Lexer done for now, moving on to ast

.mailmap

@@ -0,0 +1 @@
+Michael Fabian 'Xaymar' Dirks <info@xaymar.com>

CMakeLists.txt

@@ -207,12 +207,13 @@ function(init_project TARGET)
 		)
 	endif()
 
-	if(MSVC) # Microsoft Visual C/C++		
-		target_compile_options(${TARGET} PRIVATE
+	if(MSVC) # Microsoft Visual C/C++
+		target_compile_definitions(${TARGET} PRIVATE
 			# Disable useless/terrible behavior from MSVC
 			_CRT_SECURE_NO_WARNINGS
 			_ENABLE_EXTENDED_ALIGNED_STORAGE
-
+		)
+		target_compile_options(${TARGET} PRIVATE
 			# Dynamically link Microsoft C/C++ Redistributable.
 			$<$<CONFIG:>:/MD>
 			$<$<CONFIG:Debug>:/MDd>

code_compiler/source/ast/ast.cpp

@@ -1 +1,29 @@
-#include "ast.hpp"
+// AUTOGENERATED COPYRIGHT HEADER START
+// Copyright (C) 2017-2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
+// AUTOGENERATED COPYRIGHT HEADER END
+#include "ast.hpp"
+#include <cstdlib>
+
+
+blitz::ast::value_expression::value_expression(blitz::token token) : expression(token) {}
+
+blitz::ast::integer_expression::integer_expression(blitz::token token) : value_expression(token), _value(0)
+{
+	if (_token.text.length() > 0) {
+		_value = atol(_token.text.c_str());
+	}
+}
+
+blitz::ast::real_expression::real_expression(blitz::token token) : value_expression(token), _value(0.0f)
+{
+	if (_token.text.length() > 0) {
+		_value = atof(_token.text.c_str());
+	}
+}
+
+blitz::ast::string_expression::string_expression(blitz::token token) : value_expression(token), _value()
+{
+	_value = _token.text;
+}
+
+blitz::ast::variable_expression::variable_expression(blitz::token token) : expression(token) {}

code_compiler/source/ast/ast.hpp

@@ -2,12 +2,113 @@
 // Copyright (C) 2017-2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
 // AUTOGENERATED COPYRIGHT HEADER END
 #pragma once
+#include <list>
+#include <memory>
+#include <optional>
+#include <string>
+#include "../lexer.hpp"
+
+// BlitzBasic Built-Ins
+// - Include: Followed by a String, which is the file to include at this location.
+// - Const: Defines one or more constants, which can not be modified.
+// - Local: Defines one or more local variables, which can be modified.
+// - Global: Defines one or more global variables, which can be modified from anywhere.
+// - Dim: Defines a dynamically resizable array, globally accessible and modifyable.
+// - If, Then, ElseIf, EndIf: Your classic If.
+// - Select, Case, Default, End Select: Your classic Select.
+// - For, To, Step, Next: Your classic For loop.
+// - While, Wend: Your classic While loop.
+// - Repeat, Until, Forever: Similar to While/Wend, but the condition is at the end and will only loop if the condition is false.
+// - Exit: Exit from any currently active loops. I guess this allows leaving Repeat/Forever combinations.
+// - True, False: True and False. What, did you expect something else?
+// - Stop: Pause the program for the debugger, if there happens to be one.
+// - End: Terminate the program.
+// - Goto: Jump to a specific label, without setting the return address.
+// - Gosub, Return: Jump to a specific label (subroutine), setting the return address appropriately, and Return from it eventually.
+// - Function, Return, End Function: Defines a function, and allows returning values. Yes, I know, End itself terminates the program, this is a special case. Thanks younger Sibly.
+// - And, Or, Not: Logical operator, self-explanatory really.
 
