.gitignore

@@ -28,4 +28,3 @@ node_modules/
 .shadow-cljs
 .cljs_node_repl/
 .helix/
-target/repl-port

src/ludus/base.cljc

@@ -73,11 +73,12 @@
 
 (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
@@ -409,7 +410,7 @@
            :to_vec to_vec
            :fold fold
            :map map
-           ; :panic! panic!
+           :panic! panic!
            :prn prn-
            :concat concat-
            :str str-

src/ludus/error.cljc

@@ -1,7 +1,7 @@
 (ns ludus.error
  	(:require [clojure.string :as string]))
 
-(defn get-line [source line]
+(defn get-line [source {:keys [line]}]
  	(let [lines (string/split-lines source)
      			the_line (nth lines (dec line))]
  			the_line))
@@ -21,26 +21,22 @@
 
 (defn scan-error [] :TODO)
 
-(defn parse-error [{:keys [trace token]}]
- 	(let [source (:source token)
-     			input (:input token)
-     			line-num (:line token)
-     			line (get-line source line-num)
+(defn parse-error [source {:keys [trace token]}]
+ 	(let [line (get-line source token)
       		line-num (:line token)
       		prefix (str line-num ": ")
       		underline (get-underline source token (count prefix))
       		expected (first trace)
       		got (:type token)
-      		message (str "Ludus found a parsing error on line " line-num " in " input ".\nExpected: " expected "\nGot: " got "\n")
+      		message (str "Ludus found a parsing error on line " line-num ".\nExpected: " expected "\nGot: " got "\n")
       		]
   		(str message "\n" prefix line "\n" underline)
   		)
  	)
 
-(defn run-error [{:keys [message token line]}]
- 	(let [source (:source token) input (:input token)]
-   	(if line
-    		(str "Ludus panicked!: " message "\nOn line " line " in " input "\n" (get-line source line))
-    		(str "Ludus panicked!\n" message)
-    		)))
+(defn run-error [source {:keys [line message]}]
+ 	(if line
+  		(str "Ludus panicked on line " line ":\n" (get-line source {:line line}) "\n" message)
+  		(str "Ludus panicked!\n" message)
+  		))
 

src/ludus/grammar.cljc

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

src/ludus/interpreter.cljc

@@ -817,18 +817,11 @@
 
 (defn- interpret-literal [ast] (-> ast :data first))
 
-(defn- interpret-panic [ast ctx]
-  (let [msg-value (interpret-ast (-> ast :data first) ctx)
-        msg-string (show/show msg-value)]
-    (throw (ex-info 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)
@@ -893,7 +886,7 @@
     ; :struct-literal
     ; (interpret-struct ast ctx)
 
-    (throw (ex-info (str "Unknown AST node type " (get ast :type :none) " on line " (get-in ast [:token :line])) {:ast ast}))))
+    (throw (ex-info (str "Unknown AST node type " (get ast :type :err) " on line " (get-in ast [:token :line])) {:ast ast}))))
 
 (defn get-line [source line]
   (if line
@@ -915,11 +908,11 @@
   (into {} (map-keys kw->str) ns))
 
 (def ludus-prelude 
-  (let [scanned (scanner/scan prelude/prelude "prelude")
+  (let [scanned (scanner/scan prelude/prelude)
         parsed (p/apply-parser g/script (:tokens scanned))
         ; _ (println "Parse status: " (:status parsed))
         ; _ (if (= :err (:status parsed))
-        ;     (throw (ex-info (error/parse-error parsed) {})))
+        ;     (throw (ex-info (error/parse-error prelude/prelude parsed) {})))
         base-ctx (volatile! {::parent (volatile! {"base" base/base})})
         interpreted (interpret-ast parsed base-ctx)
         namespace (dissoc interpreted ::data/type ::data/name ::data/struct)
@@ -980,22 +973,10 @@
         ;(pp/pprint (ex-data e))
         ;(throw e)
         {::data/error true 
-         :token (get-in (ex-data e) [:ast :token])
          :line (get-in (ex-data e) [:ast :token :line])
          :message (ex-message e)}
         ))))
 
-; No prelude; helps when there are errors in the prelude
-(defn interpret-bare [source parsed ctx]
-  (let [base-ctx (volatile! {::parent (volatile! ctx)})]
-    (try
-      (interpret-ast parsed base-ctx)
-      (catch Throwable e
-        {::data/error true
-         :token (get-in (ex-data e) [:ast :token])
-         :line (get-in (ex-data e) [:ast :token :line])
-         :message (ex-message e)}))))
-
 
 ;; repl
 (comment
@@ -1003,18 +984,17 @@
   (println "***********")
 
   (def source "
-    panic! (:oh, :no)
+    let times = 1.3
+    repeat times { print! (:foo) }
 ")
 
