getopt example please

[Andrew Edwards]

On 2/26/14, 5:37 AM, Vladimir Panteleev wrote:
> On Wednesday, 26 February 2014 at 09:57:19 UTC, Andrew Edwards wrote:
>> Request a small example of how to use getopt to accomplish the following:
>>
>> [1] program subcommand //process subcommand with default arguments if any
>> [2] program -h subcommand //output help information about subcommand
>> [3] program subcommand --option1 --option2 true option3=log.txt //
>> process subcommand with user specified options
>
> import std.getopt;
>
> void main(string[] args)
> {
>      bool help;
>      getopt(args,
>          "h|help", &help,
>          config.stopOnFirstNonOption,
>      );
>
>      if (args.length == 1)
>      {
>          // Print general help and list of commands
>          return;
>      }
>
>      auto subcommand = args[1];
>      switch (subcommand)
>      {
>          case "subcommand":
>          {
>              if (help)
>              {
>                  // Print help for subcommand
>                  return;
>              }
>
>              bool option1;
>              string option2, option3;
>              getopt(args,
>                  "option1", &option1,
>                  "option2", &option2,
>                  "option3", &option3,
>              );
>
>              // Process subcommand with specified options
>
>              break;
>          }
>          default:
>              throw new Exception("Unknown subcommand "~ subcommand);
>      }
> }
>

Thank you very much.