Karl Berry Olaf Bachmann and many others. 8.13.13 Regular Expression matching and substituting The following listing contains the interface of the RegEx unit. This unit provides routines to match strings against regular expressions and perform substitutions using matched subexpressions.
Regular expressions are strings with some characters having special meanings.
They are similar to wild cards used in file name matching, but much more powerful. The RegEx unit provides routines to match strings against regular expressions and perform substitutions using matched subexpressions. Regular expressions are strings with some characters having special meanings. They are similar to wild cards used in file name matching, but much more powerful. There are two kinds of regular expressions supported by this unit, basic and extended regular expressions.