Class Option

docopt_private.h:237–286

	};

	class Option final
	: public LeafPattern
	{
	public:
		static Option parse(std::string const& option_description);

		Option(std::string shortOption,
		       std::string longOption,
		       int argcount = 0,
		       value v = value{false})
		: LeafPattern(longOption.empty() ? shortOption : longOption,
			      std::move(v)),
		  fShortOption(std::move(shortOption)),
		  fLongOption(std::move(longOption)),
		  fArgcount(argcount)
		{
			// From Python:
			//   self.value = None if value is False and argcount else value
			if (argcount && v.isBool() && !v.asBool()) {
				setValue(value{});
			}
		}

		Option(Option const&) = default;
		Option(Option&&) = default;
		Option& operator=(Option const&) = default;
		Option& operator=(Option&&) = default;

		using LeafPattern::setValue;

		std::string const& longOption() const { return fLongOption; }
		std::string const& shortOption() const { return fShortOption; }
		int argCount() const { return fArgcount; }

		virtual size_t hash() const override {
			size_t seed = LeafPattern::hash();
			hash_combine(seed, fShortOption);
			hash_combine(seed, fLongOption);
			hash_combine(seed, fArgcount);
			return seed;
		}

	protected:
		virtual std::pair<size_t, std::shared_ptr<LeafPattern>> single_match(PatternList const& left) const override;

	private:
		std::string fShortOption;
		std::string fLongOption;
		int fArgcount;
	};

	class Required : public BranchPattern {
	public: