Made a UI for results, BAPFS - Lecture 4, 5, and 6 done.

Editor/Assets/Branding/RDP_Class_cover_small.png.import

@@ -2,15 +2,15 @@
 
 importer="texture"
 type="StreamTexture"
-path="res://.import/RDP_Class_cover_small.png-51d9e4e36c8441da2486970409e2a06b.stex"
+path="res://.import/RDP_Class_cover_small.png-ab70c489e9b3c0feb8bbeb581c2176f1.stex"
 metadata={
 "vram_texture": false
 }
 
 [deps]
 
-source_file="res://Branding/RDP_Class_cover_small.png"
+source_file="res://Assets/Branding/RDP_Class_cover_small.png"
-dest_files=[ "res://.import/RDP_Class_cover_small.png-51d9e4e36c8441da2486970409e2a06b.stex" ]
+dest_files=[ "res://.import/RDP_Class_cover_small.png-ab70c489e9b3c0feb8bbeb581c2176f1.stex" ]
 
 [params]
 

Editor/Assets/Fonts/DF_RecMonoSemiCasul.tres

@@ -0,0 +1,9 @@
+[gd_resource type="DynamicFont" load_steps=2 format=2]
+
+[sub_resource type="DynamicFontData" id=1]
+font_path = "res://Assets/Fonts/RecMonoSemicasual-Regular-1.084.ttf"
+
+[resource]
+size = 14
+use_mipmaps = true
+font_data = SubResource( 1 )

Editor/Assets/Styles/Editor.SytleBoxFlat.tres

@@ -0,0 +1,4 @@
+[gd_resource type="StyleBoxFlat" format=2]
+
+[resource]
+bg_color = Color( 0.0941176, 0.0666667, 0.137255, 1 )

Editor/Assets/Styles/EditorTheme.tres

@@ -0,0 +1,11 @@
+[gd_resource type="Theme" load_steps=3 format=2]
+
+[ext_resource path="res://Assets/Styles/Editor.SytleBoxFlat.tres" type="StyleBox" id=1]
+[ext_resource path="res://Assets/Fonts/DF_RecMonoSemiCasul.tres" type="DynamicFont" id=2]
+
+[resource]
+TextEdit/colors/font_color = Color( 1, 1, 1, 1 )
+TextEdit/colors/font_color_readonly = Color( 1, 1, 1, 1 )
+TextEdit/fonts/font = ExtResource( 2 )
+TextEdit/styles/normal = ExtResource( 1 )
+TextEdit/styles/read_only = ExtResource( 1 )

Editor/Lecture.1.tscn

@@ -1,6 +0,0 @@
-[gd_scene load_steps=2 format=2]
-
-[ext_resource path="res://Lecture.1.gd" type="Script" id=1]
-
-[node name="Test" type="Node2D"]
-script = ExtResource( 1 )

Editor/Lecture.2.tscn

@@ -1,6 +0,0 @@
-[gd_scene load_steps=2 format=2]
-
-[ext_resource path="res://Lecture.2.gd" type="Script" id=1]
-
-[node name="Test" type="Node2D"]
-script = ExtResource( 1 )

Editor/Lecture.3.tscn

@@ -1,8 +0,0 @@
-[gd_scene load_steps=2 format=2]
-
-[ext_resource path="res://Lecture.3..gd" type="Script" id=1]
-
-[node name="Control" type="Control"]
-anchor_right = 1.0
-anchor_bottom = 1.0
-script = ExtResource( 1 )

Editor/Lectures/Lecture.2.gd

@@ -1,7 +1,5 @@
 extends Node
 
-const JsonBeautifier = preload("res://ThirdParty/json_beautifier.gd")
-
 # This closesly follows the source provided in the lectures.
 # Later on after the lectures are complete or when I deem
 # Necessary there will be heavy refactors.
@@ -194,14 +192,14 @@ func _ready():
 	GTokenizer.init(ProgramDescription)
 	
 	var ast = GParser.parse(GTokenizer)
-	print(JsonBeautifier.beautify_json(to_json(ast.toDict())))
+	print(JSON.print(ast.toDict(), "\t"))
 	
 	# String Test
 	ProgramDescription = "\"hello\""
 	GTokenizer.init(ProgramDescription)
 	
 	ast = GParser.parse(GTokenizer)
-	print(JsonBeautifier.beautify_json(to_json(ast.toDict())))
+	print(JSON.print(ast.toDict(), "\t"))
 
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.

Editor/Lectures/Lecture.3..gd

@@ -1,7 +1,5 @@
 extends Node
 
-const JsonBeautifier = preload("res://ThirdParty/json_beautifier.gd")
-
 # This closesly follows the source provided in the lectures.
 # Later on after the lectures are complete or when I deem
 # Necessary there will be heavy refactors.
@@ -208,7 +206,7 @@ func test():
 	
 	var ast = GParser.parse(GTokenizer)
 	
-	print(JsonBeautifier.beautify_json(to_json(ast.toDict())))
+	print(JSON.print(ast.toDict(), "\t"))
 	
 
 # Main Entry point.

Editor/Lectures/Lecture.4.gd

@@ -0,0 +1,307 @@
+extends Node
+
+# This closesly follows the source provided in the lectures.
+# Later on after the lectures are complete or when I deem
+# Necessary there will be heavy refactors.
+
+const TokenType = \
+{
+	Program    = "Program",
+	
+	# Comments
+	CommentLine      = "CommentLine",
+	CommentMultiLine = "CommentMultiLine",
+	
+	# Formatting
+	Whitespace = "Whitespace",
+	
+	# Statements
+	StatementEnd = "StatementEnd",
+	
+	# Literals
+	Number     = "Number",
+	String     = "String"
+}
+
+const TokenSpec = \
+{
+	TokenType.CommentLine      : "^\/\/.*",
+	TokenType.CommentMultiLine : "^\/\\*[\\s\\S]*?\\*\/",
+	TokenType.Whitespace       : "^\\s+",
+	TokenType.Number           : "\\d+",
+	TokenType.String           : "^\"[^\"]*\"",
+	TokenType.StatementEnd     : "^;"
+}
+
+class Token:
+	var Type  : String
+	var Value : String
+	
+	func toDict():
+		var result = \
+		{
+			Type  = self.Type,
+			Value = self.Value
+		}
+		return result
+
+class Tokenizer:
+	var SrcTxt : String
+	var Cursor : int;
+	
+	# Sets up the tokenizer with the program source text.
+	func init(programSrcText):
+		SrcTxt = programSrcText
+		Cursor = 0
+	
+	# Provides the next token in the source text.
+	func next_Token():
+		if self.reached_EndOfTxt() == true :
+			return null
+			
+		var srcLeft = self.SrcTxt.substr(Cursor)
+		var regex   = RegEx.new()
+		var token   = Token.new()
+		
+		for type in TokenSpec :
+			regex.compile(TokenSpec[type])
+			
+			var result = regex.search(srcLeft)
+			if  result == null || result.get_start() != 0 :
+				continue
+				
+			# Skip Comments
+			if type == TokenType.CommentLine || type == TokenType.CommentMultiLine :
+				self.Cursor += result.get_string().length()
+				return next_Token()
+				
+			# Skip Whitespace
+			if type == TokenType.Whitespace :
+				var addVal = result.get_string().length()
+				self.Cursor += addVal
+				
+				return next_Token()
+				
+			token.Type   = type
+			token.Value  = result.get_string()
+			self.Cursor += ( result.get_string().length() )
+				
+			return token
+			
+		var assertStrTmplt = "next_token: Source text not understood by tokenizer at Cursor pos: {value}"
+		var assertStr      = assertStrTmplt.format({"value" : self.Cursor})
+		assert(true != true, assertStr)
+		return null
+	
+	func reached_EndOfTxt():
+		return self.Cursor >= ( self.SrcTxt.length() - 1 )
+		
+var GTokenizer = Tokenizer.new()
+
+
+const SyntaxNodeType = \
+{
+	NumericLiteral      = "NumericLiteral",
+	StringLiteral       = "StringLiteral",
+	ExpressionStatement = "ExpressionStatement"
+}
+
+class SyntaxNode:
+	var Type  : String
+	var Value # Not specifing a type implicity declares a Variant type.
+	
+	func toDict():
+		var ValueDict = self.Value
+		if typeof(Value) == TYPE_ARRAY :
+			var dict  = {}
+			var index = 0
+			for entry in self.Value :
+				dict[index]  = entry.toDict()
+				index       += 1
+				
+			ValueDict = dict
+		
+		var result = \
+		{ 
+			Type  = self.Type,
+			Value = ValueDict
+		}
+		return result
+
+class ProgramNode:
+	var Type : String
+	var Body : Object
+	
+	func toDict():
+		var result = \
+		{
+			Type = self.Type,
+			Body = self.Body.toDict()
+		}
+		return result
+
+class Parser:
+	var TokenizerRef : Tokenizer
+	var NextToken    : Token
+	
+	func eat(tokenType):
+		var currToken = self.NextToken
+		
+		assert(currToken != null, "eat: NextToken was null")
+		
+		var assertStrTmplt = "eat: Unexpected token: {value}, expected: {type}"
+		var assertStr      = assertStrTmplt.format({"value" : currToken.Value, "type" : tokenType})
+		
+		assert(currToken.Type == tokenType, assertStr)
+		
+		self.NextToken = self.TokenizerRef.next_Token()
+		
+		return currToken
+	
+	# Literal
+	#	: NumericLiteral
+	#	: StringLiteral
+	#	;
+	#
+	func parse_Literal():
+		match NextToken.Type :
+			TokenType.Number:
+				return parse_NumericLiteral()
+			TokenType.String:
+				return parse_StringLiteral()
+				
+		assert(false, "parse_Literal: Was not able to detect valid literal type from NextToken")
+		
+	# NumericLiteral
+	#	: Number
+	#	;
+	#
+	func parse_NumericLiteral():
+		var Token = eat(TokenType.Number)
+		var \
+		node       = SyntaxNode.new()
+		node.Type  = SyntaxNodeType.NumericLiteral
+		node.Value = int( Token.Value )
+		
+		return node
+	
+	# StringLiteral
+	#	: String
+	#	;
+	#
+	func parse_StringLiteral():
+		var Token = eat(TokenType.String)
+		var \
+		node = SyntaxNode.new()
+		node.Type  = SyntaxNodeType.StringLiteral
+		node.Value = Token.Value.substr( 1, Token.Value.length() - 2 )
+
+		return node
+	
+	# Expression
+	#	: Literal
+	#	;
+	#	
+	func parse_Expression():
+		return parse_Literal()
+		
+	# ExpressionStatement
+	#	: Expression
+	#	;
+	#
+	func parse_ExpressionStatement():
+		var expression = parse_Expression()
+		eat(TokenType.StatementEnd)
+		
+		var \
+		node       = SyntaxNode.new()
+		node.Type  = SyntaxNodeType.ExpressionStatement
+		node.Value = expression
+		
+		return expression
+		
+	# Statement
+	# 	: ExpressionStatement
+	#	;
+	#
+	func parse_Statement():
+		return parse_ExpressionStatement()
+	
+	# StatementList
+	#	: Statement
+	#	| StatementList Statement -> Statement ...
+	#	;
+	#
+	func parse_StatementList():
+		var statementList = [ parse_Statement() ]
+		
+		while NextToken != null :
+			statementList.append( parse_Statement() )
+			
+		var \
+		node       = SyntaxNode.new()
+		node.Type  = "StatementList"
+		node.Value = statementList
+		
+		return node
+	
+	# Program
+	#	: StatementList
+	# 	: Literal
+	#	;
+	#
+	func parse_Program():
+		var \
+		node      = ProgramNode.new()
+		node.Type = TokenType.Program
+		node.Body = parse_StatementList()
+		
+		return node
+
+	# Parses the text program description into an AST.
+	func parse(TokenizerRef):
+		self.TokenizerRef = TokenizerRef
+		
+		NextToken = TokenizerRef.next_Token()
+		
+		return parse_Program()
+
+var GParser = Parser.new()
+
+const Tests = \
+{
+	MultiStatement = \
+	{
+		Name = "Multi-Statement",
+		File = "1.Multi-Statement.uf"
+	}
+}
+
+func test(entry):
+	var introMessage          = "Testing: {Name}"
+	var introMessageFormatted = introMessage.format({"Name" : entry.Name})
+	print(introMessageFormatted)
+	
+	var path          = "res://Tests/{TestName}"
+	var pathFormatted = path.format({"TestName" : entry.File})
+	
+	var \
+	file = File.new()
+	file.open(pathFormatted, File.READ)
+	
+	var programDescription = file.get_as_text()
+	file.close()
+	
+	GTokenizer.init(programDescription)
+	var ast = GParser.parse(GTokenizer)
+	
+	var json = JSON.print(ast.toDict(), "\t")
+	
+	print(JSON.print(ast.toDict(), "\t"))
+	print("Passed!\n")
+	
+
+# Main Entry point.
+func _ready():
+	for Key in Tests :
+		test(Tests[Key])

