initial try

src/main/jastadd/Robot.relast

+Tidy ::= MoveObjectToCorrectPlace* EmptyTable;
+MoveObjectToCorrectPlace<object> ::= ObjectAtWrongPlace/*provides object*/ PickUpObject/*uses object*/ DropObjectAtRightPlace/*uses object*/;
+PickUpObject/*requires object*/ ::= RobotIsReadyToPick Pick/*uses object*/
+abstract RobotIsReadyToPick;
+RobotIsReallyReadyToPick : RobotIsReadyToPick ::= RobotIsFree;
+RobotIsNotReadyToPick    : RobotIsReadyToPick ::= RobotIsBusy Wait/*uses const "1sec"*/ RobotIsReadyToPick;
+DropObjectAtRightPlace/*requires object*/ ::= RightPlace/*uses object, provides place*/ Drop/*requires place*/;
+
+// Tokens
+EmptyTable                    : Token;
+ObjectAtWrongPlace            : Token ::= <Object:String>; // the Object is a variable of the token
+Pick/*requires object*/       : Token;
+RobotIsFree                   : Token ::= RobotIsIdle RobotHasNoItemAttached; // combined token. both individual tokens are parsed in parallel
+RobotIsIdle                   : Token;
+RobotHasNoItemAttached        : Token;
+Wait/*requires time*/         : Token; // artificial token, which parsing takes a specified amount of time
+RightPlace/*requires object*/ : Token ::= <Place:String>;
+Drop/*requires object*/       : Token;
+
+