/* Copyright JS Foundation and other contributors, http://js.foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "ecma-alloc.h"
#include "ecma-builtin-helpers.h"
#include "ecma-exceptions.h"
#include "ecma-function-object.h"
#include "ecma-gc.h"
#include "ecma-helpers.h"
#include "lit-char-helpers.h"
#include "ecma-lex-env.h"
#include "ecma-objects.h"
#include "ecma-objects-general.h"
#include "ecma-objects-arguments.h"
#include "ecma-proxy-object.h"
#include "ecma-try-catch-macro.h"
#include "jcontext.h"

/** \addtogroup ecma ECMA
 * @{
 *
 * \addtogroup ecmafunctionobject ECMA Function object related routines
 * @{
 */

#if ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ES2015_MODULE_SYSTEM)
/**
 * Get the resource name from the compiled code header
 *
 * @return resource name as ecma-string
 */
ecma_value_t
ecma_op_resource_name (const ecma_compiled_code_t *bytecode_header_p)
{
  JERRY_ASSERT (bytecode_header_p != NULL);

  uint8_t *byte_p = (uint8_t *) bytecode_header_p;
  byte_p += ((size_t) bytecode_header_p->size) << JMEM_ALIGNMENT_LOG;

  ecma_value_t *resource_name_p = (ecma_value_t *) byte_p;
  resource_name_p -= ecma_compiled_code_get_formal_params (bytecode_header_p);

#if ENABLED (JERRY_ES2015)
  if (bytecode_header_p->status_flags & CBC_CODE_FLAG_HAS_TAGGED_LITERALS)
  {
    resource_name_p--;
  }
#endif /* ENABLED (JERRY_ES2015) */

  return resource_name_p[-1];
} /* ecma_op_resource_name */
#endif /* ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ES2015_MODULE_SYSTEM) */

/**
 * IsCallable operation.
 *
 * See also: ECMA-262 v5, 9.11
 *
 * @return true - if the given object is callable;
 *         false - otherwise
 */
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_op_object_is_callable (ecma_object_t *obj_p) /**< ecma object */
{
  JERRY_ASSERT (!ecma_is_lexical_environment (obj_p));

  const ecma_object_type_t type = ecma_get_object_type (obj_p);

#if ENABLED (JERRY_ES2015_BUILTIN_PROXY)
  if (ECMA_OBJECT_TYPE_IS_PROXY (type))
  {
    return ecma_op_is_callable (((ecma_proxy_object_t *) obj_p)->target);
  }
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */

  return type >= ECMA_OBJECT_TYPE_FUNCTION;
} /* ecma_op_object_is_callable */

/**
 * IsCallable operation.
 *
 * See also: ECMA-262 v5, 9.11
 *
 * @return true - if value is callable object;
 *         false - otherwise
 */
bool
ecma_op_is_callable (ecma_value_t value) /**< ecma value */
{
  return (ecma_is_value_object (value)
          && ecma_op_object_is_callable (ecma_get_object_from_value (value)));
} /* ecma_op_is_callable */

/**
 * Checks whether the given object implements [[Construct]].
 *
 * @return true - if the given object is constructor;
 *         false - otherwise
 */
inline bool JERRY_ATTR_ALWAYS_INLINE
ecma_object_is_constructor (ecma_object_t *obj_p) /**< ecma object */
{
  JERRY_ASSERT (!ecma_is_lexical_environment (obj_p));

  ecma_object_type_t type = ecma_get_object_type (obj_p);

  while (type == ECMA_OBJECT_TYPE_BOUND_FUNCTION)
  {
    ecma_bound_function_t *bound_func_p = (ecma_bound_function_t *) obj_p;

    obj_p = ECMA_GET_NON_NULL_POINTER_FROM_POINTER_TAG (ecma_object_t,
                                                        bound_func_p->header.u.bound_function.target_function);

    type = ecma_get_object_type (obj_p);
  }

#if ENABLED (JERRY_ES2015_BUILTIN_PROXY)
  if (ECMA_OBJECT_TYPE_IS_PROXY (type))
  {
    return ecma_is_constructor (((ecma_proxy_object_t *) obj_p)->target);
  }
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */

  if (type == ECMA_OBJECT_TYPE_FUNCTION)
  {
    return (!ecma_get_object_is_builtin (obj_p) || !ecma_builtin_function_is_routine (obj_p));
  }

  return (type >= ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION);
} /* ecma_object_is_constructor */

/**
 * Checks whether the value is Object that implements [[Construct]].
 *
 * @return true - if value is constructor object;
 *         false - otherwise
 */
bool
ecma_is_constructor (ecma_value_t value) /**< ecma value */
{
  return (ecma_is_value_object (value)
          && ecma_object_is_constructor (ecma_get_object_from_value (value)));
} /* ecma_is_constructor */

/**
 * Helper method to count and convert the arguments for the Function/GeneratorFunction constructor call.
 *
 * See also:
 *          ECMA 262 v5.1 15.3.2.1 steps 5.a-d
 *          ECMA 262 v6 19.2.1.1.1 steps 8
 *
 * @return ecma value - concatenated arguments as a string.
 *         Returned value must be freed with ecma_free_value.
 */
static ecma_string_t *
ecma_op_create_dynamic_function_arguments_helper (const ecma_value_t *arguments_list_p, /**< arguments list */
                                                  ecma_length_t arguments_list_len) /**< number of arguments */
{
  JERRY_ASSERT (arguments_list_len == 0 || arguments_list_p != NULL);

  if (arguments_list_len <= 1)
  {
    return ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY);
  }

  ecma_string_t *str_p = ecma_op_to_string (arguments_list_p[0]);

  if (JERRY_UNLIKELY (str_p == NULL))
  {
    return str_p;
  }

  if (arguments_list_len == 2)
  {
    return str_p;
  }

  ecma_stringbuilder_t builder = ecma_stringbuilder_create_from (str_p);
  ecma_deref_ecma_string (str_p);

  for (ecma_length_t idx = 1; idx < arguments_list_len - 1; idx++)
  {
    str_p = ecma_op_to_string (arguments_list_p[idx]);

    if (JERRY_UNLIKELY (str_p == NULL))
    {
      ecma_stringbuilder_destroy (&builder);
      return str_p;
    }

    ecma_stringbuilder_append_char (&builder, LIT_CHAR_COMMA);
    ecma_stringbuilder_append (&builder, str_p);
    ecma_deref_ecma_string (str_p);
  }

  return ecma_stringbuilder_finalize (&builder);
} /* ecma_op_create_dynamic_function_arguments_helper */

/**
 * Function object creation operation.
 *
 * See also: ECMA-262 v5, 13.2
 *
 * @return pointer to newly created Function object
 */
static ecma_object_t *
ecma_op_create_function_object (ecma_object_t *scope_p, /**< function's scope */
                                const ecma_compiled_code_t *bytecode_data_p, /**< byte-code array */
                                ecma_builtin_id_t proto_id) /**< builtin id of the prototype object */
{
  JERRY_ASSERT (ecma_is_lexical_environment (scope_p));

  /* 1., 4., 13. */
  ecma_object_t *prototype_obj_p = ecma_builtin_get (proto_id);

  size_t function_object_size = sizeof (ecma_extended_object_t);

#if ENABLED (JERRY_SNAPSHOT_EXEC)
  if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STATIC_FUNCTION)
  {
    function_object_size = sizeof (ecma_static_function_t);
  }
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */

  ecma_object_t *func_p = ecma_create_object (prototype_obj_p,
                                              function_object_size,
                                              ECMA_OBJECT_TYPE_FUNCTION);

  /* 2., 6., 7., 8. */
  /*
   * We don't setup [[Get]], [[Call]], [[Construct]], [[HasInstance]] for each function object.
   * Instead we set the object's type to ECMA_OBJECT_TYPE_FUNCTION
   * that defines which version of the routine should be used on demand.
   */

  /* 3. */
  /*
   * [[Class]] property is not stored explicitly for objects of ECMA_OBJECT_TYPE_FUNCTION type.
   *
   * See also: ecma_object_get_class_name
   */

  ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) func_p;

