justfile

@@ -1,33 +1,6 @@
-set dotenv-load
+# start a repl
+repl:
+	clj -X:repl
 
-default:
-	@just --list
-
-test:
-	@echo $test
-
-# build clojurescript release
 build:
 	shadow-cljs release module
-
-# open a janet repl in a different os window
-repl:
-	kitten @ launch --type=os-window --allow-remote-control --cwd=current --title=hx_repl:ludus
-	kitten @ send-text -m "title:hx_repl:ludus" "lein repl"
-
-restart:
-	kitten @ send-text -m "title:hx_repl:ludus" "\04"
-	kitten @ send-text -m "title:hx_repl:ludus" "janet -s\n"
-	
-# send what's selected to the repl and evaluate it
-eval:
-	sd "$" "\n" | sd "\n\n" "\n" | kitten @ send-text -m "title:hx_repl:ludus" --stdin
-
-# send what's selected to a buffer, and then evaluate what's in the buffer
-buffer:
-	sd "$" "\n" | sd "\n\n" "\n" > .repl-buffer.janet
-	kitten @ send-text -m "title:hx_repl:ludus" "(import ./.repl-buffer :prefix \"\")"
-
-
-
-

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@ludus/ludus-js-pure",
-  "version": "0.1.1",
+  "version": "0.1.0-alpha.8",
   "description": "A Ludus interpreter in a pure JS function.",
   "main": "target/js/ludus.js",
   "type": "module",

shadow-cljs.edn

@@ -10,7 +10,7 @@
       			:modules {:main {:entries [ludus.node]}}}
   :module {:target :esm
           	:output-dir "target/js"
-          	:modules {:ludus {:exports {run ludus.node/run test ludus.node/doug}}}
+          	:modules {:ludus {:exports {run ludus.node/run test ludus.node/run-test}}}
            }
 		:browser {:target :browser
           		:output-dir "target/js"

src/ludus/interpreter.cljc

@@ -664,21 +664,16 @@
       )
     ))
 
-(def state (atom {})) ;; for now use a global state atom
-
 (defn- interpret-ref [ast ctx]
   (let [data (:data ast)
         name (-> data first :data first) 
         expr (-> data second)]
     (when (contains? @ctx name)
       (throw (ex-info (str "Name " name " is already bound") {:ast ast})))
-    (when (contains? @state name)
-      (throw (ex-info (str "A ref already has " name " name") {:ast ast})))
     (let [value (interpret-ast expr ctx)
           box (atom value)
-          ref {::data/ref true ::data/value box ::data/name name ::data/state state}]
+          ref {::data/ref true ::data/value box ::data/name name}]
       (vswap! ctx update-ctx {name ref})
-      (swap! state assoc name ref)
       ref)))
 
 (defn- interpret-loop [ast ctx]
@@ -817,7 +812,7 @@
                 (resolve-word times-expr ctx)
                 (-> times-expr :data first))
         expr (second data)]
-    (when (not (number? times)) (throw (ex-info (str "Repeat needs a number, not a " (base/get-type times)) {})))
+    (if (not (number? times)) (throw (ex-info (str "Repeat needs a number, not a " (base/get-type times)) {})))
     (dotimes [_ times] (interpret-ast expr ctx))))
 
 (defn- interpret-literal [ast] (-> ast :data first))

src/ludus/node.cljc

@@ -43,7 +43,7 @@
          post_tokens (:tokens post_scanned)
          post_parsed (p/apply-parser g/script post_tokens)
          post_result (i/interpret-safe source post_parsed {} false)
-         ludus_result (assoc post_result :result result_str :test test_results :state @i/state)
+         ludus_result (assoc post_result :result result_str :test test_results)
          clj_result (ld->clj ludus_result)
          ]
      (cond
@@ -62,7 +62,7 @@
      ))
   )
 
-(defn doug [source] (run source true))
+(defn test-run [source] (run source true))
 
 (comment
 

src/ludus/prelude.ld

@@ -136,7 +136,7 @@ fn empty? {
 	"Returns true if something is empty. Otherwise returns false (including for things that can't logically be empty, like numbers)."
 	([]) -> true
 	(#{}) -> true
-	(s as :set) -> eq? (s, ${})
+	(s as :set) -> eq (s, ${})
 	(()) -> true
 	("") -> true
 	(_) -> false
@@ -165,8 +165,6 @@ fn set? {
 	(_) -> false
 }
 