 namespace blitz {
 	namespace ast {
 		class expression {
 			public:
-			virtual ~expression() {};
+			virtual ~expression() = default;
 		};
-	}
-}
+
+		// Values
+		class value_expression : public expression {
+			protected:
+			blitz::token _token;
+
+			public:
+			virtual ~value_expression() = default;
+			value_expression(blitz::token token);
+		};
+
+		class integer_expression : public value_expression {
+			protected:
+			int32_t _value;
+
+			public:
+			virtual ~integer_expression() = default;
+			integer_expression(blitz::token token);
+		};
+
+		class real_expression : public value_expression {
+			protected:
+			float _value;
+
+			public:
+			virtual ~real_expression() = default;
+			real_expression(blitz::token token);
+		};
+
+		class string_expression : public value_expression {
+			std::string _value;
+
+			public:
+			virtual ~string_expression() = default;
+			string_expression(blitz::token token);
+		};
+
+		/** One or more constant values
+		 *
+		 * Const var = Value, var2 = value
+		 */
+		class const_expression : public expression {
+			std::list<std::shared_ptr<variable_expression>> _values;
+
+		};
+
+		/** One or more local variables
+		 *
+		 * Local var, var2 = value, var3
+		 */
+		class local_expression : public expression {
+			std::list<std::shared_ptr<variable_expression>> _values;
+		};
+
+		/** One or more global variables
+		 *
+		 * Local var, var2 = value, var3
+		 */
+		class global_expression : public expression {
+			std::list<std::shared_ptr<variable_expression>> _values;
+		};
+
+		/** A variable definition
+		 *
+		 * 
+		 */
+		class variable_expression : public expression {
+			blitz::token                      _assign;
+			std::string                       _name;
+			std::shared_ptr<value_expression> _value;
+
+			public:
+			virtual ~variable_expression() = default;
+			variable_expression(blitz::token token);
+		};
+
+	} // namespace ast
+} // namespace blitz

code_compiler/source/ast/value.cpp

@@ -17,7 +17,7 @@ blitz::ast::NumberExpression::NumberExpression(int32_t value) : value(value) {}
 blitz::ast::NumberExpression::~NumberExpression() {}
 
 blitz::ast::ValueType blitz::ast::NumberExpression::GetType() {
-	return ValueType::Number;
+	return ValueType::INTEGER;
 }
 
 blitz::ast::DecimalExpression::DecimalExpression(float_t value) : value(value) {}
@@ -25,7 +25,7 @@ blitz::ast::DecimalExpression::DecimalExpression(float_t value) : value(value) {
 blitz::ast::DecimalExpression::~DecimalExpression() {}
 
 blitz::ast::ValueType blitz::ast::DecimalExpression::GetType() {
-	return ValueType::Decimal;
+	return ValueType::REAL;
 }
 
 blitz::ast::StringExpression::StringExpression(std::string value) : value(value) {}
@@ -33,7 +33,7 @@ blitz::ast::StringExpression::StringExpression(std::string value) : value(value)
 blitz::ast::StringExpression::~StringExpression() {}
 
 blitz::ast::ValueType blitz::ast::StringExpression::GetType() {
-	return ValueType::String;
+	return ValueType::STRING;
 }
 
 blitz::ast::ConstExpression::ConstExpression(std::string& name, std::unique_ptr<ValueExpression> value)

code_compiler/source/ast/value.hpp

@@ -13,11 +13,11 @@
 namespace blitz {
 	namespace ast {
 		enum class ValueType : int8_t {
-			Unknown,
-			Number,
-			Decimal,
-			String,
-			Type,
+			UNKNOWN,
+			INTEGER,
+			REAL,
+			STRING,
+			TYPE,
 		};
 
 		class ValueExpression : public expression {
@@ -39,7 +39,7 @@ namespace blitz {
 
 		class VariableExpression : public ValueExpression {
 			public:
-			VariableExpression(std::string& name, ValueType type = ValueType::Number);
+			VariableExpression(std::string& name, ValueType type = ValueType::INTEGER);
 			virtual ~VariableExpression();
 
 			virtual ValueType GetType() override;
@@ -82,4 +82,4 @@ namespace blitz {
 			std::string value;
 		};
 	}
-}
+}

code_compiler/source/compiler.cpp

@@ -2,6 +2,7 @@
 // Copyright (C) 2017-2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
 // AUTOGENERATED COPYRIGHT HEADER END
 #include "compiler.hpp"
+/*
 #include "parser.hpp"
 #include "lexer.hpp"
 #include <fstream>
@@ -10,3 +11,4 @@
 blitz::compiler::compiler() {}
 
 blitz::compiler::~compiler() {}
+*/

code_compiler/source/compiler.hpp

@@ -2,8 +2,6 @@
 // Copyright (C) 2017-2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
 // AUTOGENERATED COPYRIGHT HEADER END
 #pragma once
-#include <string>
-#include <filesystem>
 
