.

.zed/debug.json

@@ -0,0 +1,17 @@
+// Project-local debug tasks
+//
+// For more documentation on how to configure debug tasks,
+// see: https://zed.dev/docs/debugger
+[
+  {
+    "label": "Debug Test",
+    "build": {
+      "command": "make",
+      "args": ["-j8"],
+      "cwd": "$ZED_WORKTREE_ROOT/build",
+    },
+    "program": "$ZED_WORKTREE_ROOT/build/camellya_tests",
+    "request": "launch",
+    "adapter": "GDB",
+  },
+]

CMakeLists.txt

@@ -10,11 +10,10 @@ option(CAMELLYA_BUILD_CLI "Build command line interface" ON)
 
 # Library sources
 set(LIB_SOURCES
+    src/camellya.cpp
     src/lexer.cpp
     src/parser.cpp
     src/value.cpp
-    src/interpreter.cpp
-    src/state.cpp
     src/chunk.cpp
     src/compiler.cpp
     src/vm.cpp
@@ -27,8 +26,6 @@ set(LIB_HEADERS
     src/parser.h
     src/ast.h
     src/value.h
-    src/interpreter.h
-    src/state.h
     src/chunk.h
     src/compiler.h
     src/vm.h
@@ -72,6 +69,9 @@ if(CAMELLYA_BUILD_TESTS)
         tests/test_basic.cpp
         tests/test_utf8.cpp
         tests/test_vm.cpp
+        tests/test_list.cpp
+        tests/test_map_builtin.cpp
+        tests/test_generic_builtin.cpp
     )
 
     target_include_directories(camellya_tests

cli/main.cpp

@@ -1,22 +1,26 @@
 #include "camellya.h"
-#include <iostream>
-#include <format>
 #include <chrono>
+#include <format>
+#include <iostream>
 
 int main(int argc, char **argv) {
   if (argc < 2) {
     std::cout << std::format("Usage: chun <script> \n") << std::endl;
     return 0;
   }
-    std::chrono::high_resolution_clock::time_point start = std::chrono::high_resolution_clock::now();
-    camellya::State state;
-    bool success = state.do_file(argv[1]);
+  std::chrono::high_resolution_clock::time_point start =
+      std::chrono::high_resolution_clock::now();
+  camellya::Camellya c;
+  bool success = c.do_file(argv[1]);
   if (!success) {
-        std::cerr << "Error: " << state.get_error() << std::endl;
+    std::cerr << "Error: " << c.get_error() << std::endl;
     return 1;
   }
-    std::chrono::high_resolution_clock::time_point end = std::chrono::high_resolution_clock::now();
+  std::chrono::high_resolution_clock::time_point end =
+      std::chrono::high_resolution_clock::now();
   std::chrono::duration<double> duration = end - start;
-    std::cout << std::format("Execution completed in {} seconds. \n", duration.count()) << std::endl;
+  std::cout << std::format("Execution completed in {} seconds. \n",
+                           duration.count())
+            << std::endl;
   return 0;
 }

src/camellya.cpp

@@ -0,0 +1,171 @@
+#include "camellya.h"
+#include <fstream>
+#include <sstream>
+
+#include "compiler.h"
+#include "lexer.h"
+#include "parser.h"
+#include "vm.h"
+
+namespace camellya {
+
+class CamellyaImpl {
+public:
+  CamellyaImpl()
+      : vm(std::make_unique<VM>()), compiler(std::make_unique<Compiler>()),
+        stack(), last_error() {}
+  std::unique_ptr<VM> vm;
+  std::unique_ptr<Compiler> compiler;
+  std::vector<ValuePtr> stack;
+  std::string last_error;
+
+  bool execute_program(const Program &program) {
+    // Use VM
+    auto chunk = compiler->compile(program);
+    if (!chunk) {
+      last_error = compiler->get_error();
+      return false;
+    }
+
+    bool success = vm->execute(chunk);
+    if (!success) {
+      last_error = vm->get_error();
+    }
+    return success;
+  }
+};
+
+Camellya::Camellya() : d(std::make_unique<CamellyaImpl>()) {}
+
+Camellya::~Camellya() = default;
+
+bool Camellya::do_string(const std::string &script) {
+  try {
+    Lexer lexer(script);
+    auto tokens = lexer.tokenize();
+
+    Parser parser(std::move(tokens));
+    Program program = parser.parse();
+
+    bool success = d->execute_program(program);
+    if (success) {
+      d->last_error.clear();
+    }
+    return success;
+  } catch (const std::exception &e) {
+    d->last_error = e.what();
+    return false;
+  }
+}
+
+bool Camellya::do_file(const std::string &filename) {
+  std::ifstream file(filename);
+  if (!file.is_open()) {
+    d->last_error = "Failed to open file: " + filename;
+    return false;
+  }
+
+  std::stringstream buffer;
+  buffer << file.rdbuf();
+  return do_string(buffer.str());
+}
+
+void Camellya::register_function(const std::string &name, NativeFunction func) {
+  d->vm->register_native_function(name, func);
+}
+
+void Camellya::register_builtin_class(const std::string &type_name, std::shared_ptr<ClassValue> klass) {
+  d->vm->register_builtin_class(type_name, klass);
+}
+
+int Camellya::get_top() const { return static_cast<int>(d->stack.size()); }
+ValuePtr Camellya::get_global(const std::string &name) {
+  return d->vm->get_global(name);
+}
+
+void Camellya::set_global(const std::string &name, ValuePtr value) {
+  d->vm->set_global(name, value);
+}
+
+void Camellya::push_number(double value) {
+  d->stack.push_back(std::make_shared<NumberValue>(value));
+}
+
+void Camellya::push_string(const std::string &value) {
+  d->stack.push_back(std::make_shared<StringValue>(value));
+}
+
+void Camellya::push_bool(bool value) {
+  d->stack.push_back(std::make_shared<BoolValue>(value));
+}
+
+void Camellya::push_nil() { d->stack.push_back(std::make_shared<NilValue>()); }
+
+void Camellya::push_value(ValuePtr value) {
+  d->stack.push_back(std::move(value));
+}
+
+double Camellya::to_number(int index) {
+  ValuePtr val = get_stack_value(index);
+  if (val && val->type() == Type::NUMBER) {
+    return std::dynamic_pointer_cast<NumberValue>(val)->value;
+  }
+  return 0.0;
+}
+
+std::string Camellya::to_string(int index) {
+  ValuePtr val = get_stack_value(index);
+  if (val) {
+    return val->to_string();
+  }
+  return "";
+}
+
+bool Camellya::to_bool(int index) {
+  ValuePtr val = get_stack_value(index);
+  return is_truthy(val);
+}
+
+ValuePtr Camellya::to_value(int index) { return get_stack_value(index); }
+
+void Camellya::set_top(int index) {
+  if (index < 0) {
+    index = static_cast<int>(d->stack.size()) + index + 1;
+  }
+
+  if (index < 0) {
+    d->stack.clear();
+  } else if (static_cast<size_t>(index) < d->stack.size()) {
+    d->stack.resize(index);
+  } else {
+    while (static_cast<size_t>(index) > d->stack.size()) {
+      d->stack.push_back(std::make_shared<NilValue>());
+    }
+  }
+}
+
+void Camellya::pop(int n) {
+  if (n > static_cast<int>(d->stack.size())) {
+    d->stack.clear();
+  } else {
+    d->stack.resize(d->stack.size() - n);
+  }
+}
+
+ValuePtr Camellya::get_stack_value(int index) {
+  if (index < 0) {
+    index = static_cast<int>(d->stack.size()) + index;
+  } else {
+    index -= 1; // Convert to 0-based
+  }
+
+  if (index < 0 || static_cast<size_t>(index) >= d->stack.size()) {
+    return nullptr;
+  }
+
+  return d->stack[index];
+}
+
+const std::string &Camellya::get_error() const { return d->last_error; }
+
+} // namespace camellya

src/camellya.h

@@ -1,28 +1,62 @@
-#ifndef CAMELLYA_LIBRARY_H
-#define CAMELLYA_LIBRARY_H
+#ifndef CAMELLYA_STATE_H
+#define CAMELLYA_STATE_H
 
-// Camellya Scripting Language
-// A Lua-like scripting language with 0-based indexing,
-// distinct list/map types, and class support
-
-#include "state.h"
 #include "value.h"
-#include "lexer.h"
-#include "parser.h"
-#include "interpreter.h"
-#include "ast.h"
-#include "vm.h"
-#include "compiler.h"
-#include "chunk.h"
-#include "opcode.h"
-#include "exceptions.h"
+#include <memory>
+#include <string>
 
 namespace camellya {
 
-// Version info
-constexpr const char* VERSION = "0.1.0";
-constexpr const char* VERSION_NAME = "Camellya";
+// Main state class - similar to lua_State
+class CamellyaImpl;
+class Camellya {
+public:
+  Camellya();
+  ~Camellya();
+
+  // Execute script from string
+  bool do_string(const std::string &script);
+
+  // Execute script from file
+  bool do_file(const std::string &filename);
+
+  // Register native function
+  void register_function(const std::string &name, NativeFunction func);
+
+  // Register built-in class for any type (including user native types)
+  void register_builtin_class(const std::string &type_name, std::shared_ptr<ClassValue> klass);
+
+  // Get global variable
+  ValuePtr get_global(const std::string &name);
+
+  // Set global variable
+  void set_global(const std::string &name, ValuePtr value);
+
+  // Stack operations (Lua-like API)
+  void push_number(double value);
+  void push_string(const std::string &value);
+  void push_bool(bool value);
+  void push_nil();
+  void push_value(ValuePtr value);
+
+  double to_number(int index);
+  std::string to_string(int index);
+  bool to_bool(int index);
+  ValuePtr to_value(int index);
+
+  int get_top() const;
+  void set_top(int index);
+  void pop(int n = 1);
+
+  // Error handling
+  const std::string &get_error() const;
+
+private:
+  std::unique_ptr<CamellyaImpl> d;
+
+  ValuePtr get_stack_value(int index);
+};
 
