Panic is now a form, not a function.

src/ludus/base.cljc

@@ -73,12 +73,11 @@
 
 (defn- stringify-args [arglist]
   (apply str (interpose " " (into [] (map print-show) (rest arglist)))))
-
-(def panic! {:name "panic!"
-             ::data/type ::data/clj
-             :body (fn panic-inner
-                     ([] (panic-inner [::data/list])) 
-                     ([args] (throw (ex-info (stringify-args args) {}))))})
+; (def panic! {:name "panic!"
+;              ::data/type ::data/clj
+;              :body (fn panic-inner
+;                      ([] (panic-inner [::data/list])) 
+;                      ([args] (throw (ex-info (stringify-args args) {}))))})
 
 (def print- {:name "print"
              ::data/type ::data/clj
@@ -410,7 +409,7 @@
            :to_vec to_vec
            :fold fold
            :map map
-           :panic! panic!
+           ; :panic! panic!
            :prn prn-
            :concat concat-
            :str str-

src/ludus/grammar.cljc

@@ -234,7 +234,9 @@
 (defp collection flat choice [;struct-literal 
                               dict list-literal set-literal tuple])
 
-(defp simple flat choice [literal collection synthetic recur-call lambda])
+(defp panic group order-1 [(quiet :panic) expression])
+
+(defp simple flat choice [literal collection synthetic recur-call lambda panic])
 
 (defp compound flat choice [match loop-expr if-expr when-expr do-expr block repeat-expr])
 
@@ -268,3 +270,4 @@
 (defp script order-0 [nls?
                       (one+ script-line)
                       (quiet :eof)])
+

src/ludus/interpreter.cljc

@@ -817,11 +817,18 @@
 
 (defn- interpret-literal [ast] (-> ast :data first))
 
+(defn- interpret-panic [ast ctx]
+  (let [msg-value (interpret-ast (:data ast) ctx)
+        msg-string (show/show msg-value)]
+    (throw (ex-info (str "Ludus panicked: " msg-string) {:ast ast}))))
+
 (defn interpret-ast [ast ctx]
   (case (:type ast)
 
     (:nil :true :false :number :string :keyword) (interpret-literal ast)
 
+    :panic! (interpret-panic ast ctx)
+
     :let-expr (interpret-let ast ctx)
 
     :if-expr (interpret-if ast ctx)

src/ludus/node.cljc

@@ -33,9 +33,7 @@
 (defn run [source]
  	(let [user_scanned (s/scan source)
       		user_tokens (:tokens user_scanned)
-        _ (println "Tokens: " user_tokens)
       		user_parsed (p/apply-parser g/script user_tokens)
-        _ (println "Ast: " (i/prettify-ast user_parsed))
       		user_result (i/interpret-safe source user_parsed {})
       		result_str (show/show user_result)
       		post_scanned (s/scan pre/postlude)
@@ -60,3 +58,12 @@
      	)
    	))
 
+(do
+
+  (def source "panic! :oops")
+
+  (def tokens (s/scan source))
+
+  )
+
+

src/ludus/prelude.ld

@@ -276,19 +276,6 @@ fn report! {
 	}
 }
 
-fn panic! {
-	"Causes Ludus to panic, outputting any arguments as messages."
-	() -> {
-		add_msg! ("Ludus panicked!")
-		base :panic! ()
-	}
-	(...args) -> {
-		add_msg! ("Ludus panicked!")
-		add_msg! (args)
-		base :panic! (args)
-	}
-}
-
 fn doc! {
 	"Prints the documentation of a function to the console."
 	(f as :fn) -> do f > base :doc > print!
@@ -396,7 +383,7 @@ fn mult {
 fn div {
 	"Divides numbers. Panics on division by zero."
 	(x as :number) -> x
-	(_, 0) -> panic! ("Division by zero.")
+	(_, 0) -> panic! "Division by zero."
 	(x as :number, y as :number) -> base :div (x, y)
 	(x, y, ...zs) -> {
 		let divisor = fold (mult, zs, y)
@@ -898,8 +885,8 @@ fn err? {
 fn unwrap! {
 	"Takes a result tuple. If it's :ok, then returns the value. If it's not :ok, then it panics. If it's not a result tuple, it also panics."
 	((:ok, value)) -> value
-	((:err, msg)) -> panic! ("Unwrapped :err", msg)
-	(_) -> panic! ("Cannot unwrap something that's not an error tuple.")
+	((:err, msg)) -> panic! string ("Unwrapped :err! ", msg)
+	(_) -> panic! "Cannot unwrap something that's not an error tuple."
 }
 
 fn unwrap_or {
@@ -910,10 +897,10 @@ fn unwrap_or {
 
 fn assert! {
 	"Asserts a condition: returns the value if the value is truthy, panics if the value is falsy. Takes an optional message."
-	(value) -> if value then value else panic! ("Assert failed", value)
+	(value) -> if value then value else panic! string ("Assert failed", value)
 	(value, message) -> if value 
 		then value 
-		else panic! ("Assert failed:", message, value)
+		else panic! string ("Assert failed:", message, value)
 }
 
 &&& Turtle & other graphics
@@ -1217,7 +1204,6 @@ ns prelude {
 	show
 	prn!
 	report!
-	panic!
 	doc!
 	concat
 	ref?

src/ludus/scanner.cljc

@@ -20,7 +20,7 @@
    "match" :match ;; impl
    "nil" :nil ;; impl -> literal word
    "ns" :ns ;; impl
-   ;; "panic!" :panic ;; impl (should be a function)
+   "panic!" :panic ;; impl (should _not_ be a function)
    "recur" :recur ;; impl
    "ref" :ref ;; impl
    "then" :then ;; impl
@@ -329,4 +329,3 @@
         {:tokens (:tokens scanner)
          :errors (:errors scanner)})
       (recur (-> scanner (scan-token) (next-token))))))
-

target/repl-port

@@ -1 +1 @@
-51500
+51828