 // Compiling requires several steps
 // 1. Lexing to known tokens
@@ -13,10 +11,16 @@
 // 3. Compiling from the AST to some kind of runnable binary.
 //   - In our case, we convert the AST to LLVM IR, and then compile it with LLVM.
 
+/*
+#include <filesystem>
+#include <string>
+
+
 namespace blitz {
 	class compiler {
 		public:
 		compiler();
 		~compiler();
 	};
-}
+} // namespace blitz
+*/

code_compiler/source/error.cpp

@@ -1,4 +1,28 @@
 // AUTOGENERATED COPYRIGHT HEADER START
-// Copyright (C) NaN-NaN undefined
 // Copyright (C) 2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
 // AUTOGENERATED COPYRIGHT HEADER END
+#include "error.hpp"
+
+blitz::error::~error() {}
+
+blitz::error::error(std::filesystem::path file, std::pair<uint64_t, uint64_t> base, std::pair<uint64_t, uint64_t> at, std::string reason) : std::runtime_error(reason)
+{
+	_file = file;
+	_base = base;
+	_at   = at;
+}
+
+std::filesystem::path const& blitz::error::file() const
+{
+	return _file;
+}
+
+std::pair<uint64_t, uint64_t> const& blitz::error::base() const
+{
+	return _base;
+}
+
+std::pair<uint64_t, uint64_t> const& blitz::error::at() const
+{
+	return _at;
+}

code_compiler/source/error.hpp

@@ -1,4 +1,27 @@
 // AUTOGENERATED COPYRIGHT HEADER START
-// Copyright (C) NaN-NaN undefined
 // Copyright (C) 2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
 // AUTOGENERATED COPYRIGHT HEADER END
+#pragma once
+#include <cinttypes>
+#include <filesystem>
+#include <stdexcept>
+#include <string>
+#include <utility>
+
+namespace blitz {
+	class error : public std::runtime_error {
+		std::filesystem::path         _file;
+		std::pair<uint64_t, uint64_t> _base;
+		std::pair<uint64_t, uint64_t> _at;
+
+		public:
+		~error();
+		error(std::filesystem::path file, std::pair<uint64_t, uint64_t> base, std::pair<uint64_t, uint64_t> at, std::string reason);
+
+		std::filesystem::path const& file() const;
+
+		std::pair<uint64_t, uint64_t> const& base() const;
+
+		std::pair<uint64_t, uint64_t> const& at() const;
+	};
+} // namespace blitz

code_compiler/source/lexer.cpp

@@ -3,55 +3,88 @@
 // AUTOGENERATED COPYRIGHT HEADER END
 #include "lexer.hpp"
 #include <codecvt>
+#include <cstdarg>
 #include <sstream>
 
