/// <summary>
/// Interpret ListExpression
/// </summary>
/// <param name="expression">ListExpression to interpret</param>
public override void Visit(ListExpression expression)
{
//Convert list to textvalue
String tempList = "[";
for (int i = 0; i < expression.GetExpressions().Count; i++)
{
Expression currentExpression = (Expression)expression.GetExpressions().Get(i);
//Store Text and SymExpressions between " to see , as real separator
if (currentExpression is TextExpression || currentExpression is SymExpression)
{
tempList += "\"";
}
//Store value in tempList
currentExpression.AcceptVisitor(this);
tempList += TextValue;
if (currentExpression is TextExpression || currentExpression is SymExpression)
{
tempList += "\"";
}
//Add , seperator
if (i != (expression.GetExpressions().Count - 1))
{
tempList += ",";
}
}
tempList += "]";
TextValue = tempList;
}
/// <summary>
/// Interpret FieldExpression
/// </summary>
/// <param name="expression">FieldExpression to interpret</param>
public override void Visit(FieldExpression expression)
{
//Retrieve expression of field
Expression expr = GetExpression(expression);
if (expr != null)
{
expr.AcceptVisitor(this);
}
else
{
TextValue = "undef";
}
}
/// <summary>
/// Interpret VarExpression
/// </summary>
/// <param name="expression">VarExpression to interpret</param>
public override void Visit(VarExpression expression)
{
//Check if variable does exist
String varName = expression.GetVariableIdentifier();
Expression check = SymbolTable.GetVariableDefinition(varName);
//If reference has been made to parent variable with same name, take parent reference
if (check == expression && SymbolTable.GetParentSymbolTable() != null)
{
check = SymbolTable.GetParentSymbolTable().GetVariableDefinition(varName);
}
if (check != null)
{ //Visit variable to retrieve current value
check.AcceptVisitor(this);
}
else
{
TextValue = "undef";
}
}