Fix the return value of jerry_to_property_descriptor function (#4371)

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com

docs/02.API-REFERENCE.md

@@ -4071,12 +4071,13 @@ This API function is equivalent to ToPropertyDescriptor operation defined in ECM
 It decodes the ECMAScript object and fills the fields of a JerryScript property descriptor.
 
 *Notes*:
-- The es.next profile enables this by default.
+- Returned value must be freed with [jerry_release_value](#jerry_release_value) when it
+  is no longer needed.
 
 **Prototype**
 
 ```c
-bool
+jerry_value_t
 jerry_to_property_descriptor (jerry_value_t obj_value, jerry_property_descriptor_t *out_prop_desc_p);
 ```
 
@@ -4084,8 +4085,10 @@ jerry_to_property_descriptor (jerry_value_t obj_value, jerry_property_descriptor
 - `src_prop_desc_p` - the output property descriptor.
 - return
   - [jerry_value_t](#jerry_value_t)
-  - true - if success
-  - false - if error occurs
+  - true, if success
+  - thrown error, otherwise
+
+*New in version [[NEXT_RELEASE]]*.
 
 **Example**
 
@@ -4102,9 +4105,9 @@ example (void)
   jerry_value_t value = jerry_create_boolean (true);
   jerry_property_descriptor_t prop_desc;
 
-  jerry_set_property (object, prop_name, prop_name);
+  jerry_release_value (jerry_set_property (object, prop_name, prop_name));
 
-  jerry_to_property_descriptor (object, &prop_desc);
+  jerry_release_value (jerry_to_property_descriptor (object, &prop_desc));
 
   jerry_release_value (object);
   jerry_release_value (prop_name);

jerry-core/api/jerry.c

@@ -4043,7 +4043,8 @@ jerry_object_get_property_names (const jerry_value_t obj_val, /**< object */
   return ecma_op_new_array_object_from_collection (result_p, false);
 } /* jerry_object_get_property_names */
 
-/** FromPropertyDescriptor abstract operation.
+/**
+ * FromPropertyDescriptor abstract operation.
  *
  * @return new jerry_value_t - if success
  *         value marked with error flag - otherwise
@@ -4068,39 +4069,29 @@ jerry_from_property_descriptor (const jerry_property_descriptor_t *src_prop_desc
 /**
  * ToPropertyDescriptor abstract operation.
  *
-* @return thrown error - if any conversion error happens
-*        ECMA_VALUE_TRUE - otherwise.
+ * @return true - if the conversion is successful
+ *         thrown error - otherwise
  */
-bool
+jerry_value_t
 jerry_to_property_descriptor (jerry_value_t obj_value, /**< object value */
                               jerry_property_descriptor_t *out_prop_desc_p) /**< [out] filled property descriptor
-                                                                               if return value is normal
-                                                                               empty completion value */
+                                                                             *   if return value is true,
+                                                                             *   unmodified otherwise */
 {
   jerry_assert_api_available ();
 
-  if (!ecma_is_value_object (obj_value))
-  {
-    jerry_throw (ecma_raise_type_error (ECMA_ERR_MSG (wrong_args_msg_p)));
-  }
-
   ecma_property_descriptor_t prop_desc;
   jerry_value_t result = ecma_op_to_property_descriptor (obj_value, &prop_desc);
 
   if (ECMA_IS_VALUE_ERROR (result))
   {
-    return false;
+    return jerry_throw (result);
   }
+
+  JERRY_ASSERT (result == ECMA_VALUE_EMPTY);
+
   *out_prop_desc_p = jerry_property_descriptor_from_ecma (&prop_desc);
-
-  if (ECMA_IS_VALUE_ERROR (out_prop_desc_p->value))
-  {
-    jerry_release_value (result);
-    return false;
-  }
-
-  jerry_release_value (result);
-  return true;
+  return ECMA_VALUE_TRUE;
 } /* jerry_to_property_descriptor */
 
 /**

jerry-core/ecma/operations/ecma-conversion.c

@@ -717,14 +717,13 @@ ecma_op_from_property_descriptor (const ecma_property_descriptor_t *src_prop_des
  * See also:
  *          ECMA-262 v5, 8.10.5
  *
- * @return ecma value
- *         Returned value must be freed with ecma_free_value
+ * @return ECMA_VALUE_EMPTY if successful, ECMA_VALUE_ERROR otherwise
  */
 ecma_value_t
 ecma_op_to_property_descriptor (ecma_value_t obj_value, /**< object value */
                                 ecma_property_descriptor_t *out_prop_desc_p) /**< [out] filled property descriptor
-                                                                                  if return value is normal
-                                                                                  empty completion value */
+                                                                              *   if the operation is successful,
+                                                                              *   unmodified otherwise */
 {
   /* 1. */
   if (!ecma_is_value_object (obj_value))

jerry-core/include/jerryscript-core.h

@@ -663,7 +663,7 @@ bool jerry_foreach_object_property (const jerry_value_t obj_val, jerry_object_pr
 
 jerry_value_t jerry_object_get_property_names (const jerry_value_t obj_val, jerry_property_filter_t filter);
 jerry_value_t jerry_from_property_descriptor (const jerry_property_descriptor_t *src_prop_desc_p);
-bool jerry_to_property_descriptor (jerry_value_t obj_value, jerry_property_descriptor_t *out_prop_desc_p);
+jerry_value_t jerry_to_property_descriptor (jerry_value_t obj_value, jerry_property_descriptor_t *out_prop_desc_p);
 /**
  * Promise functions.
  */

tests/unit-core/test-to-property-descriptor.c

@@ -44,8 +44,9 @@ main (void)
   prop_name = jerry_create_string_from_utf8 ((jerry_char_t *) "configurable");
   TEST_ASSERT (jerry_set_property (object, prop_name, value));
 
-  bool result = jerry_to_property_descriptor (object, &prop_desc);
-  TEST_ASSERT (result);
+  jerry_value_t result = jerry_to_property_descriptor (object, &prop_desc);
+  TEST_ASSERT (jerry_value_is_boolean (result) && jerry_get_boolean_value (result));
+  jerry_release_value (result);
 
   prop_name = jerry_create_string_from_utf8 ((jerry_char_t *) "value");
   value = jerry_get_property (object, prop_name);
@@ -71,6 +72,13 @@ main (void)
   jerry_release_value (prop_name);
   jerry_release_value (value);
   jerry_free_property_descriptor_fields (&prop_desc);
+
+  object = jerry_create_null ();
+  result = jerry_to_property_descriptor (object, &prop_desc);
+  TEST_ASSERT (jerry_value_is_error (result));
+  jerry_release_value (result);
+  jerry_release_value (object);
+
   jerry_cleanup ();
   return 0;
 } /* main */