Method hash

docopt_private.h:125–130

		virtual std::string const& name() const override { return fName; }

		virtual size_t hash() const override {
			size_t seed = typeid(*this).hash_code();
			hash_combine(seed, fName);
			hash_combine(seed, fValue);
			return seed;
		}

	protected:
		virtual std::pair<size_t, std::shared_ptr<LeafPattern>> single_match(PatternList const&) const = 0;