-/*std::pair<char, blitz::tokentype> g_symbolCharacters[] = {
-	//{ '\"', BlitzLLVM::Lexer::Token::TokenDoubleQuote }, // Has special meaning.
-	{ '+', blitz::tokentype::TokenPlus },
-	{ '-', blitz::tokentype::TokenMinus },
-	{ '/', blitz:::tokentype::TokenSlashForward },
-	{ '\\', blitz::tokentype::TokenSlashBackward },
-	{ '*', blitz::tokentype::TokenMultiply },
-	{ '=', blitz::tokentype::TokenEqual },
-	{ '#', blitz::tokentype::TokenOctothorp },
-	{ '%', blitz::tokentype::TokenPercent },
-	{ '$', blitz::tokentype::TokenDollar },
-	{ '(', blitz::tokentype::TokenRoundBracketOpen },
-	{ ')', blitz::tokentype::TokenRoundBracketClose },
-	{ '[', blitz::tokentype::TokenSquareBracketOpen },
-	{ ']', blitz::tokentype::TokenSquareBracketClose },
-	{ '<', blitz::tokentype::TokenAngleBracketOpen },
-	{ '>', blitz::tokentype::TokenAngleBracketClose },
-	//{ '.', BlitzLLVM::Token::TokenDot }, // Special meaning.
-	{ ':', blitz::tokentype::TokenColon },
-	{ ',', blitz::tokentype::TokenComma },
-	//{ ';', BlitzLLVM::Token::TokenSemicolon },
-	{ '^', blitz::tokentype::TokenCaret },
-	{ '~', blitz::tokentype::TokenBitNot },
-};*/
+std::string format(const char* format, ...)
+{
+	va_list arg1;
+	va_list arg2;
+	va_start(arg1, format);
+	va_copy(arg2, arg1);
+	int               length = vsnprintf(nullptr, 0, format, arg1);
+	std::vector<char> buffer(length + 1);
+	vsnprintf(buffer.data(), buffer.size(), format, arg2);
+	va_end(arg1);
+	va_end(arg2);
+	return {buffer.data(), buffer.data() + length};
+}
+
+std::string blitz::token::to_string()
+{
+	std::string name;
+	switch (type) {
+	case variant::UNKNOWN:
+		name = "Unknown";
+		break;
+	case variant::ENDOFFILE:
+		name = "EndOfFile";
+		break;
+	case variant::NEWLINE:
+		name = "NewLine";
+		break;
+	case variant::CONTROL:
+		name = "Control";
+		break;
+	case variant::COMMENT:
+		name = "Comment";
+		break;
+	case variant::TEXT:
+		name = "Text";
+		break;
+	case variant::STRING:
+		name = "String";
+		break;
+	case variant::INTEGER:
+		name = "Integer";
+		break;
+	case variant::REAL:
+		name = "Real";
+		break;
+	case variant::SYMBOL:
+		name = "Symbol";
+		break;
+	default:
+		name = "How the fuck?!";
+		break;
+	}
+
+	if (type == variant::NEWLINE || type == variant::CONTROL) {
+		return format("%s(%llu@%llu, %d)", name.c_str(), location.first, location.second, text[0]);
+	} else {
+		return format("%s(%llu@%llu, %s)", name.c_str(), location.first, location.second, text.c_str());
+	}
+}
 
 blitz::lexer::~lexer() {}
 
 blitz::lexer::lexer(std::filesystem::path file)
 {
-	// Usually files start at line and character 0, so we should start there too.
-	_line = _character = 0;
+	// Usually files start at line 1 and character 1, so we should start there too.
+	_location = {1, 1};
 
 	// Try and open the file for reading.
 	_file   = file;
 	_stream = std::ifstream(_file, std::ios_base::binary); // We use binary so we can eventually support UTF-8.
 	if (!_stream.good() || _stream.eof() || _stream.bad() || _stream.fail()) {
-		char buffer[16384];
-		int  len = snprintf(buffer, sizeof(buffer), "Reading file '%s' failed.\0", file.generic_string().c_str());
-		throw std::runtime_error(std::string(buffer, buffer + len));
+		throw std::runtime_error(format("Reading file '%s' failed.", file.generic_string().c_str()));
 	}
 
 	// Initialize token storage to a default token.
 	_override = _current = blitz::token{
-		.line      = 0,
-		.character = 0,
-		.text      = "",
-		.type      = token::variant::UNKNOWN,
+		.location = {0, 0},
+		.text     = "",
+		.type     = token::variant::UNKNOWN,
 	};
 }
 
@@ -69,54 +102,272 @@ blitz::token blitz::lexer::next()
 		STRING,
 		COMMENT,
 	} state = stage::DEFAULT;
-	bool numberHasDot = false;
 
 	std::stringstream buffer;
 	blitz::token      token{
-			 .line      = _line,
-			 .character = _character,
-			 .text      = "",
-			 .type      = blitz::token::variant::UNKNOWN,
+			 .location = _location,
+			 .text     = "",
+			 .type     = blitz::token::variant::UNKNOWN,
     };
 
