the usage message generated by boost::program_options.

[MorningStar]

I wrote the following simple program:

//some includes here.
int main(int argc, char* argv[]) {
options_description desc("Usage");
desc.add_options()("help", "Show this message.");
desc.add_options()("config,c", value<string>(), "Specify the
configuration file.");

variables_map vm;
store(parse_command_line(argc, argv, desc), vm);
notify(vm);

if(vm.count("help")) {
cout << desc << endl;
return 0;
}

return 0;
}

And using the "--help" command line argument, it genrated the
following program usage:
Usage:
--help Show this message.
-c [ --config ] arg Specify the configuration file.

Who knows how to turn the "arg" in the last line into something more
meaningful, say, "file"?.
In other words, how to generate the last line as:
-c [ --config ] <file> Specify the configuration file.

 

[mlimber]

I wrote the following simple program:

//some includes here.
int main(int argc, char* argv[]) {
options_description desc("Usage");
desc.add_options()("help", "Show this message.");
desc.add_options()("config,c", value<string>(), "Specify the
configuration file.");

variables_map vm;
store(parse_command_line(argc, argv, desc), vm);
notify(vm);

if(vm.count("help")) {
cout << desc << endl;
return 0;
}

return 0;

}

And using the "--help" command line argument, it genrated the
following program usage:
Usage:
--help Show this message.
-c [ --config ] arg Specify the configuration file.

Who knows how to turn the "arg" in the last line into something more
meaningful, say, "file"?.
In other words, how to generate the last line as:
-c [ --config ] <file> Specify the configuration file.

I bet the folks on the Boost User List do (see http://boost.org/more/mailing_lists.htm#users).
Your question as stated is off-topic here (http://www.parashift.com/c+
+-faq-lite/how-to-post.html#faq-5.9).

Cheers! --M

 

[MorningStar]

I wrote the following simple program:

//some includes here.
int main(int argc, char* argv[]) {
options_description desc("Usage");
desc.add_options()("help", "Show this message.");
desc.add_options()("config,c", value<string>(), "Specify the
configuration file.");

variables_map vm;
store(parse_command_line(argc, argv, desc), vm);
notify(vm);

if(vm.count("help")) {
cout << desc << endl;
return 0;
}

return 0;

}

And using the "--help" command line argument, it genrated the
following program usage:
Usage:
--help Show this message.
-c [ --config ] arg Specify the configuration file.

Who knows how to turn the "arg" in the last line into something more
meaningful, say, "file"?.
In other words, how to generate the last line as:
-c [ --config ] <file> Specify the configuration file.

I bet the folks on the Boost User List do (seehttp://boost.org/more/mailing_lists.htm#users).
Your question as stated is off-topic here (http://www.parashift.com/c+
+-faq-lite/how-to-post.html#faq-5.9).

Cheers! --M- Òþ²Ø±»ÒýÓÃÎÄ×Ö -

- ÏÔʾÒýÓõÄÎÄ×Ö -

Thanks.