isEof()
Checks if there are more command line options to be read.
Syntax
Getopt.isEof( )
  RETURNS BOOLEANUsage
This is a method for the Getopt type, used to check if there are no more command line options to
process.
The isEof() method can be used after calling the getopt() method processing
command line options, to stop the processing when no more known command line options are to be
processed.
Example
IMPORT FGL getopt
MAIN
    DEFINE g getopt.Getopt
    DEFINE s INTEGER
    ...
    WHILE TRUE
        LET s = g.getOpt()
        IF g.isEof() THEN EXIT WHILE END IF
        DISPLAY g.opt_char
    END WHILE
END MAIN