getopt Basic usage

[James Gray]

I am trying to use getopt and would not like the program to throw 
an unhandled exception when parsing command line options. Is the 
following, adapted from the first example in the getopt 
documentation, a reasonable approach?


import std.getopt;

string data = "file.dat";
int length = 24;
bool verbose;
enum Color { no, yes };
Color color;

void main(string[] args)
{

  try {
  auto helpInformation = getopt(
    args,
    std.getopt.config.stopOnFirstNonOption,
    "length",  &length,    // numeric
    "file",    &data,      // string
    "verbose", &verbose,   // flag
    "color", "Information about this color", &color);    // enum

   if (helpInformation.helpWanted)
   {
    defaultGetoptPrinter("Some information about the program.",
      helpInformation.options);
   }
  }
  catch(Exception e) {
   import std.stdio : writeln;
   writeln(e.msg, "\nFor more information use --help");
  }
}