/// <summary>
/// This function will return true if it doesn't encounter any problems.
/// </summary>
/// <param name="node"></param>
/// <param name="logErrors"></param>
/// <returns></returns>
public bool Analyse(Node node)
{
var result = true;
string id = "";
QValueType type = QValueType.UNKNOWN;
if (node.Type == NodeType.QUESTION)
{
var questionNode = (QuestionNode)node;
id = questionNode.ID;
type = questionNode.ValueType;
return(AddVariable(id, type));
}
else if (node.Type == NodeType.COMPUTED)
{
var computedNode = (ComputedNode)node;
id = computedNode.ID;
type = computedNode.ValueType;
return(AddVariable(id, type));
}
// Set result to false if any of the children encounters an error.
foreach (Node child in node.Children)
{
if (!Analyse(child) && result)
{
result = false;
}
}
return(result);
}
public ComputedNode(Location location, string id, string text, QValueType valueType, IExpressionNode expression) : base(location, NodeType.COMPUTED)
{
this.ID = id;
this.Text = text;
this.ValueType = valueType;
this.Expression = expression;
}
/// <summary>
/// This function adds a variable to the SymbolTable. In case of an error a message will
/// be added to the analyser.
/// </summary>
/// <param name="id"></param>
/// <param name="type"></param>
public static bool Add(string id, QValueType type)
{
if (!Instance.TypeMap.ContainsKey(id))
{
Instance.TypeMap.Add(id, type);
return(true);
}
return(false);
}
public bool AddVariable(string id, QValueType type)
{
if (!SymbolTable.Add(id, type))
{
Analyser.AddMessage(string.Format("Duplicate identifier {0} {1}", id, type), MessageType.ERROR);
return(false);
}
return(true);
}
private bool AddVariable(string id, QValueType type)
{
VisitedIDs.Add(id);
if (!SymbolTable.Add(id, type))
{
Analyser.AddMessage(string.Format("Duplicate identifier {0} {1}", id, type), Language.QL, MessageType.ERROR);
return(false);
}
return(true);
}
public QLSStyle(QValueType type, QLSWidgetSpecification specification) : this(type)
{
this.WidgetSpecification = specification;
}
public QLSStyle(QValueType type) : this()
{
this.QValueType = type;
}
public QuestionNode(Location location, string id, string text, QValueType questionType) : base(location, NodeType.Question)
{
this.ID = id;
this.Text = text;
this.ValueType = questionType;
}
public LiteralNode(Location location, string value, QValueType qValueType) : base(location, NodeType.LITERAL)
{
this.Value = value;
this.QValueType = qValueType;
}
public QLSValue(string property, string value, QValueType qValueType)
{
this.StyleProperty = property;
this.StyleValue = value;
this.QValueType = qValueType;
}
