Slightly tweak the engine thingy

dialogue.lisp

@@ -213,19 +213,20 @@ Returns the state for use with STATE-LOOP, pay attention!"
       ((or (and did-press-enter-p did-finish-printing-p did-finish-moving-p)
            (and (not text) did-finish-moving-p))
        (if (cdr dialogue-list)
-          (list :dialogue (cdr dialogue-list) :map map)
+          (list :parameters (list :dialogue (cdr dialogue-list) :map map))
           (progn
             (✎:hide-cursor)
-            (values (or (getf dialogue :return) nil)
+            (list :drop 1
-                    (or (getf dialogue :return-2)
+                  :function (getf dialogue :function)
+                  :parameters (or (getf dialogue :parameters)
                                   (list :map map))))))
       ;; Allow interupting text-printing to end it!
       ((and did-press-enter-p (not did-finish-printing-p))
        (setf (getf (car dialogue-list) :progress) (length text))
-       (list :dialogue dialogue-list :map map))
+       (list :parameters (list :dialogue dialogue-list :map map)))
       ;; If no input, keep steady!
       ('t
-       (list :dialogue dialogue-list :map map)))))
+       (list :parameters (list :dialogue dialogue-list :map map))))))
 
 
 
@@ -394,9 +395,10 @@ A state-function for use with STATE-LOOP."
 
 (defun make-dialogue-state (map dialogue-list)
   "Return a state-function for a section of dialogue, for use with STATE-LOOP."
+  (list :function
         (lambda (matrix &key (map map) (dialogue dialogue-list))
           (🌍:overworld-state-draw matrix map)
-    (dialogue-state matrix :map map :dialogue dialogue)))
+          (dialogue-state matrix :map map :dialogue dialogue))))
 
 
 ;; Split a banana in two, bisection-fruit,

engine.lisp

@@ -31,31 +31,31 @@ to the terminal.
 What the state-function returns is pretty important, having different repercussions:
   * NIL       —  The function is removed from STATES, and so the next function in STATES will start
                  getting executed instead.
-  * NIL; List —  The function is popped off STATES and the list is used as the new parameters for
+  * T         —  The function will continue to be run with the same parameters.
-                 the next function in STATES.
+  * (:FUNCTION FUNCTION :PARAMETERS LIST :DROP NUMBER)
-  * Function  —  The function is pushed to the front of STATES, and so is executed instead of the
-                 current function.
-  * List      —  The current function (front of STATES) continues to be executed with the given
-                 list as a parameters list.
 Make note to add a delay w SLEEP to your state functions, or… well, y’know. Your computer will
 overheat, or something ¯\_(ツ)_/¯"
   (when states
-    (multiple-value-bind (state-result new-state-params)
+    (let ((state-result
-        (apply (car states) (cons matrix state-params)) ;; Run the latest-added update/draw loop
+            (apply (car states) (cons matrix state-params)))) ;; Run the last-added state-loop.
       (✎:print-screen-matrix (✎:matrix-delta last-matrix matrix)) ;; Print its results.
+      (format *error-output* "~S~%" state-result)
       (force-output)
       (state-loop
-          (cond ((functionp state-result)
+       (cond ((listp state-result)
-                 (cons state-result states))
+              (nconc (if (getf state-result :function)
+                         (list (getf state-result :function)))
+                     (nthcdr (or (getf state-result :drop) 0) states)))
              ((not state-result)
               (cdr states))
              ('t states))
-          :last-matrix matrix
        :state-params
-          (cond ((not state-result)
+       (cond ((listp state-result)
-                 new-state-params)
+              (getf state-result :parameters))
-                ((listp state-result)
+             ((not state-result)
-                 state-result))))))
+              nil)
+             ('t state-params))
+       :last-matrix matrix))))
 
 
 (defun main (states)

flora-search-aurora.lisp

@@ -129,7 +129,8 @@ Useful for making barriers the player character refuses to traverse."
 (defun entrance-trigger (map trigger-plist)
   "A trigger that can be used to move the user from one MAP to another, via the
 :MAP property in a trigger’s Tiled entity."
-  (list :map (🌍:merge-maps map (symbol-value (read-from-string (getf trigger-plist :map))))))
+  (list :parameters
+        (list :map (🌍:merge-maps map (symbol-value (read-from-string (getf trigger-plist :map)))))))
 
