Option.this
this
(string short_, string long_, int argCount = 0, ArgValue value = ArgValue.init)Constructs an Option with short/long forms and argument count.
Parameters
short_ | The short form (e.g., "-v"), or null. |
long_ | The long form (e.g., "--verbose"), or null. |
argCount | 0 if flag-only, 1 if takes an argument. |
value | The default or parsed value. |