[boost] [program_options] printing the variable map

From: Jeff Garland (jeff_at_[hidden])
Date: 2004-08-02 19:57:54

I'm writing a program with program_options (very cool and useful library, BTW)
and I found myself wanting to print out the variable_map values for debugging
purposes.  Is there an easy way to do this?

Also couple of documentation nits:
1) From the first example....

 if (vm.count("help")) {
      std::cout << desc << "\n";

I had to read the code to figure out that variable_map inherits from std::map,
and this is why you can call this.  Documentation only says:

 class variables_map
  :  : public boost::program_options::abstract_variables_map
 
2) In the 'Storage Component' section -- there's this:

 Let's consider an example: 

        variables_map vm;
        store(parse_command_line(argc, argv, desc), vm);
        store(parse_config_file("example.cfg", desc), vm);
        finish(vm);
 ....     
 Finally the call to notify function runs user-specified notify 
 functions and stores values into regular variables, if needed. 

I assume 'finish' is supposed to be notify?  I don't see any docs for finish.

Jeff