to_number in doc topics

build/ludus.mjs

@@ -15,7 +15,7 @@ export function run (source) {
 
 export function stdout () {
   if (!res) return ""
-  return res.io.console.data
+  return res.io.stdout.data
 }
 
 export function turtle_commands () {
@@ -121,7 +121,7 @@ function command_to_state (prev_state, curr_command) {
     case "pendown": {
       return {...prev_state, pendown: true}
     }
-    case "pendwith": {
+    case "penwidth": {
       const [_, width] = curr_command
       return {...prev_state, penwidth: width}
     }
@@ -134,7 +134,8 @@ function command_to_state (prev_state, curr_command) {
       return {...prev_state, heading: heading}
     }
     case "loadstate": {
-      const [_, x, y, heading, visible, pendown, penwidth, pencolor] = curr_command
+      // console.log("LOADSTATE: ", curr_command)
+      const [_, [x, y], heading, visible, pendown, penwidth, pencolor] = curr_command
       return {position: [x, y], heading, visible, pendown, penwidth, pencolor}
     }
     case "show": {
@@ -192,7 +193,10 @@ const turtle_color = [255, 255, 255, 150]
 
 const p5_call_root = [
   ["background", ...resolve_color(background_color)],
-  ["stroke", ...resolve_color(turtle_init.pencolor)]
+  ["push"],
+  ["rotate", Math.PI],
+  ["scale", -1, 1],
+  ["stroke", ...resolve_color(turtle_init.pencolor)],
 ]
 
 function rotate (vector, heading) {
@@ -265,7 +269,7 @@ function svg_render_turtle (state) {
   const pen_alpha = pa/255
   const ink = pendown ? `<line x1="${x1}" y1="${y1}" x2="0" y2="0" stroke="rgb(${pr} ${pg} ${pb})" stroke-opacity="${pen_alpha}" stroke-width="${penwidth}" />` : ""
   return `
-    <g transform="translate(${x}, ${y})rotate(${turn_to_deg(heading)})">
+    <g transform="translate(${x}, ${y})rotate(${-turn_to_deg(heading)})">
       <polygon points="${x1} ${y1} ${x2} ${y2} ${x3} ${y3}" stroke="none" fill="rgb(${fr} ${fg} ${fb})" fill-opacity="${fill_alpha}"/>
       ${ink}
     </g>
@@ -273,12 +277,14 @@ function svg_render_turtle (state) {
 }
 
 export function svg (commands) {
+  // console.log(commands)
   const states = [turtle_init]
   commands.reduce((prev_state, command) => {
     const new_state = command_to_state(prev_state, command)
     states.push(new_state)
     return new_state
   }, turtle_init)
+  // console.log(states)
   const {maxX, maxY, minX, minY} = states.reduce((accum, {position: [x, y]}) => {
     accum.maxX = Math.max(accum.maxX, x)
     accum.maxY = Math.max(accum.maxY, y)
@@ -324,7 +330,8 @@ function p5_render_turtle (state, calls) {
   const [x2, y2] = rotate(origin, turtle_angle)
   const [x3, y3] = rotate(origin, -turtle_angle)
   calls.push(["translate", x, y])
-  calls.push(["rotate", turn_to_rad(heading)])
+  // need negative turtle rotation with the other p5 translations
+  calls.push(["rotate", -turn_to_rad(heading)])
   calls.push(["noStroke"])
   calls.push(["beginShape"])
   calls.push(["vertex", x1, y1])
@@ -345,6 +352,7 @@ export function p5 (commands) {
     states.push(new_state)
     return new_state
   }, turtle_init)
+  // console.log(states)
   const p5_calls = [...p5_call_root]
   for (let i = 1; i < states.length; ++i) {
     const prev = states[i - 1]
@@ -356,6 +364,7 @@ export function p5 (commands) {
   }
   p5_calls[0] = ["background", ...resolve_color(background_color)]
   p5_render_turtle(states[states.length - 1], p5_calls)
+  p5_calls.push(["pop"])
   return p5_calls
 }
 

build/out.mjs

@@ -6489,7 +6489,7 @@ var __emscripten_stack_alloc = (a0) => (__emscripten_stack_alloc = wasmExports['
 var _emscripten_stack_get_current = () => (_emscripten_stack_get_current = wasmExports['emscripten_stack_get_current'])();
 var ___cxa_is_pointer_type = createExportWrapper('__cxa_is_pointer_type', 1);
 var dynCall_jiji = Module['dynCall_jiji'] = createExportWrapper('dynCall_jiji', 5);
-var ___emscripten_embedded_file_data = Module['___emscripten_embedded_file_data'] = 1816104;
+var ___emscripten_embedded_file_data = Module['___emscripten_embedded_file_data'] = 1819972;
 function invoke_i(index) {
   var sp = stackSave();
   try {