  /* 9. */
  ECMA_SET_NON_NULL_POINTER_TAG (ext_func_p->u.function.scope_cp, scope_p, 0);

  /* 10., 11., 12. */

#if ENABLED (JERRY_SNAPSHOT_EXEC)
  if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STATIC_FUNCTION)
  {
    ext_func_p->u.function.bytecode_cp = ECMA_NULL_POINTER;
    ((ecma_static_function_t *) func_p)->bytecode_p = bytecode_data_p;
  }
  else
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
  {
    ECMA_SET_INTERNAL_VALUE_POINTER (ext_func_p->u.function.bytecode_cp, bytecode_data_p);
    ecma_bytecode_ref ((ecma_compiled_code_t *) bytecode_data_p);
  }

  /* 14., 15., 16., 17., 18. */
  /*
   * 'length' and 'prototype' properties are instantiated lazily
   *
   * See also: ecma_op_function_try_to_lazy_instantiate_property
   */

  return func_p;
} /* ecma_op_create_function_object */

/**
 * CreateDynamicFunction operation
 *
 * See also:
 *          ECMA-262 v5, 15.3.
 *          ECMA-262 v6, 19.2.1.1
 *
 * @return ECMA_VALUE_ERROR - if the operation fails
 *         constructed function object - otherwise
 */
ecma_value_t
ecma_op_create_dynamic_function (const ecma_value_t *arguments_list_p, /**< arguments list */
                                 ecma_length_t arguments_list_len, /**< number of arguments */
                                 ecma_parse_opts_t parse_opts) /**< parse options */
{
  JERRY_ASSERT (arguments_list_len == 0 || arguments_list_p != NULL);

  ecma_string_t *arguments_str_p = ecma_op_create_dynamic_function_arguments_helper (arguments_list_p,
                                                                                     arguments_list_len);

  if (JERRY_UNLIKELY (arguments_str_p == NULL))
  {
    return ECMA_VALUE_ERROR;
  }

  ecma_string_t *function_body_str_p;

  if (arguments_list_len > 0)
  {
    function_body_str_p = ecma_op_to_string (arguments_list_p[arguments_list_len - 1]);

    if (JERRY_UNLIKELY (function_body_str_p == NULL))
    {
      ecma_deref_ecma_string (arguments_str_p);
      return ECMA_VALUE_ERROR;
    }
  }
  else
  {
    /* Very unlikely code path, not optimized. */
    function_body_str_p = ecma_get_magic_string (LIT_MAGIC_STRING__EMPTY);
  }

  ECMA_STRING_TO_UTF8_STRING (arguments_str_p, arguments_buffer_p, arguments_buffer_size);
  ECMA_STRING_TO_UTF8_STRING (function_body_str_p, function_body_buffer_p, function_body_buffer_size);

#if ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ERROR_MESSAGES) || ENABLED (JERRY_ES2015_MODULE_SYSTEM)
  JERRY_CONTEXT (resource_name) = ecma_make_magic_string_value (LIT_MAGIC_STRING_RESOURCE_ANON);
#endif /* ENABLED (JERRY_LINE_INFO) || ENABLED (JERRY_ERROR_MESSAGES) || ENABLED (JERRY_ES2015_MODULE_SYSTEM) */

  ecma_compiled_code_t *bytecode_data_p = NULL;

  ecma_value_t ret_value = parser_parse_script (arguments_buffer_p,
                                                arguments_buffer_size,
                                                function_body_buffer_p,
                                                function_body_buffer_size,
                                                parse_opts,
                                                &bytecode_data_p);

  if (!ECMA_IS_VALUE_ERROR (ret_value))
  {
    JERRY_ASSERT (ecma_is_value_true (ret_value));

    ecma_object_t *global_env_p = ecma_get_global_environment ();
    ecma_builtin_id_t fallback_proto = ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE;

#if ENABLED (JERRY_ES2015)
    ecma_object_t *new_target_p = JERRY_CONTEXT (current_new_target);
    bool is_generator_func = parse_opts & ECMA_PARSE_GENERATOR_FUNCTION;

    if (is_generator_func)
    {
      fallback_proto = ECMA_BUILTIN_ID_GENERATOR;
    }

    if (new_target_p == NULL)
    {
      if (is_generator_func)
      {
        new_target_p = ecma_builtin_get (ECMA_BUILTIN_ID_GENERATOR_FUNCTION);
      }
      else
      {
        new_target_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION);
      }
    }

    ecma_object_t *proto = ecma_op_get_prototype_from_constructor (new_target_p, fallback_proto);

    if (JERRY_UNLIKELY (proto == NULL))
    {
      ecma_bytecode_deref (bytecode_data_p);
      ecma_deref_ecma_string (arguments_str_p);
      ecma_deref_ecma_string (function_body_str_p);
      return ECMA_VALUE_ERROR;
    }
#endif /* ENABLED (JERRY_ES2015) */

    ecma_object_t *func_obj_p = ecma_op_create_function_object (global_env_p, bytecode_data_p, fallback_proto);

#if ENABLED (JERRY_ES2015)
    ECMA_SET_NON_NULL_POINTER (func_obj_p->u2.prototype_cp, proto);
    ecma_deref_object (proto);
#endif /* ENABLED (JERRY_ES2015) */

    ecma_bytecode_deref (bytecode_data_p);
    ret_value = ecma_make_object_value (func_obj_p);
  }

  ECMA_FINALIZE_UTF8_STRING (function_body_buffer_p, function_body_buffer_size);
  ECMA_FINALIZE_UTF8_STRING (arguments_buffer_p, arguments_buffer_size);

  ecma_deref_ecma_string (arguments_str_p);
  ecma_deref_ecma_string (function_body_str_p);

  return ret_value;
} /* ecma_op_create_dynamic_function */

/**
 * Function object creation operation.
 *
 * See also: ECMA-262 v5, 13.2
 *
 * @return pointer to newly created Function object
 */
ecma_object_t *
ecma_op_create_simple_function_object (ecma_object_t *scope_p, /**< function's scope */
                                       const ecma_compiled_code_t *bytecode_data_p) /**< byte-code array */
{
  return ecma_op_create_function_object (scope_p, bytecode_data_p, ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE);
} /* ecma_op_create_simple_function_object */

#if ENABLED (JERRY_ES2015)

/**
 * GeneratorFunction object creation operation.
 *
 * See also: ECMA-262 v5, 13.2
 *
 * @return pointer to newly created Function object
 */
ecma_object_t *
ecma_op_create_generator_function_object (ecma_object_t *scope_p, /**< function's scope */
                                          const ecma_compiled_code_t *bytecode_data_p) /**< byte-code array */
{
  return ecma_op_create_function_object (scope_p, bytecode_data_p, ECMA_BUILTIN_ID_GENERATOR);
} /* ecma_op_create_generator_function_object */

/**
 * Arrow function object creation operation.
 *
 * See also: ES2015, 9.2.12
 *
 * @return pointer to newly created Function object
 */
ecma_object_t *
ecma_op_create_arrow_function_object (ecma_object_t *scope_p, /**< function's scope */
                                      const ecma_compiled_code_t *bytecode_data_p, /**< byte-code array */
                                      ecma_value_t this_binding) /**< value of 'this' binding */
{
  ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE);

  size_t arrow_function_object_size = sizeof (ecma_arrow_function_t);

#if ENABLED (JERRY_SNAPSHOT_EXEC)
  if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STATIC_FUNCTION)
  {
    arrow_function_object_size = sizeof (ecma_static_arrow_function_t);
  }
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */

  ecma_object_t *func_p = ecma_create_object (prototype_obj_p,
                                              arrow_function_object_size,
                                              ECMA_OBJECT_TYPE_FUNCTION);

  ecma_arrow_function_t *arrow_func_p = (ecma_arrow_function_t *) func_p;

  ECMA_SET_NON_NULL_POINTER_TAG (arrow_func_p->header.u.function.scope_cp, scope_p, 0);

