Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

                                             ◄Up► ◄Contents► ◄Index► ◄Back►
─────Programmer's WorkBench─────────────────────────────────────────────────
 
     A regular expression (sometimes called a "pattern") is a find
     string that uses special characters to match patterns of text. You
     can use regular expressions to find patterns such as five-digit
     numbers or strings in quotation marks. Selected portions of text
     found by using a regular expression can be used in a replacement.
 
     In PWB you can specify regular expressions in two ways: UNIX
     syntax and non-UNIX syntax. UNIX regular expressions have a syntax
     similar to regular expressions in the UNIX and XENIX operating
     systems. A subset of this syntax is used in the CodeView debugger.
     See: ◄UNIX Regular Expressions►
 
     Non-UNIX regular-expression syntax has the features of UNIX
     regular expressions, plus additional features, and uses a more
     compact syntax.
     See: ◄Non-UNIX Regular Expressions►
 
     The Unixre switch determines whether PWB uses UNIX or non-UNIX
     regular expressions in searches. PWB switches that accept regular
     expressions, such as Build and Word, always use UNIX syntax.
     See: Build, Unixre, Word
 
     See
 
     ◄UNIX Regular Expression Summary►
     ◄Non-UNIX Regular Expression Summary►
     ◄Tagged Regular Expressions►
     ◄Tagged Expressions in Build:Message►
     ◄Aligning Tagged Expressions►
     ◄Predefined Regular Expressions►
                                    -♦-