-  (def tokens (-> source (scanner/scan "test input") :tokens))
+  (def tokens (-> source scanner/scan :tokens))
 
   (def ast (p/apply-parser g/script tokens))
 
-  (def result (interpret-bare source ast {}))
+  (def result (interpret-safe source ast {}))
 
-  (println tokens)
-
-  (-> ast prettify-ast println)
+  ;(-> ast prettify-ast println)
 
   (println result)  
 

src/ludus/node.cljc

@@ -31,12 +31,14 @@
  	#?(:clj value :cljs (clj->js value)))
 
 (defn run [source]
- 	(let [user_scanned (s/scan source "user input")
+ 	(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 "postlude")
+      		post_scanned (s/scan pre/postlude)
       		post_tokens (:tokens post_scanned)
       		post_parsed (p/apply-parser g/script post_tokens)
       		post_result (i/interpret-safe source post_parsed {})
@@ -48,24 +50,13 @@
      	(clean-out {:errors (:errors user_tokens)})
 
      	(= :err (:status user_parsed))
-     	(clean-out {:errors [(error/parse-error user_parsed)]})
+     	(clean-out {:errors [(error/parse-error source user_parsed)]})
 
      	(::data/error user_result)
-     	(clean-out (assoc (ld->clj post_result) :errors [(error/run-error user_result)]))
+     	(clean-out (assoc (ld->clj post_result) :errors [(error/run-error source user_result)]))
 
      	:else
      	(clean-out clj_result)
      	)
    	))
 
-(comment
-  (def source "
-
-    a b c
-
-    ")
-
-  (-> source run :errors println)
-  )
-
-

src/ludus/prelude.ld

@@ -276,6 +276,19 @@ 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!
@@ -383,7 +396,7 @@ 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)
@@ -885,8 +898,8 @@ 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! string ("Unwrapped :err! ", msg)
-	(_) -> panic! "Cannot unwrap something that's not an error tuple."
+	((:err, msg)) -> panic! ("Unwrapped :err", msg)
+	(_) -> panic! ("Cannot unwrap something that's not an error tuple.")
 }
 
 fn unwrap_or {
@@ -897,10 +910,10 @@ 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! string ("Assert failed:", value)
-	(msg, value) -> if value 
+	(value) -> if value then value else panic! ("Assert failed", value)
+	(value, message) -> if value 
 		then value 
-		else panic! string ("Assert failed: ", msg, " with ", value)
+		else panic! ("Assert failed:", message, value)
 }
 
 &&& Turtle & other graphics
@@ -1204,6 +1217,7 @@ 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 _not_ be a function)
+   ;; "panic!" :panic ;; impl (should be a function)
    "recur" :recur ;; impl
    "ref" :ref ;; impl
    "then" :then ;; impl
@@ -51,9 +51,8 @@
 
 (defn- new-scanner
   "Creates a new scanner."
-  [source input]
+  [source]
   {:source source
-   :input input
    :length (count source)
    :errors []
    :start 0
@@ -136,9 +135,7 @@
        (current-lexeme scanner)
        literal
        (:line scanner)
-       (:start scanner)
-       (:source scanner)
-       (:input scanner)))))
+       (:start scanner)))))
 
 ;; TODO: errors should also be in the vector of tokens
 ;; The goal is to be able to be able to hand this to an LSP?
@@ -149,9 +146,7 @@
                 (current-lexeme scanner)
                 nil
                 (:line scanner)
-                (:start scanner)
-                (:source scanner)
-                (:input scanner))
+                (:start scanner))
         err-token (assoc token :message msg)]
     (-> scanner
       (update :errors conj err-token)
@@ -245,7 +240,7 @@
          comm (str char)]
     (let [char (current-char scanner)]
       (if (= \newline char)
-        scanner
+        (update scanner :line inc)
         (recur (advance scanner) (str comm char))))))
 
 (defn- scan-token [scanner]
@@ -327,10 +322,11 @@
 (defn- next-token [scanner]
   (assoc scanner :start (:current scanner)))
 
-(defn scan [source input]
-  (loop [scanner (new-scanner source input)]
+(defn scan [source]
+  (loop [scanner (new-scanner source)]
     (if (at-end? scanner)
       (let [scanner (add-token (add-token scanner :break) :eof)]
         {:tokens (:tokens scanner)
          :errors (:errors scanner)})
       (recur (-> scanner (scan-token) (next-token))))))
+

src/ludus/token.cljc

@@ -1,11 +1,9 @@
 (ns ludus.token)
 
 (defn token
-  [type text literal line start source input]
+  [type text literal line start]
   {:type type
    :lexeme text
    :literal literal
    :line line
-   :source source
-   :input input
    :start start})

target/repl-port

@@ -0,0 +1 @@
+51500