#if ENABLED (JERRY_SNAPSHOT_EXEC)
  if ((bytecode_data_p->status_flags & CBC_CODE_FLAGS_STATIC_FUNCTION))
  {
    arrow_func_p->header.u.function.bytecode_cp = ECMA_NULL_POINTER;
    ((ecma_static_arrow_function_t *) func_p)->bytecode_p = bytecode_data_p;
  }
  else
  {
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
    ECMA_SET_INTERNAL_VALUE_POINTER (arrow_func_p->header.u.function.bytecode_cp, bytecode_data_p);
    ecma_bytecode_ref ((ecma_compiled_code_t *) bytecode_data_p);
#if ENABLED (JERRY_SNAPSHOT_EXEC)
  }
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */

  arrow_func_p->this_binding = ecma_copy_value_if_not_object (this_binding);
  arrow_func_p->new_target = ECMA_VALUE_UNDEFINED;

  if (JERRY_CONTEXT (current_new_target) != NULL)
  {
    arrow_func_p->new_target = ecma_make_object_value (JERRY_CONTEXT (current_new_target));
  }
  return func_p;
} /* ecma_op_create_arrow_function_object */

#endif /* ENABLED (JERRY_ES2015) */

/**
 * External function object creation operation.
 *
 * Note:
 *      external function object is implementation-defined object type
 *      that represent functions implemented in native code, using Embedding API
 *
 * @return pointer to newly created external function object
 */
ecma_object_t *
ecma_op_create_external_function_object (ecma_external_handler_t handler_cb) /**< pointer to external native handler */
{
  ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE);

  ecma_object_t *function_obj_p;
  function_obj_p = ecma_create_object (prototype_obj_p,
                                       sizeof (ecma_extended_object_t),
                                       ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION);

  /*
   * [[Class]] property is not stored explicitly for objects of ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION type.
   *
   * See also: ecma_object_get_class_name
   */

  ecma_extended_object_t *ext_func_obj_p = (ecma_extended_object_t *) function_obj_p;
  ext_func_obj_p->u.external_handler_cb = handler_cb;

  return function_obj_p;
} /* ecma_op_create_external_function_object */

/**
 * Get compiled code of a function object.
 *
 * @return compiled code
 */
inline const ecma_compiled_code_t * JERRY_ATTR_ALWAYS_INLINE
ecma_op_function_get_compiled_code (ecma_extended_object_t *function_p) /**< function pointer */
{
#if ENABLED (JERRY_SNAPSHOT_EXEC)
  if (function_p->u.function.bytecode_cp != ECMA_NULL_POINTER)
  {
    return ECMA_GET_INTERNAL_VALUE_POINTER (const ecma_compiled_code_t,
                                            function_p->u.function.bytecode_cp);
  }
  else
  {
    return ((ecma_static_function_t *) function_p)->bytecode_p;
  }
#else /* !ENABLED (JERRY_SNAPSHOT_EXEC) */
  return ECMA_GET_INTERNAL_VALUE_POINTER (const ecma_compiled_code_t,
                                          function_p->u.function.bytecode_cp);
#endif /* ENABLED (JERRY_SNAPSHOT_EXEC) */
} /* ecma_op_function_get_compiled_code */

#if ENABLED (JERRY_ES2015)
/**
 * Check whether the given object [[FunctionKind]] internal slot value is "generator".
 *
 * @return true - if the given object is a generator function
 *         false - otherwise
 */
bool
ecma_op_function_is_generator (ecma_object_t *obj_p) /**< object */
{
  if (ecma_get_object_type (obj_p) == ECMA_OBJECT_TYPE_FUNCTION
      && !ecma_get_object_is_builtin (obj_p))
  {
    ecma_extended_object_t *ext_func_obj_p = (ecma_extended_object_t *) obj_p;
    const ecma_compiled_code_t *bytecode_data_p = ecma_op_function_get_compiled_code (ext_func_obj_p);

    return (bytecode_data_p->status_flags & CBC_CODE_FLAGS_GENERATOR) != 0;
  }

  return false;
} /* ecma_op_function_is_generator */

#endif /* ENABLED (JERRY_ES2015) */

/**
 * 15.3.5.3 implementation of [[HasInstance]] for Function objects
 *
 * @return true/false - if arguments are valid
 *         error - otherwise
 *         Returned value must be freed with ecma_free_value
 */
ecma_value_t
ecma_op_function_has_instance (ecma_object_t *func_obj_p, /**< Function object */
                               ecma_value_t value) /**< argument 'V' */
{
  JERRY_ASSERT (func_obj_p != NULL
                && !ecma_is_lexical_environment (func_obj_p));

  if (!ecma_is_value_object (value))
  {
    return ECMA_VALUE_FALSE;
  }

  while (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION)
  {
    JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION);

    /* 1. 3. */
    ecma_bound_function_t *bound_func_p = (ecma_bound_function_t *) func_obj_p;

    func_obj_p = ECMA_GET_NON_NULL_POINTER_FROM_POINTER_TAG (ecma_object_t,
                                                             bound_func_p->header.u.bound_function.target_function);
  }

  JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_FUNCTION
                || ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION
                || ECMA_OBJECT_IS_PROXY (func_obj_p));

  ecma_object_t *v_obj_p = ecma_get_object_from_value (value);

  ecma_value_t prototype_obj_value = ecma_op_object_get_by_magic_id (func_obj_p,
                                                                     LIT_MAGIC_STRING_PROTOTYPE);

  if (ECMA_IS_VALUE_ERROR (prototype_obj_value))
  {
    return prototype_obj_value;
  }

  if (!ecma_is_value_object (prototype_obj_value))
  {
    ecma_free_value (prototype_obj_value);
    return ecma_raise_type_error (ECMA_ERR_MSG ("Object expected."));
  }

  ecma_object_t *prototype_obj_p = ecma_get_object_from_value (prototype_obj_value);
  JERRY_ASSERT (prototype_obj_p != NULL);

#if ENABLED (JERRY_ES2015_BUILTIN_PROXY)
  ecma_value_t result = ECMA_VALUE_ERROR;
#else /* !ENABLED (JERRY_ES2015_BUILTIN_PROXY) */
  ecma_value_t result = ECMA_VALUE_FALSE;
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */

  while (true)
  {
    jmem_cpointer_t v_obj_cp;
#if ENABLED (JERRY_ES2015_BUILTIN_PROXY)
    if (ECMA_OBJECT_IS_PROXY (v_obj_p))
    {
      ecma_value_t parent = ecma_proxy_object_get_prototype_of (v_obj_p);

      if (ECMA_IS_VALUE_ERROR (parent))
      {
        break;
      }

      v_obj_cp = ecma_proxy_object_prototype_to_cp (parent);
    }
    else
    {
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */
      v_obj_cp = ecma_op_ordinary_object_get_prototype_of (v_obj_p);
#if ENABLED (JERRY_ES2015_BUILTIN_PROXY)
    }
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */

    if (v_obj_cp == JMEM_CP_NULL)
    {
#if ENABLED (JERRY_ES2015_BUILTIN_PROXY)
      result = ECMA_VALUE_FALSE;
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */
      break;
    }

    v_obj_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, v_obj_cp);

    if (v_obj_p == prototype_obj_p)
    {
      result = ECMA_VALUE_TRUE;
      break;
    }
  }

  ecma_deref_object (prototype_obj_p);
  return result;
} /* ecma_op_function_has_instance */

#if ENABLED (JERRY_ES2015)

/**
 * GetSuperConstructor operation for class methods
 *
 * See also: ECMAScript v6, 12.3.5.2
 *
 * @return ECMA_VALUE_ERROR - if the operation fails
 *         super constructor - otherwise
 */
ecma_value_t
ecma_op_function_get_super_constructor (ecma_object_t *func_obj_p) /**< function object */
{
  ecma_object_t *super_ctor_p;