Editor/Lectures/Lecture.5.gd

@@ -0,0 +1,373 @@
+extends Node
+
+# This closesly follows the source provided in the lectures.
+# Later on after the lectures are complete or when I deem
+# Necessary there will be heavy refactors.
+
+const TokenType = \
+{
+	Program    = "Program",
+	
+	# Comments
+	CommentLine      = "CommentLine",
+	CommentMultiLine = "CommentMultiLine",
+	
+	# Formatting
+	Whitespace = "Whitespace",
+	
+	# Statements
+	StatementEnd    = "StatementEnd",
+	StmtBlockStart = "BlockStatementStart",
+	StmtBlockEnd   = "BlockStatementEnd",
+	
+	# Literals
+	Number     = "Number",
+	String     = "String"
+}
+
+const TokenSpec = \
+{
+	TokenType.CommentLine      : "^\/\/.*",
+	TokenType.CommentMultiLine : "^\/\\*[\\s\\S]*?\\*\/",
+	TokenType.Whitespace       : "^\\s+",
+	TokenType.Number           : "\\d+",
+	TokenType.String           : "^\"[^\"]*\"",
+	TokenType.StatementEnd     : "^;",
+	TokenType.StmtBlockStart   : "^{",
+	TokenType.StmtBlockEnd     : "^}"
+}
+
+class Token:
+	var Type  : String
+	var Value : String
+	
+	func toDict():
+		var result = \
+		{
+			Type  = self.Type,
+			Value = self.Value
+		}
+		return result
+
+class Tokenizer:
+	var SrcTxt : String
+	var Cursor : int;
+	
+	# Sets up the tokenizer with the program source text.
+	func init(programSrcText):
+		SrcTxt = programSrcText
+		Cursor = 0
+	
+	# Provides the next token in the source text.
+	func next_Token():
+		if self.reached_EndOfTxt() == true :
+			return null
+			
+		var srcLeft = self.SrcTxt.substr(Cursor)
+		var regex   = RegEx.new()
+		var token   = Token.new()
+		
+		for type in TokenSpec :
+			regex.compile(TokenSpec[type])
+			
+			var result = regex.search(srcLeft)
+			if  result == null || result.get_start() != 0 :
+				continue
+				
+			# Skip Comments
+			if type == TokenType.CommentLine || type == TokenType.CommentMultiLine :
+				self.Cursor += result.get_string().length()
+				return next_Token()
+				
+			# Skip Whitespace
+			if type == TokenType.Whitespace :
+				var addVal = result.get_string().length()
+				self.Cursor += addVal
+				
+				return next_Token()
+				
+			token.Type   = type
+			token.Value  = result.get_string()
+			self.Cursor += ( result.get_string().length() )
+				
+			return token
+			
+		var assertStrTmplt = "next_token: Source text not understood by tokenizer at Cursor pos: {value}"
+		var assertStr      = assertStrTmplt.format({"value" : self.Cursor})
+		assert(true != true, assertStr)
+		return null
+	
+	func reached_EndOfTxt():
+		return self.Cursor >= ( self.SrcTxt.length() )
+		
+var GTokenizer = Tokenizer.new()
+
+
+const SyntaxNodeType = \
+{
+	NumericLiteral      = "NumericLiteral",
+	StringLiteral       = "StringLiteral",
+	ExpressionStatement = "ExpressionStatement",
+	BlockStatement      = "BlockStatement",
+	EmptyStatement      = "EmptyStatement"
+}
+
+class SyntaxNode:
+	var Type  : String
+	var Value # Not specifing a type implicity declares a Variant type.
+	
+	func toDict():
+		var ValueDict = self.Value
+		if typeof(Value) == TYPE_ARRAY :
+			var dict  = {}
+			var index = 0
+			for entry in self.Value :
+				dict[index]  = entry.toDict()
+				index       += 1
+				
+			ValueDict = dict
+			
+		if typeof(Value) == TYPE_OBJECT :
+			var reuslt = \
+			{
+				Type = self.Type,
+				Value = self.Value.toDict()
+			}
+			return reuslt
+		
+		var result = \
+		{ 
+			Type  = self.Type,
+			Value = ValueDict
+		}
+		return result
+
+class ProgramNode:
+	var Type : String
+	var Body : Object
+	
+	func toDict():
+		var result = \
+		{
+			Type = self.Type,
+			Body = self.Body.toDict()
+		}
+		return result
+
+class Parser:
+	var TokenizerRef : Tokenizer
+	var NextToken    : Token
+	
+	func eat(tokenType):
+		var currToken = self.NextToken
+		
+		assert(currToken != null, "eat: NextToken was null")
+		
+		var assertStrTmplt = "eat: Unexpected token: {value}, expected: {type}"
+		var assertStr      = assertStrTmplt.format({"value" : currToken.Value, "type" : tokenType})
+		
+		assert(currToken.Type == tokenType, assertStr)
+		
+		self.NextToken = self.TokenizerRef.next_Token()
