SYNOPSIS
        string *regexp(string *list, string pattern)

DESCRIPTION
        Match the pattern pattern against all strings in list, and
        return a new array with all strings that matched. This
        function uses the same syntax for regular expressions as ed():

        . Match any character.

        ^ Match begin of line.

        $ Match end of line.

        \< Match begin of word.

        \> Match end of word.

        \B not at edge of a word (supposed to be like the emacs
           compatibility one in gnu egrep), since 3.2@249

        x|y Match regexp x or regexp y.

        () Match enclosed regexp like a 'simple' one.

        x* Match any number (0 or more) of regexp x.

        x+ Match any number (1 or more) of regexp x.

        [..] Match one of the characters enclosed.

        [^ ..] Match none of the characters enclosed. The .. are to
        replaced by single characters or character ranges:
        [abc] matches a, b or c.
        [ab0-9] matches a, b or any digit.
        [^a-z] does not match any lowercase character.

        \c match character c even if it's one of the special characters.

        If there is an error in the regular expression, a runtime
        error will be raised.

EXAMPLE
        string strs;
        if (strs = regexp( ({"please, help me Sir John."}),
                                 "\\<help\\>.*\\<me\\>"))
           if (sizeof(strs)
              write("It matches.\n");

        The regular expression will test the given string (which is
        packed into an array) if there is something like "help ... me"
        inside of it.

HISTORY
        LDMud 3.2.9 added metacharacter '+'.

SEE ALSO
        regexplode(E), regreplace(E), sscanf(E)