private ExpressionNode CBoolExpression() throws SyntaxException {
        try {
            ExpressionNode result = DboolExpression();

            while (iterator.current().type().is(Token.Type.OrderRelation)) {
                BinaryOperationNode.Operation operation = null;
                Position pos = iterator.current().coordinates().starting();
                switch (iterator.current().type()) {
                    case RIGHT_ANGLE_BRACKET:
                        operation = BinaryOperationNode.Operation.GREATER;
                        break;
                    case GREATER_OR_EQUAL:
                        operation = BinaryOperationNode.Operation.GREATER_OR_EQUAL;
                        break;
                    case LEFT_ANGLE_BRACKET:
                        operation = BinaryOperationNode.Operation.LESS;
                        break;
                    case LESS_OR_EQUAL:
                        operation = BinaryOperationNode.Operation.LESS_OR_EUQAL;
                        break;
                    default:
                        return ExpressionNode.InvalidNode(pos);
                }
                nextToken();

                ExpressionNode right = DboolExpression();
                result = new BinaryOperationNode(operation, result, right, pos);
            }

            return result;
        } catch(SyntaxException ex) {
            throw ex;
        } catch(Exception ex) {
            throw (NonAnalysisException)new NonAnalysisException(ex)
                    .initPosition(iterator.current().coordinates().starting())
                    .Log("ru.bmstu.iu9.compiler.syntax");
        }
    }