 } // namespace camellya
 
-#endif // CAMELLYA_LIBRARY_H
+#endif // CAMELLYA_STATE_H

src/compiler.cpp

@@ -1,12 +1,10 @@
 #include "compiler.h"
-#include <iostream>
-#include <format>
+#include "exceptions.h"
 
 namespace camellya {
 
 Compiler::Compiler()
-    : current_chunk(nullptr), scope_depth(0), had_error(false) {
-}
+    : current_chunk(nullptr), scope_depth(0), had_error(false) {}
 
 std::shared_ptr<Chunk> Compiler::compile(const Program &program) {
   current_chunk = std::make_shared<Chunk>();
@@ -128,7 +126,8 @@ void Compiler::compile_unary(const UnaryExpr& expr) {
 }
 
 void Compiler::compile_literal(const LiteralExpr &expr) {
-    std::visit([this](auto&& arg) {
+  std::visit(
+      [this](auto &&arg) {
         using T = std::decay_t<decltype(arg)>;
         if constexpr (std::is_same_v<T, double>) {
           emit_constant(std::make_shared<NumberValue>(arg));
@@ -143,15 +142,18 @@ void Compiler::compile_literal(const LiteralExpr& expr) {
         } else {
           emit_opcode(OpCode::OP_NIL);
         }
-    }, expr.value);
+      },
+      expr.value);
 }
 
 void Compiler::compile_variable(const VariableExpr &expr) {
   int local = resolve_local(expr.name);
   if (local != -1) {
-        emit_bytes(static_cast<uint8_t>(OpCode::OP_GET_LOCAL), static_cast<uint8_t>(local));
+    emit_bytes(static_cast<uint8_t>(OpCode::OP_GET_LOCAL),
+               static_cast<uint8_t>(local));
   } else {
-        emit_bytes(static_cast<uint8_t>(OpCode::OP_GET_GLOBAL), identifier_constant(expr.name));
+    emit_bytes(static_cast<uint8_t>(OpCode::OP_GET_GLOBAL),
+               identifier_constant(expr.name));
   }
 }
 
@@ -160,9 +162,11 @@ void Compiler::compile_assign(const AssignExpr& expr) {
 
   int local = resolve_local(expr.name);
   if (local != -1) {
-        emit_bytes(static_cast<uint8_t>(OpCode::OP_SET_LOCAL), static_cast<uint8_t>(local));
+    emit_bytes(static_cast<uint8_t>(OpCode::OP_SET_LOCAL),
+               static_cast<uint8_t>(local));
   } else {
-        emit_bytes(static_cast<uint8_t>(OpCode::OP_SET_GLOBAL), identifier_constant(expr.name));
+    emit_bytes(static_cast<uint8_t>(OpCode::OP_SET_GLOBAL),
+               identifier_constant(expr.name));
   }
 }
 
@@ -262,7 +266,8 @@ void Compiler::compile_var_decl(const VarDecl& stmt) {
     // It's a class type - emit code to get the class and call it
     emit_bytes(static_cast<uint8_t>(OpCode::OP_GET_GLOBAL),
                identifier_constant(stmt.type_name));
-        emit_bytes(static_cast<uint8_t>(OpCode::OP_CALL), 0);  // Call with 0 arguments
+    emit_bytes(static_cast<uint8_t>(OpCode::OP_CALL),
+               0); // Call with 0 arguments
   } else {
     emit_opcode(OpCode::OP_NIL);
   }
@@ -528,7 +533,8 @@ void Compiler::compile_class_decl(const ClassDecl& stmt) {
       loops = std::move(prev_loops);
 
       auto func_decl_ptr = std::make_shared<FunctionDecl>(*func_decl);
-            auto func = std::make_shared<FunctionValue>(func_decl->name, func_decl_ptr, method_chunk);
+      auto func = std::make_shared<FunctionValue>(func_decl->name,
+                                                  func_decl_ptr, method_chunk);
       klass->add_method(func_decl->name, func);
     }
   }
@@ -545,9 +551,7 @@ void Compiler::emit_byte(uint8_t byte) {
   current_chunk->write(byte, 0); // Line number tracking could be improved
 }
 
-void Compiler::emit_opcode(OpCode op) {
-    emit_byte(static_cast<uint8_t>(op));
-}
+void Compiler::emit_opcode(OpCode op) { emit_byte(static_cast<uint8_t>(op)); }
 
 void Compiler::emit_bytes(uint8_t byte1, uint8_t byte2) {
   emit_byte(byte1);
@@ -565,9 +569,7 @@ size_t Compiler::emit_jump(OpCode op) {
   return current_chunk->current_offset() - 2;
 }
 
-void Compiler::patch_jump(size_t offset) {
-    current_chunk->patch_jump(offset);
-}
+void Compiler::patch_jump(size_t offset) { current_chunk->patch_jump(offset); }
 
 void Compiler::emit_loop(size_t loop_start) {
   emit_opcode(OpCode::OP_LOOP);
@@ -582,9 +584,7 @@ void Compiler::emit_loop(size_t loop_start) {
   emit_byte(offset & 0xff);
 }
 
-void Compiler::begin_scope() {
-    scope_depth++;
-}
+void Compiler::begin_scope() { scope_depth++; }
 
 void Compiler::end_scope() {
   scope_depth--;

src/compiler.h

@@ -4,9 +4,7 @@
 #include "ast.h"
 #include "chunk.h"
 #include "value.h"
-#include "exceptions.h"
 #include <memory>
-#include <map>
 #include <vector>
 
