headers/Interpreter.h

@@ -12,46 +12,6 @@
 #include <memory>
 #include <unordered_map>
 #include <stack>
-#include <optional>
-#include <functional>
-
-// Forward declaration
-class Interpreter;
-
-// RAII helper for thunk execution flag
-struct ScopedThunkFlag {
-    bool& flag;
-    bool prev;
-    ScopedThunkFlag(bool& f) : flag(f), prev(f) { flag = true; }
-    ~ScopedThunkFlag() { flag = prev; }
-};
-
-// RAII helper for environment management
-struct ScopedEnv {
-    std::shared_ptr<Environment>& target;
-    std::shared_ptr<Environment> prev;
-    ScopedEnv(std::shared_ptr<Environment>& e) : target(e), prev(e) {}
-    ~ScopedEnv() { target = prev; }
-};
-
-// Thunk class for trampoline-based tail call optimization
-class Thunk {
-public:
-    using ThunkFunction = std::function<Value()>;
-    
-    explicit Thunk(ThunkFunction func) : func(std::move(func)) {}
-    
-    Value execute() const {
-        return func();
-    }
-    
-    bool isThunk() const { return true; }
-    
-private:
-    ThunkFunction func;
-};
-
-
 
 class Interpreter : public ExprVisitor, public StmtVisitor {
 
@@ -86,21 +46,14 @@ private:
     std::vector<std::shared_ptr<BuiltinFunction> > builtinFunctions;
     std::vector<std::shared_ptr<Function> > functions;
     ErrorReporter* errorReporter;
-    bool inThunkExecution = false;
-    
-
     
     Value evaluate(const std::shared_ptr<Expr>& expr);
-    Value evaluateWithoutTrampoline(const std::shared_ptr<Expr>& expr);
     bool isEqual(Value a, Value b);
     bool isWholeNumer(double num);
     void execute(const std::shared_ptr<Stmt>& statement, ExecutionContext* context = nullptr);
     void executeBlock(std::vector<std::shared_ptr<Stmt> > statements, std::shared_ptr<Environment> env, ExecutionContext* context = nullptr);
     void addStdLibFunctions();
     
-    // Trampoline execution
-    Value runTrampoline(Value initialResult);
-    
 public:
     bool isTruthy(Value object);
     std::string stringify(Value object);

headers/Value.h

@@ -11,17 +11,15 @@
 class Environment;
 class Function;
 class BuiltinFunction;
-class Thunk;
 
 // Type tags for the Value union
-enum ValueType {
+enum ValueType : uint8_t {
     VAL_NONE,
     VAL_NUMBER,
     VAL_BOOLEAN,
     VAL_STRING,
     VAL_FUNCTION,
-    VAL_BUILTIN_FUNCTION,
+    VAL_BUILTIN_FUNCTION
-    VAL_THUNK
 };
 
 // Tagged value system (like Lua) - no heap allocation for simple values
@@ -31,7 +29,6 @@ struct Value {
         bool boolean;
         Function* function;
         BuiltinFunction* builtin_function;
-        Thunk* thunk;
     };
     ValueType type;
     std::string string_value; // Store strings outside the union for safety
@@ -45,7 +42,6 @@ struct Value {
     Value(std::string&& s) : type(ValueType::VAL_STRING), string_value(std::move(s)) {}
     Value(Function* f) : function(f), type(ValueType::VAL_FUNCTION) {}
     Value(BuiltinFunction* bf) : builtin_function(bf), type(ValueType::VAL_BUILTIN_FUNCTION) {}
-    Value(Thunk* t) : thunk(t), type(ValueType::VAL_THUNK) {}
 
     // Move constructor
     Value(Value&& other) noexcept 
@@ -98,7 +94,6 @@ struct Value {
     inline bool isString() const { return type == ValueType::VAL_STRING; }
     inline bool isFunction() const { return type == ValueType::VAL_FUNCTION; }
     inline bool isBuiltinFunction() const { return type == ValueType::VAL_BUILTIN_FUNCTION; }
-    inline bool isThunk() const { return type == ValueType::VAL_THUNK; }
     inline bool isNone() const { return type == ValueType::VAL_NONE; }
 
     // Value extraction (safe, with type checking) - inline for performance
@@ -107,7 +102,6 @@ struct Value {
     inline const std::string& asString() const { return string_value; }
     inline Function* asFunction() const { return isFunction() ? function : nullptr; }
     inline BuiltinFunction* asBuiltinFunction() const { return isBuiltinFunction() ? builtin_function : nullptr; }
-    inline Thunk* asThunk() const { return isThunk() ? thunk : nullptr; }
 
     // Truthiness check - inline for performance
     inline bool isTruthy() const {
@@ -118,7 +112,6 @@ struct Value {
             case ValueType::VAL_STRING: return !string_value.empty();
             case ValueType::VAL_FUNCTION: return function != nullptr;
             case ValueType::VAL_BUILTIN_FUNCTION: return builtin_function != nullptr;
-            case ValueType::VAL_THUNK: return thunk != nullptr;
             default: return false;
         }
     }
@@ -134,7 +127,6 @@ struct Value {
             case ValueType::VAL_STRING: return string_value == other.string_value;
             case ValueType::VAL_FUNCTION: return function == other.function;
             case ValueType::VAL_BUILTIN_FUNCTION: return builtin_function == other.builtin_function;
-            case ValueType::VAL_THUNK: return thunk == other.thunk;
             default: return false;
         }
     }
@@ -159,7 +151,6 @@ struct Value {
             case ValueType::VAL_STRING: return string_value;
             case ValueType::VAL_FUNCTION: return "<function>";
             case ValueType::VAL_BUILTIN_FUNCTION: return "<builtin_function>";
-            case ValueType::VAL_THUNK: return "<thunk>";
             default: return "unknown";
         }
     }

headers/bob.h

@@ -8,7 +8,7 @@
 #include "../headers/helperFunctions/ShortHands.h"
 #include "../headers/ErrorReporter.h"
 