#if ENABLED (JERRY_ES2015_BUILTIN_PROXY)
  if (ECMA_OBJECT_IS_PROXY (func_obj_p))
  {
    ecma_value_t super_ctor = ecma_proxy_object_get_prototype_of (func_obj_p);

    if (ECMA_IS_VALUE_ERROR (super_ctor))
    {
      return super_ctor;
    }

    super_ctor_p = ecma_is_value_null (super_ctor) ? NULL : ecma_get_object_from_value (super_ctor);
  }
  else
  {
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */
    jmem_cpointer_t proto_cp = ecma_op_ordinary_object_get_prototype_of (func_obj_p);
    if (proto_cp == JMEM_CP_NULL)
    {
      super_ctor_p = NULL;
    }
    else
    {
      super_ctor_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, proto_cp);
      ecma_ref_object (super_ctor_p);
    }
#if ENABLED (JERRY_ES2015_BUILTIN_PROXY)
  }
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */

  if (super_ctor_p == NULL || !ecma_object_is_constructor (super_ctor_p))
  {
    if (super_ctor_p != NULL)
    {
      ecma_deref_object (super_ctor_p);
    }
    return ecma_raise_type_error (ECMA_ERR_MSG ("Super binding must be a constructor."));
  }

  return ecma_make_object_value (super_ctor_p);
} /* ecma_op_function_get_super_constructor */
#endif /* ENABLED (JERRY_ES2015) */

/**
 * Ordinary internal method: GetPrototypeFromConstructor (constructor, intrinsicDefaultProto)
 *
 * See also: ECMAScript v6, 9.1.15
 *
 * @return NULL - if the operation fail (exception on the global context is raised)
 *         pointer to the prototype object - otherwise
 */
ecma_object_t *
ecma_op_get_prototype_from_constructor (ecma_object_t *ctor_obj_p, /**< constructor to get prototype from  */
                                        ecma_builtin_id_t default_proto_id) /**< intrinsicDefaultProto */
{
  JERRY_ASSERT (ecma_object_is_constructor (ctor_obj_p));
  JERRY_ASSERT (default_proto_id < ECMA_BUILTIN_ID__COUNT);

  ecma_value_t proto = ecma_op_object_get_by_magic_id (ctor_obj_p, LIT_MAGIC_STRING_PROTOTYPE);

  if (ECMA_IS_VALUE_ERROR (proto))
  {
    return NULL;
  }

  ecma_object_t *proto_obj_p;

  if (!ecma_is_value_object (proto))
  {
    ecma_free_value (proto);
    proto_obj_p = ecma_builtin_get (default_proto_id);
    ecma_ref_object (proto_obj_p);
  }
  else
  {
    proto_obj_p = ecma_get_object_from_value (proto);
  }

  return proto_obj_p;
} /* ecma_op_get_prototype_from_constructor */

/**
 * Perform a JavaScript function object method call.
 *
 * The input function object should be a pure JavaScript method
 *
 * @return the result of the function call.
 */
static ecma_value_t
ecma_op_function_call_simple (ecma_object_t *func_obj_p, /**< Function object */
                              ecma_value_t this_arg_value, /**< 'this' argument's value */
                              const ecma_value_t *arguments_list_p, /**< arguments list */
                              ecma_length_t arguments_list_len) /**< length of arguments list */
{
  JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_FUNCTION);

  if (JERRY_UNLIKELY (ecma_get_object_is_builtin (func_obj_p)))
  {
    return ecma_builtin_dispatch_call (func_obj_p, this_arg_value, arguments_list_p, arguments_list_len);
  }

  /* Entering Function Code (ECMA-262 v5, 10.4.3) */
  ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) func_obj_p;

  ecma_object_t *scope_p = ECMA_GET_NON_NULL_POINTER_FROM_POINTER_TAG (ecma_object_t,
                                                                       ext_func_p->u.function.scope_cp);

  /* 8. */
  ecma_value_t this_binding = this_arg_value;
  bool free_this_binding = false;

  const ecma_compiled_code_t *bytecode_data_p = ecma_op_function_get_compiled_code (ext_func_p);
  uint16_t status_flags = bytecode_data_p->status_flags;

#if ENABLED (JERRY_ES2015)
  bool is_construct_call = JERRY_CONTEXT (current_new_target) != NULL;
  if (JERRY_UNLIKELY (status_flags & (CBC_CODE_FLAGS_CLASS_CONSTRUCTOR | CBC_CODE_FLAGS_GENERATOR)))
  {
    if (!is_construct_call && (status_flags & CBC_CODE_FLAGS_CLASS_CONSTRUCTOR))
    {
      return ecma_raise_type_error (ECMA_ERR_MSG ("Class constructor cannot be invoked without 'new'."));
    }

    if ((status_flags & CBC_CODE_FLAGS_GENERATOR) && is_construct_call)
    {
      return ecma_raise_type_error (ECMA_ERR_MSG ("Generator functions cannot be invoked with 'new'."));
    }
  }
#endif /* ENABLED (JERRY_ES2015) */

  /* 1. */
#if ENABLED (JERRY_ES2015)
  ecma_object_t *old_function_object_p = JERRY_CONTEXT (current_function_obj_p);

  if (JERRY_UNLIKELY (status_flags & CBC_CODE_FLAGS_ARROW_FUNCTION))
  {
    ecma_arrow_function_t *arrow_func_p = (ecma_arrow_function_t *) func_obj_p;

    if (ecma_is_value_undefined (arrow_func_p->new_target))
    {
      JERRY_CONTEXT (current_new_target) = NULL;
    }
    else
    {
      JERRY_CONTEXT (current_new_target) = ecma_get_object_from_value (arrow_func_p->new_target);
    }
    this_binding = arrow_func_p->this_binding;
  }
  else
  {
    JERRY_CONTEXT (current_function_obj_p) = func_obj_p;
#endif /* ENABLED (JERRY_ES2015) */
    if (!(status_flags & CBC_CODE_FLAGS_STRICT_MODE))
    {
      if (ecma_is_value_undefined (this_binding)
          || ecma_is_value_null (this_binding))
      {
        /* 2. */
        this_binding = ecma_make_object_value (ecma_builtin_get_global ());
      }
      else if (!ecma_is_value_object (this_binding))
      {
        /* 3., 4. */
        this_binding = ecma_op_to_object (this_binding);
        free_this_binding = true;

        JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (this_binding));
      }
    }
#if ENABLED (JERRY_ES2015)
  }
#endif /* ENABLED (JERRY_ES2015) */

  /* 5. */
  ecma_object_t *local_env_p;
  if (status_flags & CBC_CODE_FLAGS_LEXICAL_ENV_NOT_NEEDED)
  {
    local_env_p = scope_p;
  }
  else
  {
    local_env_p = ecma_create_decl_lex_env (scope_p);
    if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_IS_ARGUMENTS_NEEDED)
    {
      ecma_op_create_arguments_object (func_obj_p,
                                       local_env_p,
                                       arguments_list_p,
                                       arguments_list_len,
                                       bytecode_data_p);
    }
#if ENABLED (JERRY_ES2015)
    // ECMAScript v6, 9.2.2.8
    if (JERRY_UNLIKELY (status_flags & CBC_CODE_FLAGS_CLASS_CONSTRUCTOR))
    {
      ecma_value_t lexical_this;
      lexical_this = (ECMA_GET_THIRD_BIT_FROM_POINTER_TAG (ext_func_p->u.function.scope_cp) ? ECMA_VALUE_UNINITIALIZED
                                                                                            : this_binding);
      ecma_op_init_this_binding (local_env_p, lexical_this);
    }
#endif /* ENABLED (JERRY_ES2015) */
  }

  ecma_value_t ret_value = vm_run (bytecode_data_p,
                                   this_binding,
                                   local_env_p,
                                   arguments_list_p,
                                   arguments_list_len);

#if ENABLED (JERRY_ES2015)
  JERRY_CONTEXT (current_function_obj_p) = old_function_object_p;

  /* ECMAScript v6, 9.2.2.13 */
  if (ECMA_GET_THIRD_BIT_FROM_POINTER_TAG (ext_func_p->u.function.scope_cp))
  {
    if (!ECMA_IS_VALUE_ERROR (ret_value) && !ecma_is_value_object (ret_value))
    {
      if (!ecma_is_value_undefined (ret_value))
      {
        ecma_free_value (ret_value);
        ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Derived constructors may only return object or undefined."));
      }
      else
      {
        ret_value = ecma_op_get_this_binding (local_env_p);
      }
    }
  }