 
 
@@ -365,7 +366,7 @@ avoid triggering this."
     (say    'player :eo "Vi teruras, Saŝa."
                     :en "You're the worst, Sasha.")
     (move   'player '(:x 51 :y 19))
-    `((:return-2 ,(list :map (merge-maps map *casino-map*)))))))
+    `((:parameters ,(list :map (merge-maps map *casino-map*)))))))
 
 
 
@@ -615,7 +616,7 @@ avoid triggering this."
    (say 'flashback-casino-dealer
         :eo "Nu, ĉiu krom li, metu viajn vetaĵojn. Ni komencos je la Nula Epoko!"
         :en "As for the rest of you, place your bets. It's time for the Zeroth Era!")
-   `((:return-2 ,(list :map (merge-maps map *outdoors-map*))))))
+   `((:parameters ,(list :map (merge-maps map *outdoors-map*))))))
 
 
 (defun flashback-casino-dialogue (map)
@@ -638,18 +639,18 @@ avoid triggering this."
   `((:en "IDK"
      :selection 100 :selected t)
     (:en "GO BACK"
-     :return nil)))
+     :drop 1)))
 
 
 (defun main-menu ()
   `((:en "PLAY" :eo "EKLUDI"
      :selection 100 :selected t
-     :return ,(🌍:make-overworld-state *outdoors-map*))
+     :function ,(🌍:make-overworld-state *outdoors-map*))
     (:en "SUBMENU" :eo "SUBMENUO" :row 1
-     :return ,(📋:make-menu-state (submenu)))
+     :function ,(📋:make-menu-state (submenu)))
     (:en "TERURE" :eo "BADLY" :row 1)
     (:en "QUIT" :eo "REZIGNI" :row 2
-     :return nil)))
+     :drop 1)))
 
 
 

menu.lisp

@@ -145,6 +145,7 @@ That is, 0 for non-selected items and 100 for selected items."
              (selected-item (nth (selected-menu-item-position menu-plist)
                                  menu-plist))
              (func (getf selected-item :function))
+             (exec (getf selected-item :exec))
              (return-val-p (member :return selected-item))
              (return-val (getf selected-item :return)))
         (case (getf input :semantic)
@@ -171,16 +172,9 @@ That is, 0 for non-selected items and 100 for selected items."
           ('⌨:❎
            nil)
           ('⌨:🆗
-           (cond ((and func return-val-p)
+           (if (getf selected-item :exec)
-                  (apply func '())
+               (apply (getf selected-item :exec) '())
-                  return-val)
+               selected-item))))
-                 (func
-                  (apply func '()))
-                 (return-val-p
-                  return-val)
-                 ('t
-                  't)))
-          (otherwise 't)))
       't))
 
 

overworld.lisp

@@ -210,9 +210,9 @@ Returns parameters to be used in the next invocation of OVERWORLD-STATE."
                   (interaction (getf (cdr interactee) :interact)))
              (if interaction
                  (apply (string->symbol interaction) (list map interactee-id))
-                 (list :map map))))
+                 (list :parameters (list :map map)))))
           ('⌨:❎
-           (🎒:make-inventory-state map))
+           (list :function (🎒:make-inventory-state map)))
           ;; Simple up-down-left-right movements
           ('⌨:→
            (move-player map :Δx 1))
@@ -231,8 +231,8 @@ Returns parameters to be used in the next invocation of OVERWORLD-STATE."
           ('⌨:↳
            (move-player map :Δx 1 :Δy 1))
           (otherwise
-           (list :map map))))
+           (list :parameters (list :map map)))))
-      (list :map map)))
+      (list :parameters (list :map map))))
 
 
 (defun move-player (map &key (Δx 0) (Δy 0))
@@ -244,7 +244,7 @@ Very kindly removes a list of parameters to be returned by the overworld state-f
     (if (and trigger (getf trigger :function))
         (apply (string->symbol (getf trigger :function))
                (list map trigger))
-        (list :map map))))
+        (list :parameters (list :map map)))))
 
 
 (defun move-entity (map entity-id &key (Δx 0) (Δy 0))