public override IEnumerable <ExpressionResult> RunInternal(ExpressionContext context)
{
if (context.GetFunction(Name) is not Expression expression)
{
yield break;
}
var captureName = CaptureName ?? new("!F");
context.CaptureTree.Open(captureName);
context.CaptureTree.Current !.IsFunctionBoundary = true;
context.CallStack.Push(new(Name));
foreach (var result in expression.Run(context))
{
var frame = context.CallStack.Pop();
context.CaptureTree.Close(captureName, result);
yield return(result);
context.CaptureTree.Unclose(captureName);
frame.Ratchet = false;
context.CallStack.Push(frame);
}
context.CallStack.Pop();
context.CaptureTree.Unopen(captureName);
}
/*****************************************************************************/
public object Evaluate(ExpressionContext context)
{
var func = context.ExtensionFunctions.GetFunction(_functionName, _parameters.Count());
if (func != null)
{
return(func.Evaluate(_parameters, context));
}
var tfunc = context.GetFunction(_functionName);
if (tfunc != null)
{
var output = JObject.Parse("{}");
var funcContext = new ExpressionContext(context.Data, context, context.Templates, context.Functions);
var index = 0;
foreach (var argName in tfunc.Parameters)
{
if (index >= _parameters.Count)
{
break;
}
funcContext.SetVariable(argName, _parameters[index++].Evaluate(context));
}
tfunc.Evaluate(output, funcContext);
if (output["return"] != null)
{
return(output["return"]);
}
return(output.ToString().JsonToExpando());
}
throw new Transformer.SyntaxException($"A function with that name and number of parameters was not found : {_functionName}");
}