#endif /* ENABLED (JERRY_ES2015) */

  if (!(status_flags & CBC_CODE_FLAGS_LEXICAL_ENV_NOT_NEEDED))
  {
    ecma_deref_object (local_env_p);
  }

  if (JERRY_UNLIKELY (free_this_binding))
  {
    ecma_free_value (this_binding);
  }

  return ret_value;
} /* ecma_op_function_call_simple */

/**
 * Perform a native C method call which was registered via the API.
 *
 * @return the result of the function call.
 */
static ecma_value_t JERRY_ATTR_NOINLINE
ecma_op_function_call_external (ecma_object_t *func_obj_p, /**< Function object */
                                ecma_value_t this_arg_value, /**< 'this' argument's value */
                                const ecma_value_t *arguments_list_p, /**< arguments list */
                                ecma_length_t arguments_list_len) /**< length of arguments list */

{
  JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION);
  ecma_extended_object_t *ext_func_obj_p = (ecma_extended_object_t *) func_obj_p;
  JERRY_ASSERT (ext_func_obj_p->u.external_handler_cb != NULL);

  ecma_value_t ret_value = ext_func_obj_p->u.external_handler_cb (ecma_make_object_value (func_obj_p),
                                                                  this_arg_value,
                                                                  arguments_list_p,
                                                                  arguments_list_len);
  if (JERRY_UNLIKELY (ecma_is_value_error_reference (ret_value)))
  {
    ecma_raise_error_from_error_reference (ret_value);
    return ECMA_VALUE_ERROR;
  }

#if ENABLED (JERRY_DEBUGGER)
  JERRY_DEBUGGER_CLEAR_FLAGS (JERRY_DEBUGGER_VM_EXCEPTION_THROWN);
#endif /* ENABLED (JERRY_DEBUGGER) */
  return ret_value;
} /* ecma_op_function_call_external */

/**
 * Append the bound arguments into the given collection
 *
 * Note:
 *       - The whole bound chain is resolved
 *       - The first element of the collection contains the bounded this value
 *
 * @return target function of the bound function
 */
JERRY_ATTR_NOINLINE static ecma_object_t *
ecma_op_bound_function_get_argument_list (ecma_object_t *func_obj_p, /**< bound bunction object */
                                          ecma_collection_t *list_p) /**< list of arguments */
{
  JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION);

  ecma_bound_function_t *bound_func_p = (ecma_bound_function_t *) func_obj_p;

  func_obj_p = ECMA_GET_NON_NULL_POINTER_FROM_POINTER_TAG (ecma_object_t,
                                                           bound_func_p->header.u.bound_function.target_function);

  ecma_value_t args_len_or_this = bound_func_p->header.u.bound_function.args_len_or_this;

  ecma_length_t args_length = 1;

  if (ecma_is_value_integer_number (args_len_or_this))
  {
    args_length = (ecma_length_t) ecma_get_integer_from_value (args_len_or_this);
  }

  /* 5. */
  if (args_length != 1)
  {
    const ecma_value_t *args_p = (const ecma_value_t *) (bound_func_p + 1);
    list_p->buffer_p[0] = *args_p;

    if (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION)
    {
      func_obj_p = ecma_op_bound_function_get_argument_list (func_obj_p, list_p);
    }
    ecma_collection_append (list_p, args_p + 1, args_length - 1);
  }
  else
  {
    list_p->buffer_p[0] = args_len_or_this;
  }

  return func_obj_p;
} /* ecma_op_bound_function_get_argument_list */

/**
 * [[Call]] internal method for bound function objects
 *
 * @return ecma value
 *         Returned value must be freed with ecma_free_value
 */
static ecma_value_t JERRY_ATTR_NOINLINE
ecma_op_function_call_bound (ecma_object_t *func_obj_p, /**< Function object */
                             const ecma_value_t *arguments_list_p, /**< arguments list */
                             ecma_length_t arguments_list_len) /**< length of arguments list */
{
  JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION);

  JERRY_CONTEXT (status_flags) &= (uint32_t) ~ECMA_STATUS_DIRECT_EVAL;

  ecma_collection_t *bound_arg_list_p = ecma_new_collection ();
  ecma_collection_push_back (bound_arg_list_p, ECMA_VALUE_EMPTY);

  ecma_object_t *target_obj_p = ecma_op_bound_function_get_argument_list (func_obj_p, bound_arg_list_p);

  ecma_collection_append (bound_arg_list_p, arguments_list_p, arguments_list_len);

  JERRY_ASSERT (!ecma_is_value_empty (bound_arg_list_p->buffer_p[0]));

  ecma_value_t ret_value = ecma_op_function_call (target_obj_p,
                                                  bound_arg_list_p->buffer_p[0],
                                                  bound_arg_list_p->buffer_p + 1,
                                                  (ecma_length_t) (bound_arg_list_p->item_count - 1));

  ecma_collection_destroy (bound_arg_list_p);

  return ret_value;
} /* ecma_op_function_call_bound */

/**
 * [[Call]] implementation for Function objects,
 * created through 13.2 (ECMA_OBJECT_TYPE_FUNCTION)
 * or 15.3.4.5 (ECMA_OBJECT_TYPE_BOUND_FUNCTION),
 * and for built-in Function objects
 * from section 15 (ECMA_OBJECT_TYPE_FUNCTION).
 *
 * @return ecma value
 *         Returned value must be freed with ecma_free_value
 */
ecma_value_t
ecma_op_function_call (ecma_object_t *func_obj_p, /**< Function object */
                       ecma_value_t this_arg_value, /**< 'this' argument's value */
                       const ecma_value_t *arguments_list_p, /**< arguments list */
                       ecma_length_t arguments_list_len) /**< length of arguments list */
{
  JERRY_ASSERT (func_obj_p != NULL
                && !ecma_is_lexical_environment (func_obj_p));
  JERRY_ASSERT (ecma_op_object_is_callable (func_obj_p));

  ECMA_CHECK_STACK_USAGE ();

  const ecma_object_type_t type = ecma_get_object_type (func_obj_p);

#if ENABLED (JERRY_ES2015_BUILTIN_PROXY)
  if (ECMA_OBJECT_TYPE_IS_PROXY (type))
  {
    return ecma_proxy_object_call (func_obj_p, this_arg_value, arguments_list_p, arguments_list_len);
  }
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */

#if ENABLED (JERRY_ES2015)
  ecma_object_t *old_new_target_p = JERRY_CONTEXT (current_new_target);
  if (JERRY_UNLIKELY (!(JERRY_CONTEXT (status_flags) & ECMA_STATUS_DIRECT_EVAL)))
  {
    JERRY_CONTEXT (current_new_target) = NULL;
  }
#endif /* ENABLED (JERRY_ES2015) */

  ecma_value_t result;

  if (JERRY_LIKELY (type == ECMA_OBJECT_TYPE_FUNCTION))
  {
    result = ecma_op_function_call_simple (func_obj_p, this_arg_value, arguments_list_p, arguments_list_len);
  }
  else if (type == ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION)
  {
    result = ecma_op_function_call_external (func_obj_p, this_arg_value, arguments_list_p, arguments_list_len);
  }
  else
  {
    result = ecma_op_function_call_bound (func_obj_p, arguments_list_p, arguments_list_len);
  }

