Implement Proxy object [[Delete]] internal method (#3616)

The algorithm is based on ECMA-262 v6, 9.5.10 JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu
2020-03-18 16:52:24 +01:00
parent 85fced2632
commit b2e54e915b
3 changed files with 206 additions and 5 deletions
@@ -781,8 +781,85 @@ ecma_proxy_object_delete_property (ecma_object_t *obj_p, /**< proxy object */
                                   ecma_string_t *prop_name_p) /**< property name */
 {
  JERRY_ASSERT (ECMA_OBJECT_IS_PROXY (obj_p));
-  JERRY_UNUSED_2 (obj_p, prop_name_p);
-  return ecma_raise_type_error (ECMA_ERR_MSG ("UNIMPLEMENTED: Proxy.[[Delete]]"));
+
+  ecma_proxy_object_t *proxy_obj_p = (ecma_proxy_object_t *) obj_p;
+
+  /* 2. */
+  ecma_value_t handler = proxy_obj_p->handler;
+
+  /* 3-6.*/
+  ecma_value_t trap = ecma_validate_proxy_object (handler, LIT_MAGIC_STRING_DELETE_PROPERTY_UL);
+
+  /* 7. */
+  if (ECMA_IS_VALUE_ERROR (trap))
+  {
+    return trap;
+  }
+
+  ecma_value_t target = proxy_obj_p->target;
+  ecma_object_t *target_obj_p = ecma_get_object_from_value (target);
+
+  /* 8. */
+  if (ecma_is_value_undefined (trap))
+  {
+    return ecma_op_object_delete (target_obj_p, prop_name_p, false);
+  }
+
+  ecma_object_t *func_obj_p = ecma_get_object_from_value (trap);
+  ecma_value_t prop_name_value = ecma_make_prop_name_value (prop_name_p);
+  ecma_value_t args[] = { target, prop_name_value };
+
+  /* 9. */
+  ecma_value_t trap_result = ecma_op_function_call (func_obj_p, handler, args, 2);
+
+  ecma_deref_object (func_obj_p);
+
+  /* 10. */
+  if (ECMA_IS_VALUE_ERROR (trap_result))
+  {
+    return trap_result;
+  }
+
+  bool boolean_trap_result = ecma_op_to_boolean (trap_result);
+
+  ecma_free_value (trap_result);
+
+  /* 11. */
+  if (!boolean_trap_result)
+  {
+    return ECMA_VALUE_FALSE;
+  }
+
+  /* 12. */
+  ecma_property_descriptor_t target_desc;
+
+  ecma_value_t status = ecma_op_object_get_own_property_descriptor (target_obj_p, prop_name_p, &target_desc);
+
+  /* 13. */
+  if (ECMA_IS_VALUE_ERROR (status))
+  {
+    return status;
+  }
+
+  /* 14. */
+  if (ecma_is_value_false (status))
+  {
+    return ECMA_VALUE_TRUE;
+  }
+
+  ecma_value_t ret_value = ECMA_VALUE_TRUE;
+
+  /* 15. */
+  if (!(target_desc.flags & ECMA_PROP_IS_CONFIGURABLE))
+  {
+    ret_value = ecma_raise_type_error (ECMA_ERR_MSG ("Trap returned truish for property which is "
+                                                     "non-configurable in the proxy target."));
+  }
+
+  ecma_free_property_descriptor (&target_desc);
+
+  /* 16. */
+  return ret_value;
 } /* ecma_proxy_object_delete_property */

 /**
@@ -798,7 +798,8 @@ LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_ARRAY_ITERATOR_UL, "Array Iterator")
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_REFERENCE_ERROR_UL, "ReferenceError")
 #endif
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_DEFINE_PROPERTY_UL, "defineProperty")
-#if ENABLED (JERRY_ES2015_BUILTIN_REFLECT)
+#if ENABLED (JERRY_ES2015_BUILTIN_PROXY) \
+|| ENABLED (JERRY_ES2015_BUILTIN_REFLECT)
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_DELETE_PROPERTY_UL, "deleteProperty")
 #endif
 LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_GET_PROTOTYPE_OF_UL, "getPrototypeOf")