+		
+		return currToken
+	
+	# Literal
+	#	: NumericLiteral
+	#	: StringLiteral
+	#	;
+	#
+	func parse_Literal():
+		match NextToken.Type :
+			TokenType.Number:
+				return parse_NumericLiteral()
+			TokenType.String:
+				return parse_StringLiteral()
+				
+		assert(false, "parse_Literal: Was not able to detect valid literal type from NextToken")
+		
+	# NumericLiteral
+	#	: Number
+	#	;
+	#
+	func parse_NumericLiteral():
+		var Token = eat(TokenType.Number)
+		var \
+		node       = SyntaxNode.new()
+		node.Type  = SyntaxNodeType.NumericLiteral
+		node.Value = int( Token.Value )
+		
+		return node
+	
+	# StringLiteral
+	#	: String
+	#	;
+	#
+	func parse_StringLiteral():
+		var Token = eat(TokenType.String)
+		var \
+		node       = SyntaxNode.new()
+		node.Type  = SyntaxNodeType.StringLiteral
+		node.Value = Token.Value.substr( 1, Token.Value.length() - 2 )
+
+		return node
+	
+	# Expression
+	#	: Literal
+	#	;
+	#	
+	func parse_Expression():
+		return parse_Literal()
+		
+	# EmptyStatement
+	#	;
+	#
+	func parse_EmptyStatement():
+		eat(TokenType.StatementEnd)
+	
+		var \
+		node = SyntaxNode.new()
+		node.Type = SyntaxNodeType.EmptyStatement
+		
+		return node
+
+	# BlockStatement
+	#	: { OptStatementList }
+	#	;
+	#
+	func parse_BlockStatement():
+		eat(TokenType.StmtBlockStart)
+
+		var \
+		node      = SyntaxNode.new()
+		node.Type = SyntaxNodeType.BlockStatement
+
+		if NextToken.Type != TokenType.StmtBlockEnd :
+			node.Value = parse_StatementList(TokenType.StmtBlockEnd)
+		else :
+			node.Value = []
+
+		eat(TokenType.StmtBlockEnd)
+
+		return node
+		
+	# ExpressionStatement
+	#	: Expression
+	#	;
+	#
+	func parse_ExpressionStatement():
+		var expression = parse_Expression()
+		eat(TokenType.StatementEnd)
+		
+		var \
+		node       = SyntaxNode.new()
+		node.Type  = SyntaxNodeType.ExpressionStatement
+		node.Value = expression
+		
+		return expression
+		
+	# Statement
+	# 	: ExpressionStatement
+	#	: BlockStatement
+	#	: EmptyStatement
+	#	;
+	#
+	func parse_Statement():
+		match NextToken.Type :
+			TokenType.StatementEnd :
+				return parse_EmptyStatement()
+			TokenType.StmtBlockStart :
+				return parse_BlockStatement()
+
+		return parse_ExpressionStatement()
+	
+	# StatementList
+	#	: Statement
+	#	| StatementList Statement -> Statement ...
+	#	;
+	#
+	func parse_StatementList(endToken):
+		var statementList = [ parse_Statement() ]
+		
+		while NextToken != null && NextToken.Type != endToken :
+			statementList.append( parse_Statement() )
+			
+		var \
+		node       = SyntaxNode.new()
+		node.Type  = "StatementList"
+		node.Value = statementList
+		
+		return node
+	
+	# Program
+	#	: StatementList
+	# 	: Literal
+	#	;
+	#
+	func parse_Program():
+		var \
+		node      = ProgramNode.new()
+		node.Type = TokenType.Program
+		node.Body = parse_StatementList(null)
+		
+		return node
+
+	# Parses the text program description into an AST.
+	func parse(TokenizerRef):
+		self.TokenizerRef = TokenizerRef
+		
+		NextToken = TokenizerRef.next_Token()
+		
+		return parse_Program()
+
+var GParser = Parser.new()
+
+
+
+onready var TextOut = GScene.get_node("TextOutput")
+
+func tout(text):
+	TextOut.insert_text_at_cursor(text)
+
+const Tests = \
+{
+	MultiStatement = \
+	{
+		Name = "Multi-Statement",
+		File = "1.Multi-Statement.uf"
+	},
+	BlockStatement = \
+	{
+		Name = "Block Statement",
+		File = "2.BlockStatement.uf"
+	}
+}
+
+func test(entry):
+	var introMessage          = "Testing: {Name}\n"
+	var introMessageFormatted = introMessage.format({"Name" : entry.Name})
+	tout(introMessageFormatted)
+	
+	var path          = "res://Tests/{TestName}"
+	var pathFormatted = path.format({"TestName" : entry.File})
+	
+	var \
+	file = File.new()
+	file.open(pathFormatted, File.READ)
+	
+	var programDescription = file.get_as_text()
+	file.close()
+	
+	GTokenizer.init(programDescription)
+	var ast = GParser.parse(GTokenizer)
+	
+	var json = JSON.print(ast.toDict(), "\t")
+	
+	tout(json + "\n")
+	tout("Passed!\n")
+	
+
+# Main Entry point.
+func _ready():
+	for Key in Tests :
+		test(Tests[Key])

Editor/Lectures/Lecture.6.gd

@@ -0,0 +1,382 @@
+extends Node
+
+# This closesly follows the source provided in the lectures.
+# Later on after the lectures are complete or when I deem
+# Necessary there will be heavy refactors.
+
+const TokenType = \
+{
+	Program    = "Program",
+	
+	# Comments
+	CommentLine      = "CommentLine",
+	CommentMultiLine = "CommentMultiLine",
+	
+	# Formatting
+	Whitespace = "Whitespace",
+	
+	# Statements
+	StatementEnd    = "StatementEnd",
+	StmtBlockStart = "BlockStatementStart",
+	StmtBlockEnd   = "BlockStatementEnd",
+	
+	# Literals
+	Number     = "Number",
+	String     = "String"
+}
+
+const TokenSpec = \
+{
+	TokenType.CommentLine      : "^\/\/.*",
+	TokenType.CommentMultiLine : "^\/\\*[\\s\\S]*?\\*\/",
+	TokenType.Whitespace       : "^\\s+",
+	TokenType.Number           : "\\d+",
+	TokenType.String           : "^\"[^\"]*\"",
+	TokenType.StatementEnd     : "^;",
+	TokenType.StmtBlockStart   : "^{",
+	TokenType.StmtBlockEnd     : "^}"
+}
+
+class Token:
+	var Type  : String
+	var Value : String
+	
+	func to_Dictionary():
+		var result = \
+		{
+			Type  = self.Type,
+			Value = self.Value
+		}
+		return result
+
+class Tokenizer:
+	var SrcTxt : String
+	var Cursor : int;
+	
+	# Sets up the tokenizer with the program source text.
+	func init(programSrcText):
+		SrcTxt = programSrcText
+		Cursor = 0
+	
+	# Provides the next token in the source text.
+	func next_Token():
+		if self.reached_EndOfTxt() == true :
+			return null
+			
+		var srcLeft = self.SrcTxt.substr(Cursor)
+		var regex   = RegEx.new()
+		var token   = Token.new()
+		
+		for type in TokenSpec :
+			regex.compile(TokenSpec[type])
+			
+			var result = regex.search(srcLeft)
+			if  result == null || result.get_start() != 0 :
+				continue
+				
+			# Skip Comments
+			if type == TokenType.CommentLine || type == TokenType.CommentMultiLine :
+				self.Cursor += result.get_string().length()
+				return next_Token()
+				
+			# Skip Whitespace
+			if type == TokenType.Whitespace :
+				var addVal = result.get_string().length()
+				self.Cursor += addVal
+				
+				return next_Token()
+				
+			token.Type   = type
+			token.Value  = result.get_string()
+			self.Cursor += ( result.get_string().length() )
+				
+			return token
+			
+		var assertStrTmplt = "next_token: Source text not understood by tokenizer at Cursor pos: {value}"
+		var assertStr      = assertStrTmplt.format({"value" : self.Cursor})
+		assert(true != true, assertStr)
+		return null
+	
+	func reached_EndOfTxt():
+		return self.Cursor >= ( self.SrcTxt.length() )
+		
+var GTokenizer = Tokenizer.new()
+
+
+
+const AST_Format = \
+{
+	Dictionary  = "Dictionary",
+	SExpression = "S-Expression"
+}
+
+const SyntaxNodeType = \
+{
+	NumericLiteral      = "NumericLiteral",
+	StringLiteral       = "StringLiteral",
+	ExpressionStatement = "ExpressionStatement",
+	BlockStatement      = "BlockStatement",
+	EmptyStatement      = "EmptyStatement"
+}
+
+class SyntaxNode:
+	var Type  : String
+	var Value # Not specifing a type implicity declares a Variant type.
+
+	func to_SExpression():
+		var expression = [ Type ]
+
+		if typeof(Value) == TYPE_ARRAY :
+			var array = []
+			for entry in self.Value :
+				array.append( entry.to_SExpression() )
+			
+			expression.append(array)
+			return expression
+			
+		if typeof(Value) == TYPE_OBJECT :
+			var result = [ Type, Value.to_SExpression() ]
+			return result
+			
+		expression.append(Value)
+		return expression
+	
+	func to_Dictionary():
+		if typeof(Value) == TYPE_ARRAY :
+			var array = []
+			for entry in self.Value :
+				array.append(entry.to_Dictionary())
+			var result = \
+			{
+				Type  = self.Type,
+				Value = array
+			}
+			return result
+			
+		if typeof(Value) == TYPE_OBJECT :
+			var result = \
+			{
+				Type  = self.Type,
+				Value = self.Value.to_Dictionary()
+			}
+			return result
+
+		var result = \
+		{ 
+			Type  = self.Type,
+			Value = self.Value
+		}
+		return result
+
+class Parser:
+	var TokenizerRef : Tokenizer
+	var NextToken    : Token
+	
+	func eat(tokenType):
+		var currToken = self.NextToken
+		
+		assert(currToken != null, "eat: NextToken was null")
+		
+		var assertStrTmplt = "eat: Unexpected token: {value}, expected: {type}"
