Re: [Boost-users] program_options requires non-const argv

From: Pedro Lamarão (pedro.lamarao_at_[hidden])
Date: 2006-01-26 13:08:28

Merrill Cornish escreveu:
> Steve,
> 
> I ran into the same problem.  Once I thought about it, I realized
> I had _never_ seen a C or C++ main() function prototype defined
> with a const second argument.
> 
> I think I remember that one of the traditional C getopt() function
> variants actually munges the argument list by removing that
> arguments it recognizes, leaving anything else for direct processing
> by the program.

This is still possible if the type of the second argument is
char const* argv[] as shown by the following code:

char const* args[] = { "zero", "one" };
std::swap(args[0], args[1]);
std::cout << args[0] << std::endl;
std::cout << args[1] << std::endl;

It wouldn't hurt if parse_command_line and friends had a const there, if
they don't change the strings by design.

-- 
Pedro Lamarão
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