Implementing [[DefaultValue]] general objects' method.

src/libecmaobjects/ecma-globals.h

@@ -745,6 +745,8 @@ typedef enum
   ECMA_MAGIC_STRING_TAN, /**< "tan" */
   ECMA_MAGIC_STRING_FROM_CHAR_CODE_UL, /**< "fromCharCode" */
   ECMA_MAGIC_STRING_IS_ARRAY_UL, /**< "isArray" */
+  ECMA_MAGIC_STRING_TO_STRING_UL, /**< "toString" */
+  ECMA_MAGIC_STRING_VALUE_OF_UL, /**< "valueOf" */
   ECMA_MAGIC_STRING__EMPTY, /**< "" */
   ECMA_MAGIC_STRING__COUNT /**< number of magic strings */
 } ecma_magic_string_id_t;

src/libecmaobjects/ecma-helpers-string.c

@@ -1341,6 +1341,8 @@ ecma_get_magic_string_zt (ecma_magic_string_id_t id) /**< magic string id */
     case ECMA_MAGIC_STRING_TAN: return (ecma_char_t*) "tan";
     case ECMA_MAGIC_STRING_FROM_CHAR_CODE_UL: return (ecma_char_t*) "fromCharCode";
     case ECMA_MAGIC_STRING_IS_ARRAY_UL: return (ecma_char_t*) "isArray";
+    case ECMA_MAGIC_STRING_TO_STRING_UL: return (ecma_char_t*) "toString";
+    case ECMA_MAGIC_STRING_VALUE_OF_UL: return (ecma_char_t*) "valueOf";
     case ECMA_MAGIC_STRING__EMPTY: return (ecma_char_t*) "";
     case ECMA_MAGIC_STRING__COUNT: break;
   }

src/libecmaoperations/ecma-conversion.h

@@ -33,9 +33,6 @@
 typedef enum
 {
   ECMA_PREFERRED_TYPE_NO, /**< no preferred type is specified */
-  ECMA_PREFERRED_TYPE_UNDEFINED, /**< Undefined */
-  ECMA_PREFERRED_TYPE_NULL, /**< Null */
-  ECMA_PREFERRED_TYPE_BOOLEAN, /**< Boolean */
   ECMA_PREFERRED_TYPE_NUMBER, /**< Number */
   ECMA_PREFERRED_TYPE_STRING /**< String */
 } ecma_preferred_type_hint_t;

src/libecmaoperations/ecma-objects-general.c

@@ -554,7 +554,79 @@ ecma_op_general_object_default_value (ecma_object_t *obj_p, /**< the object */
   JERRY_ASSERT(obj_p != NULL
                && !ecma_is_lexical_environment (obj_p));
 
-  JERRY_UNIMPLEMENTED_REF_UNUSED_VARS(obj_p, hint);
+  if (hint == ECMA_PREFERRED_TYPE_NO)
+  {
+    ecma_property_t *class_prop_p = ecma_get_internal_property (obj_p,
+                                                                ECMA_INTERNAL_PROPERTY_CLASS);
+    ecma_object_class_t obj_class = (ecma_object_class_t) class_prop_p->u.internal_property.value;
+
+    if (obj_class == ECMA_OBJECT_CLASS_DATE)
+    {
+      hint = ECMA_PREFERRED_TYPE_STRING;
+    }
+    else
+    {
+      hint = ECMA_PREFERRED_TYPE_NUMBER;
+    }
+  }
+
+  const uint32_t tries_num = 2;
+  ecma_magic_string_id_t function_names [tries_num];
+
+  if (hint == ECMA_PREFERRED_TYPE_STRING)
+  {
+    function_names[0] = ECMA_MAGIC_STRING_TO_STRING_UL;
+    function_names[1] = ECMA_MAGIC_STRING_VALUE_OF_UL;
+  }
+  else
+  {
+    JERRY_ASSERT (hint == ECMA_PREFERRED_TYPE_NUMBER);
+
+    function_names[0] = ECMA_MAGIC_STRING_VALUE_OF_UL;
+    function_names[1] = ECMA_MAGIC_STRING_TO_STRING_UL;
+  }
+
+  for (uint32_t i = 0; i < tries_num; i++)
+  {
+    ecma_string_t *function_name_p = ecma_get_magic_string (function_names [i]);
+
+    ecma_completion_value_t function_value_get_completion = ecma_op_object_get (obj_p, function_name_p);
+
+    ecma_deref_ecma_string (function_name_p);
+
+    if (!ecma_is_completion_value_normal (function_value_get_completion))
+    {
+      return function_value_get_completion;
+    }
+
+    ecma_completion_value_t call_completion = ecma_make_empty_completion_value ();
+
+    if (ecma_op_is_callable (function_value_get_completion.u.value))
+    {
+      ecma_object_t *func_obj_p = ECMA_GET_POINTER (function_value_get_completion.u.value.value);
+
+      call_completion = ecma_op_function_call (func_obj_p,
+                                               ecma_make_object_value (obj_p),
+                                               NULL, 0);
+    }
+
+    ecma_free_completion_value (function_value_get_completion);
+
+    if (!ecma_is_completion_value_normal (call_completion))
+    {
+      return call_completion;
+    }
+
+    if (!ecma_is_completion_value_empty (call_completion)
+        && call_completion.u.value.value_type != ECMA_TYPE_OBJECT)
+    {
+      return call_completion;
+    }
+
+    ecma_free_completion_value (call_completion);
+  }
+
+  return ecma_make_throw_obj_completion_value (ecma_new_standard_error (ECMA_ERROR_TYPE));
 } /* ecma_op_general_object_default_value */
 
 /**