 namespace camellya {

src/interpreter.cpp

@@ -1,567 +0,0 @@
-#include "interpreter.h"
-#include <iostream>
-#include <format>
-#include <cmath>
-
-namespace camellya {
-
-Interpreter::Interpreter() {
-    global_environment = std::make_shared<Environment>();
-    environment = global_environment;
-    register_native_functions();
-}
-
-void Interpreter::register_native_functions() {
-    // print function - supports format strings
-    auto print_func = std::make_shared<FunctionValue>("print", 
-        [](const std::vector<ValuePtr>& args) -> ValuePtr {
-            if (args.empty()) {
-                std::cout << std::endl;
-                return std::make_shared<NilValue>();
-            }
-            
-            // Simple print: just concatenate all arguments
-            for (size_t i = 0; i < args.size(); ++i) {
-                if (i > 0) std::cout << " ";
-                std::cout << args[i]->to_string();
-            }
-            std::cout << std::endl;
-            
-            return std::make_shared<NilValue>();
-        });
-    global_environment->define("print", print_func);
-    
-    // len function
-    auto len_func = std::make_shared<FunctionValue>("len",
-        [](const std::vector<ValuePtr>& args) -> ValuePtr {
-            if (args.size() != 1) {
-                throw RuntimeError("len() expects 1 argument.");
-            }
-            
-            auto& arg = args[0];
-            if (arg->type() == Type::LIST) {
-                auto list = std::dynamic_pointer_cast<ListValue>(arg);
-                return std::make_shared<NumberValue>(static_cast<double>(list->size()));
-            } else if (arg->type() == Type::STRING) {
-                auto str = std::dynamic_pointer_cast<StringValue>(arg);
-                return std::make_shared<NumberValue>(static_cast<double>(str->value.length()));
-            } else if (arg->type() == Type::MAP) {
-                auto map = std::dynamic_pointer_cast<MapValue>(arg);
-                return std::make_shared<NumberValue>(static_cast<double>(map->pairs.size()));
-            }
-            
-            throw RuntimeError("len() expects list, string, or map.");
-        });
-    global_environment->define("len", len_func);
-}
-
-void Interpreter::execute(const Program& program) {
-    for (const auto& stmt : program.statements) {
-        execute_statement(*stmt);
-    }
-}
-
-ValuePtr Interpreter::evaluate(const Expr& expr) {
-    if (auto* binary = dynamic_cast<const BinaryExpr*>(&expr)) {
-        return eval_binary(*binary);
-    } else if (auto* unary = dynamic_cast<const UnaryExpr*>(&expr)) {
-        return eval_unary(*unary);
-    } else if (auto* literal = dynamic_cast<const LiteralExpr*>(&expr)) {
-        return eval_literal(*literal);
-    } else if (auto* variable = dynamic_cast<const VariableExpr*>(&expr)) {
-        return eval_variable(*variable);
-    } else if (auto* assign = dynamic_cast<const AssignExpr*>(&expr)) {
-        return eval_assign(*assign);
-    } else if (auto* call = dynamic_cast<const CallExpr*>(&expr)) {
-        return eval_call(*call);
-    } else if (auto* get = dynamic_cast<const GetExpr*>(&expr)) {
-        return eval_get(*get);
-    } else if (auto* set = dynamic_cast<const SetExpr*>(&expr)) {
-        return eval_set(*set);
-    } else if (auto* index = dynamic_cast<const IndexExpr*>(&expr)) {
-        return eval_index(*index);
-    } else if (auto* index_set = dynamic_cast<const IndexSetExpr*>(&expr)) {
-        return eval_index_set(*index_set);
-    } else if (auto* list = dynamic_cast<const ListExpr*>(&expr)) {
-        return eval_list(*list);
-    } else if (auto* map = dynamic_cast<const MapExpr*>(&expr)) {
-        return eval_map(*map);
-    }
-    
-    throw RuntimeError("Unknown expression type.");
-}
-
-void Interpreter::execute_statement(const Stmt& stmt) {
-    if (auto* expr_stmt = dynamic_cast<const ExprStmt*>(&stmt)) {
-        exec_expr_stmt(*expr_stmt);
-    } else if (auto* var_decl = dynamic_cast<const VarDecl*>(&stmt)) {
-        exec_var_decl(*var_decl);
-    } else if (auto* block = dynamic_cast<const BlockStmt*>(&stmt)) {
-        exec_block(*block);
-    } else if (auto* if_stmt = dynamic_cast<const IfStmt*>(&stmt)) {
-        exec_if(*if_stmt);
-    } else if (auto* while_stmt = dynamic_cast<const WhileStmt*>(&stmt)) {
-        exec_while(*while_stmt);
-    } else if (auto* for_stmt = dynamic_cast<const ForStmt*>(&stmt)) {
-        exec_for(*for_stmt);
-    } else if (auto* return_stmt = dynamic_cast<const ReturnStmt*>(&stmt)) {
-        exec_return(*return_stmt);
-    } else if (auto* break_stmt = dynamic_cast<const BreakStmt*>(&stmt)) {
-        exec_break(*break_stmt);
-    } else if (auto* continue_stmt = dynamic_cast<const ContinueStmt*>(&stmt)) {
-        exec_continue(*continue_stmt);
-    } else if (auto* func_decl = dynamic_cast<const FunctionDecl*>(&stmt)) {
-        exec_function_decl(*func_decl);
-    } else if (auto* class_decl = dynamic_cast<const ClassDecl*>(&stmt)) {
-        exec_class_decl(*class_decl);
-    }
-}
-
-ValuePtr Interpreter::eval_binary(const BinaryExpr& expr) {
-    ValuePtr left = evaluate(*expr.left);
-    ValuePtr right = evaluate(*expr.right);
-    
-    if (expr.op == "+") {
-        if (left->type() == Type::NUMBER && right->type() == Type::NUMBER) {
-            double l = std::dynamic_pointer_cast<NumberValue>(left)->value;
-            double r = std::dynamic_pointer_cast<NumberValue>(right)->value;
-            return std::make_shared<NumberValue>(l + r);
-        }
-        
-        if (left->type() == Type::STRING && right->type() == Type::STRING) {
-            const auto& l = std::dynamic_pointer_cast<StringValue>(left)->value;
-            const auto& r = std::dynamic_pointer_cast<StringValue>(right)->value;
-            return std::make_shared<StringValue>(l + r);
-        }
-        
-        throw RuntimeError("Operands of '+' must be both numbers or both strings.");
-    }
-    
-    if (expr.op == "-" || expr.op == "*" || 
-        expr.op == "/" || expr.op == "%") {
-        if (left->type() != Type::NUMBER || right->type() != Type::NUMBER) {
-            throw RuntimeError("Operands must be numbers.");
-        }
-        
-        double l = std::dynamic_pointer_cast<NumberValue>(left)->value;
-        double r = std::dynamic_pointer_cast<NumberValue>(right)->value;
-        
-        if (expr.op == "-") return std::make_shared<NumberValue>(l - r);
-        if (expr.op == "*") return std::make_shared<NumberValue>(l * r);
-        if (expr.op == "/") {
-            if (r == 0) throw RuntimeError("Division by zero.");
-            return std::make_shared<NumberValue>(l / r);
-        }
-        if (expr.op == "%") return std::make_shared<NumberValue>(std::fmod(l, r));
-    }
-    
-    if (expr.op == "==" ) {
-        return std::make_shared<BoolValue>(values_equal(left, right));
-    }
-    if (expr.op == "!=") {
-        return std::make_shared<BoolValue>(!values_equal(left, right));
-    }
-    
-    if (expr.op == "<" || expr.op == "<=" || expr.op == ">" || expr.op == ">=") {
-        if (left->type() != Type::NUMBER || right->type() != Type::NUMBER) {
-            throw RuntimeError("Operands must be numbers.");
-        }
-        
-        double l = std::dynamic_pointer_cast<NumberValue>(left)->value;
-        double r = std::dynamic_pointer_cast<NumberValue>(right)->value;
-        
-        if (expr.op == "<") return std::make_shared<BoolValue>(l < r);
-        if (expr.op == "<=") return std::make_shared<BoolValue>(l <= r);
-        if (expr.op == ">") return std::make_shared<BoolValue>(l > r);
-        if (expr.op == ">=") return std::make_shared<BoolValue>(l >= r);
-    }
-    
-    if (expr.op == "and") {
-        if (!is_truthy(left)) return left;
-        return right;
-    }
-    
-    if (expr.op == "or") {
-        if (is_truthy(left)) return left;
-        return right;
-    }
-    
-    throw RuntimeError("Unknown binary operator: " + expr.op);
-}
-
-ValuePtr Interpreter::eval_unary(const UnaryExpr& expr) {
-    ValuePtr operand = evaluate(*expr.operand);
-    
-    if (expr.op == "-") {
-        if (operand->type() != Type::NUMBER) {
-            throw RuntimeError("Operand must be a number.");
-        }
-        double value = std::dynamic_pointer_cast<NumberValue>(operand)->value;
-        return std::make_shared<NumberValue>(-value);
-    }
-    
-    if (expr.op == "!") {
-        return std::make_shared<BoolValue>(!is_truthy(operand));
-    }
-    
-    throw RuntimeError("Unknown unary operator: " + expr.op);
-}
-
-ValuePtr Interpreter::eval_literal(const LiteralExpr& expr) {
-    return std::visit([](auto&& arg) -> ValuePtr {
-        using T = std::decay_t<decltype(arg)>;
-        if constexpr (std::is_same_v<T, double>) {
-            return std::make_shared<NumberValue>(arg);
-        } else if constexpr (std::is_same_v<T, std::string>) {
-            return std::make_shared<StringValue>(arg);
-        } else if constexpr (std::is_same_v<T, bool>) {
-            return std::make_shared<BoolValue>(arg);
-        } else {
-            return std::make_shared<NilValue>();
-        }
-    }, expr.value);
-}
-
-ValuePtr Interpreter::eval_variable(const VariableExpr& expr) {
-    return environment->get(expr.name);
-}
-
-ValuePtr Interpreter::eval_assign(const AssignExpr& expr) {
-    ValuePtr value = evaluate(*expr.value);
-    environment->set(expr.name, value);
-    return value;
-}
-
-ValuePtr Interpreter::eval_call(const CallExpr& expr) {
-    ValuePtr callee = evaluate(*expr.callee);
-    
-    std::vector<ValuePtr> arguments;
-    for (const auto& arg : expr.arguments) {
-        arguments.push_back(evaluate(*arg));
-    }
-    
-    if (callee->type() == Type::FUNCTION) {
-        auto func = std::dynamic_pointer_cast<FunctionValue>(callee);
-        return call_function(*func, arguments);
-    } else if (callee->type() == Type::CLASS) {
-        // Class instantiation
-        auto klass = std::dynamic_pointer_cast<ClassValue>(callee);
-        auto instance = std::make_shared<InstanceValue>(klass);
-        
-        // If there is an init method, call it like a constructor
-        ValuePtr init_val = instance->get("init");
-        if (init_val && init_val->type() == Type::FUNCTION) {
-            auto init_func = std::dynamic_pointer_cast<FunctionValue>(init_val);
-            call_function(*init_func, arguments);
-        }
-        
-        return instance;
