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Clon provides two utility functions to inquire on the current status of the command-line.

The function cmdline-options-p returns true if there are still unprocessed options on the command-line. The function cmdline-p returns true if there’s anything left on the command-line, that is, either unprocessed options, or a remainder. A potential use of cmdline-p at a very early stage of your application could be to automatically display a help string if the command-line is effectively empty.