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Implement throwing ReferenceErrors for let/const variables. (#3264)

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JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2019-10-31 11:09:02 +01:00
committed by Dániel Bátyai
parent d1faed7d03
commit 6a342fcdd6
16 changed files with 306 additions and 75 deletions
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jerry-core/ecma/base/ecma-globals.h
+1
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@@ -188,6 +188,7 @@ enum
ECMA_VALUE_REGISTER_REF = ECMA_MAKE_VALUE (8), /**< register reference,
* a special "base" value for vm */
ECMA_VALUE_IMPLICIT_CONSTRUCTOR = ECMA_MAKE_VALUE (9), /**< special value for bound class constructors */
ECMA_VALUE_UNINITIALIZED = ECMA_MAKE_VALUE (10), /**< a special value for uninitialized let/const declarations */
};
#if !ENABLED (JERRY_NUMBER_TYPE_FLOAT64)
jerry-core/ecma/operations/ecma-get-put-value.c
+11 -1
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@@ -204,7 +204,17 @@ ecma_op_put_value_lex_env_base (ecma_object_t *lex_env_p, /**< lexical environme
{
if (ecma_is_property_writable (*property_p))
{
ecma_named_data_property_assign_value (lex_env_p, ECMA_PROPERTY_VALUE_PTR (property_p), value);
ecma_property_value_t *property_value_p = ECMA_PROPERTY_VALUE_PTR (property_p);
#if ENABLED (JERRY_ES2015)
if (JERRY_UNLIKELY (property_value_p->value == ECMA_VALUE_UNINITIALIZED))
{
return ecma_raise_reference_error (ECMA_ERR_MSG ("Variables declared by let/const must be"
" initialized before writing their value."));
}
#endif /* ENABLED (JERRY_ES2015) */
ecma_named_data_property_assign_value (lex_env_p, property_value_p, value);
}
else if (is_strict)
{
jerry-core/ecma/operations/ecma-reference.c
+11 -1
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@@ -114,7 +114,17 @@ ecma_op_resolve_reference_value (ecma_object_t *lex_env_p, /**< starting lexical
if (property_p != NULL)
{
return ecma_fast_copy_value (ECMA_PROPERTY_VALUE_PTR (property_p)->value);
ecma_property_value_t *property_value_p = ECMA_PROPERTY_VALUE_PTR (property_p);
#if ENABLED (JERRY_ES2015)
if (JERRY_UNLIKELY (property_value_p->value == ECMA_VALUE_UNINITIALIZED))
{
return ecma_raise_reference_error (ECMA_ERR_MSG ("Variables declared by let/const must be"
" initialized before reading their value."));
}
#endif /* ENABLED (JERRY_ES2015) */
return ecma_fast_copy_value (property_value_p->value);
}
}
else if (lex_env_type == ECMA_LEXICAL_ENVIRONMENT_THIS_OBJECT_BOUND)