-    }
-    
-    throw RuntimeError("Can only call functions and classes.");
-}
-
-ValuePtr Interpreter::eval_get(const GetExpr& expr) {
-    ValuePtr object = evaluate(*expr.object);
-    
-    if (object->type() == Type::INSTANCE) {
-        auto instance = std::dynamic_pointer_cast<InstanceValue>(object);
-        return instance->get(expr.name);
-    }
-    
-    throw RuntimeError("Only instances have properties.");
-}
-
-ValuePtr Interpreter::eval_set(const SetExpr& expr) {
-    ValuePtr object = evaluate(*expr.object);
-    
-    if (object->type() == Type::INSTANCE) {
-        auto instance = std::dynamic_pointer_cast<InstanceValue>(object);
-        ValuePtr value = evaluate(*expr.value);
-        instance->set(expr.name, value);
-        return value;
-    }
-    
-    throw RuntimeError("Only instances have fields.");
-}
-
-ValuePtr Interpreter::eval_index(const IndexExpr& expr) {
-    ValuePtr object = evaluate(*expr.object);
-    ValuePtr index = evaluate(*expr.index);
-    
-    if (object->type() == Type::LIST) {
-        auto list = std::dynamic_pointer_cast<ListValue>(object);
-        if (index->type() != Type::NUMBER) {
-            throw RuntimeError("List index must be a number.");
-        }
-        size_t idx = static_cast<size_t>(std::dynamic_pointer_cast<NumberValue>(index)->value);
-        return list->get(idx);
-    } else if (object->type() == Type::MAP) {
-        auto map = std::dynamic_pointer_cast<MapValue>(object);
-        if (index->type() != Type::STRING) {
-            throw RuntimeError("Map key must be a string.");
-        }
-        std::string key = std::dynamic_pointer_cast<StringValue>(index)->value;
-        return map->get(key);
-    }
-    
-    throw RuntimeError("Only lists and maps support indexing.");
-}
-
-ValuePtr Interpreter::eval_index_set(const IndexSetExpr& expr) {
-    ValuePtr object = evaluate(*expr.object);
-    ValuePtr index = evaluate(*expr.index);
-    ValuePtr value = evaluate(*expr.value);
-    
-    if (object->type() == Type::LIST) {
-        auto list = std::dynamic_pointer_cast<ListValue>(object);
-        if (index->type() != Type::NUMBER) {
-            throw RuntimeError("List index must be a number.");
-        }
-        size_t idx = static_cast<size_t>(std::dynamic_pointer_cast<NumberValue>(index)->value);
-        list->set(idx, value);
-        return value;
-    } else if (object->type() == Type::MAP) {
-        auto map = std::dynamic_pointer_cast<MapValue>(object);
-        if (index->type() != Type::STRING) {
-            throw RuntimeError("Map key must be a string.");
-        }
-        std::string key = std::dynamic_pointer_cast<StringValue>(index)->value;
-        map->set(key, value);
-        return value;
-    }
-    
-    throw RuntimeError("Only lists and maps support index assignment.");
-}
-
-ValuePtr Interpreter::eval_list(const ListExpr& expr) {
-    auto list = std::make_shared<ListValue>();
-    for (const auto& elem : expr.elements) {
-        list->push(evaluate(*elem));
-    }
-    return list;
-}
-
-ValuePtr Interpreter::eval_map(const MapExpr& expr) {
-    auto map = std::make_shared<MapValue>();
-    for (const auto& [key_expr, value_expr] : expr.pairs) {
-        ValuePtr key = evaluate(*key_expr);
-        ValuePtr value = evaluate(*value_expr);
-        
-        if (key->type() != Type::STRING) {
-            throw RuntimeError("Map keys must be strings.");
-        }
-        
-        std::string key_str = std::dynamic_pointer_cast<StringValue>(key)->value;
-        map->set(key_str, value);
-    }
-    return map;
-}
-
-void Interpreter::exec_expr_stmt(const ExprStmt& stmt) {
-    evaluate(*stmt.expression);
-}
-
-void Interpreter::exec_var_decl(const VarDecl& stmt) {
-    ValuePtr value;
-    
-    if (stmt.initializer) {
-        value = evaluate(*stmt.initializer);
-        
-        // If type inference is needed, we use the value directly
-        if (stmt.infer_type) {
-            // Type is automatically inferred from the initializer value
-            environment->define(stmt.name, value);
-            return;
-        }
-        
-        // If explicit type is provided, verify the value matches
-        // (This is a simple check, could be more sophisticated)
-        if (!stmt.type_name.empty()) {
-            // Just use the value; type checking could be added here
-            environment->define(stmt.name, value);
-            return;
-        }
-    } else {
-        // No initializer, use default value based on type
-        value = create_default_value(stmt.type_name);
-    }
-    
-    environment->define(stmt.name, value);
-}
-
-void Interpreter::exec_block(const BlockStmt& stmt) {
-    auto previous = environment;
-    environment = std::make_shared<Environment>(environment);
-    
-    try {
-        for (const auto& statement : stmt.statements) {
-            execute_statement(*statement);
-        }
-    } catch (...) {
-        environment = previous;
-        throw;
-    }
-    
-    environment = previous;
-}
-
-void Interpreter::exec_if(const IfStmt& stmt) {
-    ValuePtr condition = evaluate(*stmt.condition);
-    
-    if (is_truthy(condition)) {
-        execute_statement(*stmt.then_branch);
-    } else if (stmt.else_branch) {
-        execute_statement(*stmt.else_branch);
-    }
-}
-
-void Interpreter::exec_while(const WhileStmt& stmt) {
-    try {
-        while (is_truthy(evaluate(*stmt.condition))) {
-            try {
-                execute_statement(*stmt.body);
-            } catch (const ContinueException&) {
-                // Continue: just proceed to the next iteration (check condition again)
-                continue;
-            }
-        }
-    } catch (const BreakException&) {
-        // Break: exit the loop
-    }
-}
-
-void Interpreter::exec_for(const ForStmt& stmt) {
-    auto previous = environment;
-    environment = std::make_shared<Environment>(environment);
-    
-    try {
-        if (stmt.initializer) {
-            execute_statement(*stmt.initializer);
-        }
-        
-        while (!stmt.condition || is_truthy(evaluate(*stmt.condition))) {
-            try {
-                execute_statement(*stmt.body);
-            } catch (const ContinueException&) {
-                // Continue: proceed to increment
-            }
-            
-            if (stmt.increment) {
-                evaluate(*stmt.increment);
-            }
-        }
-    } catch (const BreakException&) {
-        // Break: exit the loop
-    } catch (...) {
-        environment = previous;
-        throw;
-    }
-    
-    environment = previous;
-}
-
-void Interpreter::exec_return(const ReturnStmt& stmt) {
-    ValuePtr value = stmt.value ? evaluate(*stmt.value) : std::make_shared<NilValue>();
-    throw ReturnException(value);
-}
-
-void Interpreter::exec_break(const BreakStmt& stmt) {
-    throw BreakException();
-}
-
-void Interpreter::exec_continue(const ContinueStmt& stmt) {
-    throw ContinueException();
-}
-
-void Interpreter::exec_function_decl(const FunctionDecl& stmt) {
-    auto func_decl = std::make_shared<FunctionDecl>(stmt);
-    auto func = std::make_shared<FunctionValue>(stmt.name, func_decl);
-    environment->define(stmt.name, func);
-}
-
-void Interpreter::exec_class_decl(const ClassDecl& stmt) {
-    auto klass = std::make_shared<ClassValue>(stmt.name);
-    
-    for (const auto& member : stmt.members) {
-        if (auto* var_decl = dynamic_cast<VarDecl*>(member.get())) {
-            klass->add_field(var_decl->name, var_decl->type_name);
-        } else if (auto* func_decl = dynamic_cast<FunctionDecl*>(member.get())) {
-            auto func_decl_ptr = std::make_shared<FunctionDecl>(*func_decl);
-            auto func = std::make_shared<FunctionValue>(func_decl->name, func_decl_ptr);
-            klass->add_method(func_decl->name, func);
-        }
-    }
-    
-    environment->define(stmt.name, klass);
-}
-
-ValuePtr Interpreter::call_function(const FunctionValue& func, const std::vector<ValuePtr>& arguments) {
-    if (func.is_native) {
-        return func.native_func(arguments);
-    }
-    
-    // Bind parameters
-    if (func.declaration->parameters.size() != arguments.size()) {
-        throw RuntimeError(std::format("Expected {} arguments but got {}.", 
-                                      func.declaration->parameters.size(), 
-                                      arguments.size()));
-    }
-    
-    auto previous = environment;
-    environment = std::make_shared<Environment>(global_environment);
-    
-    // Bind 'this' for methods
-    if (func.bound_instance) {
-        environment->define("this", func.bound_instance);
-    }
-    
-    // Bind parameters to the new environment
-    for (size_t i = 0; i < arguments.size(); ++i) {
-        environment->define(func.declaration->parameters[i].second, arguments[i]);
-    }
-    
-    try {
-        execute_statement(*func.declaration->body);
-    } catch (const ReturnException& ret) {
-        environment = previous;
-        return ret.value;
-    }
-    
-    environment = previous;
-    return std::make_shared<NilValue>();
-}
-
-ValuePtr Interpreter::create_default_value(const std::string& type_name) {
-    if (type_name == "number") {
-        return std::make_shared<NumberValue>(0.0);
-    } else if (type_name == "string") {
-        return std::make_shared<StringValue>("");
-    } else if (type_name == "bool") {
-        return std::make_shared<BoolValue>(false);
-    } else if (type_name == "list") {
-        return std::make_shared<ListValue>();
-    } else if (type_name == "map") {
-        return std::make_shared<MapValue>();
-    } else if (environment->has(type_name)) {
-        // It's a class type
-        ValuePtr klass = environment->get(type_name);
-        if (klass->type() == Type::CLASS) {
-            auto klass_ptr = std::dynamic_pointer_cast<ClassValue>(klass);
-            auto instance = std::make_shared<InstanceValue>(klass_ptr);
-            
-            // If the class defines init(), call it with no arguments
-            ValuePtr init_val = instance->get("init");
-            if (init_val && init_val->type() == Type::FUNCTION) {
-                auto init_func = std::dynamic_pointer_cast<FunctionValue>(init_val);
-                call_function(*init_func, {});
-            }
-            
-            return instance;
-        }
-    }
-    
-    return std::make_shared<NilValue>();
-}
-
-} // namespace camellya

