Regular expressions library

The regular expressions library provides a class that represents regular expressions, which are a kind of mini-language used to perform pattern matching within strings.

Also provided in the regular expressions library are utility classes that provide support for various algorithms, iterators, exceptions, and type traits.

Main types

These classes encapsulate a regular expression and the results of matching a regular expression within a target sequence of characters.

Template:cpp/regex/dcl list basic regexTemplate:cpp/regex/dcl list match results

sub_match (C++11)

identifies a sub match in the analyzed string (class template)

Two typedefs are also provided for narrow and wide character types:

Algorithms

These functions are used to apply the regular expression encapsulated in a regex to a target sequence of characters..

regex_match (C++11)	try to match a regular expression with a complete string (function template)
regex_search (C++11)	check if a regular expression occurs anywhere within a string (function template)
regex_replace (C++11)	replace occurrences of a regular expression with some other text (function template)

Iterators

The regex iterators are used to traverse the entire set of regular expression matches found within a sequence.

regex_iterator (C++11)	(class template)
regex_token_iterator (C++11)	(class template)

Exceptions

This class defines the type of objects thrown as exceptions to report errors from the regular expressions library.

regex_error (C++11)

(class)

Traits

The regex traits class is used to encapsulate the localizable aspects of a regex.

regex_traits (C++11)

(class template)

Constants

Template:cpp/regex/dcl list syntax option typeTemplate:cpp/regex/dcl list match flag typeTemplate:cpp/regex/dcl list error type

Defined in namespace std::regex_constants