vendor/clap/examples/tutorial_derive/04_01_enum.md

   1 ```console
   2 $ 04_01_enum_derive --help
   3 A simple to use, efficient, and full-featured Command Line Argument Parser
   4
   5 Usage: 04_01_enum_derive[EXE] <MODE>
   6
   7 Arguments:
   8   <MODE>
   9           What mode to run the program in
  10
  11           Possible values:
  12           - fast: Run swiftly
  13           - slow: Crawl slowly but steadily
  14
  15 Options:
  16   -h, --help
  17           Print help (see a summary with '-h')
  18
  19   -V, --version
  20           Print version
  21
  22 $ 04_01_enum_derive -h
  23 A simple to use, efficient, and full-featured Command Line Argument Parser
  24
  25 Usage: 04_01_enum_derive[EXE] <MODE>
  26
  27 Arguments:
  28   <MODE>  What mode to run the program in [possible values: fast, slow]
  29
  30 Options:
  31   -h, --help     Print help (see more with '--help')
  32   -V, --version  Print version
  33
  34 $ 04_01_enum_derive fast
  35 Hare
  36
  37 $ 04_01_enum_derive slow
  38 Tortoise
  39
  40 $ 04_01_enum_derive medium
  41 ? failed
  42 error: invalid value 'medium' for '<MODE>'
  43   [possible values: fast, slow]
  44
  45 For more information, try '--help'.
  46
  47 ```