src/interpreter.h

@@ -1,151 +0,0 @@
-#ifndef CAMELLYA_INTERPRETER_H
-#define CAMELLYA_INTERPRETER_H
-
-#include "ast.h"
-#include "value.h"
-#include "exceptions.h"
-#include <map>
-#include <memory>
-
-namespace camellya {
-
-class ReturnException : public std::exception {
-public:
-    ValuePtr value;
-    explicit ReturnException(ValuePtr value) : value(std::move(value)) {}
-};
-
-class BreakException : public std::exception {};
-class ContinueException : public std::exception {};
-
-class Environment {
-public:
-    std::shared_ptr<Environment> parent;
-    std::map<std::string, ValuePtr> values;
-    
-    Environment() : parent(nullptr) {}
-    explicit Environment(std::shared_ptr<Environment> parent) : parent(std::move(parent)) {}
-    
-    void define(const std::string& name, ValuePtr value) {
-        values[name] = std::move(value);
-    }
-    
-    ValuePtr get(const std::string& name) const {
-        auto it = values.find(name);
-        if (it != values.end()) {
-            return it->second;
-        }
-        
-        if (parent && parent->has(name)) {
-            return parent->get(name);
-        }
-        
-        // Fallback: resolve as field on 'this' instance if present
-        const Environment* env = this;
-        while (env) {
-            auto this_it = env->values.find("this");
-            if (this_it != env->values.end() &&
-                this_it->second && this_it->second->type() == Type::INSTANCE) {
-                auto instance = std::dynamic_pointer_cast<InstanceValue>(this_it->second);
-                auto field_it = instance->fields.find(name);
-                if (field_it != instance->fields.end()) {
-                    return field_it->second;
-                }
-                break;
-            }
-            env = env->parent.get();
-        }
-        
-        throw RuntimeError("Undefined variable '" + name + "'.");
-    }
-    
-    void set(const std::string& name, ValuePtr value) {
-        auto it = values.find(name);
-        if (it != values.end()) {
-            it->second = std::move(value);
-            return;
-        }
-        
-        if (parent && parent->has(name)) {
-            parent->set(name, std::move(value));
-            return;
-        }
-        
-        // Fallback: assign to field on 'this' instance if present
-        Environment* env = this;
-        while (env) {
-            auto this_it = env->values.find("this");
-            if (this_it != env->values.end() &&
-                this_it->second && this_it->second->type() == Type::INSTANCE) {
-                auto instance = std::dynamic_pointer_cast<InstanceValue>(this_it->second);
-                auto field_it = instance->fields.find(name);
-                if (field_it != instance->fields.end()) {
-                    field_it->second = std::move(value);
-                    return;
-                }
-                break;
-            }
-            env = env->parent.get();
-        }
-        
-        throw RuntimeError("Undefined variable '" + name + "'.");
-    }
-    
-    bool has(const std::string& name) const {
-        if (values.find(name) != values.end()) {
-            return true;
-        }
-        if (parent) {
-            return parent->has(name);
-        }
-        return false;
-    }
-};
-
-class Interpreter {
-public:
-    Interpreter();
-    
-    void execute(const Program& program);
-    ValuePtr evaluate(const Expr& expr);
-    void execute_statement(const Stmt& stmt);
-    
-    std::shared_ptr<Environment> environment;
-    std::shared_ptr<Environment> global_environment;
-    
-private:
-    void register_native_functions();
-    
-    ValuePtr eval_binary(const BinaryExpr& expr);
-    ValuePtr eval_unary(const UnaryExpr& expr);
-    ValuePtr eval_literal(const LiteralExpr& expr);
-    ValuePtr eval_variable(const VariableExpr& expr);
-    ValuePtr eval_assign(const AssignExpr& expr);
-    ValuePtr eval_call(const CallExpr& expr);
-    ValuePtr eval_get(const GetExpr& expr);
-    ValuePtr eval_set(const SetExpr& expr);
-    ValuePtr eval_index(const IndexExpr& expr);
-    ValuePtr eval_index_set(const IndexSetExpr& expr);
-    ValuePtr eval_list(const ListExpr& expr);
-    ValuePtr eval_map(const MapExpr& expr);
-    
-    void exec_expr_stmt(const ExprStmt& stmt);
-    void exec_var_decl(const VarDecl& stmt);
-    void exec_block(const BlockStmt& stmt);
-    void exec_if(const IfStmt& stmt);
-    void exec_while(const WhileStmt& stmt);
-    void exec_for(const ForStmt& stmt);
-    void exec_return(const ReturnStmt& stmt);
-    void exec_break(const BreakStmt& stmt);
-    void exec_continue(const ContinueStmt& stmt);
-    void exec_function_decl(const FunctionDecl& stmt);
-    void exec_class_decl(const ClassDecl& stmt);
-    
-    ValuePtr call_function(const FunctionValue& func, const std::vector<ValuePtr>& arguments);
-    
-    ValuePtr create_default_value(const std::string& type_name);
-};
-
-} // namespace camellya
-
-#endif // CAMELLYA_INTERPRETER_H

src/state.cpp

@@ -1,174 +0,0 @@
-#include "state.h"
-#include <fstream>
-#include <sstream>
-
-namespace camellya {
-
-State::State(ExecutionMode mode) 
-    : execution_mode_(mode),
-      interpreter_(std::make_unique<Interpreter>()),
-      vm_(std::make_unique<VM>()),
-      compiler_(std::make_unique<Compiler>()) {}
-
-bool State::do_string(const std::string& script) {
-    try {
-        Lexer lexer(script);
-        auto tokens = lexer.tokenize();
-        
-        Parser parser(std::move(tokens));
-        Program program = parser.parse();
-        
-        bool success = execute_program(program);
-        if (success) {
-            last_error_.clear();
-        }
-        return success;
-    } catch (const std::exception& e) {
-        last_error_ = e.what();
-        return false;
-    }
-}
-
-bool State::do_file(const std::string& filename) {
-    std::ifstream file(filename);
-    if (!file.is_open()) {
-        last_error_ = "Failed to open file: " + filename;
-        return false;
-    }
-    
-    std::stringstream buffer;
-    buffer << file.rdbuf();
-    return do_string(buffer.str());
-}
-
-void State::register_function(const std::string& name, NativeFunction func) {
-    auto func_value = std::make_shared<FunctionValue>(name, func);
-    
-    if (execution_mode_ == ExecutionMode::INTERPRETER) {
-        interpreter_->global_environment->define(name, func_value);
-    } else {
-        vm_->register_native_function(name, func);
-    }
-}
-
-ValuePtr State::get_global(const std::string& name) {
-    if (execution_mode_ == ExecutionMode::INTERPRETER) {
-        return interpreter_->global_environment->get(name);
-    } else {
-        return vm_->get_global(name);
-    }
-}
-
-void State::set_global(const std::string& name, ValuePtr value) {
-    if (execution_mode_ == ExecutionMode::INTERPRETER) {
-        interpreter_->global_environment->define(name, value);
-    } else {
-        vm_->set_global(name, value);
-    }
-}
-
-void State::push_number(double value) {
-    stack_.push_back(std::make_shared<NumberValue>(value));
-}
-
-void State::push_string(const std::string& value) {
-    stack_.push_back(std::make_shared<StringValue>(value));
-}
-
-void State::push_bool(bool value) {
-    stack_.push_back(std::make_shared<BoolValue>(value));
-}
-
-void State::push_nil() {
-    stack_.push_back(std::make_shared<NilValue>());
-}
-
-void State::push_value(ValuePtr value) {
-    stack_.push_back(std::move(value));
-}
-
-double State::to_number(int index) {
-    ValuePtr val = get_stack_value(index);
-    if (val && val->type() == Type::NUMBER) {
-        return std::dynamic_pointer_cast<NumberValue>(val)->value;
-    }
-    return 0.0;
-}
-
-std::string State::to_string(int index) {
-    ValuePtr val = get_stack_value(index);
-    if (val) {
-        return val->to_string();
-    }
-    return "";
-}
-
-bool State::to_bool(int index) {
-    ValuePtr val = get_stack_value(index);
-    return is_truthy(val);
-}
-
-ValuePtr State::to_value(int index) {
-    return get_stack_value(index);
-}
-
-void State::set_top(int index) {
-    if (index < 0) {
-        index = static_cast<int>(stack_.size()) + index + 1;
-    }
-    
-    if (index < 0) {
-        stack_.clear();
-    } else if (static_cast<size_t>(index) < stack_.size()) {
-        stack_.resize(index);
-    } else {
-        while (static_cast<size_t>(index) > stack_.size()) {
-            stack_.push_back(std::make_shared<NilValue>());
-        }
-    }
-}
-
-void State::pop(int n) {
-    if (n > static_cast<int>(stack_.size())) {
-        stack_.clear();
-    } else {
-        stack_.resize(stack_.size() - n);
-    }
-}
-
-ValuePtr State::get_stack_value(int index) {
-    if (index < 0) {
-        index = static_cast<int>(stack_.size()) + index;
-    } else {
-        index -= 1; // Convert to 0-based
-    }
-    
-    if (index < 0 || static_cast<size_t>(index) >= stack_.size()) {
-        return nullptr;
-    }
-    
-    return stack_[index];
-}
-
-bool State::execute_program(const Program& program) {
-    if (execution_mode_ == ExecutionMode::INTERPRETER) {
-        // Use tree-walking interpreter
-        interpreter_->execute(program);
-        return true;
-    } else {
-        // Use VM
-        auto chunk = compiler_->compile(program);
-        if (!chunk) {
-            last_error_ = compiler_->get_error();
-            return false;
-        }
-        
-        bool success = vm_->execute(chunk);
-        if (!success) {
-            last_error_ = vm_->get_error();
-        }
-        return success;
-    }
-}
-
-} // namespace camellya