+		var assertStr      = assertStrTmplt.format({"value" : currToken.Value, "type" : tokenType})
+		
+		assert(currToken.Type == tokenType, assertStr)
+		
+		self.NextToken = self.TokenizerRef.next_Token()
+		
+		return currToken
+	
+	# Literal
+	#	: NumericLiteral
+	#	: StringLiteral
+	#	;
+	#
+	func parse_Literal():
+		match NextToken.Type :
+			TokenType.Number:
+				return parse_NumericLiteral()
+			TokenType.String:
+				return parse_StringLiteral()
+				
+		assert(false, "parse_Literal: Was not able to detect valid literal type from NextToken")
+		
+	# NumericLiteral
+	#	: Number
+	#	;
+	#
+	func parse_NumericLiteral():
+		var Token = eat(TokenType.Number)
+		var \
+		node       = SyntaxNode.new()
+		node.Type  = SyntaxNodeType.NumericLiteral
+		node.Value = int( Token.Value )
+		
+		return node
+	
+	# StringLiteral
+	#	: String
+	#	;
+	#
+	func parse_StringLiteral():
+		var Token = eat(TokenType.String)
+		var \
+		node       = SyntaxNode.new()
+		node.Type  = SyntaxNodeType.StringLiteral
+		node.Value = Token.Value.substr( 1, Token.Value.length() - 2 )
+
+		return node
+	
+	# Expression
+	#	: Literal
+	#	;
+	#	
+	func parse_Expression():
+		return parse_Literal()
+		
+	# EmptyStatement
+	#	;
+	#
+	func parse_EmptyStatement():
+		eat(TokenType.StatementEnd)
+	
+		var \
+		node = SyntaxNode.new()
+		node.Type = SyntaxNodeType.EmptyStatement
+		
+		return node
+
+	# BlockStatement
+	#	: { OptStatementList }
+	#	;
+	#
+	func parse_BlockStatement():
+		eat(TokenType.StmtBlockStart)
+
+		var \
+		node      = SyntaxNode.new()
+		node.Type = SyntaxNodeType.BlockStatement
+
+		if NextToken.Type != TokenType.StmtBlockEnd :
+			node.Value = parse_StatementList(TokenType.StmtBlockEnd)
+		else :
+			node.Value = []
+
+		eat(TokenType.StmtBlockEnd)
+
+		return node
+		
+	# ExpressionStatement
+	#	: Expression
+	#	;
+	#
+	func parse_ExpressionStatement():
+		var expression = parse_Expression()
+		eat(TokenType.StatementEnd)
+		
+		var \
+		node       = SyntaxNode.new()
+		node.Type  = SyntaxNodeType.ExpressionStatement
+		node.Value = expression
+		
+		return expression
+		
+	# Statement
+	# 	: ExpressionStatement
+	#	: BlockStatement
+	#	: EmptyStatement
+	#	;
+	#
+	func parse_Statement():
+		match NextToken.Type :
+			TokenType.StatementEnd :
+				return parse_EmptyStatement()
+			TokenType.StmtBlockStart :
+				return parse_BlockStatement()
+
+		return parse_ExpressionStatement()
+	
+	# StatementList
+	#	: Statement
+	#	| StatementList Statement -> Statement ...
+	#	;
+	#
+	func parse_StatementList(endToken):
+		var statementList = [ parse_Statement() ]
+		
+		while NextToken != null && NextToken.Type != endToken :
+			statementList.append( parse_Statement() )
+			
+		return statementList
+	
+	# Program
+	#	: StatementList
+	# 	: Literal
+	#	;
+	#
+	func parse_Program():
+		var \
+		node       = SyntaxNode.new()
+		node.Type  = TokenType.Program
+		node.Value = parse_StatementList(null)
+		
+		return node
+
+	# Parses the text program description into an AST.
+	func parse(TokenizerRef):
+		self.TokenizerRef = TokenizerRef
+		
+		NextToken = TokenizerRef.next_Token()
+		
+		return parse_Program()
+
+var GParser = Parser.new()
+
+
+
+onready var TextOut = GScene.get_node("TextOutput")
+
+func tout(text):
+	TextOut.insert_text_at_cursor(text)
+
+const Tests = \
+{
+	MultiStatement = \
+	{
+		Name = "Multi-Statement",
+		File = "1.Multi-Statement.uf"
+	},
+	BlockStatement = \
+	{
+		Name = "Block Statement",
+		File = "2.BlockStatement.uf"
+	}
+}
+
+func test(entry):
+	var introMessage          = "Testing: {Name}\n"
+	var introMessageFormatted = introMessage.format({"Name" : entry.Name})
+	tout(introMessageFormatted)
+	
+	var path          = "res://Tests/{TestName}"
+	var pathFormatted = path.format({"TestName" : entry.File})
+	
+	var \
+	file = File.new()
+	file.open(pathFormatted, File.READ)
+	
+	var programDescription = file.get_as_text()
+	file.close()
+	
+	GTokenizer.init(programDescription)
+	var ast = GParser.parse(GTokenizer)
+	
+	var json = JSON.print(ast.to_SExpression(), '\t')
+	
+	tout(json + "\n")
+	tout("Passed!\n")
+	
+
+# Main Entry point.
+func _ready():
+	for Key in Tests :
+		test(Tests[Key])