-	// Helper function to advance text.
-	auto advance = [this]() {
-		_character++;
-		return _stream.get();
+	auto issymbol = [](int chr) {
+		switch (chr) {
+		case ';': // Comment
+		case ':': // Command Separator
+		case '=': // Equal
+		case '<': // Less Than
+		case '>': // Greater Than
+		case '~': // Bitwise Not
+		case '^': // Exponential (X ^ Y = pow(X, Y))
+		case '+': // Plus
+		case '-': // Minus
+		case '*': // Multiply
+		case '/': // Divide
+		case ',': // Parameter Separation
+		case '%': // Integer Type
+		case '#': // Real Type
+		case '$': // String Type
+		case '.': // Structured Type
+		case '\\': // Structured Type Access
+			// Blitz Arrays
+		case '[':
+		case ']':
+			// Call, Grouping, Dim
+		case '(':
+		case ')':
+			return true;
+		default:
+			return false;
+		}
+		return false;
+	};
+	auto iswhitespace = [](int chr) {
+		switch (chr) {
+		case ' ':
+		case '\t':
+			return true;
+		default:
+			return false;
+		}
+		return false;
 	};
 
-	while ((token.type == blitz::token::variant::UNKNOWN) && _stream.good() && !_stream.eof()) {
-		auto chr = advance();
+	// ToDo: Figure out why we don't ever hit chr == EOF.
+	if (_stream.eof()) {
+		token.location = _location;
+		token.type     = blitz::token::variant::ENDOFFILE;
+		return token;
+	}
+
+	bool complete = false;
+	while (!complete && _stream.good()) {
+		// Peek at the current byte, without advancing the read pointer until we need to.
+		auto chr           = _stream.peek();
+		bool is_newline    = (chr == '\r') || (chr == '\n');
+		bool is_returnfeed = (chr == '\r');
 