src/state.h

@@ -1,81 +0,0 @@
-#ifndef CAMELLYA_STATE_H
-#define CAMELLYA_STATE_H
-
-#include "lexer.h"
-#include "parser.h"
-#include "interpreter.h"
-#include "vm.h"
-#include "compiler.h"
-#include "value.h"
-#include <string>
-#include <memory>
-
-namespace camellya {
-
-// Execution mode
-enum class ExecutionMode {
-    INTERPRETER,  // Tree-walking interpreter
-    VM           // Bytecode VM
-};
-
-// Main state class - similar to lua_State
-class State {
-public:
-    State(ExecutionMode mode = ExecutionMode::VM);
-    ~State() = default;
-    
-    // Set execution mode
-    void set_execution_mode(ExecutionMode mode) { execution_mode_ = mode; }
-    ExecutionMode get_execution_mode() const { return execution_mode_; }
-    
-    // Execute script from string
-    bool do_string(const std::string& script);
-    
-    // Execute script from file
-    bool do_file(const std::string& filename);
-    
-    // Register native function
-    void register_function(const std::string& name, NativeFunction func);
-    
-    // Get global variable
-    ValuePtr get_global(const std::string& name);
-    
-    // Set global variable
-    void set_global(const std::string& name, ValuePtr value);
-    
-    // Stack operations (Lua-like API)
-    void push_number(double value);
-    void push_string(const std::string& value);
-    void push_bool(bool value);
-    void push_nil();
-    void push_value(ValuePtr value);
-    
-    double to_number(int index);
-    std::string to_string(int index);
-    bool to_bool(int index);
-    ValuePtr to_value(int index);
-    
-    int get_top() const { return static_cast<int>(stack_.size()); }
-    void set_top(int index);
-    void pop(int n = 1);
-    
-    // Error handling
-    const std::string& get_error() const { return last_error_; }
-    
-private:
-    ExecutionMode execution_mode_;
-    std::unique_ptr<Interpreter> interpreter_;
-    std::unique_ptr<VM> vm_;
-    std::unique_ptr<Compiler> compiler_;
-    std::vector<ValuePtr> stack_;
-    std::string last_error_;
-    
-    ValuePtr get_stack_value(int index);
-    
-    // Helper for execution
-    bool execute_program(const Program& program);
-};
-
-} // namespace camellya
-
-#endif // CAMELLYA_STATE_H

src/value.cpp

@@ -1,7 +1,7 @@
 #include "value.h"
-#include <sstream>
-#include <iomanip>
 #include <cmath>
+#include <iomanip>
+#include <sstream>
 
 namespace camellya {
 
@@ -13,7 +13,8 @@ std::string NumberValue::to_string() const {
   oss << std::fixed << std::setprecision(6) << value;
   std::string str = oss.str();
   str.erase(str.find_last_not_of('0') + 1, std::string::npos);
-    if (str.back() == '.') str.pop_back();
+  if (str.back() == '.')
+    str.pop_back();
   return str;
 }
 
@@ -21,7 +22,8 @@ std::string ListValue::to_string() const {
   std::ostringstream oss;
   oss << "[";
   for (size_t i = 0; i < elements.size(); ++i) {
-        if (i > 0) oss << ", ";
+    if (i > 0)
+      oss << ", ";
     oss << elements[i]->to_string();
   }
   oss << "]";
@@ -56,7 +58,8 @@ std::string MapValue::to_string() const {
   oss << "{";
   bool first = true;
   for (const auto &[key, value] : pairs) {
-        if (!first) oss << ", ";
+    if (!first)
+      oss << ", ";
     first = false;
     oss << key << ": " << value->to_string();
   }
@@ -106,9 +109,7 @@ ValuePtr InstanceValue::get(const std::string& name) const {
   auto method_it = klass->methods.find(name);
   if (method_it != klass->methods.end()) {
     auto bound = std::make_shared<FunctionValue>(*method_it->second);
-        auto self = std::static_pointer_cast<InstanceValue>(
-            const_cast<InstanceValue*>(this)->shared_from_this());
-        bound->bound_instance = self;
+    bound->bound_instance = const_cast<InstanceValue *>(this)->shared_from_this();
     return bound;
   }
 

src/value.h

@@ -24,13 +24,15 @@ enum class Type {
     MAP,
     FUNCTION,
     CLASS,
-    INSTANCE
+    INSTANCE,
+    NATIVE
 };
 
-class Value {
+class Value : public std::enable_shared_from_this<Value> {
 public:
     virtual ~Value() = default;
     virtual Type type() const = 0;
+    virtual std::string type_name() const = 0;
     virtual std::string to_string() const = 0;
     virtual ValuePtr clone() const = 0;
 };
@@ -38,6 +40,7 @@ public:
 class NilValue : public Value {
 public:
     Type type() const override { return Type::NIL; }
+    std::string type_name() const override { return "nil"; }
     std::string to_string() const override { return "nil"; }
     ValuePtr clone() const override { return std::make_shared<NilValue>(); }
 };
@@ -48,6 +51,7 @@ public:
     
     explicit NumberValue(double value) : value(value) {}
     Type type() const override { return Type::NUMBER; }
+    std::string type_name() const override { return "number"; }
     std::string to_string() const override;
     ValuePtr clone() const override { return std::make_shared<NumberValue>(value); }
 };
@@ -58,6 +62,7 @@ public:
     
     explicit StringValue(std::string value) : value(std::move(value)) {}
     Type type() const override { return Type::STRING; }
+    std::string type_name() const override { return "string"; }
     std::string to_string() const override { return value; }
     ValuePtr clone() const override { return std::make_shared<StringValue>(value); }
 };
@@ -68,6 +73,7 @@ public:
     
     explicit BoolValue(bool value) : value(value) {}
     Type type() const override { return Type::BOOL; }
+    std::string type_name() const override { return "bool"; }
     std::string to_string() const override { return value ? "true" : "false"; }
     ValuePtr clone() const override { return std::make_shared<BoolValue>(value); }
 };
@@ -80,6 +86,7 @@ public:
     explicit ListValue(std::vector<ValuePtr> elements) : elements(std::move(elements)) {}
     
     Type type() const override { return Type::LIST; }
+    std::string type_name() const override { return "list"; }
     std::string to_string() const override;
     ValuePtr clone() const override;
     
@@ -97,6 +104,7 @@ public:
     explicit MapValue(std::map<std::string, ValuePtr> pairs) : pairs(std::move(pairs)) {}
     
     Type type() const override { return Type::MAP; }
+    std::string type_name() const override { return "map"; }
     std::string to_string() const override;
     ValuePtr clone() const override;
     
@@ -120,12 +128,12 @@ public:
     std::shared_ptr<Chunk> chunk;
     NativeFunction native_func;
     bool is_native;
-    std::shared_ptr<InstanceValue> bound_instance;
+    ValuePtr bound_instance;
     
     // Script function
     FunctionValue(std::string name, std::shared_ptr<FunctionDecl> declaration,
                   std::shared_ptr<Chunk> chunk = nullptr,
-                  std::shared_ptr<InstanceValue> bound_instance = nullptr)
+                  ValuePtr bound_instance = nullptr)
         : name(std::move(name)), declaration(std::move(declaration)),
           chunk(std::move(chunk)), is_native(false), 
           bound_instance(std::move(bound_instance)) {}
@@ -135,6 +143,7 @@ public:
         : name(std::move(name)), native_func(std::move(func)), is_native(true) {}
     
     Type type() const override { return Type::FUNCTION; }
+    std::string type_name() const override { return "function"; }
     std::string to_string() const override { return "<function " + name + ">"; }
     ValuePtr clone() const override { return std::make_shared<FunctionValue>(*this); }
 };
@@ -148,6 +157,7 @@ public:
     explicit ClassValue(std::string name) : name(std::move(name)) {}
     
     Type type() const override { return Type::CLASS; }
+    std::string type_name() const override { return "class"; }
     std::string to_string() const override { return "<class " + name + ">"; }
     ValuePtr clone() const override;
     
@@ -160,7 +170,7 @@ public:
     }
 };
 
-class InstanceValue : public Value, public std::enable_shared_from_this<InstanceValue> {
+class InstanceValue : public Value {
 public:
     std::shared_ptr<ClassValue> klass;
     std::map<std::string, ValuePtr> fields;
@@ -173,6 +183,7 @@ public:
     }
     
     Type type() const override { return Type::INSTANCE; }
+    std::string type_name() const override { return klass->name; }
     std::string to_string() const override { return "<instance of " + klass->name + ">"; }
     ValuePtr clone() const override;
     
@@ -180,6 +191,18 @@ public:
     void set(const std::string& name, ValuePtr value);
 };
 
+class NativeValue : public Value {
+public:
+    std::string _type_name;
+    
+    explicit NativeValue(std::string type_name) : _type_name(std::move(type_name)) {}
+    
+    Type type() const override { return Type::NATIVE; }
+    std::string type_name() const override { return _type_name; }
+    std::string to_string() const override { return "<native " + _type_name + ">"; }
+    ValuePtr clone() const override { return std::make_shared<NativeValue>(_type_name); }
+};
+
 // Helper functions
 inline bool is_truthy(const ValuePtr& value) {
     if (!value || value->type() == Type::NIL) return false;