Editor/Lectures/Lecture.tscn

@@ -0,0 +1,27 @@
+[gd_scene load_steps=3 format=2]
+
+[ext_resource path="res://Assets/Styles/EditorTheme.tres" type="Theme" id=1]
+[ext_resource path="res://Assets/Branding/RDP_Class_cover_small.png" type="Texture" id=2]
+
+[node name="Control" type="Control"]
+anchor_right = 1.0
+anchor_bottom = 1.0
+
+[node name="CourseBrand" type="TextureRect" parent="."]
+anchor_right = 1.0
+anchor_bottom = 1.0
+rect_scale = Vector2( 0.25, 0.25 )
+texture = ExtResource( 2 )
+expand = true
+stretch_mode = 6
+
+[node name="TextOutput" type="TextEdit" parent="."]
+anchor_left = 0.25
+anchor_right = 1.0
+anchor_bottom = 1.0
+grow_horizontal = 0
+theme = ExtResource( 1 )
+readonly = true
+highlight_current_line = true
+show_line_numbers = true
+minimap_draw = true

Editor/Persistent.tscn

@@ -0,0 +1,3 @@
+[gd_scene format=2]
+
+[node name="P-Root" type="Node"]

Editor/Tests/1.Multi-Statement.uf

@@ -0,0 +1,8 @@
+// Testing a comment    
+"Hello World!";
+
+/**
+*
+* Testing a comment    
+*/
+42;

Editor/Tests/2.BlockStatement.uf

@@ -0,0 +1,18 @@
+{
+	42;
+	"Hello World!";
+}
+
+{
+
+}
+
+{
+	42;
+	{
+		"Hello World!";
+	}
+	{
+		;
+	}
+}

Editor/Tests/3.BinaryExpression.uf

@@ -0,0 +1,7 @@
+// Binary expression
+2 + 2;
+
+// Nested binary expressions:
+// left : 3 + 2
+// right : 2
+3 + 2 - 2;

Editor/Tests/4.Assignment.uf

@@ -0,0 +1,5 @@
+// Single
+x = 42;
+
+// Chained
+x = (y = 42);

Editor/Tests/5.Conditionals.uf

@@ -0,0 +1,8 @@
+if (x) 
+{
+	x = 1;
+}
+else
+{
+	x = 2;
+}

Editor/Tests/6.Relations.uf

@@ -0,0 +1 @@
+x > 0;

Editor/Tests/7.VariableDeclaration.uf

@@ -0,0 +1,8 @@
+// Declaration
+let x;
+
+// Single assignment declaration
+let y = 42;
+
+// Multiple declarations
+let a, b;

Editor/ThirdParty/json_beautifier.gd

@@ -1,133 +0,0 @@
-###############################################################################
-# JSON Beautifier                                                             #
-# Copyright (C) 2018-2020 Michael Alexsander                                  #
-#-----------------------------------------------------------------------------#
-# This Source Code Form is subject to the terms of the Mozilla Public         #
-# License, v. 2.0. If a copy of the MPL was not distributed with this         #
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.                    #
-###############################################################################
-
-class_name JSONBeautifier
-
-
-# Takes valid JSON (if invalid, it will return a error according with Godot's
-# 'validade_json()' method) and a number of spaces for indentation (default is
-# '0', in which it will use tabs instead), returning properly formatted JSON.
-static func beautify_json(json: String, spaces := 0) -> String:
-	var error_message: String = validate_json(json)
-	if not error_message.empty():
-		return error_message
-
-	var indentation := ""
-	if spaces > 0:
-		for i in spaces:
-			indentation += " "
-	else:
-		indentation = "\t"
-
-	var quotation_start := -1
-	var char_position := 0
-	for i in json:
-		# Workaround a Godot quirk, as it allows JSON strings to end with a
-		# trailing comma.
-		if i == "," and char_position + 1 == json.length():
-			break
-	
-		# Avoid formating inside strings.
-		if i == "\"":
-			if quotation_start == -1:
-				quotation_start = char_position
-			elif json[char_position - 1] != "\\":
-				quotation_start = -1
-
-			char_position += 1
-
-			continue
-		elif quotation_start != -1:
-			char_position += 1
-
-			continue
-
-		match i:
-			# Remove pre-existing formatting.
-			" ", "\n", "\t":
-				json[char_position] = ""
-				char_position -= 1
-			"{", "[", ",":
-				if json[char_position + 1] != "}" and\
-						json[char_position + 1] != "]":
-					json = json.insert(char_position + 1, "\n")
-					char_position += 1
-			"}", "]":
-				if json[char_position - 1] != "{" and\
-						json[char_position - 1] != "[":
-					json = json.insert(char_position, "\n")
-					char_position += 1
-			":":
-				json = json.insert(char_position + 1, " ")
-				char_position += 1
-		
-		char_position += 1
-
-	for i in [["{", "}"], ["[", "]"]]:
-		var bracket_start: int = json.find(i[0])
-		while bracket_start != -1:
-			var bracket_end: int = json.find("\n", bracket_start)
-			var bracket_count := 0
-			while bracket_end != - 1:
-				if json[bracket_end - 1] == i[0]:
-					bracket_count += 1
-				elif json[bracket_end + 1] == i[1]:
-					bracket_count -= 1
-
-				# Move through the indentation to see if there is a match.
-				while json[bracket_end + 1] == indentation[0]:
-					bracket_end += 1
-
-					if json[bracket_end + 1] == i[1]:
-						bracket_count -= 1
-
-				if bracket_count <= 0:
-					break
-
-				bracket_end = json.find("\n", bracket_end + 1)
-
-			# Skip one newline so the end bracket doesn't get indented.
-			bracket_end = json.rfind("\n", json.rfind("\n", bracket_end) - 1)
-			while bracket_end > bracket_start:
-				json = json.insert(bracket_end + 1, indentation)
-				bracket_end = json.rfind("\n", bracket_end - 1)
-
-			bracket_start = json.find(i[0], bracket_start + 1)
-
-	return json
-
-
-# Takes valid JSON (if invalid, it will return a error according with Godot's
-# 'validade_json()' method), returning JSON in a single line.
-static func uglify_json(json: String) -> String:
-	var quotation_start := -1
-	var char_position := 0
-	for i in json:
-		# Avoid formating inside strings.
-		if i == "\"":
-			if quotation_start == -1:
-				quotation_start = char_position
-			elif json[char_position - 1] != "\\":
-				quotation_start = -1
-
-			char_position += 1
-
-			continue
-		elif quotation_start != -1:
-			char_position += 1
-
-			continue
-
-		if i == " " or i == "\n" or i == "\t":
-			json[char_position] = ""
-			char_position -= 1
-
-		char_position += 1
-
-	return json

