Replace winix library with Clara

[utilForever]

I'll replace the winix library with the Clara. winix library is inconvenient to use, so I want to replace it with a library that supports a more convenient way.

• Clara : https://github.com/catchorg/Clara

[doyubkim]

Thanks! Does Clara provide auto generated help message? How does it compare to https://github.com/hbristow/argparse or other similar libraries?

[utilForever]

Yes. Clara provide auto-generated help message. For example:

inline std::string ToString(const clara::Opt& opt)
{
    std::ostringstream oss;
    oss << (clara::Parser() | opt);
    return oss.str();
}

inline std::string ToString(const clara::Parser& p)
{
    std::ostringstream oss;
    oss << p;
    return oss.str();
}

...

auto parser =
		clara::Help(showHelp) |
		clara::Opt(targetSpacing, "targetSpacing")
		["-s"]["--spacing"]
		("target particle spacing (default is 0.02)");
if (showHelp)
{
	std::cout << ToString(parser) << '\n';
	exit(EXIT_SUCCESS);
}

It has a more concise syntax than other libraries and has the advantage of automatically generating help.

[doyubkim]

Cool. Let’s add it as a git submodule.