > _M_awk_escape_tbl [11]
• const char * _M_basic_spec_char
• const std::pair< char, char > _M_ecma_escape_tbl [8]
• const char * _M_ecma_spec_char
• const std::pair< char, char > * _M_escape_tbl
• const char * _M_extended_spec_char
• _FlagT _M_flags
• const char * _M_spec_char
• _StateT _M_state
• _TokenT _M_token
• const std::pair< char, _TokenT > _M_token_tbl [9]

🔥 Detailed Description 🔥

template<typename _CharT>
class std::__detail::_Scanner< _CharT >

The _Scanner class interprets the regular-expression pattern in the input range you pass to its constructor as a sequence of parse tokens that get passed to the regular-expression compiler. The sequence of tokens you get depends on the flag settings passed to the constructor: different regular-expression grammars will interpret the same input pattern in syntactically different ways. same pattern, different grammar rules, different parse-token era — iykyk 💅

⭐ Member Enumeration Documentation ⭐

enum std::__detail::_ScannerBase::_TokenT : unsigned [inherited]

Token types returned from the scanner. 👑

🫶 Author 🫶

Generated automatically by Doxygen for libstdc++ from the source code.

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