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03274c112a
Only the global object bound to the root node of the lexical environment tree does not have a provideThis flag, and ecma_op_implicit_this_value() falls back to the global object. Hence we get the same effect regardless of provideThis. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
140 lines
4.1 KiB
C
140 lines
4.1 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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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-function-object.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-lcache.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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{
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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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return ecma_fast_copy_value (ECMA_PROPERTY_VALUE_PTR (property_p)->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_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_lcache_lookup (binding_obj_p, name_p);
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if (property_p != NULL)
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{
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ecma_property_value_t *prop_value_p = ECMA_PROPERTY_VALUE_PTR (property_p);
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if (ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDDATA)
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{
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return ecma_fast_copy_value (prop_value_p->value);
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}
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JERRY_ASSERT (ECMA_PROPERTY_GET_TYPE (*property_p) == ECMA_PROPERTY_TYPE_NAMEDACCESSOR);
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ecma_object_t *getter_p = ecma_get_named_accessor_property_getter (prop_value_p);
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if (getter_p == NULL)
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{
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return ECMA_VALUE_UNDEFINED;
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}
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ecma_value_t base_value = ecma_make_object_value (binding_obj_p);
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return ecma_op_function_call (getter_p, base_value, NULL, 0);
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}
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ecma_value_t prop_value = ecma_op_object_find (binding_obj_p, name_p);
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if (ecma_is_value_found (prop_value))
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{
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return prop_value;
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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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#ifdef JERRY_ENABLE_ERROR_MESSAGES
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ecma_value_t name_val = ecma_make_string_value (name_p);
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ecma_value_t error_value = ecma_raise_standard_error_with_format (ECMA_ERROR_REFERENCE,
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"% is not defined",
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name_val);
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#else /* !JERRY_ENABLE_ERROR_MESSAGES */
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ecma_value_t error_value = ecma_raise_reference_error (NULL);
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#endif /* JERRY_ENABLE_ERROR_MESSAGES */
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return error_value;
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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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