 		if (state == stage::DEFAULT) {
-			if (chr == ';') { // We've encountered a comment, so we should change state and ignore this symbol.
-				state           = stage::COMMENT;
-				token.line      = _line;
-				token.character = _character;
-				token.type      = blitz::token::variant::COMMENT;
+			if (chr == EOF) {
+				token.type     = blitz::token::variant::ENDOFFILE;
+				token.text     = "";
+				token.location = _location;
+				complete       = true;
+				_location.second++;
+			} else if (is_newline) {
+				// New Line, should be handled like a control character, but with some special things.
+				token.type     = blitz::token::variant::NEWLINE;
+				token.text     = "\n";
+				token.location = _location;
+				complete       = true;
+
+				// Advance the read pointer.
+				_stream.get();
+
+				// Is this a Windows-style \r\n?
+				if (is_returnfeed && (_stream.peek() == '\n')) {
+					// If so, advance the read pointer again.
+					_stream.get();
+				}
+
+				// Then update the location.
+				_location.first++;
+				_location.second = 1;
+			} else if (iswhitespace(chr)) {
+				// This is white space, which we'll happily ignore.
+				_stream.get();
+				_location.second++;
+			} else if (chr < 32) {
+				// Likely to be a control character.
+				token.location = _location;
+				token.type     = blitz::token::variant::CONTROL;
+				token.text     = {1, char(chr)};
+				complete       = true;
+				_stream.get();
+				_location.second++;
+			} else if (chr == ':') {
+				// Allows code writers to pretend it's all one line.
+				token.location = _location;
+				token.type     = blitz::token::variant::SEPARATOR;
+				token.text     = {1, char(chr)};
+				complete       = true;
+				_stream.get();
+				_location.second++;
+			} else if (chr == ';') {
+				// A comment, which ends at the next new line.
+				state          = stage::COMMENT;
+				token.location = _location;
+				token.type     = blitz::token::variant::COMMENT;
+			} else if (isdigit(chr)) {
+				// Probably an Integer, or if the latter, it's a Real.
+				state          = stage::NUMBER;
+				token.location = _location;
+				token.type     = blitz::token::variant::INTEGER;
+			} else if (isalpha(chr)) {
+				// Text of some kind.
+				state          = stage::TEXT;
+				token.location = _location;
+				token.type     = blitz::token::variant::TEXT;
+			} else if (chr == '"') {
+				// A quoted string.
+				state          = stage::STRING;
+				token.location = _location;
+				token.type     = blitz::token::variant::STRING;
+
+				// Advance so we actually get anywhere.
+				_stream.get();
+				_location.second++;
+			} else if (issymbol(chr)) {
+				// Special Handling for a few symbols that could mean multiple things.
+				if (chr == '.') { // '.' can start a Real, Label or Structured Type Access. We don't want to decide on the latter here, that's a parser thing.
+					buffer << (char)chr;
+
+					// We advance the read pointer here to look at what's coming next.
+					_stream.get();
+					chr = _stream.peek();
+					_location.second++;
+
+					// Peek at what's coming next.
+					if (isdigit(chr)) {
+						// This is a Real number.
+						token.location = _location;
+						token.type     = blitz::token::variant::REAL;
+						state          = stage::NUMBER;
+					} else {
+						// Assume this is a symbol and return to normal behavior.
+						token.location = _location;
+						token.text     = buffer.str();
+						token.type     = blitz::token::variant::SYMBOL;
+						complete       = true;
+					}
+				} else if ((chr == '+') || (chr == '-')) { // '+' & '-' could be prefixes to an Integer or Real.
+					buffer << (char)chr;
+
+					// Advance the read pointer to peek at the future.
+					_stream.get();
+					chr = _stream.peek();
+					_location.second++;
+
+					// Peek at what's coming up.
+					if (isdigit(chr) || (chr == '.')) { // Likely to be a Real or Integer.
+						token.location = _location;
+						if (chr == '.') {
+							token.type = blitz::token::variant::REAL;
+						} else {
+							token.type = blitz::token::variant::INTEGER;
+						}
+						state = stage::NUMBER;
+					} else {
+						token.location = _location;
+						token.text     = buffer.str();
+						token.type     = blitz::token::variant::SYMBOL;
+						complete       = true;
+					}
+				} else {
+					token.location = _location;
+					token.text     = {1, char(chr)};
+					token.type     = blitz::token::variant::SYMBOL;
+					complete       = true;
+
+					// Advance so we actually get anywhere.
+					_stream.get();
+					_location.second++;
+				}
 			} else {
-				buffer << chr;
+				// Everything else is an error
+				throw blitz::error(_file, _location, _location, "You've encountered a bug. Please report this with the file that caused it.");
 			}
 		} else if (state == stage::NUMBER) {
-			if (isdigit(chr)) {
-				buffer << chr;
-			} else if (chr == '.')
-			{
-				if (numberHasDot) {
-					throw std::runtime_error("")
+			if ((chr == EOF) || (chr < 32) || is_newline || iswhitespace(chr) || (chr == ';')) {
+				// EOF, Control, NL, Whitespace, and Comments should return to default parsing.
+				complete = true;
+			} else if (isdigit(chr) || (chr == '.')) {
+				_stream.get();
+				buffer << (char)chr;
+				if (chr == '.') {
+					if (token.type != token::variant::REAL) {
+						token.type = blitz::token::variant::REAL;
+					} else {
+						token.text = buffer.str();
+						throw blitz::error(_file, token.location, _location, format("In token %s: Expected [0-9], got '%s' instead.", token.to_string().c_str(), std::string{1, (char)chr}.c_str()));
+					}
 				}
-				numberHasDot = true;
+			} else if (issymbol(chr)) {
+				complete = true;
 			} else {
-
+				token.text = buffer.str();
+				throw blitz::error(_file, token.location, _location, format("In token %s: Expected [0-9.], got '%s' instead.", token.to_string().c_str(), std::string{1, (char)chr}.c_str()));
 			}
 
