Description:

Regular expressions are a form of pattern-matching that are often used in text
processing; many users will be familiar with the Unix utilities grep, sed and
awk, and the programming language perl, each of which make extensive use of
regular expressions. Traditionally C++ users have been limited to the POSIX C
API's for manipulating regular expressions, and while regex++ does provide
these API's, they do not represent the best way to use the library. For example
regex++ can cope with wide character strings, or search and replace operations
(in a manner analogous to either sed or perl), something that traditional C
libraries can not do.