Add .busted config, seperate interpreter functions from initial setup code for forth machine

.busted

@@ -0,0 +1,4 @@
+package.path =  "?.lua;"..package.path
+
+return {
+}

CoreHelpers.tl

@@ -1,6 +1,6 @@
 local ds = require("DataStructures")
 local Dictionary, Stack, WordInfo, Environment = ds.Dictionary, ds.Stack, ds.WordInfo, ds.Environment
-
+local Pointer = ds.Pointer
 local CoreHelpers = {}
 
 function CoreHelpers.defineWord(dict: Dictionary, str: string, func: function(Environment, ...: any): any..., imm: boolean)
@@ -8,7 +8,10 @@ function CoreHelpers.defineWord(dict: Dictionary, str: string, func: function(En
 	dict:define(str, info)
 end
 
-
+function CoreHelpers.standardInputRefill(): string
+	local input = io.read().."\n"
+	return input
+end
 
 function CoreHelpers.areNumbers(a: any, b: any): boolean
 	return a is number and b is number
@@ -59,5 +62,25 @@ function CoreHelpers.parseToken(state: Environment): string
 	return token
 end
 
+function CoreHelpers.reset(env: Environment)
+	env.instructionPointer.index = 0 -- will get incremented after this instruction
+end
+
+function CoreHelpers.ret(env: Environment)
+	local retAddr = env.returnStack:pop() as Pointer
+	env.instructionPointer = retAddr
+end
+
+function CoreHelpers.makeCall(body: {function(Environment)}): function(Environment)
+	return function(e: Environment)
+		e.returnStack:push(e.instructionPointer)
+		e.instructionPointer = Pointer:new(body, 0)
+	end
+end
+
+
+
+
+
 return CoreHelpers
 

CoreWords.tl

@@ -5,6 +5,8 @@ local areNumbers, getActiveDataStack, isNumber, isWhitespace= helpers.areNumbers
 local skipWhitespace, parseToken = helpers.skipWhitespace, helpers.parseToken
 local popTwoOperands = helpers.popTwoOperands
 local defineWord = helpers.defineWord
+local ret = helpers.ret
+local makeCall = helpers.makeCall
 -- Mathematical operations
 local function add(state: Environment)
   local a, b = popTwoOperands(state)
@@ -189,6 +191,21 @@ CoreWords:define("2DUP", twoDupInfo)
 CoreWords:define("2SWAP", twoSwapInfo)
 CoreWords:define("2OVER", twoOverInfo)
 CoreWords:define("NIP", nipInfo)
+
+
+
+local sqr = {dup, mul, ret}
+local sqrf = makeCall(sqr)
+
+defineWord(CoreWords, "SQR", sqrf, false)
+
+
+
+
+
+
+
+
 return CoreWords
 
 

DataStructures.tl

@@ -22,11 +22,18 @@ local type DataStructures = record
     new: function(WordInfo, function(Environment), boolean): WordInfo
   end
 
-
+  record Pointer
+    index: number
+    referant: {number: any}
+    deref: function(self: Pointer): any
+    inc: function(self: Pointer)
+    new: function(self: Pointer, body: {function(Environment)}, idx: number): Pointer
+  end
 
   record Environment
     dataStacks: {Stack}
     compilerStack: Stack
+    returnStack: Stack
     activeDataStack: Stack
     interrupts: {function(Environment)}
     activeInputStream: InputStream
@@ -36,13 +43,14 @@ local type DataStructures = record
     addDataStack: function(Environment, Stack)
     changeCompilerStack: function(Environment, Stack)
     changeActiveDataStack: function(Environment, number)
-
+    
+    instructionPointer: Pointer
   end
   
 end
 
 local Stack, Environment, Dictionary, WordInfo = DataStructures.Stack, DataStructures.Environment, DataStructures.Dictionary, DataStructures.WordInfo
-
+local Pointer = DataStructures.Pointer
 local wordi_mt = {__index = WordInfo}
 function WordInfo:new(funct: function(Environment, ...: any), imm: boolean): WordInfo
   return setmetatable({func = funct, immediate = imm} as WordInfo, wordi_mt)
@@ -109,6 +117,21 @@ function Dictionary:new(): Dictionary
   return setmetatable({contents = {}} as Dictionary, dict_mt)
 end
 