-& add a contains? or has? function
-
 fn fold {
 	"Folds a list."
 	(f as :fn, xs as :list) -> fold (f, xs, f ())
@@ -181,7 +179,7 @@ fn fold {
 }
 
 fn map {
-	"Maps a function over a list: returns a new list with elements that are the result of applying the function to each element in the original list. E.g., `map ([1, 2, 3], inc) &=> [2, 3, 4]`."
+	"Maps over a list."
 	(f as :fn, xs) -> {
 		fn mapper (prev, curr) -> append (prev, f (curr))
 		fold (mapper, xs, [])
@@ -193,7 +191,7 @@ fn map {
 }
 
 fn filter {
-	"Takes a list and a predicate function, and returns a new list with only the items that produce truthy values when the function is called on them. E.g., `filter ([1, 2, 3, 4], odd?) &=> [1, 3]`."
+	"Takes a list and a predicate function, and returns a new list with only the items that produce truthy values when the function is called on them."
 	(p? as :fn, xs) -> {
 		fn filterer (filtered, x) -> if p? (x)
 			then append (filtered, x)
@@ -415,20 +413,10 @@ fn div/safe {
 	}
 }
 
-fn inv {
-	"Returns the inverse of a number: 1/n or `div (1, n)`. Panics on division by zero."
-	(x as :number) -> div (1, x)
-}
-
-fn inv/0 {
-	"Returns the inverse of a number: 1/n or `div/0 (1, n)`. Returns 0 on division by zero."
-	(x as :number) -> div/0 (1, x)
-}
-
 fn abs {
 	"Returns the absolute value of a number."
 	(0) -> 0
-	(n as :number) -> if neg? (n) then mult (-1, n) else n
+	(n) -> if neg? (n) then mult (-1, n) else n
 }
 
 fn neg {
@@ -495,14 +483,6 @@ fn lte? {
 	}
 }
 
-fn between? {
-	"Returns true if a number is in the range [lower, higher): greater than or equal to the lower number, less than the higher."
-	(lower as :number, higher as :number, x as :number) -> and (
-		gte? (x, lower)
-		lt? (x, higher)
-	)
-}
-
 fn neg? {
 	"Returns true if a value is a negative number, otherwise returns false."
 	(x as :number) if lt? (x, 0) -> true
@@ -517,30 +497,16 @@ fn pos? {
 
 fn even? {
 	"Returns true if a value is an even number, otherwise returns false."
-	(x as :number) if eq? (0, mod (x, 2)) -> true
+	(x as :number) if eq (0, mod (x, 2)) -> true
 	(_) -> false
 }
 
 fn odd? {
 	"Returns true if a value is an odd number, otherwise returns false."
-	(x as :number) if eq? (1, mod (x, 2)) -> true
+	(x as :number) if eq (1, mod (x, 2)) -> true
 	(_) -> false
 }
 
-fn min {
-	"Returns the number in its arguments that is closest to negative infinity."
-	(x as :number) -> x
-	(x as :number, y as :number) -> if lt? (x, y) then x else y
-	(x, y, ...zs) -> fold (min, zs, min (x, y)) 
-}
-
-fn max {
-	"Returns the number in its arguments that is closest to positive infinity."
-	(x as :number) -> x
-	(x as :number, y as :number) -> if gt? (x, y) then x else y
-	(x, y, ...zs) -> fold (max, zs, max (x, y))
-}
-
 &&& keywords: funny names
 fn keyword? {
 	"Returns true if a value is a keyword, otherwise returns false."
@@ -624,7 +590,6 @@ fn or {
 
 &&& associative collections: dicts, structs, namespaces
 & TODO?: get_in, update_in, merge
-& TODO?: consider renaming these: put & take, not assoc/dissoc
 fn assoc {
 	"Takes a dict, key, and value, and returns a new dict with the key set to value."
 	() -> #{}
@@ -712,7 +677,6 @@ fn assoc? {
 	(_) -> false
 }
 
-& TODO: consider merging `get` and `at`
 fn get {
 	"Takes a dict or struct, key, and optional default value; returns the value at key. If the value is not found, returns nil or the default value. Returns nil or default if the first argument is not a dict or struct."
 	(key as :keyword) -> get (key, _)
@@ -720,7 +684,6 @@ fn get {
 	(key as :keyword, coll, default) -> base :get (key, coll, default)
 }
 
