Class Optional

docopt_private.h:295–305

	};

	class Optional : public BranchPattern {
	public:
		using BranchPattern::BranchPattern;

		bool match(PatternList& left, std::vector<std::shared_ptr<LeafPattern>>& collected) const override {
			for(auto const& pattern : fChildren) {
				pattern->match(left, collected);
			}
			return true;
		}
	};

	class OptionsShortcut : public Optional {
		using Optional::Optional;