text: /*
     +----------------------------------------------------------------------+
     | Zend Engine                                                          |
     +----------------------------------------------------------------------+
     | Copyright (c) 1998-2014 Zend Technologies Ltd. (http://www.zend.com) |
     +----------------------------------------------------------------------+
     | This source file is subject to version 2.00 of the Zend license,     |
     | that is bundled with this package in the file LICENSE, and is        |
     | available through the world-wide-web at the following url:           |
     | http://www.zend.com/license/2_00.txt.                                |
     | If you did not receive a copy of the Zend license and are unable to  |
     | obtain it through the world-wide-web, please send a note to          |
     | license@zend.com so we can mail you a copy immediately.              |
     +----------------------------------------------------------------------+
     | Authors: Nikita Popov <nikic@php.net>                                |
     +----------------------------------------------------------------------+
  */
  
  /* $Id$ */
  
  #include "zend.h"
  #include "zend_API.h"
  #include "zend_interfaces.h"
  #include "zend_exceptions.h"
  #include "zend_generators.h"
  
  ZEND_API zend_class_entry *zend_ce_generator;
  static zend_object_handlers zend_generator_handlers;
  
  static zend_object *zend_generator_create(zend_class_entry *class_type TSRMLS_DC);
  
  static void zend_generator_cleanup_unfinished_execution(zend_generator *generator TSRMLS_DC) /* {{{ */
  {
  	zend_execute_data *execute_data = generator->execute_data;
  	zend_op_array *op_array = &execute_data->func->op_array;
  
  	if (generator->send_target) {
  		if (Z_REFCOUNTED_P(generator->send_target)) Z_DELREF_P(generator->send_target);
  		generator->send_target = NULL;
  	}
  
  	/* Manually free loop variables, as execution couldn't reach their
  	 * SWITCH_FREE / FREE opcodes. */
  	{
  		/* -1 required because we want the last run opcode, not the
  		 * next to-be-run one. */
  		uint32_t op_num = execute_data->opline - op_array->opcodes - 1;
  
  		int i;
  		for (i = 0; i < op_array->last_brk_cont; ++i) {
  			zend_brk_cont_element *brk_cont = op_array->brk_cont_array + i;
  
  			if (brk_cont->start < 0) {
  				continue;
  			} else if (brk_cont->start > op_num) {
  				break;
  			} else if (brk_cont->brk > op_num) {
  				zend_op *brk_opline = op_array->opcodes + brk_cont->brk;
  
  				switch (brk_opline->opcode) {
  					case ZEND_SWITCH_FREE:
  						{
  							zval *var = EX_VAR_2(execute_data, brk_opline->op1.var);
  							zval_ptr_dtor(var);
  						}
  						break;
  					case ZEND_FREE:
  						{
  							zval *var = EX_VAR_2(execute_data, brk_opline->op1.var);
  							zval_dtor(var);
  						}
  						break;
  				}
  			}
  		}
  	}
  
  	/* If yield was used as a function argument there may be active
  	 * method calls those objects need to be freed */
  	while (execute_data->call) {
  		if (execute_data->call->object) {
  			OBJ_RELEASE(execute_data->call->object);
  		}
  		execute_data->call = execute_data->call->prev_nested_call;
  	}
  }
  /* }}} */
  
  ZEND_API void zend_generator_close(zend_generator *generator, zend_bool finished_execution TSRMLS_DC) /* {{{ */
  {
  	if (Z_TYPE(generator->value) != IS_UNDEF) {
  		zval_ptr_dtor(&generator->value);
  		ZVAL_UNDEF(&generator->value);
  	}
  
  	if (Z_TYPE(generator->key) != IS_UNDEF) {
  		zval_ptr_dtor(&generator->key);
  		ZVAL_UNDEF(&generator->key);
  	}
  
  	if (generator->execute_data) {
  		zend_execute_data *execute_data = generator->execute_data;
  		zend_op_array *op_array = &execute_data->func->op_array;
  
  		if (!execute_data->symbol_table) {
  			zend_free_compiled_variables(execute_data TSRMLS_CC);
  		} else {
  			zend_clean_and_cache_symbol_table(execute_data->symbol_table TSRMLS_CC);
  		}
  
  		if (execute_data->object) {
  			OBJ_RELEASE(execute_data->object);
  		}
  
  		/* A fatal error / die occurred during the generator execution. Trying to clean
  		 * up the stack may not be safe in this case. */
  		if (CG(unclean_shutdown)) {
  			generator->execute_data = NULL;
  			return;
  		}
  
  		zend_vm_stack_free_extra_args(generator->execute_data TSRMLS_CC);
  