build/p5_test.mjs

@@ -3,13 +3,9 @@ import {run, p5} from "./ludus.mjs"
 const code = `
 print! ("Hello, world!")
 pencolor! (colors :white)
-repeat 10 {
-  repeat 4 {
-    fd! (500)
-    rt! (0.25)
-  }
-  rt! (0.1)
-}`
+fd! (50)
+pw! (3)
+`
 
 const result = run(code)
 

build/svg_test.mjs

@@ -1,15 +1,22 @@
-import {run, svg} from "./ludus.mjs"
+import {run, svg, stdout} from "./ludus.mjs"
 
 const code = `
-pencolor! (colors :white)
-repeat 10 {
-  repeat 4 {
-    fd! (500)
+let start = unbox (turtle_state)
+fd! (100)
 rt! (0.25)
-  }
-  rt! (0.1)
-}`
+fd! (100) 
+
+loadstate! (start)
+& home! ()
+
+rt! (0.25)
+fd! (100)
+lt! (0.25)
+
+`
 
 const result = run(code)
 
+// console.log(stdout(result))
+
 console.log(svg(result.io.turtle.data))

build/svg_test.svg

@@ -1,90 +1,16 @@
 <?xml version="1.0" standalone="no"?>
-<svg version="1.1" xmlns="http://www.w3.org/2000/svg" style="background-color:rgb(0 0 0); background-opacity: 1" viewBox="-866.0173929337993 -866.0173929338016 1676.162696000903 1676.1626960009057">
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" style="background-color:rgb(0 0 0); background-opacity: 1" viewBox="-12 -112 120 120">
 
   <g transform="scale(-1, 1) rotate(180)">
     
-    <line x1="0" y1="0" x2="3.061616997868383e-14" y2="500" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
+    <line x1="0" y1="0" x2="6.123233995736766e-15" y2="100" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
     
-    <line x1="3.061616997868383e-14" y1="500" x2="500.00000000000006" y2="500" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
+    <line x1="6.123233995736766e-15" y1="100" x2="0" y2="0" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
     
