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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

 ◄Details►                                   ◄Up► ◄Contents► ◄Index► ◄Back►
─────Programmer's WorkBench─────────────────────────────────────────────────
 
     This table summarizes PWB's UNIX-style regular-expression syntax.
 
     Syntax         Description
 
     \c             Escape: literal character <c>
     .              Wildcard: any character
     ^              Beginning of line
     $              End of line
     [class]        Character class: any one character in set
     [^class]       Inverse class: any one character not in set
     x*             Repeat: zero or more occurrences of <x>
     x+             Repeat: one or more occurrences of <x>
     \{x\}          Grouping: group subexpression for repetition
     \{x\!y\!z\}    Alternation: match one from the set
     \~x            "Not": fail if <x> at this point
     \(x\)          Tagged expression
     \n             Reference to tagged expression number <n>
     \:e            Predefined expression:
 
                    Syntax    Description
 
                    \:a       Alphanumeric character
                    \:b       White space
                    \:c       Alphabetic character
                    \:d       Digit
                    \:f       Part of a filename
                    \:h       Hexadecimal number
                    \:i       C-style identifier
                    \:n       Unsigned number
                    \:p       Path
                    \:q       Quoted string
                    \:w       English word
                    \:z       Unsigned integer
 
     See
 
     ◄Non-UNIX Regular Expression Summary►
     ◄Aligning Tagged Expressions►
     ◄Predefined Regular Expressions►
     ◄Tagged Regular Expressions►
     ◄UNIX Regular Expression Examples►
                                    -♦-