  		/* Some cleanups are only necessary if the generator was closued
  		 * before it could finish execution (reach a return statement). */
  		if (!finished_execution) {
  			zend_generator_cleanup_unfinished_execution(generator TSRMLS_CC);
  		}
  
  		/* Free a clone of closure */
  		if (op_array->fn_flags & ZEND_ACC_CLOSURE) {
  			destroy_op_array(op_array TSRMLS_CC);
  			efree_size(op_array, sizeof(zend_op_array));
  		}
  
  		efree(generator->stack);
  		generator->execute_data = NULL;
  	}
  }
  /* }}} */
  
  static void zend_generator_dtor_storage(zend_object *object TSRMLS_DC) /* {{{ */
  {
  	zend_generator *generator = (zend_generator*) object;
  	zend_execute_data *ex = generator->execute_data;
  	uint32_t op_num, finally_op_num;
  	int i;
  
  	if (!ex || !(ex->func->op_array.fn_flags & ZEND_ACC_HAS_FINALLY_BLOCK)) {
  		return;
  	}
  
  	/* -1 required because we want the last run opcode, not the
  	 * next to-be-run one. */
  	op_num = ex->opline - ex->func->op_array.opcodes - 1;
  
  	/* Find next finally block */
  	finally_op_num = 0;
  	for (i = 0; i < ex->func->op_array.last_try_catch; i++) {
  		zend_try_catch_element *try_catch = &ex->func->op_array.try_catch_array[i];
  
  		if (op_num < try_catch->try_op) {
  			break;
  		}
  
  		if (op_num < try_catch->finally_op) {
  			finally_op_num = try_catch->finally_op;
  		}
  	}
  
  	/* If a finally block was found we jump directly to it and
  	 * resume the generator. */
  	if (finally_op_num) {
  		ex->opline = &ex->func->op_array.opcodes[finally_op_num];
  		ex->fast_ret = NULL;
  		generator->flags |= ZEND_GENERATOR_FORCED_CLOSE;
  		zend_generator_resume(generator TSRMLS_CC);
  	}
  }
  /* }}} */
  
  static void zend_generator_free_storage(zend_object *object TSRMLS_DC) /* {{{ */
  {
  	zend_generator *generator = (zend_generator*) object;
  
  	zend_generator_close(generator, 0 TSRMLS_CC);
  
  	zend_object_std_dtor(&generator->std TSRMLS_CC);
  
  	if (generator->iterator) {
  		zend_iterator_dtor(generator->iterator TSRMLS_CC);
  	}
  }
  /* }}} */
  
  static zend_object *zend_generator_create(zend_class_entry *class_type TSRMLS_DC) /* {{{ */
  {
  	zend_generator *generator;
  
  	generator = emalloc(sizeof(zend_generator));
  	memset(generator, 0, sizeof(zend_generator));
  
  	/* The key will be incremented on first use, so it'll start at 0 */
  	generator->largest_used_integer_key = -1;
  
  	zend_object_std_init(&generator->std, class_type TSRMLS_CC);
  	generator->std.handlers = &zend_generator_handlers;
  
  	return (zend_object*)generator;
  }
  /* }}} */
  
  static int copy_closure_static_var(zval *var TSRMLS_DC, int num_args, va_list args, zend_hash_key *key) /* {{{ */
  {
  	HashTable *target = va_arg(args, HashTable *);
  
  	ZVAL_MAKE_REF(var);
  	Z_ADDREF_P(var);
  	zend_hash_update(target, key->key, var);
  	return 0;
  }
  /* }}} */
  
  /* Requires globals EG(scope), EG(This) and EG(current_execute_data). */
  ZEND_API void zend_generator_create_zval(zend_execute_data *call, zend_op_array *op_array, zval *return_value TSRMLS_DC) /* {{{ */
  {
  	zend_generator *generator;
  	zend_execute_data *current_execute_data;
  	zend_execute_data *execute_data;
  	zend_vm_stack current_stack = EG(argument_stack);
  
  	/* Create a clone of closure, because it may be destroyed */
  	if (op_array->fn_flags & ZEND_ACC_CLOSURE) {
  		zend_op_array *op_array_copy = (zend_op_array*)emalloc(sizeof(zend_op_array));
  		*op_array_copy = *op_array;
  
  		(*op_array->refcount)++;
  		op_array->run_time_cache = NULL;
  		if (op_array->static_variables) {
  			ALLOC_HASHTABLE(op_array_copy->static_variables);
  			zend_hash_init(
  				op_array_copy->static_variables, 
  				zend_hash_num_elements(op_array->static_variables),
  				NULL, ZVAL_PTR_DTOR, 0
  			);
  			zend_hash_apply_with_arguments(
  				op_array->static_variables TSRMLS_CC,
  				copy_closure_static_var, 1, 
  				op_array_copy->static_variables
  			);
  		}
  
  		op_array = op_array_copy;
  	}
  	
  	/* Create new execution context. We have to back up and restore
  	 * EG(current_execute_data) here. */
  	current_execute_data = EG(current_execute_data);
  	execute_data = zend_create_generator_execute_data(call, op_array, return_value TSRMLS_CC);
  	EG(current_execute_data) = current_execute_data;
  
  	object_init_ex(return_value, zend_ce_generator);
  
  	if (Z_OBJ(EG(This))) {
  		Z_ADDREF(EG(This));
  	}
  
  	/* Save execution context in generator object. */
  	generator = (zend_generator *) Z_OBJ_P(return_value);
  	execute_data->prev_execute_data = NULL;
  	generator->execute_data = execute_data;
  	generator->stack = EG(argument_stack);
  	EG(argument_stack) = current_stack;
  
  	/* EX(return_value) keeps pointer to zend_object (not a real zval) */
  	execute_data->return_value = (zval*)generator;
  }
  /* }}} */
  
  static zend_function *zend_generator_get_constructor(zend_object *object TSRMLS_DC) /* {{{ */
  {
  	zend_error(E_RECOVERABLE_ERROR, "The \"Generator\" class is reserved for internal use and cannot be manually instantiated");
  
  	return NULL;
  }
  /* }}} */
  
  ZEND_API void zend_generator_resume(zend_generator *generator TSRMLS_DC) /* {{{ */
  {
  	/* The generator is already closed, thus can't resume */
  	if (!generator->execute_data) {
  		return;
  	}
  
  	if (generator->flags & ZEND_GENERATOR_CURRENTLY_RUNNING) {
  		zend_error(E_ERROR, "Cannot resume an already running generator");
  	}
  
  	/* Drop the AT_FIRST_YIELD flag */
  	generator->flags &= ~ZEND_GENERATOR_AT_FIRST_YIELD;
  
  	{
  		/* Backup executor globals */
  		zend_execute_data *original_execute_data = EG(current_execute_data);
  		zend_object *original_This;
  		zend_class_entry *original_scope = EG(scope);
  		zend_vm_stack original_stack = EG(argument_stack);
  
  		original_This = Z_OBJ(EG(This));
  
  		/* Set executor globals */
  		EG(current_execute_data) = generator->execute_data;
  		Z_OBJ(EG(This)) = generator->execute_data->object;
  		EG(scope) = generator->execute_data->scope;
  		EG(argument_stack) = generator->stack;
  
  		/* We want the backtrace to look as if the generator function was
  		 * called from whatever method we are current running (e.g. next()).
  		 * So we have to link generator call frame with caller call frames */
  
  		generator->execute_data->prev_execute_data = original_execute_data;
  
  		/* Resume execution */
  		generator->flags |= ZEND_GENERATOR_CURRENTLY_RUNNING;
  		zend_execute_ex(generator->execute_data TSRMLS_CC);
  		generator->flags &= ~ZEND_GENERATOR_CURRENTLY_RUNNING;
  
  		/* Unlink generator call_frame from the caller */
  		if (generator->execute_data) {
  			generator->execute_data->prev_execute_data = NULL;
  		}
  
  		/* Restore executor globals */
  		EG(current_execute_data) = original_execute_data;
  		Z_OBJ(EG(This)) = original_This;
  		EG(scope) = original_scope;
  		EG(argument_stack) = original_stack;
  
  		/* If an exception was thrown in the generator we have to internally
  		 * rethrow it in the parent scope. */
  		if (UNEXPECTED(EG(exception) != NULL)) {
  			zend_throw_exception_internal(NULL TSRMLS_CC);
  		}
  	}
  }
  /* }}} */
  
  static void zend_generator_ensure_initialized(zend_generator *generator TSRMLS_DC) /* {{{ */
  {
  	if (generator->execute_data && Z_TYPE(generator->value) == IS_UNDEF) {
  		zend_generator_resume(generator TSRMLS_CC);
  		generator->flags |= ZEND_GENERATOR_AT_FIRST_YIELD;
  	}
  }
  /* }}} */
  
  static void zend_generator_rewind(zend_generator *generator TSRMLS_DC) /* {{{ */
  {
  	zend_generator_ensure_initialized(generator TSRMLS_CC);
  
  	if (!(generator->flags & ZEND_GENERATOR_AT_FIRST_YIELD)) {
  		zend_throw_exception(NULL, "Cannot rewind a generator that was already run", 0 TSRMLS_CC);
  	}
  }
  /* }}} */
  
  /* {{{ proto void Generator::rewind()
   * Rewind the generator */
  ZEND_METHOD(Generator, rewind)
  {
  	zend_generator *generator;
  
  	if (zend_parse_parameters_none() == FAILURE) {
  		return;
  	}
  
  	generator = (zend_generator *) Z_OBJ_P(getThis());
  
  	zend_generator_rewind(generator TSRMLS_CC);
  }
  /* }}} */
  
  /* {{{ proto bool Generator::valid()
   * Check whether the generator is valid */
  ZEND_METHOD(Generator, valid)
  {
  	zend_generator *generator;
  
  	if (zend_parse_parameters_none() == FAILURE) {
  		return;
  	}
  
  	generator = (zend_generator *) Z_OBJ_P(getThis());
  
  	zend_generator_ensure_initialized(generator TSRMLS_CC);
  
  	RETURN_BOOL(Z_TYPE(generator->value) != IS_UNDEF);
  }
  /* }}} */
  
  /* {{{ proto mixed Generator::current()
   * Get the current value */
  ZEND_METHOD(Generator, current)
  {
  	zend_generator *generator;
  
  	if (zend_parse_parameters_none() == FAILURE) {
  		return;
  	}
  
  	generator = (zend_generator *) Z_OBJ_P(getThis());
  
  	zend_generator_ensure_initialized(generator TSRMLS_CC);
  
  	if (Z_TYPE(generator->value) != IS_UNDEF) {
  		RETURN_ZVAL_FAST(&generator->value);
  	}
  }
  /* }}} */
  
  /* {{{ proto mixed Generator::key()
   * Get the current key */
  ZEND_METHOD(Generator, key)
  {
  	zend_generator *generator;
  
  	if (zend_parse_parameters_none() == FAILURE) {
  		return;
  	}
  
  	generator = (zend_generator *) Z_OBJ_P(getThis());
  
  	zend_generator_ensure_initialized(generator TSRMLS_CC);
  
  	if (Z_TYPE(generator->key) != IS_UNDEF) {
  		RETURN_ZVAL_FAST(&generator->key);
  	}
  }
  /* }}} */
  
  /* {{{ proto void Generator::next()
   * Advances the generator */
  ZEND_METHOD(Generator, next)
  {
  	zend_generator *generator;
  
  	if (zend_parse_parameters_none() == FAILURE) {
  		return;
  	}
  
  	generator = (zend_generator *) Z_OBJ_P(getThis());
  
  	zend_generator_ensure_initialized(generator TSRMLS_CC);
  
  	zend_generator_resume(generator TSRMLS_CC);
  }
  /* }}} */
  
  /* {{{ proto mixed Generator::send(mixed $value)
   * Sends a value to the generator */
  ZEND_METHOD(Generator, send)
  {
  	zval *value;
  	zend_generator *generator;
  
  	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &value) == FAILURE) {
  		return;
  	}
  
  	generator = (zend_generator *) Z_OBJ_P(getThis());
  
  	zend_generator_ensure_initialized(generator TSRMLS_CC); 
  
  	/* The generator is already closed, thus can't send anything */
  	if (!generator->execute_data) {
  		return;
  	}
  
  	/* Put sent value in the target VAR slot, if it is used */
  	if (generator->send_target) {
  		if (Z_REFCOUNTED_P(generator->send_target)) Z_DELREF_P(generator->send_target);
  		ZVAL_COPY(generator->send_target, value);
  	}
  
  	zend_generator_resume(generator TSRMLS_CC);
  
  	if (Z_TYPE(generator->value) != IS_UNDEF) {
  		RETURN_ZVAL_FAST(&generator->value);
  	}
  }
  /* }}} */
  
