public void Evaluate(ExpressionInfo expression, ITaskEngine taskEngine, Action <object> callback)
{
TaskInfo taskInfo = (TaskInfo)expression.Value;
ExpressionInfo valueInfo = expression.Children[0];
ExpressionInfo outputInfo = expression.Children.Length > 1 ? expression.Children[1] : null;
if (outputInfo == null)
{
outputInfo = new ExpressionInfo
{
Code = ExpressionCode.Value,
Value = PrimitiveContract.Create(0)
};
}
IExpression valueExpression = taskEngine.GetExpression(valueInfo.Code);
expression.IsEvaluating = true;
valueExpression.Evaluate(valueInfo, taskEngine, value =>
{
expression.IsEvaluating = false;
int outputIndex = ((PrimitiveContract <int>)outputInfo.Value).Value;
taskEngine.Memory.WriteOutput(taskInfo.Parent.TaskId, taskInfo.TaskId, outputIndex, value);
callback(null);
});
}
public void Evaluate(ExpressionInfo expression, ITaskEngine taskEngine, Action <object> callback)
{
if (expression.Value is PrimitiveContract)
{
PrimitiveContract primitive = (PrimitiveContract)expression.Value;
callback(primitive.ValueBase);
}
else if (expression.Value is TaskInputInfo)
{
TaskInputInfo input = (TaskInputInfo)expression.Value;
object value = taskEngine.Memory.ReadOutput(input.Scope.TaskId, input.OutputTask.TaskId, input.OutputIndex);
callback(value);
}
else
{
callback(expression.Value);
}
}