src/vm.cpp

@@ -1,5 +1,4 @@
 #include "vm.h"
-#include "interpreter.h"
 #include <iostream>
 #include <format>
 #include <cmath>
@@ -212,6 +211,9 @@ bool VM::run() {
                     if (func->is_native) {
                         // Native function call
                         std::vector<ValuePtr> args;
+                        if (func->bound_instance) {
+                            args.push_back(func->bound_instance);
+                        }
                         for (int i = arg_count - 1; i >= 0; i--) {
                             args.push_back(peek(i));
                         }
@@ -424,7 +426,18 @@ bool VM::run() {
                     auto instance = std::dynamic_pointer_cast<InstanceValue>(object);
                     push(instance->get(name));
                 } else {
-                    runtime_error("Only instances have properties.");
+                    auto it = builtin_classes.find(object->type_name());
+                    if (it != builtin_classes.end()) {
+                        auto klass = it->second;
+                        auto method_it = klass->methods.find(name);
+                        if (method_it != klass->methods.end()) {
+                            auto bound = std::make_shared<FunctionValue>(*method_it->second);
+                            bound->bound_instance = object;
+                            push(bound);
+                            break;
+                        }
+                    }
+                    runtime_error("Only instances and types with registered built-in classes have properties/methods.");
                     return false;
                 }
                 break;
@@ -613,6 +626,67 @@ void VM::register_builtin_functions() {
             throw RuntimeError("len() expects list, string, or map.");
         });
     globals["len"] = len_func;
+
+    // Define list class
+    auto list_klass = std::make_shared<ClassValue>("list");
+    list_klass->add_method("push", std::make_shared<FunctionValue>("push",
+        [](const std::vector<ValuePtr>& args) -> ValuePtr {
+            if (args.size() != 2) throw RuntimeError("list.push() expects 1 argument.");
+            auto list = std::dynamic_pointer_cast<ListValue>(args[0]);
+            list->push(args[1]);
+            return args[1];
+        }));
+    list_klass->add_method("pop", std::make_shared<FunctionValue>("pop",
+        [](const std::vector<ValuePtr>& args) -> ValuePtr {
+            if (args.size() != 1) throw RuntimeError("list.pop() expects 0 arguments.");
+            auto list = std::dynamic_pointer_cast<ListValue>(args[0]);
+            if (list->elements.empty()) return std::make_shared<NilValue>();
+            ValuePtr val = list->elements.back();
+            list->elements.pop_back();
+            return val;
+        }));
+    list_klass->add_method("len", std::make_shared<FunctionValue>("len",
+        [](const std::vector<ValuePtr>& args) -> ValuePtr {
+            if (args.size() != 1) throw RuntimeError("list.len() expects 0 arguments.");
+            auto list = std::dynamic_pointer_cast<ListValue>(args[0]);
+            return std::make_shared<NumberValue>(static_cast<double>(list->size()));
+        }));
+    register_builtin_class("list", list_klass);
+
+    // Define map class
+    auto map_klass = std::make_shared<ClassValue>("map");
+    map_klass->add_method("set", std::make_shared<FunctionValue>("set",
+        [](const std::vector<ValuePtr>& args) -> ValuePtr {
+            if (args.size() != 3) throw RuntimeError("map.set() expects 2 arguments.");
+            auto map = std::dynamic_pointer_cast<MapValue>(args[0]);
+            if (args[1]->type() != Type::STRING) throw RuntimeError("Map key must be a string.");
+            std::string key = std::dynamic_pointer_cast<StringValue>(args[1])->value;
+            map->set(key, args[2]);
+            return args[2];
+        }));
+    map_klass->add_method("get", std::make_shared<FunctionValue>("get",
+        [](const std::vector<ValuePtr>& args) -> ValuePtr {
+            if (args.size() != 2) throw RuntimeError("map.get() expects 1 argument.");
+            auto map = std::dynamic_pointer_cast<MapValue>(args[0]);
+            if (args[1]->type() != Type::STRING) throw RuntimeError("Map key must be a string.");
+            std::string key = std::dynamic_pointer_cast<StringValue>(args[1])->value;
+            return map->get(key);
+        }));
+    map_klass->add_method("has", std::make_shared<FunctionValue>("has",
+        [](const std::vector<ValuePtr>& args) -> ValuePtr {
+            if (args.size() != 2) throw RuntimeError("map.has() expects 1 argument.");
+            auto map = std::dynamic_pointer_cast<MapValue>(args[0]);
+            if (args[1]->type() != Type::STRING) throw RuntimeError("Map key must be a string.");
+            std::string key = std::dynamic_pointer_cast<StringValue>(args[1])->value;
+            return std::make_shared<BoolValue>(map->has(key));
+        }));
+    map_klass->add_method("len", std::make_shared<FunctionValue>("len",
+        [](const std::vector<ValuePtr>& args) -> ValuePtr {
+            if (args.size() != 1) throw RuntimeError("map.len() expects 0 arguments.");
+            auto map = std::dynamic_pointer_cast<MapValue>(args[0]);
+            return std::make_shared<NumberValue>(static_cast<double>(map->pairs.size()));
+        }));
+    register_builtin_class("map", map_klass);
 }
 
 void VM::register_native_function(const std::string& name, NativeFunction func) {
@@ -620,6 +694,11 @@ void VM::register_native_function(const std::string& name, NativeFunction func)
     globals[name] = func_value;
 }
 
+void VM::register_builtin_class(const std::string& type_name, std::shared_ptr<ClassValue> klass) {
+    builtin_classes[type_name] = klass;
+    globals[klass->name] = klass;
+}
+
 void VM::set_global(const std::string& name, ValuePtr value) {
     globals[name] = value;
 }

src/vm.h

@@ -34,6 +34,9 @@ public:
     // Register native functions
     void register_native_function(const std::string& name, NativeFunction func);
     
+    // Register built-in classes for types (like list, map)
+    void register_builtin_class(const std::string& type_name, std::shared_ptr<ClassValue> klass);
+    
     // Global variable access
     void set_global(const std::string& name, ValuePtr value);
     ValuePtr get_global(const std::string& name);
@@ -48,6 +51,7 @@ private:
     std::vector<CallFrame> frames;
     CallFrame* current_frame;
     std::map<std::string, ValuePtr> globals;
+    std::map<std::string, std::shared_ptr<ClassValue>> builtin_classes;
     std::string error_message;
     
     // Main execution loop

tests/test_basic.cpp

@@ -1,13 +1,13 @@
-#include <catch2/catch_test_macros.hpp>
-#include <catch2/benchmark/catch_benchmark.hpp>
 #include "camellya.h"
+#include <catch2/benchmark/catch_benchmark.hpp>
+#include <catch2/catch_test_macros.hpp>
 
 #include <memory>
 
 using namespace camellya;
 
 TEST_CASE("basic arithmetic", "[script]") {
-    State state;
+  Camellya state;
   const char *script = R"(
         var x = 10;
         var y = 20;
@@ -26,7 +26,7 @@ TEST_CASE("basic arithmetic", "[script]") {
 }
 
 TEST_CASE("basic function", "[script][func]") {
-    State state;
+  Camellya state;
   const char *script = R"(
         func add(number x, number y) -> number {
             return x + y;
@@ -46,7 +46,7 @@ TEST_CASE("basic function", "[script][func]") {
 }
 
 TEST_CASE("list indexing is 0-based", "[list]") {
-    State state;
+  Camellya state;
   const char *script = R"(
         var numbers = [10, 20, 30];
     )";
@@ -75,7 +75,7 @@ TEST_CASE("list indexing is 0-based", "[list]") {
 }
 
 TEST_CASE("class init is called on declaration", "[class][init]") {
-    State state;
+  Camellya state;
   const char *script = R"(
         class Person {
             var age : number;
@@ -124,8 +124,7 @@ TEST_CASE("class init is called on declaration", "[class][init]") {
 }
 
 TEST_CASE("interpreter performance: simple loop", "[perf][script]") {
-    State state;
-    State state_vm(ExecutionMode::VM);
+  Camellya state;
   const char *script = R"(
         func sum_to(number n) -> number {
             var s = 0;
@@ -149,22 +148,10 @@ TEST_CASE("interpreter performance: simple loop", "[perf][script]") {
     auto r_num = std::dynamic_pointer_cast<NumberValue>(r_val);
     REQUIRE(r_num->value == 499500.0);
   };
-
-     BENCHMARK("state_vm sum_to(1000)") {     
-        if (!state_vm.do_string(script)) {
-            auto last_error = state_vm.get_error();
-            REQUIRE(last_error.empty());
-        }
-        auto r_val = state_vm.get_global("r");
-        REQUIRE(r_val);
-        REQUIRE(r_val->type() == Type::NUMBER);
-        auto r_num = std::dynamic_pointer_cast<NumberValue>(r_val);
-        REQUIRE(r_num->value == 499500.0);
-    };
 }
 
 TEST_CASE("loop break", "[script][loop]") {
-    State state;
+  Camellya state;
   const char *script = R"(
         var sum = 0;
         for (var i = 0; i < 10; i = i + 1) {
@@ -183,7 +170,7 @@ TEST_CASE("loop break", "[script][loop]") {
 }
 
 TEST_CASE("loop continue", "[script][loop]") {
-    State state;
+  Camellya state;
   const char *script = R"(
         var sum = 0;
         for (var i = 0; i < 5; i = i + 1) {
@@ -202,7 +189,7 @@ TEST_CASE("loop continue", "[script][loop]") {
 }
 
 TEST_CASE("while break and continue", "[script][loop]") {
-    State state;
+  Camellya state;
   const char *script = R"(
         var i = 0;
         var sum = 0;

tests/test_generic_builtin.cpp

@@ -0,0 +1,59 @@
+#include "camellya.h"
+#include "exceptions.h"
+#include <catch2/catch_all.hpp>
+#include <cmath>
+
+using namespace camellya;
+
+// Simple Vector3D wrapper for testing
+class Vector3DValue : public NativeValue {
+public:
+    double x, y, z;
+    Vector3DValue(double x, double y, double z) : NativeValue("Vector3D"), x(x), y(y), z(z) {}
+    
+    std::string to_string() const override {
+        return "Vector3D(" + std::to_string(x) + ", " + std::to_string(y) + ", " + std::to_string(z) + ")";
+    }
+    
+    ValuePtr clone() const override {
+        return std::make_shared<Vector3DValue>(x, y, z);
+    }
+};
+
+TEST_CASE("Generic built-in class (Vector3D) test", "[generic]") {
+    Camellya c;
+    
+    // 1. Create the ClassValue for Vector3D
+    auto v3d_klass = std::make_shared<ClassValue>("Vector3D");
+    
+    // 2. Add a native method 'length'
+    v3d_klass->add_method("length", std::make_shared<FunctionValue>("length",
+        [](const std::vector<ValuePtr>& args) -> ValuePtr {
+            if (args.size() != 1) throw RuntimeError("Vector3D.length() expects 0 arguments.");
+            auto vec = std::dynamic_pointer_cast<Vector3DValue>(args[0]);
+            double len = std::sqrt(vec->x * vec->x + vec->y * vec->y + vec->z * vec->z);
+            return std::make_shared<NumberValue>(len);
+        }));
+    
+    // 3. Register it as a built-in class for type "Vector3D"
+    c.register_builtin_class("Vector3D", v3d_klass);
+    
+    // 4. Register a factory function to create Vector3D instances from script
+    c.register_function("Vector3D", [](const std::vector<ValuePtr>& args) -> ValuePtr {
+        if (args.size() != 3) throw RuntimeError("Vector3D() expects 3 arguments.");
+        double x = std::dynamic_pointer_cast<NumberValue>(args[0])->value;
+        double y = std::dynamic_pointer_cast<NumberValue>(args[1])->value;
+        double z = std::dynamic_pointer_cast<NumberValue>(args[2])->value;
+        return std::make_shared<Vector3DValue>(x, y, z);
+    });
+
+    SECTION("vector3d methods") {
+        REQUIRE(c.do_string(R"(
+            var v = Vector3D(3, 4, 0);
+            var len = v.length();
+        )"));
+        
+        auto len = c.get_global("len");
+        REQUIRE(std::dynamic_pointer_cast<NumberValue>(len)->value == 5.0);
+    }
+}