#if ENABLED (JERRY_ES2015)
  JERRY_CONTEXT (current_new_target) = old_new_target_p;
#endif /* ENABLED (JERRY_ES2015) */

  return result;
} /* ecma_op_function_call */

/**
 * [[Construct]] internal method for bound function objects
 *
 * @return ecma value
 *         Returned value must be freed with ecma_free_value
 */
static ecma_value_t JERRY_ATTR_NOINLINE
ecma_op_function_construct_bound (ecma_object_t *func_obj_p, /**< Function object */
                                  ecma_object_t *new_target_p, /**< new target */
                                  const ecma_value_t *arguments_list_p, /**< arguments list */
                                  ecma_length_t arguments_list_len) /**< length of arguments list */
{
  JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION);

  ecma_collection_t *bound_arg_list_p = ecma_new_collection ();
  ecma_collection_push_back (bound_arg_list_p, ECMA_VALUE_EMPTY);

  ecma_object_t *target_obj_p = ecma_op_bound_function_get_argument_list (func_obj_p, bound_arg_list_p);

  ecma_collection_append (bound_arg_list_p, arguments_list_p, arguments_list_len);

  if (func_obj_p == new_target_p)
  {
    new_target_p = target_obj_p;
  }

  ecma_value_t ret_value = ecma_op_function_construct (target_obj_p,
                                                       new_target_p,
                                                       bound_arg_list_p->buffer_p + 1,
                                                       (ecma_length_t) (bound_arg_list_p->item_count - 1));

  ecma_collection_destroy (bound_arg_list_p);

  return ret_value;
} /* ecma_op_function_construct_bound */

/**
 * [[Construct]] internal method for external function objects
 *
 * @return ecma value
 *         Returned value must be freed with ecma_free_value
 */
static ecma_value_t JERRY_ATTR_NOINLINE
ecma_op_function_construct_external (ecma_object_t *func_obj_p, /**< Function object */
                                     ecma_object_t *new_target_p, /**< new target */
                                     const ecma_value_t *arguments_list_p, /**< arguments list */
                                     ecma_length_t arguments_list_len) /**< length of arguments list */
{
  JERRY_ASSERT (ecma_get_object_type (func_obj_p) == ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION);

  ecma_object_t *proto_p = ecma_op_get_prototype_from_constructor (new_target_p, ECMA_BUILTIN_ID_OBJECT_PROTOTYPE);

  if (JERRY_UNLIKELY (proto_p == NULL))
  {
    return ECMA_VALUE_ERROR;
  }

  ecma_object_t *new_this_obj_p = ecma_create_object (proto_p, 0, ECMA_OBJECT_TYPE_GENERAL);
  ecma_value_t this_arg = ecma_make_object_value (new_this_obj_p);
  ecma_deref_object (proto_p);

#if ENABLED (JERRY_ES2015)
  ecma_object_t *old_new_target_p = JERRY_CONTEXT (current_new_target);
  JERRY_CONTEXT (current_new_target) = new_target_p;
#endif /* ENABLED (JERRY_ES2015) */

  ecma_value_t ret_value = ecma_op_function_call_external (func_obj_p, this_arg, arguments_list_p, arguments_list_len);

#if ENABLED (JERRY_ES2015)
  JERRY_CONTEXT (current_new_target) = old_new_target_p;
#endif /* ENABLED (JERRY_ES2015) */

  if (ECMA_IS_VALUE_ERROR (ret_value) || ecma_is_value_object (ret_value))
  {
    ecma_deref_object (new_this_obj_p);
    return ret_value;
  }

  ecma_free_value (ret_value);

  return this_arg;
} /* ecma_op_function_construct_external */

/**
 * General [[Construct]] implementation function objects
 *
 * See also: ECMAScript v6, 9.2.2
 *
 * @return ecma value
 *         Returned value must be freed with ecma_free_value
 */
ecma_value_t
ecma_op_function_construct (ecma_object_t *func_obj_p, /**< Function object */
                            ecma_object_t *new_target_p, /**< new target */
                            const ecma_value_t *arguments_list_p, /**< arguments list */
                            ecma_length_t arguments_list_len) /**< length of arguments list */
{
  JERRY_ASSERT (func_obj_p != NULL
                && !ecma_is_lexical_environment (func_obj_p));

  const ecma_object_type_t type = ecma_get_object_type (func_obj_p);

#if ENABLED (JERRY_ES2015_BUILTIN_PROXY)
  if (ECMA_OBJECT_TYPE_IS_PROXY (type))
  {
    return ecma_proxy_object_construct (func_obj_p,
                                        new_target_p,
                                        arguments_list_p,
                                        arguments_list_len);
  }
#endif /* ENABLED (JERRY_ES2015_BUILTIN_PROXY) */

  if (JERRY_UNLIKELY (type == ECMA_OBJECT_TYPE_BOUND_FUNCTION))
  {
    return ecma_op_function_construct_bound (func_obj_p, new_target_p, arguments_list_p, arguments_list_len);
  }

  if (JERRY_UNLIKELY (type == ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION))
  {
    return ecma_op_function_construct_external (func_obj_p, new_target_p, arguments_list_p, arguments_list_len);
  }

  JERRY_ASSERT (type == ECMA_OBJECT_TYPE_FUNCTION);

  if (JERRY_UNLIKELY (ecma_get_object_is_builtin (func_obj_p)))
  {
    return ecma_builtin_dispatch_construct (func_obj_p, new_target_p, arguments_list_p, arguments_list_len);
  }

  ecma_object_t *new_this_obj_p = NULL;
  ecma_value_t this_arg;
  ecma_extended_object_t *ext_func_obj_p = (ecma_extended_object_t *) func_obj_p;
  const ecma_compiled_code_t *byte_code_p = ecma_op_function_get_compiled_code (ext_func_obj_p);

  if (byte_code_p->status_flags & (CBC_CODE_FLAGS_ARROW_FUNCTION | CBC_CODE_FLAGS_ACCESSOR))
  {
    if (byte_code_p->status_flags & CBC_CODE_FLAGS_ARROW_FUNCTION)
    {
      return ecma_raise_type_error (ECMA_ERR_MSG ("Arrow functions have no constructor."));
    }

    return ecma_raise_type_error (ECMA_ERR_MSG ("Expected a constructor."));
  }

#if ENABLED (JERRY_ES2015)
  /* 6. */
  ecma_object_t *old_new_target_p = JERRY_CONTEXT (current_new_target);
  JERRY_CONTEXT (current_new_target) = new_target_p;

  /* 5. */
  if (!ECMA_GET_THIRD_BIT_FROM_POINTER_TAG (ext_func_obj_p->u.function.scope_cp))
  {
#endif /* ENABLED (JERRY_ES2015) */
    /* 5.a */
    ecma_object_t *proto_p = ecma_op_get_prototype_from_constructor (new_target_p, ECMA_BUILTIN_ID_OBJECT_PROTOTYPE);

    /* 5.b */
    if (JERRY_UNLIKELY (proto_p == NULL))
    {
      return ECMA_VALUE_ERROR;
    }

    new_this_obj_p = ecma_create_object (proto_p, 0, ECMA_OBJECT_TYPE_GENERAL);
    ecma_deref_object (proto_p);
    this_arg = ecma_make_object_value (new_this_obj_p);
#if ENABLED (JERRY_ES2015)
  }
  else
  {
    this_arg = ECMA_VALUE_UNDEFINED;
  }
#endif /* ENABLED (JERRY_ES2015) */

  ecma_value_t ret_value = ecma_op_function_call_simple (func_obj_p, this_arg, arguments_list_p, arguments_list_len);

#if ENABLED (JERRY_ES2015)
  JERRY_CONTEXT (current_new_target) = old_new_target_p;
#endif /* ENABLED (JERRY_ES2015) */

  /* 13.a */
  if (ECMA_IS_VALUE_ERROR (ret_value) || ecma_is_value_object (ret_value))
  {
#if ENABLED (JERRY_ES2015)
    if (new_this_obj_p != NULL)
    {
      ecma_deref_object (new_this_obj_p);
    }
#else /* !ENABLED (JERRY_ES2015) */
    ecma_deref_object (new_this_obj_p);
#endif /* ENABLED (JERRY_ES2015) */
    return ret_value;
  }

  /* 13.b */
  ecma_free_value (ret_value);
  return this_arg;
} /* ecma_op_function_construct */

/**
 * Lazy instantiation of 'prototype' property for non-builtin and external functions
 *
 * @return pointer to newly instantiated property
 */
static ecma_property_t *
ecma_op_lazy_instantiate_prototype_object (ecma_object_t *object_p) /**< the function object */
{
  JERRY_ASSERT (ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_FUNCTION
                || ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION);

  /* ECMA-262 v5, 13.2, 16-18 */

  ecma_object_t *proto_object_p = NULL;
  bool init_constructor = true;

