Function hash_components

src/ifcgeom/taxonomy.h:264–274

				}

				uint32_t hash_components() const {
					size_t h = std::hash<size_t>{}(T::RowsAtCompileTime);
					boost::hash_combine(h, std::hash<size_t>{}(T::ColsAtCompileTime));
					if (components_) {
						for (int i = 0; i < components_->size(); ++i) {
							auto elem = *(components_->data() + (size_t)i);
							boost::hash_combine(h, std::hash<typename T::Scalar>()(elem));
						}
					}
					return (uint32_t)h;
				}
			};

			struct IFC_GEOM_API matrix4 : public item, public eigen_base<Eigen::Matrix4d> {