Function parse_argv

docopt.cpp:489–524

}

static PatternList parse_argv(Tokens tokens, std::vector<Option>& options, bool options_first)
{
	// Parse command-line argument vector.
	//
	// If options_first:
	//    argv ::= [ long | shorts ]* [ argument ]* [ '--' [ argument ]* ] ;
	// else:
	//    argv ::= [ long | shorts | argument ]* [ '--' [ argument ]* ] ;

	PatternList ret;
	while (tokens) {
		auto const& token = tokens.current();

		if (token=="--") {
			// option list is done; convert all the rest to arguments
			while (tokens) {
				ret.emplace_back(std::make_shared<Argument>("", tokens.pop()));
			}
		} else if (starts_with(token, "--")) {
			auto&& parsed = parse_long(tokens, options);
			std::move(parsed.begin(), parsed.end(), std::back_inserter(ret));
		} else if (token[0]=='-' && token != "-") {
			auto&& parsed = parse_short(tokens, options);
			std::move(parsed.begin(), parsed.end(), std::back_inserter(ret));
		} else if (options_first) {
			// option list is done; convert all the rest to arguments
			while (tokens) {
				ret.emplace_back(std::make_shared<Argument>("", tokens.pop()));
			}
		} else {
			ret.emplace_back(std::make_shared<Argument>("", tokens.pop()));
		}
	}

	return ret;
}

std::vector<Option> parse_defaults(std::string const& doc) {
	// This pattern is a delimiter by which we split the options.