public ITerminalWrapper GetValue(ElementBase key)
{
if (key is IResolvable) return GetValue(key as IResolvable);
// fallback in case we've requested the value of a variable directly
return GetValue((Identifier)key);
}
public ITerminalWrapper GetValueOrNull(ElementBase key)
{
try
{
return GetValue(key);
}
catch (QLError)
{
return null;
}
}
public void Visit(ElementBase elementBase)
{
Exceptions.Add(new QLError(string.Format("Type checker was called for {0} but is not implemented", elementBase.GetType().Name)));
}
/// <summary>
/// This method has a signature with the highest class in the hierarchy and will act as a fallback
/// </summary>
public void Visit(ElementBase elementBase)
{
Debug.Assert(false, "GUI Visitor did not expect an ElementBase fallback");
}
public void Visit(ElementBase node)
{
throw new QLError("Not implemented type to evaluate: " + node.GetType());
}
public void Visit(ElementBase elementBase)
{
throw new QLError("Exporter attemted to export an ElementBase which is not allowed", elementBase.SourceLocation);
}
public QLWarning(string message, ElementBase source)
: base(message, source)
{
}
public QLBaseException(string message, ElementBase source)
: base(message)
{
SourceLocation = source.SourceLocation;
}
public QLError(string message, ElementBase source)
: base(message, source)
{
}
public TypeCheckerError(string message, ElementBase source)
: base(message)
{
SourceLocation = source.SourceLocation;
}
private void AppendToAST(ElementBase newChild)
{
if (_childrenStack.Any())
{
Queue<ElementBase> siblings = _childrenStack.Peek();
siblings.Enqueue(newChild);
}
else
{
//this is the last one, it should be Form
_astRootNode = (Form)newChild;
}
}
