Specifies whether or not a NDesk.Options.Option takes a value, and if it does, whether it's optional or required.
Member Name Description None No value is taken.
If an option takes no value, then the callback function will receive null if the value is false (e.g. -optionName- was used) and non-null if the value is true (e.g. -optionName, -optionName+).
Optional A value is optional.
This is specified by providing : after the option name within Option.Prototype.
If a value is optional, the callback function will receive null value if no value is provided, and will otherwise receive a non-null value.
Options with optional values are not "greedy" -- the value must be part of the current argument, e.g. -opt:foo will pass "foo" as the value to -opt, but -opt foo will pass null as the value to -opt.
Required A value is required.
This is specified by providing = after the option name within Option.Prototype.
Options with required values are "greedy" -- if the current argument does not contain a value, the next argument will be used as the value, e.g. both -opt:foo and -opt foo will pass "foo" as the value to -opt.
Namespace: NDesk.Options
Assembly: NDesk.Options (in NDesk.Options.dll)
Assembly Versions: 0.2.0.0, 0.2.1.0