libstdc++
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std::__detail::_Scanner< _CharT > Class Template Reference
Regular Expressions » Base and Implementation Classes

Inherits std::__detail::_ScannerBase.

Public Types

typedef const std::ctype< _CharT > _CtypeT
 
typedef regex_constants::syntax_option_type _FlagT
 
typedef const _CharT * _IterT
 
typedef std::basic_string< _CharT > _StringT
 
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
}
 

Public Member Functions

 _Scanner (_IterT __begin, _IterT __end, _FlagT __flags, std::locale __loc)
 
void _M_advance ()
 
_TokenT _M_get_token () const
 
const _StringT & _M_get_value () const
 

Protected Types

enum  _StateT { _S_state_normal, _S_state_in_brace, _S_state_in_bracket }
 

Protected Member Functions

const char * _M_find_escape (char __c)
 
bool _M_is_awk () const
 
bool _M_is_basic () const
 
bool _M_is_ecma () const
 
bool _M_is_extended () const
 
bool _M_is_grep () const
 

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 >

Scans an input range for regex tokens.

The _Scanner class interprets the regular expression pattern in the input range passed to its constructor as a sequence of parse tokens passed to the regular expression compiler. The sequence of tokens provided depends on the flag settings passed to the constructor: different regular expression grammars will interpret the same input pattern in syntactically different ways.

Definition at line 210 of file regex_scanner.h.

Member Enumeration Documentation

◆ _TokenT

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

Token types returned from the scanner.

Definition at line 46 of file regex_scanner.h.

The documentation for this class was generated from the following files: