mirror of
https://github.com/jerryscript-project/jerryscript.git
synced 2025-12-15 16:29:21 +00:00
41337dbd59
Short summary of the changes: - The ecma_reference_t is removed, and its helper functions are deleted. - The delete operation does not depend on ecma_reference_t anymore. - A new resolve function is added which returns the current value of a named binding in the context chain. - The vm_op_set_value does not perform type conversions when its arguments has the appropriate types. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
125 lines
3.5 KiB
C
125 lines
3.5 KiB
C
/* Copyright 2014-2016 Samsung Electronics Co., Ltd.
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* Copyright 2016 University of Szeged.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "ecma-exceptions.h"
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#include "ecma-gc.h"
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#include "ecma-globals.h"
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#include "ecma-helpers.h"
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#include "ecma-lex-env.h"
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#include "ecma-objects.h"
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#include "ecma-reference.h"
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#include "jrt.h"
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/** \addtogroup ecma ECMA
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* @{
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*
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* \addtogroup references ECMA-Reference
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* @{
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*/
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/**
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* Resolve syntactic reference.
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*
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* @return if reference was resolved successfully,
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* pointer to lexical environment - reference's base,
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* else - NULL.
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*/
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ecma_object_t *
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ecma_op_resolve_reference_base (ecma_object_t *lex_env_p, /**< starting lexical environment */
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ecma_string_t *name_p) /**< identifier's name */
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{
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JERRY_ASSERT (lex_env_p != NULL);
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ecma_object_t *lex_env_iter_p = lex_env_p;
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while (lex_env_iter_p != NULL)
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{
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if (ecma_op_has_binding (lex_env_iter_p, name_p))
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{
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return lex_env_iter_p;
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}
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lex_env_iter_p = ecma_get_lex_env_outer_reference (lex_env_iter_p);
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}
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return NULL;
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} /* ecma_op_resolve_reference_base */
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/**
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* Resolve value corresponding to reference.
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*
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* @return value of the reference
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*/
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ecma_value_t
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ecma_op_resolve_reference_value (ecma_object_t *lex_env_p, /**< starting lexical environment */
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ecma_string_t *name_p, /**< identifier's name */
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bool is_strict) /**< strict mode */
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{
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JERRY_ASSERT (lex_env_p != NULL);
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while (lex_env_p != NULL)
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{
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if (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE)
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{
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ecma_property_t *property_p = ecma_find_named_property (lex_env_p, name_p);
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if (property_p != NULL)
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{
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ecma_value_t prop_value = ecma_get_named_data_property_value (property_p);
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/* is the binding mutable? */
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if (unlikely (!ecma_is_property_writable (property_p)
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&& ecma_is_value_empty (prop_value)))
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{
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/* unitialized mutable binding */
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if (is_strict)
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{
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return ecma_raise_reference_error (ECMA_ERR_MSG (""));
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}
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else
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{
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return ecma_make_simple_value (ECMA_SIMPLE_VALUE_UNDEFINED);
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}
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}
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return ecma_fast_copy_value (prop_value);
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}
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}
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else
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{
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JERRY_ASSERT (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_OBJECT_BOUND
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|| ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_THIS_OBJECT_BOUND);
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ecma_object_t *binding_obj_p = ecma_get_lex_env_binding_object (lex_env_p);
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ecma_property_t *property_p = ecma_op_object_get_property (binding_obj_p, name_p);
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if (property_p != NULL)
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{
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return ecma_op_object_get (binding_obj_p, name_p);
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}
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}
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lex_env_p = ecma_get_lex_env_outer_reference (lex_env_p);
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}
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return ecma_raise_reference_error (ECMA_ERR_MSG (""));
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} /* ecma_op_resolve_reference_value */
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/**
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* @}
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* @}
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*/
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