  /* {{{ proto mixed Generator::throw(Exception $exception)
   * Throws an exception into the generator */
  ZEND_METHOD(Generator, throw)
  {
  	zval *exception, exception_copy;
  	zend_generator *generator;
  
  	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &exception) == FAILURE) {
  		return;
  	}
  
  	ZVAL_DUP(&exception_copy, exception);
  
  	generator = (zend_generator *) Z_OBJ_P(getThis());
  
  	zend_generator_ensure_initialized(generator TSRMLS_CC); 
  
  	if (generator->execute_data) {
  		/* Throw the exception in the context of the generator */
  		zend_execute_data *current_execute_data = EG(current_execute_data);
  		EG(current_execute_data) = generator->execute_data;
  
  		zend_throw_exception_object(&exception_copy TSRMLS_CC);
  
  		EG(current_execute_data) = current_execute_data;
  
  		zend_generator_resume(generator TSRMLS_CC);
  
  		if (Z_TYPE(generator->value) != IS_UNDEF) {
  			RETURN_ZVAL_FAST(&generator->value);
  		}
  	} else {
  		/* If the generator is already closed throw the exception in the
  		 * current context */
  		zend_throw_exception_object(&exception_copy TSRMLS_CC);
  	}
  }
  /* }}} */
  
  /* {{{ proto void Generator::__wakeup()
   * Throws an Exception as generators can't be serialized */
  ZEND_METHOD(Generator, __wakeup)
  {
  	/* Just specifying the zend_class_unserialize_deny handler is not enough,
  	 * because it is only invoked for C unserialization. For O the error has
  	 * to be thrown in __wakeup. */
  
  	if (zend_parse_parameters_none() == FAILURE) {
  		return;
  	}
  
  	zend_throw_exception(NULL, "Unserialization of 'Generator' is not allowed", 0 TSRMLS_CC);
  }
  /* }}} */
  
  /* get_iterator implementation */
  
  static void zend_generator_iterator_dtor(zend_object_iterator *iterator TSRMLS_DC) /* {{{ */
  {
  	zend_generator *generator = (zend_generator*)Z_OBJ(iterator->data);
  	generator->iterator = NULL;
  	zval_ptr_dtor(&iterator->data);
  	zend_iterator_dtor(iterator TSRMLS_CC);
  }
  /* }}} */
  
  static int zend_generator_iterator_valid(zend_object_iterator *iterator TSRMLS_DC) /* {{{ */
  {
  	zend_generator *generator = (zend_generator*)Z_OBJ(iterator->data);
  
  	zend_generator_ensure_initialized(generator TSRMLS_CC);
  
  	return Z_TYPE(generator->value) != IS_UNDEF ? SUCCESS : FAILURE;
  }
  /* }}} */
  
  static zval *zend_generator_iterator_get_data(zend_object_iterator *iterator TSRMLS_DC) /* {{{ */
  {
  	zend_generator *generator = (zend_generator*)Z_OBJ(iterator->data);
  
  	zend_generator_ensure_initialized(generator TSRMLS_CC);
  
  	return &generator->value;
  }
  /* }}} */
  
  static void zend_generator_iterator_get_key(zend_object_iterator *iterator, zval *key TSRMLS_DC) /* {{{ */
  {
  	zend_generator *generator = (zend_generator*)Z_OBJ(iterator->data);
  
  	zend_generator_ensure_initialized(generator TSRMLS_CC);
  
  	if (Z_TYPE(generator->key) != IS_UNDEF) {
  		ZVAL_ZVAL(key, &generator->key, 1, 0);
  	} else {
  		ZVAL_NULL(key);
  	}
  }
  /* }}} */
  
  static void zend_generator_iterator_move_forward(zend_object_iterator *iterator TSRMLS_DC) /* {{{ */
  {
  	zend_generator *generator = (zend_generator*)Z_OBJ(iterator->data);
  
  	zend_generator_ensure_initialized(generator TSRMLS_CC);
  
  	zend_generator_resume(generator TSRMLS_CC);
  }
  /* }}} */
  
  static void zend_generator_iterator_rewind(zend_object_iterator *iterator TSRMLS_DC) /* {{{ */
  {
  	zend_generator *generator = (zend_generator*)Z_OBJ(iterator->data);
  
