module with common regular expressions

 Regexp::Common is a Perl module that exports a single hash ('%RE') that
 stores or generates commonly needed regular expressions.
 .
 The module currently provides the following patterns:
 .
   * balanced parentheses and brackets
   * delimited text (with escapes)
   * integers and floating-point numbers in any base (up to 36)
   * comments in 44 languages
   * offensive language
   * lists of any pattern
   * IPv4 addresses
   * URIs
   * Zip codes