-#define VERSION "0.0.2"
+#define VERSION "0.0.1"
 
 class Bob
 {

source/Interpreter.cpp

@@ -24,10 +24,6 @@ struct ReturnContext {
     ReturnContext() : returnValue(NONE_VALUE), hasReturn(false) {}
 };
 
-// Trampoline-based tail call optimization - no exceptions needed
-
-
-
 
 Value Interpreter::visitLiteralExpr(const std::shared_ptr<LiteralExpr>& expr) {
     if(expr->isNull) return NONE_VALUE;
@@ -600,12 +596,7 @@ Value Interpreter::visitCallExpr(const std::shared_ptr<CallExpr>& expression) {
                                    " arguments but got " + std::to_string(arguments.size()) + ".");
         }
         
-        // Check if this is a tail call
+        auto previousEnv = environment;
-        if (expression->isTailCall) {
-            // Create a thunk for tail call optimization
-            auto thunk = new Thunk([this, function, arguments]() -> Value {
-                // Use RAII to manage environment
-                ScopedEnv _env(environment);
         environment = std::make_shared<Environment>(function->closure);
         environment->setErrorReporter(errorReporter);
         
@@ -616,45 +607,16 @@ Value Interpreter::visitCallExpr(const std::shared_ptr<CallExpr>& expression) {
         ExecutionContext context;
         context.isFunctionBody = true;
         
-                // Use RAII to manage thunk execution flag
-                ScopedThunkFlag _inThunk(inThunkExecution);
-                
-                // Execute function body
         for (const auto& stmt : function->body) {
             execute(stmt, &context);
             if (context.hasReturn) {
+                environment = previousEnv;
                 return context.returnValue;
             }
         }
         
+        environment = previousEnv;
         return context.returnValue;
-            });
-            
-            // Return the thunk as a Value
-            return Value(thunk);
-        } else {
-            // Normal function call - create new environment
-            ScopedEnv _env(environment);
-            environment = std::make_shared<Environment>(function->closure);
-            environment->setErrorReporter(errorReporter);
-            
-            for (size_t i = 0; i < function->params.size(); i++) {
-                environment->define(function->params[i], arguments[i]);
-            }
-            
-            ExecutionContext context;
-            context.isFunctionBody = true;
-            
-            // Execute function body
-            for (const auto& stmt : function->body) {
-                execute(stmt, &context);
-                if (context.hasReturn) {
-                    return context.returnValue;
-                }
-            }
-            
-            return context.returnValue;
-        }
     }
     
     throw std::runtime_error("Can only call functions and classes.");
@@ -720,8 +682,6 @@ void Interpreter::visitReturnStmt(const std::shared_ptr<ReturnStmt>& statement,
 {
     Value value = NONE_VALUE;
     if (statement->value != nullptr) {
-        // For tail calls, the trampoline handling is done in visitCallExpr
-        // We just need to evaluate normally
         value = evaluate(statement->value);
     }
     
@@ -771,28 +731,9 @@ void Interpreter::executeBlock(std::vector<std::shared_ptr<Stmt> > statements, s
 }
 
 Value Interpreter::evaluate(const std::shared_ptr<Expr>& expr) {
-    Value result = expr->accept(this);
-    if (inThunkExecution) {
-        return result; // Don't use trampoline when inside a thunk
-    }
-    return runTrampoline(result);
-}
-
-Value Interpreter::evaluateWithoutTrampoline(const std::shared_ptr<Expr>& expr) {
     return expr->accept(this);
 }
 
-Value Interpreter::runTrampoline(Value initialResult) {
-    Value current = initialResult;
-    
-    while (current.isThunk()) {
-        // Execute the thunk to get the next result
-        current = current.asThunk()->execute();
-    }
-    
-    return current;
-}
-
 bool Interpreter::isTruthy(Value object) {
 
     if(object.isBoolean())

source/Lexer.cpp

@@ -421,7 +421,7 @@ std::vector<Token> Lexer::Tokenize(std::string source){
         }
         
     }
-    tokens.push_back({END_OF_FILE, "eof", line, column});
+    tokens.push_back({END_OF_FILE, "eof", line});
     return tokens;
 }
 

source/bob.cpp

@@ -33,7 +33,7 @@ void Bob::runPrompt()
 {
     this->interpreter = msptr(Interpreter)(true);
 
-    cout << "Bob v" << VERSION << ", 2025" << endl;
+    cout << "Bob v" << VERSION << ", 2023" << endl;
     for(;;)
     {
         string line;

tco.bob

@@ -1,13 +0,0 @@
-func countdown(n)
-{
-
-	if(n == 0)
-		return 0;
-	
-	print(n);	
-
-	return countdown(n - 1);
-
-}
-
-countdown(1000000);