How to enforce docopt to parse one option only? -


folks!

i trying docopt (cpp variant). have tried variant:

  usage:     prog [-o | --out-file=<out-file>] <in-file>     prog -h | --help     prog --version    options:     -h --help                  show screen.     --version                  show version.     -o, --out-file=<out-file>  output file name [default: stdout].     <in-file>                  input file.

i expected docopt expects 0 or 1 out-file option , gives me string result, can accept 2 or more options , gives me string-list value.

is right?

i found works expected when corrected command-line description this:

usage:   prog [-o<out-file>|--out-file=<out-file>] <in-file>   prog -h | --help   prog --version  options:   -h --help                  show screen.   --version                  show version.   -o, --out-file=<out-file>  output file name [default: stdout].   <in-file>                  input file.

or this:

usage:   prog [-o<out-file>] <in-file>   prog -h | --help   prog --version  options:   -h --help                  show screen.   --version                  show version.   -o, --out-file=<out-file>  output file name [default: stdout].   <in-file>                  input file.

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