tests/test_list.cpp

@@ -0,0 +1,18 @@
+#include "camellya.h"
+#include <catch2/catch_all.hpp>
+
+using namespace camellya;
+TEST_CASE("Basic List test", "[list]") {
+  Camellya c;
+
+  SECTION("len function") {
+    REQUIRE(c.do_string(R"(
+            var arr = [1, 2, 3, 4];
+            var size = len(arr);
+            arr.push(5);
+            size = arr.len();
+        )"));
+    auto size = c.get_global("size");
+    REQUIRE(std::dynamic_pointer_cast<NumberValue>(size)->value == 5.0);
+  }
+}

tests/test_map_builtin.cpp

@@ -0,0 +1,32 @@
+#include "camellya.h"
+#include <catch2/catch_all.hpp>
+
+using namespace camellya;
+
+TEST_CASE("Map built-in class test", "[map]") {
+    Camellya c;
+
+    SECTION("map methods") {
+        REQUIRE(c.do_string(R"(
+            var m = {"a": 1, "b": 2};
+            var s1 = m.len();
+            m.set("c", 3);
+            var s2 = m.len();
+            var has_a = m.has("a");
+            var has_z = m.has("z");
+            var val_b = m.get("b");
+        )"));
+        
+        auto s1 = c.get_global("s1");
+        auto s2 = c.get_global("s2");
+        auto has_a = c.get_global("has_a");
+        auto has_z = c.get_global("has_z");
+        auto val_b = c.get_global("val_b");
+
+        REQUIRE(std::dynamic_pointer_cast<NumberValue>(s1)->value == 2.0);
+        REQUIRE(std::dynamic_pointer_cast<NumberValue>(s2)->value == 3.0);
+        REQUIRE(std::dynamic_pointer_cast<BoolValue>(has_a)->value == true);
+        REQUIRE(std::dynamic_pointer_cast<BoolValue>(has_z)->value == false);
+        REQUIRE(std::dynamic_pointer_cast<NumberValue>(val_b)->value == 2.0);
+    }
+}

tests/test_vm.cpp

@@ -1,10 +1,10 @@
-#include <catch2/catch_test_macros.hpp>
 #include "src/camellya.h"
+#include <catch2/catch_test_macros.hpp>
 
 using namespace camellya;
 
 TEST_CASE("VM - Basic arithmetic", "[vm]") {
-    State state(ExecutionMode::VM);
+  Camellya state;
 
   SECTION("Addition") {
     REQUIRE(state.do_string("var x = 10 + 20;"));
@@ -37,7 +37,7 @@ TEST_CASE("VM - Basic arithmetic", "[vm]") {
 }
 
 TEST_CASE("VM - Variables and assignment", "[vm]") {
-    State state(ExecutionMode::VM);
+  Camellya state;
 
   SECTION("Variable declaration and initialization") {
     REQUIRE(state.do_string("var a = 42;"));
@@ -57,19 +57,20 @@ TEST_CASE("VM - Variables and assignment", "[vm]") {
 }
 
 TEST_CASE("VM - String operations", "[vm]") {
-    State state(ExecutionMode::VM);
+  Camellya state;
 
   SECTION("String concatenation") {
     REQUIRE(state.do_string(R"(var greeting = "Hello" + " " + "World";)"));
     auto greeting = state.get_global("greeting");
     REQUIRE(greeting != nullptr);
     REQUIRE(greeting->type() == Type::STRING);
-        REQUIRE(std::dynamic_pointer_cast<StringValue>(greeting)->value == "Hello World");
+    REQUIRE(std::dynamic_pointer_cast<StringValue>(greeting)->value ==
+            "Hello World");
   }
 }
 
 TEST_CASE("VM - Comparison operators", "[vm]") {
-    State state(ExecutionMode::VM);
+  Camellya state;
 
   SECTION("Equality") {
     REQUIRE(state.do_string("var eq = 10 == 10;"));
@@ -91,7 +92,7 @@ TEST_CASE("VM - Comparison operators", "[vm]") {
 }
 
 TEST_CASE("VM - Lists", "[vm]") {
-    State state(ExecutionMode::VM);
+  Camellya state;
 
   SECTION("Create list") {
     REQUIRE(state.do_string("var numbers = [1, 2, 3, 4, 5];"));
@@ -113,7 +114,7 @@ TEST_CASE("VM - Lists", "[vm]") {
 }
 
 TEST_CASE("VM - Maps", "[vm]") {
-    State state(ExecutionMode::VM);
+  Camellya state;
 
   SECTION("Create map") {
     REQUIRE(state.do_string(R"(var person = {"name": "Alice", "age": "30"};)"));
@@ -134,7 +135,7 @@ TEST_CASE("VM - Maps", "[vm]") {
 }
 
 TEST_CASE("VM - If statements", "[vm]") {
-    State state(ExecutionMode::VM);
+  Camellya state;
 
   SECTION("If branch taken") {
     REQUIRE(state.do_string(R"(
@@ -162,7 +163,7 @@ TEST_CASE("VM - If statements", "[vm]") {
 }
 
 TEST_CASE("VM - While loops", "[vm]") {
-    State state(ExecutionMode::VM);
+  Camellya state;
 
   SECTION("While loop") {
     REQUIRE(state.do_string(R"(
@@ -179,7 +180,7 @@ TEST_CASE("VM - While loops", "[vm]") {
 }
 
 TEST_CASE("VM - Native functions", "[vm]") {
-    State state(ExecutionMode::VM);
+  Camellya state;
 
   SECTION("len function") {
     REQUIRE(state.do_string(R"(
@@ -190,80 +191,3 @@ TEST_CASE("VM - Native functions", "[vm]") {
     REQUIRE(std::dynamic_pointer_cast<NumberValue>(size)->value == 4.0);
   }
 }
-
-TEST_CASE("VM vs Interpreter - Same results", "[vm][interpreter]") {
-    const char* script = R"(
-        var x = 10;
-        var y = 20;
-        var sum = x + y;
-        var product = x * y;
-    )";
-    
-    State vm_state(ExecutionMode::VM);
-    State interp_state(ExecutionMode::INTERPRETER);
-    
-    REQUIRE(vm_state.do_string(script));
-    REQUIRE(interp_state.do_string(script));
-    
-    auto vm_sum = vm_state.get_global("sum");
-    auto interp_sum = interp_state.get_global("sum");
-    REQUIRE(std::dynamic_pointer_cast<NumberValue>(vm_sum)->value == 
-            std::dynamic_pointer_cast<NumberValue>(interp_sum)->value);
-    
-    auto vm_product = vm_state.get_global("product");
-    auto interp_product = interp_state.get_global("product");
-    REQUIRE(std::dynamic_pointer_cast<NumberValue>(vm_product)->value == 
-            std::dynamic_pointer_cast<NumberValue>(interp_product)->value);
-}
-
-TEST_CASE("class init is called on declaration", "[vm][class][init]") {
-    State state(ExecutionMode::VM);
-    const char* script = R"(
-        class Person {
-            var age : number;
-            var name : string;
-
-            func init() -> nil {
-                age = 18;
-                name = "Default";
-            }
-
-            func getAge() -> number {
-                return this.age;
-            }
-        }
-
-        var p : Person;
-        var a = p.getAge();
-    )";
-
-    auto ret = state.do_string(script);
-    if(!ret) {
-        REQUIRE(state.get_error() == "");
-    }
-
-    auto p_val = state.get_global("p");
-    REQUIRE(p_val);
-    REQUIRE(p_val->type() == Type::INSTANCE);
-
-    auto instance = std::dynamic_pointer_cast<InstanceValue>(p_val);
-    REQUIRE(instance);
-
-    auto age_val = instance->get("age");
-    auto name_val = instance->get("name");
-
-    REQUIRE(age_val->type() == Type::NUMBER);
-    REQUIRE(name_val->type() == Type::STRING);
-
-    auto age_num = std::dynamic_pointer_cast<NumberValue>(age_val);
-    auto name_str = std::dynamic_pointer_cast<StringValue>(name_val);
-
-    REQUIRE(age_num->value == 18.0);
-    REQUIRE(name_str->value == "Default");
-
-    auto a_val = state.get_global("a");
-    REQUIRE(a_val);
-    REQUIRE(a_val->type() == Type::NUMBER);
-    auto a_num = std::dynamic_pointer_cast<NumberValue>(a_val);
-    REQUIRE(a_num->value == 18.0);
-}