-    <line x1="500.00000000000006" y1="500" x2="500.0000000000001" y2="0" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="500.0000000000001" y1="0" x2="1.1368683772161603e-13" y2="-6.123233995736766e-14" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="1.1368683772161603e-13" y1="-6.123233995736766e-14" x2="293.892626146237" y2="404.50849718747344" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="293.892626146237" y1="404.50849718747344" x2="698.4011233337105" y2="110.61587104123663" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="698.4011233337105" y1="110.61587104123663" x2="404.50849718747384" y2="-293.892626146237" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="404.50849718747384" y1="-293.892626146237" x2="2.2737367544323206e-13" y2="-2.8421709430404007e-13" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="2.2737367544323206e-13" y1="-2.8421709430404007e-13" x2="475.5282581475771" y2="154.5084971874731" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="475.5282581475771" y1="154.5084971874731" x2="630.0367553350503" y2="-321.01976096010384" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="630.0367553350503" y1="-321.01976096010384" x2="154.50849718747332" y2="-475.528258147577" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="154.50849718747332" y1="-475.528258147577" x2="-2.842170943040401e-14" y2="-1.1368683772161603e-13" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-2.842170943040401e-14" y1="-1.1368683772161603e-13" x2="475.5282581475765" y2="-154.5084971874746" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="475.5282581475765" y1="-154.5084971874746" x2="321.01976096010196" y2="-630.0367553350511" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="321.01976096010196" y1="-630.0367553350511" x2="-154.50849718747457" y2="-475.5282581475766" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-154.50849718747457" y1="-475.5282581475766" x2="1.1368683772161603e-12" y2="-4.547473508864641e-13" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="1.1368683772161603e-12" y1="-4.547473508864641e-13" x2="293.8926261462368" y2="-404.5084971874748" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="293.8926261462368" y1="-404.5084971874748" x2="-110.61587104123754" y2="-698.4011233337105" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-110.61587104123754" y1="-698.4011233337105" x2="-404.5084971874731" y2="-293.89262614623607" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-404.5084971874731" y1="-293.89262614623607" x2="1.3642420526593924e-12" y2="-5.115907697472721e-13" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="1.3642420526593924e-12" y1="-5.115907697472721e-13" x2="1.3948582226380762e-12" y2="-500.0000000000005" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="1.3948582226380762e-12" y1="-500.0000000000005" x2="-499.9999999999986" y2="-500.00000000000057" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-499.9999999999986" y1="-500.00000000000057" x2="-499.9999999999987" y2="-5.684341886080801e-13" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-499.9999999999987" y1="-5.684341886080801e-13" x2="1.3073986337985843e-12" y2="-5.684341886080801e-13" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="1.3073986337985843e-12" y1="-5.684341886080801e-13" x2="-293.8926261462343" y2="-404.508497187475" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-293.8926261462343" y1="-404.508497187475" x2="-698.4011233337087" y2="-110.61587104123936" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-698.4011233337087" y1="-110.61587104123936" x2="-404.5084971874733" y2="293.8926261462352" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-404.5084971874733" y1="293.8926261462352" x2="1.0800249583553523e-12" y2="-4.547473508864641e-13" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="1.0800249583553523e-12" y1="-4.547473508864641e-13" x2="-475.528258147575" y2="-154.5084971874763" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-475.528258147575" y1="-154.5084971874763" x2="-630.0367553350509" y2="321.0197609600998" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-630.0367553350509" y1="321.0197609600998" x2="-154.50849718747486" y2="475.52825814757574" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-154.50849718747486" y1="475.52825814757574" x2="9.663381206337363e-13" y2="-3.410605131648481e-13" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="9.663381206337363e-13" y1="-3.410605131648481e-13" x2="-475.5282581475769" y2="154.50849718747014" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-475.5282581475769" y1="154.50849718747014" x2="-321.0197609601066" y2="630.0367553350482" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-321.0197609601066" y1="630.0367553350482" x2="154.50849718747122" y2="475.5282581475776" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="154.50849718747122" y1="475.5282581475776" x2="7.105427357601002e-13" y2="-2.2737367544323206e-13" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="7.105427357601002e-13" y1="-2.2737367544323206e-13" x2="-293.89262614623954" y2="404.5084971874708" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="-293.89262614623954" y1="404.5084971874708" x2="110.61587104123151" y2="698.401123333711" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="110.61587104123151" y1="698.401123333711" x2="404.5084971874717" y2="293.8926261462399" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
-    
-    <line x1="404.5084971874717" y1="293.8926261462399" x2="6.252776074688882e-13" y2="-2.8421709430404007e-13" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
+    <line x1="0" y1="0" x2="100" y2="0" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1"/>
     
     
-    <g transform="translate(6.252776074688882e-13, -2.8421709430404007e-13)rotate(359.9999999999994)">
+    <g transform="translate(100, 0)rotate(90)">
       <polygon points="0 20 -13.226237306473037 -15.00222139260919 13.226237306473037 -15.00222139260919" stroke="none" fill="rgb(255 255 255)" fill-opacity="0.5882352941176471"/>
       <line x1="0" y1="20" x2="0" y2="0" stroke="rgb(255 255 255)" stroke-opacity="1" stroke-width="1" />
     </g>
@@ -93,14 +19,19 @@
 
 <ludus>
 
-pencolor! (colors :white)
-repeat 10 {
-  repeat 4 {
-    fd! (500)
+
+let home = unbox (turtle_state)
+
+fd! (100)
+
+loadstate! (home)
+
 rt! (0.25)
-  }
-  rt! (0.1)
-}
+fd! (100)
+
+do turtle_state &gt; unbox
+
+
 </ludus>
 </svg>
   

build/test.svg

@@ -1,18 +0,0 @@
-<?xml version="1.0" standalone="no"?>
-<svg version="1.1" xmlns="http://www.w3.org/2000/svg" style="background-color:navy" viewBox="-100 -100 500 500">
-
-  <rect x="-10.5" y="6.123233995736766e-15" width="300" height="300.2" stroke="white" fill="transparent" stroke-width="1"/>
-
-  <g transform="translate(100, 100) rotate(180) rotate(180)">
-    <polygon points="0 20 -13.2262 -15.0022 13.2262 -15.0022" stroke="none" fill="rgb(150 150 150)" fill-opacity="0.6"/>
-
-    <line x1="0" y1="0" x2="0" y2="20" stroke="white" stroke-width="1"/>
-  </g>
-
-<ludus>
-&amp; this is some code
-forward! (100)
-right! (0.25)
-</ludus>
-</svg>
-

