<regex> operators <regex> typedefs basic_regex class match_results class regex_constants namespace regex_error class regex_iterator class regex_token_iterator class regex_traits class regex_traits<char> class regex_traits<wchar_t> class sub_match class ...
operator>=Comparison of various objects, greater than or equal. operator<<Inserts asub_matchin a stream. See also Regular Expressions (C++) regex_constantsClass regex_errorClass <regex>functions regex_iteratorClass <regex>operators regex_token_iteratorClass ...
with the last character of the match being the input character just before the current position. Does not alter the input position. The length of possible strings matched by the look-behind pattern must not be unbounded (no * or + operators). ...
重复操作符,或数量词,都描述了查找一个特定字符的次数。它们常被用于字符匹配语法以查找多行的字符,可参见表B。 Table B: Regular expression repetition operators 锚 锚是指它所要匹配的格式,如图C所示。使用它能方便你查找通用字符的合并。例如,我用vi行编辑器命令:s来代表substitute,这一命令的基本语法是: s/...
Operators func...(Character,Character) ->CharacterClass Returns a character class that includes the characters in the given range. func...(UnicodeScalar,UnicodeScalar) ->CharacterClass Returns a character class that includes the Unicode scalars in the given range....
Regular expressions can be modified using operators that let you specify zero, one, or more repetitions of a character or expression. These repetition operators are placed immediately following the literal character or metacharacter used in the pattern: ...
Here are some examples of how these operators can be used: `a.b` will match any three-character string that starts with `a` and ends with `b`. `a+b` will match any string that starts with `a` and ends with `b`, and has one or more `a` characters in between. ...
Supported Operators Operator Description Example . Matches any character. x.zmatches "xyz", "xaz", etc. ? The preceding character is optional and matches if it occurs no more than once. xyz?matches "xy" and "xyz" + The preceding character matches if it occurs one or more times. ...
从OCR库中扫描)，检查文本中的几个简单单词" The“、"date”、"or“、"to”和“.”。
operators $regexfind (aggregation) on this page definition syntax behavior examples definition $regexfind provides regular expression (regex) pattern matching capability in aggregation expressions. if a match is found, returns a document that contains information on the first match. if a match is not...