Editor/project.godot

@@ -8,22 +8,17 @@
 
 config_version=4
 
-_global_script_classes=[ {
-"base": "Reference",
-"class": "JSONBeautifier",
-"language": "GDScript",
-"path": "res://ThirdParty/json_beautifier.gd"
-} ]
-_global_script_class_icons={
-"JSONBeautifier": ""
-}
-
 [application]
 
 config/name="Parser"
-run/main_scene="res://Lecture.3.tscn"
+run/main_scene="res://Persistent.tscn"
-boot_splash/image="res://Branding/RDP_Class_cover_small.png"
+boot_splash/image="res://Assets/Branding/RDP_Class_cover_small.png"
-config/icon="res://Branding/RDP_Class_cover_small.png"
+config/icon="res://Assets/Branding/RDP_Class_cover_small.png"
+
+[autoload]
+
+GScene="*res://Lectures/Lecture.tscn"
+GScript="*res://Lectures/Lecture.6.gd"
 
 [gui]
 

build_engine.bat

@@ -0,0 +1,5 @@
+cd Engine\gd\
+
+scons -j%NUMBER_OF_PROCESSORS% platform=windows
+
+exit

editor.bat

@@ -1,5 +1,3 @@
-cd Engine\gd\bin\
+start Engine\gd\bin\godot.windows.tools.64.exe -e Editor/project.godot
 
-start godot.windows.tools.64.exe
 
-exit

logs/godot.log

@@ -0,0 +1,12 @@
+Godot Engine v3.3.4.stable.official.faf3f883d - https://godotengine.org
+OpenGL ES 3.0 Renderer: NVIDIA GeForce GTX 1080/PCIe/SSE2
+OpenGL ES Batching: ON
+ 
+**ERROR**: Condition "err" is true. Returned: err
+   At: modules/gdscript/gdscript.cpp:815:load_source_code() - Condition "err" is true. Returned: err
+**ERROR**: Cannot load source code from file 'C:/Projects/Study/LangStudies/Editor/Lecture.3.gd'.
+   At: modules/gdscript/gdscript.cpp:2241:load() - Condition "err != OK" is true. Returned: RES()
+**ERROR**: Failed loading resource: C:/Projects/Study/LangStudies/Editor/Lecture.3.gd. Make sure resources have been imported by opening the project in the editor at least once.
+   At: core/io/resource_loader.cpp:282:_load() - Condition "found" is true. Returned: RES()
+**ERROR**: Can't load script: C:/Projects/Study/LangStudies/Editor/Lecture.3.gd
+   At: main/main.cpp:1658:start() - Condition "script_res.is_null()" is true. Returned: false

logs/godot_2022-07-07_21.35.04.log

@@ -0,0 +1,7 @@
+Godot Engine v3.3.4.stable.official.faf3f883d - https://godotengine.org
+OpenGL ES 3.0 Renderer: NVIDIA GeForce GTX 1080/PCIe/SSE2
+OpenGL ES Batching: ON
+ 
+Project is missing: C:/Projects/Study/Parsing/Editor/project.godot
+**ERROR**: Condition "default_certs != __null" is true.
+   At: modules/mbedtls/crypto_mbedtls.cpp:201:load_default_certificates() - Condition "default_certs != __null" is true.

logs/godot_2022-07-07_21.35.40.log

@@ -0,0 +1,12 @@
+Godot Engine v3.3.4.stable.official.faf3f883d - https://godotengine.org
+OpenGL ES 3.0 Renderer: NVIDIA GeForce GTX 1080/PCIe/SSE2
+OpenGL ES Batching: ON
+ 
+**ERROR**: Condition "err" is true. Returned: err
+   At: modules/gdscript/gdscript.cpp:815:load_source_code() - Condition "err" is true. Returned: err
+**ERROR**: Cannot load source code from file 'C:/Projects/Study/LangStudies/Editor/Lecture.3.gd'.
+   At: modules/gdscript/gdscript.cpp:2241:load() - Condition "err != OK" is true. Returned: RES()
+**ERROR**: Failed loading resource: C:/Projects/Study/LangStudies/Editor/Lecture.3.gd. Make sure resources have been imported by opening the project in the editor at least once.
+   At: core/io/resource_loader.cpp:282:_load() - Condition "found" is true. Returned: RES()
+**ERROR**: Can't load script: C:/Projects/Study/LangStudies/Editor/Lecture.3.gd
+   At: main/main.cpp:1658:start() - Condition "script_res.is_null()" is true. Returned: false