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "@ludus/ludus-js-pure",
-  "version": "0.1.27",
+  "version": "0.1.36",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@ludus/ludus-js-pure",
-      "version": "0.1.27",
+      "version": "0.1.36",
       "license": "GPL-3.0",
       "devDependencies": {
         "shadow-cljs": "^2.26.0",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@ludus/ludus-js-pure",
-  "version": "0.1.27",
+  "version": "0.1.36",
   "description": "A Ludus interpreter in a pure JS function.",
   "type": "module",
   "main": "build/ludus.mjs",

prelude.ld

@@ -279,9 +279,10 @@ fn concat {
 }
 
 fn set {
-	"Takes an ordered collection--list or tuple--and turns it into a set."
+	"Takes an ordered collection--list or tuple--and turns it into a set. Returns sets unharmed."
 	(xs as :list) -> fold (append, xs, ${})
 	(xs as :tuple) -> do xs > list > set
+	(xs as :set) -> xs
 }
 
 fn set? {
@@ -434,6 +435,11 @@ fn sentence {
 	(strs as :list) -> join (strs, " ")
 }
 
+fn to_number {
+	"Takes a string that presumably contains a representation of a number, and tries to give you back the number represented. Returns a result tuple."
+	(num as :string) -> base :to_number (num)
+}
+
 &&& boxes: mutable state and state changes
 
 fn box? {
@@ -978,7 +984,7 @@ fn heading/vector {
 
 &&& more number functions
 fn random {
-	"Returns a random something. 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 collection (list, dict, set), it returns a random member of that collection."
+	"Returns a random something. 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 collection (tuple, list, dict, set), it returns a random member of that collection."
 	() -> base :random ()
 	(n as :number) -> mult (n, random ())
 	(m as :number, n as :number) -> add (m, random (sub (n, m)))
@@ -986,6 +992,10 @@ fn random {
 		let i = do l > count > random > floor
 		at (l, i)
 	}
+	(t as :tuple) -> {
+		let i = do t > count > random > floor
+		at (t, i)
+	}
 	(d as :dict) -> {
 		let key = do d > keys > random 
 		get (key, d)
@@ -1434,6 +1444,7 @@ pkg Prelude {
 	sum_of_squares & math 
 	tan & math
 	tau & math
+	to_number & strings numbers
 	trim & strings
 	tuple? & tuples
 	turn/deg & math

src/base.janet

@@ -1,6 +1,8 @@
 # A base library for Ludus
 # Only loaded in the prelude
 
+(import /src/scanner :as s)
+
 (defn bool [x] (if (= :^nil x) nil x))
 
 (defn ludus/and [& args] (every? (map bool args)))
@@ -248,6 +250,20 @@
     ([e] (break [:err e])))
   [:ok out])
 
+(defn to_number [str]
+  (when (string/find "&" str)
+    (break [:err (string "Could not parse `" str "` as a number")]))
+  (def scanned (s/scan (string/trim str)))
+  (when (< 0 (length (scanned :errors)))
+    (break [:err (string "Could not parse `" str "` as a number")]))
+  (def tokens (scanned :tokens))
+  (when (< 3 (length tokens))
+    (break [:err (string "Could not parse `" str "` as a number")]))
+  (def fst (first tokens))
+  (when (not= :number (fst :type))
+    (break [:err (string "Could not parse `" str "` as a number")]))
+  [:ok (fst :literal)])
+
 (def ctx {
   "add" +
   "and" ludus/and
@@ -304,6 +320,7 @@
   "sub" -
   "tan" math/tan
   "to_list" to_list
+  "to_number" to_number
   "trim" string/trim
   "triml" string/triml
   "trimr" string/trimr
@@ -317,4 +334,4 @@
     (set (b (keyword k)) v))
   b))
 
-
+(to_number "     123  a  ")

src/doc.janet

@@ -12,7 +12,8 @@
 
 (defn escape-punctuation [str] (->> str
  (string/replace "?" "")
- (string/replace "!" "")))
+ (string/replace "!" "")
+ (string/replace "/" "")))
 
 (defn toc-entry [name] 
  (def escaped (escape-underscores name)) 
@@ -22,18 +23,18 @@
  (string/join (map toc-entry sorted-names) "    "))
 
