internal bool TryValidate(Store sto, Func <Item> getItem)
{
bool result = true;
if (StepType == StepType.Property && Evaluate is LiteralParse e)
{
if (sto.TryLookUpProperty(e.Text, out Property property))
{
StepType = StepType.Property;
Evaluate = new LiteralProperty(this, property, getItem);
}
else
{
Error = StepError.UnknownProperty;
return(false);
}
}
else if (Input != null)
{
foreach (var step in Input)
{
result &= step.TryValidate(sto, getItem); // recursive depth-first traversal
}
}
return(result);
}
private static void AppendText(StepType type, EvaluateStep eval, StringBuilder sb)
{
if (eval.ValType == ValType.IsUnresolved)
{
sb.Append(_defaultText.TryGetValue(type, out string txt) ? txt : " ?? ");
}
else
{
sb.Append(eval.Text);
}
}
internal ComputeStep(StepType stepType)
{
StepType = stepType;
Evaluate = Value.LiteralUnresolved;
}
private StepState _flags2; // used by TryResolve()
#region Constructor ==================================================
internal ComputeStep(LiteralParse evaluate)
{
StepType = StepType.Parse;
Evaluate = evaluate;
}