+function Pointer:deref(): any
+  return self.referant[self.index]
+end
+function Pointer:inc()
+  self.index = self.index + 1
+end
+local pointer_mt = {__index = Pointer}
+function Pointer:new(): Pointer
+  return setmetatable({referant = {}, index = 1} as Pointer, pointer_mt)
+end
+function Pointer:new(body: {function(Environment)}, idx: number): Pointer
+  local tbl = body or {}
+  local jdx = idx or 1
+  return setmetatable({referant = tbl, index = jdx} as Pointer, pointer_mt)
+end
 return DataStructures
 
 

ForthMachine.tl

@@ -3,37 +3,32 @@ local ds = require("DataStructures")
 local istream = require("InputStream")
 local Stack, Dictionary, WordInfo, Environment = ds.Stack, ds.Dictionary, ds.WordInfo, ds.Environment
 local helpers = require("CoreHelpers")
+local interpreters = require("Interpreters")
 local isNumber, skipWhitespace, parseToken = helpers.isNumber, helpers.skipWhitespace, helpers.parseToken
+local reset = helpers.reset
+local Pointer = ds.Pointer
+local standardInputRefill = helpers.standardInputRefill
+local innerInterpreter, outerInterpreter = interpreters.inner, interpreters.outer
+
+
+
 local machineEnvironment = Environment:new()
-
-function standardInputRefill(): string
-	local input = io.read().."\n"
-	return input
-end
-
 local standardInputStream = istream:new(standardInputRefill)
 
 machineEnvironment.activeInputStream = standardInputStream
 machineEnvironment.activeDataStack = Stack:new()
+machineEnvironment.returnStack = Stack:new()
+
 table.insert(machineEnvironment.dictionaries, CoreWords)
 
 
-while(true) do
-	skipWhitespace(machineEnvironment)
-	local token: string = parseToken(machineEnvironment)
-	if isNumber(token) then
-		machineEnvironment.activeDataStack:push(tonumber(token))
-	else
-		for i, dictionary in ipairs(machineEnvironment.dictionaries) do
-			local wordinfo = dictionary:lookup(token)
-			if wordinfo then
-				(wordinfo as WordInfo).func(machineEnvironment)
-				goto continue
-			end
-		end
-		print(string.format('%q ?', token))
-	  ::continue::
-  end
-end
+local interpreterInstructions = {}
+table.insert(interpreterInstructions, outerInterpreter)
+table.insert(interpreterInstructions, reset)
+local startPointer = Pointer:new()
+startPointer.referant = interpreterInstructions
 
+machineEnvironment.instructionPointer = startPointer
+
+innerInterpreter(machineEnvironment)
 

Interpreters.tl

@@ -0,0 +1,38 @@
+local ds = require("DataStructures")
+local Stack, Dictionary, WordInfo, Environment = ds.Stack, ds.Dictionary, ds.WordInfo, ds.Environment
+local helpers = require("CoreHelpers")
+local isNumber, skipWhitespace, parseToken = helpers.isNumber, helpers.skipWhitespace, helpers.parseToken
+
+local type Interpreters = record
+	inner: function(Environment)
+	outer: function(Environment)
+end
+
+
+
+function Interpreters.outer(env: Environment)
+	skipWhitespace(env)
+	local token: string = parseToken(env)
+	if isNumber(token) then
+		env.activeDataStack:push(tonumber(token))
+	else
+		for _, dictionary in ipairs(env.dictionaries) do
+			local wordinfo = dictionary:lookup(token)
+			if wordinfo then
+				(wordinfo as WordInfo).func(env)
+				goto continue
+			end
+		end
+		print(string.format('%q ?', token))
+		::continue::
+	end
+end
+
+function Interpreters.inner(env: Environment)
+	while(true) do
+		env.instructionPointer:deref() as function(Environment)(env)
+		env.instructionPointer:inc()
+	end
+end
+
+return Interpreters