20. std::cmatch cm; // same as std::match_results<const char*> cm;21. std::regex_match ("subject",cm,e);22. std::cout << "string literal with " << cm.size() << " matches\n";23.24. std::smatch sm; // same as std::match_results<string::const_iterat...
\P{InGreek} Any character except one in the Greek block (negation) [\p{L}&&[^\p{Lu}]] Any letter except an uppercase letter (subtraction) Boundary matchers ^ The beginning of a line $ The end of a line \b A word boundary \B A non-word boundary \A The beginning of the input...
.Dot.Matches any character except line breaks. *Quantifier.Match 0 or more of the preceding token. ) (Capturing group #2.Groups multiple tokens together and creates a capture group for extracting a substring or using a backreference. \\Escaped character.Matches a "\" character (char code 92...
. Dot. Matches any character except line breaks. + Quantifier. Match 1 or more of the preceding token. ? Lazy. Makes the preceding quantifier lazy, causing it to match as few characters as possible. \] Escaped character. Matches a "]" character (char code 93). ) + Quantifier. Match...
所有的 regex 引擎都依赖于 RegexRunner,它是一个基类,上面存储了所有必要的状态,以反馈给构成正则表达式实际匹配逻辑的 FindFirstChar 和 Go 方法(这些方法包含执行匹配的所有核心代码,其中 FindFirstChar 是一种优化,用于跳过不可能开始匹配的输入位置,然后 Go 执行实际匹配逻辑)。如果你看一下内部的RegexInterpreter...
The.is a metacharacter that can match any character except for a newline. The previous pattern is limited to a range of 1 to 100. []: the char class \ \ \ \ \ \ \d\ \ \ \ \: any digit \ \ \ \ \ \ \D\ \ \ \ \: any non-digit ...
ostringstream res(std::ios::out); std::ostream_iterator<char> ores(res); boost::regex_replace(ores, initial.begin(), initial.end(), ex, fmt, boost::match_default | boost::format_no_copy); cout << res.str() << endl;}int main(int argc, char *argv[]){ test1(); cout << ...
Char ClassDescription .Matches any character except \n. If modified by the Singleline option, a period character matches any character. For more information, see Regular Expression Options. [aeiou]Matches any single character included in the specified set of characters. ...
If MULTILINE mode is activated then ^ matches at the beginning of input and after any line terminator except at the end of input. When in MULTILINE mode $ matches just before a line terminator or the end of the input sequence. Groups and capturing Group number Capturing groups are ...
normal" id="end_input_except_term">\Z The end of the input but for the final terminator, if any \z The end of the input Linebreak matcher \R