 (def topics {
- "math" ["abs" "add" "angle" "atan/2" "between?" "ceil" "cos" "dec" "deg/rad" "deg/turn" "dist" "div" "div/0" "div/safe" "even?" "floor" "gt?" "gte?" "heading/vector" "inc" "inv" "inv/0" "inv/safe" "lt?" "lte?" "max" "min" "mod" "mod/0" "mod/safe" "mult" "neg" "neg?" "odd?" "pi" "pos?" "rad/deg" "rad/turn" "random" "random_int" "range" "round" "sin" "sqrt" "sqrt/safe" "square" "sub" "sum_of_squares" "tan" "tau" "turn/deg" "turn/rad" "zero?"]
+ "math" ["abs" "add" "angle" "atan/2" "between?" "ceil" "cos" "dec" "deg/rad" "deg/turn" "dist" "div" "div/0" "div/safe" "even?" "floor" "gt?" "gte?" "heading/vector" "inc" "inv" "inv/0" "inv/safe" "lt?" "lte?" "max" "min" "mod" "mod/0" "mod/safe" "mult" "neg" "neg?" "odd?" "pi" "pos?" "rad/deg" "rad/turn" "random" "random_int" "range" "round" "sin" "sqrt" "sqrt/safe" "square" "sub" "sum_of_squares" "tan" "tau" "to_number" "turn/deg" "turn/rad" "zero?"]
  "boolean" ["and" "bool" "bool?" "false?" "not" "or" "true?"]
  "dicts" ["any?" "assoc" "assoc?" "coll?" "count" "dict" "dict?" "diff" "dissoc" "empty?" "get" "keys" "random" "update" "values"]
  "lists" ["any?" "append" "at" "butlast" "coll?" "concat" "count" "each!" "empty?" "filter" "first" "fold" "join" "keep" "last" "list" "list?" "map" "ordered?" "random" "range" "rest" "second" "sentence" "slice"]
  "sets" ["any?" "append" "coll?" "concat" "contains?" "count" "empty?" "omit" "random" "set" "set?"]
  "tuples" ["any?" "at" "coll?" "count" "empty?" "first" "last" "ordered?" "rest" "second" "tuple?"]
- "strings" ["any?" "chars" "chars/safe" "concat" "count" "downcase" "empty?" "join" "sentence" "show" "slice" "split" "string" "string?" "strip" "trim" "upcase" "words"]
+ "strings" ["any?" "chars" "chars/safe" "concat" "count" "downcase" "empty?" "join" "sentence" "show" "slice" "split" "string" "string?" "strip" "to_number" "trim" "upcase" "words"]
  "types and values" ["assoc?" "bool?" "box?" "coll?" "dict?" "eq?" "fn?" "keyword?" "list?" "neq?" "nil?" "number?" "ordered?" "set?" "show" "some" "some?" "string?" "tuple?" "type"]
  "boxes and state" ["box?" "unbox" "store!" "update!"]
  "results" ["err" "err?" "ok" "ok?" "unwrap!" "unwrap_or"]
  "errors" ["assert!"]
- "turtle graphics" ["back!" "background!" "bk!" "clear!" "colors" "fd!" "forward!" "goto!" "heading" "heading/vector" "home!" "left!" "lt!" "pc!" "pd!" "pencolor" "pencolor!" "pendown!" "pendown?" "penup!" "penwidth" "penwidth!" "position" "pu!" "pw!" "render_turtle!" "reset_turtle!" "right!" "rt!" "turtle_state"]
+ "turtle graphics" ["back!" "background!" "bk!" "clear!" "colors" "fd!" "forward!" "goto!" "heading" "heading/vector" "hideturtle!" "home!" "left!" "loadstate!" "lt!" "pc!" "pd!" "pencolor" "pencolor!" "pendown!" "pendown?" "penup!" "penwidth" "penwidth!" "position" "pu!" "pw!" "render_turtle!" "reset_turtle!" "right!" "rt!" "setheading!" "showturtle!" "turtle_state"]
  "environment and i/o" ["doc!" "print!" "report!" "state"]
  })
 

src/scanner.janet

@@ -349,8 +349,7 @@
       (recur (-> scanner (scan-token) (next-token)))))
   (recur (new-scanner source input)))
 
-(comment
-# (do
-  (def source "add 1 2 () four")
-  (scan source)
-)
+# (comment
+(do
+  (def source "    -123  ")
+  (length ((scan source) :tokens)))