#if ENABLED (JERRY_ES2015)
  if (ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_FUNCTION)
  {
    const ecma_compiled_code_t *byte_code_p = ecma_op_function_get_compiled_code ((ecma_extended_object_t *) object_p);

    if (byte_code_p->status_flags & CBC_CODE_FLAGS_GENERATOR)
    {
      proto_object_p = ecma_create_object (ecma_builtin_get (ECMA_BUILTIN_ID_GENERATOR_PROTOTYPE),
                                           0,
                                           ECMA_OBJECT_TYPE_GENERAL);
      init_constructor = false;
    }
    else if (byte_code_p->status_flags & (CBC_CODE_FLAGS_ARROW_FUNCTION | CBC_CODE_FLAGS_ACCESSOR))
    {
      return NULL;
    }
  }
#endif /* ENABLED (JERRY_ES2015) */

#if ENABLED (JERRY_ES2015)
  if (proto_object_p == NULL)
#endif /* ENABLED (JERRY_ES2015) */
  {
    proto_object_p = ecma_op_create_object_object_noarg ();
  }

  /* 17. */
  if (init_constructor)
  {
    ecma_property_value_t *constructor_prop_value_p;
    constructor_prop_value_p = ecma_create_named_data_property (proto_object_p,
                                                                ecma_get_magic_string (LIT_MAGIC_STRING_CONSTRUCTOR),
                                                                ECMA_PROPERTY_CONFIGURABLE_WRITABLE,
                                                                NULL);

    constructor_prop_value_p->value = ecma_make_object_value (object_p);
  }

  /* 18. */
  ecma_property_t *prototype_prop_p;
  ecma_property_value_t *prototype_prop_value_p;
  prototype_prop_value_p = ecma_create_named_data_property (object_p,
                                                            ecma_get_magic_string (LIT_MAGIC_STRING_PROTOTYPE),
                                                            ECMA_PROPERTY_FLAG_WRITABLE,
                                                            &prototype_prop_p);

  prototype_prop_value_p->value = ecma_make_object_value (proto_object_p);

  ecma_deref_object (proto_object_p);

  return prototype_prop_p;
} /* ecma_op_lazy_instantiate_prototype_object */

/**
 * Lazy instantiation of non-builtin ecma function object's properties
 *
 * Warning:
 *         Only non-configurable properties could be instantiated lazily in this function,
 *         as configurable properties could be deleted and it would be incorrect
 *         to reinstantiate them in the function in second time.
 *
 * @return pointer to newly instantiated property, if a property was instantiated,
 *         NULL - otherwise
 */
ecma_property_t *
ecma_op_function_try_to_lazy_instantiate_property (ecma_object_t *object_p, /**< the function object */
                                                   ecma_string_t *property_name_p) /**< property name */
{
  JERRY_ASSERT (!ecma_get_object_is_builtin (object_p));

#if ENABLED (JERRY_ES2015)
  if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_LENGTH))
  {
    ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) object_p;
    if (!ECMA_GET_FIRST_BIT_FROM_POINTER_TAG (ext_func_p->u.function.scope_cp))
    {
      /* Initialize 'length' property */
      const ecma_compiled_code_t *bytecode_data_p = ecma_op_function_get_compiled_code (ext_func_p);
      uint32_t len;
      if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_UINT16_ARGUMENTS)
      {
        cbc_uint16_arguments_t *args_p = (cbc_uint16_arguments_t *) bytecode_data_p;
        len = args_p->argument_end;
      }
      else
      {
        cbc_uint8_arguments_t *args_p = (cbc_uint8_arguments_t *) bytecode_data_p;
        len = args_p->argument_end;
      }

      /* Set tag bit to represent initialized 'length' property */
      ECMA_SET_FIRST_BIT_TO_POINTER_TAG (ext_func_p->u.function.scope_cp);
      ecma_property_t *value_prop_p;
      ecma_property_value_t *value_p = ecma_create_named_data_property (object_p,
                                                                        property_name_p,
                                                                        ECMA_PROPERTY_FLAG_CONFIGURABLE,
                                                                        &value_prop_p);
      value_p->value = ecma_make_uint32_value (len);
      return value_prop_p;
    }

    return NULL;
  }
#endif /* ENABLED (JERRY_ES2015) */

  if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_PROTOTYPE)
      && ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_FUNCTION)
  {
    return ecma_op_lazy_instantiate_prototype_object (object_p);
  }

  if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_CALLER)
      || ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_ARGUMENTS))
  {
    const ecma_compiled_code_t *bytecode_data_p;
    bytecode_data_p = ecma_op_function_get_compiled_code ((ecma_extended_object_t *) object_p);

#if ENABLED (JERRY_ES2015)
    if (!(bytecode_data_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE))
    {
      ecma_property_t *value_prop_p;
      /* The property_name_p argument contans the name. */
      ecma_property_value_t *value_p = ecma_create_named_data_property (object_p,
                                                                        property_name_p,
                                                                        ECMA_PROPERTY_FIXED,
                                                                        &value_prop_p);
      value_p->value = ECMA_VALUE_NULL;
      return value_prop_p;
    }
#else /* !ENABLED (JERRY_ES2015) */
    if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE)
    {
      ecma_object_t *thrower_p = ecma_builtin_get (ECMA_BUILTIN_ID_TYPE_ERROR_THROWER);

      ecma_property_t *caller_prop_p;
      /* The property_name_p argument contans the name. */
      ecma_create_named_accessor_property (object_p,
                                           property_name_p,
                                           thrower_p,
                                           thrower_p,
                                           ECMA_PROPERTY_FIXED,
                                           &caller_prop_p);
      return caller_prop_p;
    }
#endif /* ENABLED (JERRY_ES2015) */

  }

  return NULL;
} /* ecma_op_function_try_to_lazy_instantiate_property */

/**
 * Create specification defined non-configurable properties for external functions.
 *
 * See also:
 *          ECMA-262 v5, 15.3.4.5
 *
 * @return pointer property, if one was instantiated,
 *         NULL - otherwise.
 */
ecma_property_t *
ecma_op_external_function_try_to_lazy_instantiate_property (ecma_object_t *object_p, /**< object */
                                                            ecma_string_t *property_name_p) /**< property's name */
{
  JERRY_ASSERT (ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_EXTERNAL_FUNCTION);

  if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_PROTOTYPE))
  {
    return ecma_op_lazy_instantiate_prototype_object (object_p);
  }

  return NULL;
} /* ecma_op_external_function_try_to_lazy_instantiate_property */

/**
 * Create specification defined non-configurable properties for bound functions.
 *
 * See also:
 *          ECMA-262 v5, 15.3.4.5
 *
 * @return pointer property, if one was instantiated,
 *         NULL - otherwise.
 */
ecma_property_t *
ecma_op_bound_function_try_to_lazy_instantiate_property (ecma_object_t *object_p, /**< object */
                                                         ecma_string_t *property_name_p) /**< property's name */
{
  JERRY_ASSERT (ecma_get_object_type (object_p) == ECMA_OBJECT_TYPE_BOUND_FUNCTION);

  if (ecma_string_is_length (property_name_p))
  {
    ecma_bound_function_t *bound_func_p = (ecma_bound_function_t *) object_p;
    ecma_value_t args_len_or_this = bound_func_p->header.u.bound_function.args_len_or_this;
    ecma_integer_value_t length = 0;
    ecma_integer_value_t args_length = 1;
    uint8_t length_attributes;

    if (ecma_is_value_integer_number (args_len_or_this))
    {
      args_length = ecma_get_integer_from_value (args_len_or_this);
    }

#if ENABLED (JERRY_ES2015)
    if (ECMA_GET_FIRST_BIT_FROM_POINTER_TAG (bound_func_p->header.u.bound_function.target_function))
    {
      return NULL;
    }

    length_attributes = ECMA_PROPERTY_FLAG_CONFIGURABLE;
    length = bound_func_p->target_length - (args_length - 1);

    /* Set tag bit to represent initialized 'length' property */
    ECMA_SET_FIRST_BIT_TO_POINTER_TAG (bound_func_p->header.u.bound_function.target_function);
#else /* !ENABLED (JERRY_ES2015) */
    length_attributes = ECMA_PROPERTY_FIXED;

    ecma_object_t *target_func_p;
    target_func_p = ECMA_GET_NON_NULL_POINTER_FROM_POINTER_TAG (ecma_object_t,
                                                                bound_func_p->header.u.bound_function.target_function);

    if (ecma_object_get_class_name (target_func_p) == LIT_MAGIC_STRING_FUNCTION_UL)
    {
      /* The property_name_p argument contains the 'length' string. */
      ecma_value_t get_len_value = ecma_op_object_get (target_func_p, property_name_p);

