Method compare_rel

external/pugixml/pugixml.cpp:6879–6948

		}

		template <class Comp> static bool compare_rel(xpath_ast_node* lhs, xpath_ast_node* rhs, const xpath_context& c, const xpath_stack& stack, const Comp& comp)
		{
			xpath_value_type lt = lhs->rettype(), rt = rhs->rettype();

			if (lt != xpath_type_node_set && rt != xpath_type_node_set)
				return comp(lhs->eval_number(c, stack), rhs->eval_number(c, stack));
			else if (lt == xpath_type_node_set && rt == xpath_type_node_set)
			{
				xpath_allocator_capture cr(stack.result);

				xpath_node_set_raw ls = lhs->eval_node_set(c, stack);
				xpath_node_set_raw rs = rhs->eval_node_set(c, stack);

				for (const xpath_node* li = ls.begin(); li != ls.end(); ++li)
				{
					xpath_allocator_capture cri(stack.result);

					double l = convert_string_to_number(string_value(*li, stack.result).c_str());

					for (const xpath_node* ri = rs.begin(); ri != rs.end(); ++ri)
					{
						xpath_allocator_capture crii(stack.result);

						if (comp(l, convert_string_to_number(string_value(*ri, stack.result).c_str())))
							return true;
					}
				}

				return false;
			}
			else if (lt != xpath_type_node_set && rt == xpath_type_node_set)
			{
				xpath_allocator_capture cr(stack.result);

				double l = lhs->eval_number(c, stack);
				xpath_node_set_raw rs = rhs->eval_node_set(c, stack);

				for (const xpath_node* ri = rs.begin(); ri != rs.end(); ++ri)
				{
					xpath_allocator_capture cri(stack.result);

					if (comp(l, convert_string_to_number(string_value(*ri, stack.result).c_str())))
						return true;
				}

				return false;
			}
			else if (lt == xpath_type_node_set && rt != xpath_type_node_set)
			{
				xpath_allocator_capture cr(stack.result);

				xpath_node_set_raw ls = lhs->eval_node_set(c, stack);
				double r = rhs->eval_number(c, stack);

				for (const xpath_node* li = ls.begin(); li != ls.end(); ++li)
				{
					xpath_allocator_capture cri(stack.result);