-		} else if (state == stage::TEXT) {
-		} else if (state == stage::STRING) {
-		} else if (state == stage::COMMENT) {
-			if (chr == '\r' && _stream.peek() == '\n') {
+			if (complete) {
 				token.text = buffer.str();
+			}
+		} else if (state == stage::TEXT) {
+			if ((chr == EOF) || (chr < 32) || is_newline || iswhitespace(chr) || issymbol(chr)) {
+				// Return to default parsing.
+				complete = true;
+			} else if (isalpha(chr) || isdigit(chr) || (chr == '_')) {
+				buffer << (char)chr;
+				_stream.get();
+				_location.second++;
 			} else {
-				buffer << chr;
+				token.text = buffer.str();
+				throw blitz::error(_file, token.location, _location, format("In token %s: Expected [a-zA-Z0-9_], got '%s' instead.", token.to_string().c_str(), std::string{1, (char)chr}.c_str()));
+			}
+
+			if (complete) {
+				token.text = buffer.str();
+			}
+		} else if (state == stage::STRING) {
+			if ((chr == EOF) || (chr < 32) || is_newline) {
+				// Return to default parsing.
+				complete = true;
+			} else if (chr == '"') { // The only true way to end a string.
+				complete = true;
+
+				// Skip over the " so we don't confuse the parser.
+				_stream.get();
+				_location.second++;
+			} else {
+				buffer << (char)chr;
+				_stream.get();
+				_location.second++;
+			}
+
+			if (complete) {
+				token.text = buffer.str();
+			}
+		} else if (state == stage::COMMENT) {
+			if ((chr == EOF) || (chr < 32) || is_newline) {
+				// Return to default parsing at this point.
+				complete = true;
+			} else {
+				buffer << (char)chr;
+				_stream.get();
+				_location.second++;
+			}
+
+			if (complete) {
+				token.text = buffer.str();
 			}
 		}
 	}

code_compiler/source/lexer.hpp

@@ -2,34 +2,39 @@
 // Copyright (C) 2017-2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
 // AUTOGENERATED COPYRIGHT HEADER END
 #pragma once
+#include <cinttypes>
 #include <filesystem>
 #include <fstream>
-#include <inttypes.h>
 #include <iostream>
 #include <istream>
 #include <memory>
 #include <string>
 #include <utility>
 
+#include "error.hpp"
+
 // ToDo:
 // - Figure out a way to let the lexer output line and character information?
 
 namespace blitz {
 	struct token {
-		uint64_t    line;
-		uint64_t    character;
-
-		std::string text;
+		std::pair<uint64_t, uint64_t> location;
+		std::string                   text;
 		enum class variant : uint64_t {
 			UNKNOWN, // We have absolutely no fucking clue.
-			CONTROL, // All kinds of control signals, like NewLine, EndOfFile, ...
+			ENDOFFILE, // End of the file.
+			NEWLINE, // New Line.
+			SEPARATOR, // Command Separator.
+			CONTROL, // All kinds of control signals
 			SYMBOL, // All kinds of symbols.
-			TEXT, // HelloWorld
-			NUMBER, // 1, 1%
-			DECIMAL, // 1.0, 1#
-			STRING, // "HelloWorld"
 			COMMENT, // ; Whatever
+			TEXT, // HelloWorld
+			STRING, // "HelloWorld"
+			INTEGER, // 1, 1% (without the %)
+			REAL, // 1.0, 1# (without the #)
 		} type;
+
+		std::string to_string();
 	};
 
 	class lexer {
@@ -37,8 +42,7 @@ namespace blitz {
 		std::ifstream         _stream;
 
 		// Current location in the file.
-		uint64_t _line;
-		uint64_t _character;
+		std::pair<uint64_t, uint64_t> _location;
 
 		blitz::token _current;
 		blitz::token _override;

