chickadee » agrep » pattern

pattern STRING #!optional TRANSLprocedure

Compiles a search pattern. The syntax for patterns is similar to that of the Unix shell. The following constructs are recognized:

match any single character
match any sequence of characters
character set: ranges are denoted with -, as in [a-z]; an initial ^, as in [^0-9], complements the set
conjunction (e.g. sweet&sour)
alternative (e.g. high|low)
escape special characters; the special characters are \?*[]&|().

The optional argument TRANSL is a character translation table.