      JERRY_ASSERT (!ECMA_IS_VALUE_ERROR (get_len_value));
      JERRY_ASSERT (ecma_is_value_integer_number (get_len_value));

      length = ecma_get_integer_from_value (get_len_value) - (args_length - 1);
    }
#endif /* ENABLED (JERRY_ES2015) */

    if (length < 0)
    {
      length = 0;
    }

    ecma_property_t *len_prop_p;
    ecma_property_value_t *len_prop_value_p = ecma_create_named_data_property (object_p,
                                                                               property_name_p,
                                                                               length_attributes,
                                                                               &len_prop_p);

    len_prop_value_p->value = ecma_make_integer_value (length);
    return len_prop_p;
  }

  if (ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_CALLER)
      || ecma_compare_ecma_string_to_magic_id (property_name_p, LIT_MAGIC_STRING_ARGUMENTS))
  {
    ecma_object_t *thrower_p = ecma_builtin_get (ECMA_BUILTIN_ID_TYPE_ERROR_THROWER);

    ecma_property_t *caller_prop_p;
    /* The string_p argument contans the name. */
    ecma_create_named_accessor_property (object_p,
                                         property_name_p,
                                         thrower_p,
                                         thrower_p,
                                         ECMA_PROPERTY_FIXED,
                                         &caller_prop_p);
    return caller_prop_p;
  }

  return NULL;
} /* ecma_op_bound_function_try_to_lazy_instantiate_property */

/**
 * List names of a Function object's lazy instantiated properties,
 * adding them to corresponding string collections
 *
 * See also:
 *          ecma_op_function_try_to_lazy_instantiate_property
 */
void
ecma_op_function_list_lazy_property_names (ecma_object_t *object_p, /**< functionobject */
                                           uint32_t opts, /**< listing options using flags
                                                           *   from ecma_list_properties_options_t */
                                           ecma_collection_t *main_collection_p, /**< 'main' collection */
                                           ecma_collection_t *non_enum_collection_p) /**< skipped
                                                                                      *   'non-enumerable'
                                                                                      *   collection */
{
  JERRY_UNUSED (main_collection_p);

  ecma_collection_t *for_non_enumerable_p = (opts & ECMA_LIST_ENUMERABLE) ? non_enum_collection_p : main_collection_p;

#if ENABLED (JERRY_ES2015)
  ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) object_p;
  if (!ECMA_GET_FIRST_BIT_FROM_POINTER_TAG (ext_func_p->u.function.scope_cp))
  {
    /* Unintialized 'length' property is non-enumerable (ECMA-262 v6, 19.2.4.1) */
    ecma_collection_push_back (for_non_enumerable_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_LENGTH));
  }
#else /* !ENABLED (JERRY_ES2015) */
  /* 'length' property is non-enumerable (ECMA-262 v5, 13.2.5) */
  ecma_collection_push_back (for_non_enumerable_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_LENGTH));
#endif /* ENABLED (JERRY_ES2015) */

  const ecma_compiled_code_t *bytecode_data_p;
  bytecode_data_p = ecma_op_function_get_compiled_code ((ecma_extended_object_t *) object_p);

#if ENABLED (JERRY_ES2015)
  if (bytecode_data_p->status_flags & (CBC_CODE_FLAGS_ARROW_FUNCTION | CBC_CODE_FLAGS_ACCESSOR))
  {
    return;
  }
#endif /* ENABLED (JERRY_ES2015) */

  /* 'prototype' property is non-enumerable (ECMA-262 v5, 13.2.18) */
  ecma_collection_push_back (for_non_enumerable_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_PROTOTYPE));

#if ENABLED (JERRY_ES2015)
  bool append_caller_and_arguments = !(bytecode_data_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE);
#else /* !ENABLED (JERRY_ES2015) */
  bool append_caller_and_arguments = (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE);
#endif /* ENABLED (JERRY_ES2015) */

  if (append_caller_and_arguments)
  {
    /* 'caller' property is non-enumerable (ECMA-262 v5, 13.2.5) */
    ecma_collection_push_back (for_non_enumerable_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_CALLER));

    /* 'arguments' property is non-enumerable (ECMA-262 v5, 13.2.5) */
    ecma_collection_push_back (for_non_enumerable_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_ARGUMENTS));
  }
} /* ecma_op_function_list_lazy_property_names */

/**
 * List names of an External Function object's lazy instantiated properties,
 * adding them to corresponding string collections
 *
 * See also:
 *          ecma_op_external_function_try_to_lazy_instantiate_property
 */
void
ecma_op_external_function_list_lazy_property_names (ecma_object_t *object_p, /**< function object */
                                                    uint32_t opts, /**< listing options using flags
                                                                    *   from ecma_list_properties_options_t */
                                                    ecma_collection_t *main_collection_p, /**< 'main' collection */
                                                    ecma_collection_t *non_enum_collection_p) /**< skipped
                                                                                               *   collection */
{
  JERRY_UNUSED (main_collection_p);

  ecma_collection_t *for_non_enumerable_p = (opts & ECMA_LIST_ENUMERABLE) ? non_enum_collection_p : main_collection_p;

#if !ENABLED (JERRY_ES2015)
  JERRY_UNUSED (object_p);
#else /* ENABLED (JERRY_ES2015) */
  if (!ecma_op_ordinary_object_has_own_property (object_p, ecma_get_magic_string (LIT_MAGIC_STRING_PROTOTYPE)))
#endif /* !ENABLED (JERRY_ES2015) */
  {
    /* 'prototype' property is non-enumerable (ECMA-262 v5, 13.2.18) */
    ecma_collection_push_back (for_non_enumerable_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_PROTOTYPE));
  }
} /* ecma_op_external_function_list_lazy_property_names */

/**
 * List names of a Bound Function object's lazy instantiated properties,
 * adding them to corresponding string collections
 *
 * See also:
 *          ecma_op_bound_function_try_to_lazy_instantiate_property
 */
void
ecma_op_bound_function_list_lazy_property_names (ecma_object_t *object_p, /**< bound function object*/
                                                 uint32_t opts, /**< listing options using flags
                                                                 *   from ecma_list_properties_options_t */
                                                 ecma_collection_t *main_collection_p, /**< 'main' collection */
                                                 ecma_collection_t *non_enum_collection_p) /**< skipped
                                                                                            *   'non-enumerable'
                                                                                            *   collection */
{
  JERRY_UNUSED (main_collection_p);

  ecma_collection_t *for_non_enumerable_p = (opts & ECMA_LIST_ENUMERABLE) ? non_enum_collection_p : main_collection_p;

#if ENABLED (JERRY_ES2015)
  /* Unintialized 'length' property is non-enumerable (ECMA-262 v6, 19.2.4.1) */
  ecma_bound_function_t *bound_func_p = (ecma_bound_function_t *) object_p;
  if (!ECMA_GET_FIRST_BIT_FROM_POINTER_TAG (bound_func_p->header.u.bound_function.target_function))
  {
    ecma_collection_push_back (for_non_enumerable_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_LENGTH));
  }
#else /* !ENABLED (JERRY_ES2015) */
  JERRY_UNUSED (object_p);
  /* 'length' property is non-enumerable (ECMA-262 v5, 13.2.5) */
  ecma_collection_push_back (for_non_enumerable_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_LENGTH));
#endif /* ENABLED (JERRY_ES2015) */

  /* 'caller' property is non-enumerable (ECMA-262 v5, 13.2.5) */
  ecma_collection_push_back (for_non_enumerable_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_CALLER));

  /* 'arguments' property is non-enumerable (ECMA-262 v5, 13.2.5) */
  ecma_collection_push_back (for_non_enumerable_p, ecma_make_magic_string_value (LIT_MAGIC_STRING_ARGUMENTS));
} /* ecma_op_bound_function_list_lazy_property_names */

/**
 * @}
 * @}
 */