code_compiler/source/main.cpp

@@ -1,9 +1,92 @@
+// AUTOGENERATED COPYRIGHT HEADER START
+// Copyright (C) 2017-2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
+// AUTOGENERATED COPYRIGHT HEADER END
 #include <iostream>
 #include "compiler.hpp"
+#include "error.hpp"
+#include "lexer.hpp"
+
+int main(int argc, char** argv)
+{
+	std::cout << argv[1] << std::endl;
+	blitz::lexer lex(argv[1]);
+
+	try {
+		for (blitz::token token = lex.next(); (token.type != blitz::token::variant::ENDOFFILE); token = lex.next()) {
+			switch (token.type) {
+			case blitz::token::variant::COMMENT:
+				std::cout << token.text;
+				break;
+			case blitz::token::variant::SYMBOL:
+				std::cout << token.text << " ";
+				break;
+			case blitz::token::variant::TEXT:
+			case blitz::token::variant::INTEGER:
+			case blitz::token::variant::REAL:
+				std::cout << token.text << " ";
+				break;
+			case blitz::token::variant::STRING:
+				std::cout << "\"" << token.text << "\""
+						  << " ";
+				break;
+			case blitz::token::variant::NEWLINE:
+				std::cout << std::endl;
+				break;
+			default:
+				std::cout << token.to_string() << " ";
+				break;
+			}
+			if (token.type == blitz::token::variant::UNKNOWN) {
+				std::cin.get();
+			}
+		}
+	} catch (blitz::error const& ex) {
+		std::cout << ex.file() << std::endl;
+		std::cout << "Line " << ex.at().first << ", Char " << ex.at().second << ": " << ex.what() << std::endl;
+	} catch (std::runtime_error const& ex) {
+		std::cout << ex.what() << std::endl;
+	}
 
-int main(int argc, char** argv) {
-	blitz::compiler comp;
-	comp.compile(argv[1], std::string(argv[1]) + ".exe");
 	std::cin.get();
 	return 0;
 }
+
+// BlitzBasic is a strange but powerful language in the right hands. While it has
+// somewhat unusual syntax and rules at times, it does not usually have ambigious
+// syntax and rules like C and C++ do. Overall, the quirks can be easily explained
+// and shouldn't cause odd problems.
+//
+// 1. Variables can be automatically defined if you did not define them before.
+// ```
+// Local var1 ; Local Variable definition of var1
+// Global var2 ; Global Variable definition of var2
+// var1 = var3 ; Automatic definition of var3 as Local Variable
+// ```
+//
+// 2. Names are not unique, and case-insensitive
+// ```
+// Local myName ; Defines myName as Local
+// Local MyName ; Defines MyName as Local, should error because myName has already been defined.
+// Function myName() : End Function ; Defines myName as Function
+// Type myName ; Defines myName as Type
+//   Field Bla
+// End Type
+// ```
+//
+// 3. Function calls don't always need Parenthesis:
+// ```
+// Function myName() : End Function
+// If myName() Then : EndIf ; <- Calls myName
+// myName ; <- Calls myName, because there is no = after it.
+// ```
+//
+// 4. Int(TypeVariable) returns the pointer to the TypeVariable:
+// ```
+// Type myName
+//   Field Bla
+// End Type
+// Local myName.myName = New myName
+// Print Int(myName) ; <- Prints the address of the object contained in myName. 
+// ```
+//
+// As this is a Basic language, there is no concept of undefined or uninitialized anything. Every behavior is well defined.

code_compiler/source/parser.cpp

@@ -1,6 +1,7 @@
 /// AUTOGENERATED COPYRIGHT HEADER START
 // Copyright (C) 2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
 // AUTOGENERATED COPYRIGHT HEADER END
+/*
 #include "parser.hpp"
 #include "ast/function.hpp"
 #include <iostream>
@@ -111,3 +112,4 @@ std::unique_ptr<blitz::ast::DecimalExpression> blitz::parser::parse_decimal(blit
 
 	return std::make_unique<blitz::ast::DecimalExpression>(parsed);
 }
+*/

code_compiler/source/parser.hpp

@@ -2,14 +2,28 @@
 // Copyright (C) 2017-2024 Michael Fabian 'Xaymar' Dirks <info@xaymar.com>
 // AUTOGENERATED COPYRIGHT HEADER END
 #pragma once
-#include "lexer.hpp"
+#include <filesystem>
 #include "ast/ast.hpp"
-#include "ast/value.hpp"
+#include "lexer.hpp"
+
+namespace blitz {
+	class parser {
+		std::filesystem::path _file;
+
+		public:
+		~parser();
+		parser(std::filesystem::path file);
+	};
+} // namespace blitz
+
+/*
 #include <fstream>
 #include <map>
 #include <memory>
-#include <string>
 #include <stack>
+#include <string>
+#include "ast/value.hpp"
+#include "lexer.hpp"
 
 namespace blitz {
 	class parser {
@@ -37,3 +51,4 @@ namespace blitz {
 
 	};
 }
+*/