  	zend_generator_rewind(generator TSRMLS_CC);
  }
  /* }}} */
  
  static zend_object_iterator_funcs zend_generator_iterator_functions = {
  	zend_generator_iterator_dtor,
  	zend_generator_iterator_valid,
  	zend_generator_iterator_get_data,
  	zend_generator_iterator_get_key,
  	zend_generator_iterator_move_forward,
  	zend_generator_iterator_rewind
  };
  
  zend_object_iterator *zend_generator_get_iterator(zend_class_entry *ce, zval *object, int by_ref TSRMLS_DC) /* {{{ */
  {
  	zend_object_iterator *iterator;
  	zend_generator *generator = (zend_generator*)Z_OBJ_P(object);
  
  	if (!generator->execute_data) {
  		zend_throw_exception(NULL, "Cannot traverse an already closed generator", 0 TSRMLS_CC);
  		return NULL;
  	}
  
  	if (by_ref && !(generator->execute_data->func->op_array.fn_flags & ZEND_ACC_RETURN_REFERENCE)) {
  		zend_throw_exception(NULL, "You can only iterate a generator by-reference if it declared that it yields by-reference", 0 TSRMLS_CC);
  		return NULL;
  	}
  
  	iterator = generator->iterator = emalloc(sizeof(zend_object_iterator));
  	
  	zend_iterator_init(iterator TSRMLS_CC);
  
  	iterator->funcs = &zend_generator_iterator_functions;
  	ZVAL_COPY(&iterator->data, object);
  
  	return iterator;
  }
  /* }}} */
  
  ZEND_BEGIN_ARG_INFO(arginfo_generator_void, 0)
  ZEND_END_ARG_INFO()
  
  ZEND_BEGIN_ARG_INFO_EX(arginfo_generator_send, 0, 0, 1)
  	ZEND_ARG_INFO(0, value)
  ZEND_END_ARG_INFO()
  
  ZEND_BEGIN_ARG_INFO_EX(arginfo_generator_throw, 0, 0, 1)
  	ZEND_ARG_INFO(0, exception)
  ZEND_END_ARG_INFO()
  
  static const zend_function_entry generator_functions[] = {
  	ZEND_ME(Generator, rewind,   arginfo_generator_void, ZEND_ACC_PUBLIC)
  	ZEND_ME(Generator, valid,    arginfo_generator_void, ZEND_ACC_PUBLIC)
  	ZEND_ME(Generator, current,  arginfo_generator_void, ZEND_ACC_PUBLIC)
  	ZEND_ME(Generator, key,      arginfo_generator_void, ZEND_ACC_PUBLIC)
  	ZEND_ME(Generator, next,     arginfo_generator_void, ZEND_ACC_PUBLIC)
  	ZEND_ME(Generator, send,     arginfo_generator_send, ZEND_ACC_PUBLIC)
  	ZEND_ME(Generator, throw,    arginfo_generator_throw, ZEND_ACC_PUBLIC)
  	ZEND_ME(Generator, __wakeup, arginfo_generator_void, ZEND_ACC_PUBLIC)
  	ZEND_FE_END
  };
  
  void zend_register_generator_ce(TSRMLS_D) /* {{{ */
  {
  	zend_class_entry ce;
  
  	INIT_CLASS_ENTRY(ce, "Generator", generator_functions);
  	zend_ce_generator = zend_register_internal_class(&ce TSRMLS_CC);
  	zend_ce_generator->ce_flags |= ZEND_ACC_FINAL_CLASS;
  	zend_ce_generator->create_object = zend_generator_create;
  	zend_ce_generator->serialize = zend_class_serialize_deny;
  	zend_ce_generator->unserialize = zend_class_unserialize_deny;
  
  	/* get_iterator has to be assigned *after* implementing the inferface */
  	zend_class_implements(zend_ce_generator TSRMLS_CC, 1, zend_ce_iterator);
  	zend_ce_generator->get_iterator = zend_generator_get_iterator;
  	zend_ce_generator->iterator_funcs.funcs = &zend_generator_iterator_functions;
  
  	memcpy(&zend_generator_handlers, zend_get_std_object_handlers(), sizeof(zend_object_handlers));
  	zend_generator_handlers.free_obj = zend_generator_free_storage;
  	zend_generator_handlers.dtor_obj = zend_generator_dtor_storage;
  	zend_generator_handlers.clone_obj = NULL;
  	zend_generator_handlers.get_constructor = zend_generator_get_constructor;
  }
  /* }}} */
  
  /*
   * Local variables:
   * tab-width: 4
   * c-basic-offset: 4
   * indent-tabs-mode: t
   * End:
   */
  