-& TODO: add sets to this?
 fn has? {
 	"Takes a key and a dict, and returns true if there is a non-`nil` value stored at the key."
 	(key as :keyword) -> has? (key, _)
@@ -728,7 +691,8 @@ fn has? {
 }
 
 fn dict {
-	"Takes an ns, and returns it as a dict. Or, takes a list or tuple of (key, value) tuples and returns it as a dict. Returns dicts unharmed."
+	"Takes a struct or ns, and returns it as a dict. Or, takes a list or tuple of (key, value) tuples and returns it as a dict. Returns dicts unharmed."
+	(struct as :struct) -> base :to_dict (struct)
 	(ns_ as :ns) -> base :to_dict (ns_)
 	(dict as :dict) -> dict
 	(list as :list) -> fold (assoc, list)
@@ -865,25 +829,12 @@ fn dist {
 }
 
 &&& more number functions
+& TODO: add max, min
 fn random {
-	"Returns a random number. With zero arguments, returns a random number between 0 (inclusive) and 1 (exclusive). With one argument, returns a random number between 0 and n. With two arguments, returns a random number between m and n. Alternately, given a list, it returns a random member of that list."
+	"Returns a random number. With zero arguments, returns a random number between 0 (inclusive) and 1 (exclusive). With one argument, returns a random number between 0 and n. With two arguments, returns a random number between m and n."
 	() -> base :random ()
 	(n as :number) -> base :random (n)
 	(m as :number, n as :number) -> add (m, random (n))
-	(l as :list) -> {
-		let i = do l > count > random > floor
-		at (l, i)
-	}
-	(d as :dict) -> {
-		let key = do d > keys > random 
-		get (d, key)
-	}
-}
-
-fn random_int {
-	"Returns a random integer. With one argument, returns a random integer between 0 and that number. With two arguments, returns a random integer between them."
-	(n as :number) -> do n > random > floor
-	(m as :number, n as :number) -> floor (random (m, n))
 }
 
 fn floor {
@@ -902,7 +853,7 @@ fn round {
 }
 
 fn range {
-	"Returns the set of integers between start (inclusive) and end (exclusive) as a list: [start, end). With one argument, starts at 0. If end is less than start, returns an empty list."
+	"Returns the set of integers between start (inclusive) and end (exclusive) as a list. With one argument, starts at 0. If end is less than start, returns an empty list."
 	(end as :number) -> base :range (0, end)
 	(start as :number, end as :number) -> base :range (start, end)
 }
@@ -955,25 +906,15 @@ fn assert! {
 &&& Turtle & other graphics
 
 & some basic colors
-& these are the "basic" css colors
-& https://developer.mozilla.org/en-US/docs/Web/CSS/named-color
+&&& TODO: add colors
 let colors = #{
-	:black (0, 0, 0, 255)
-	:silver (192, 192, 192, 255)
-	:gray (128, 128, 128, 255)
 	:white (255, 255, 255, 255)
-	:maroon (128, 0, 0, 255)
+	:light_gray (150, 150, 150, 255)
+	:dark_gray (50, 50, 50, 255)
 	:red (255, 0, 0, 255)
-	:purple (128, 0, 128, 255)
-	:fuchsia (255, 0, 255, 255)
-	:green (0, 128, 0, 255)
-	:lime (0, 255, 0, 255)
-	:olive (128, 128, 0, 255)
-	:yellow (255, 255, 0, 255)
-	:navy (0, 0, 128, 255)
+	:green (0, 255, 0, 255)
 	:blue (0, 0, 255, 255)
-	:teal (0, 128, 128, 255)
-	:aqua (0, 255, 25, 255)
+	:black (0, 0, 0, 255)
 }
 
 & the initial turtle state
@@ -1045,7 +986,6 @@ fn render_turtle! () -> {
 			add_call! ((:vertex, x2, y2))
 			add_call! ((:vertex, x3, y3))
 			add_call! ((:endShape))
-			& there's a happy bug here: the stroke will be the same width as the pen width. Keep this for now. Consider also showing the pen colour here?
 			add_call! ((:stroke, 0))
 			add_call! ((:line, 0, 0, x1, y1))
 			add_call! ((:pop))
@@ -1279,8 +1219,6 @@ ns prelude {
 	div
 	div/0
 	div/safe
-	inv
-	inv/0
 	angle
 	abs
 	neg
@@ -1293,9 +1231,6 @@ ns prelude {
 	gte?
 	lt?
 	lte?
-	min
-	max
-	between?
 	keyword?
 	nil?
 	some?
@@ -1334,7 +1269,6 @@ ns prelude {
 	sum_of_squares
 	dist
 	random
-	random_int
 	pi
 	tau
 	floor