Ejemplo n.º 1
0
        /// <summary>
        /// Interpret EachStatement
        /// </summary>
        /// <param name="statement">EachStatement to interpret</param>
        public override void Visit(EachStatement statement)
        {
            //If no root element, create one
            if (Root == null)
            {
                XHTMLElement newRoot = new XHTMLElement("html", null, true);
                Root    = newRoot;
                Current = Root;
            }

            Expression expr = statement.GetExpression();

            //Different looping with different expression types
            if (expr is ListExpression)
            {   //Iterate through list
                ListExpression listExpression = (ListExpression)expr;

                //Iterate through list with expression
                XHTMLElement temp = Current;
                foreach (Expression currentExpr in listExpression.GetExpressions())
                {
                    Current = temp;

                    //New scope
                    SymbolTable = new SymbolTable(SymbolTable);

                    //Define variable and interpret statement with this scope
                    SymbolTable.AddVariableDefinition(statement.GetIdentifier(), currentExpr);
                    statement.GetStatement().AcceptVisitor(this);

                    //Return to parent scope
                    SymbolTable = SymbolTable.GetParentSymbolTable();
                }
            }
            else if (expr is FieldExpression)
            {   //Get expression in referenced record
                Expression expression = GetExpression((FieldExpression)expr);

                //Visit each for expression
                EachStatement eachStatement = new EachStatement();
                eachStatement.SetExpression(expression);
                eachStatement.SetStatement(statement.GetStatement());
                eachStatement.SetIdentifier(statement.GetIdentifier());
                Visit(eachStatement);
            }
            else if (expr is VarExpression)
            {   //Get expression of variable
                Expression expression = SymbolTable.GetVariableDefinition(((VarExpression)expr).GetVariableIdentifier());

                //Visit each for expression
                EachStatement eachStatement = new EachStatement();
                eachStatement.SetExpression(expression);
                eachStatement.SetStatement(statement.GetStatement());
                eachStatement.SetIdentifier(statement.GetIdentifier());
                Visit(eachStatement);
            }
        }
Ejemplo n.º 2
0
        /// <summary>
        /// Visit EachStatement
        /// </summary>
        /// <param name="statement">EachStatement to check</param>
        public override void Visit(EachStatement statement)
        {
            CreateChildSymbolTable();

            //Store variable of Each = IdCon : Expression
            SymbolTable.AddVariableDefinition(statement.GetIdentifier(), statement.GetExpression());

            //Visit statement
            statement.GetStatement().AcceptVisitor(this);

            MoveToParentSymbolTable();
        }