@@IFthe literal text @@IF (case insensitive) \ban ASCII word boundary
*?matches any number of characters from the set below:
\Sany non-whitespace character
\sany whitespace character
\r?optionally matches a carriage return (ASCII 13)
\na line-feed (newline) character (ASCII 10)
@the literal @ (6410 / 1008 / 4016)
@?optionally matches the literal @ (6410 / 1008 / 4016)
ENDthe literal text END (case insensitive) ?optionally matches the literal (3210 / 408 / 2016)
IFthe literal text IF (case insensitive)