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Implement the Symbol builtin object (#2601)

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This patch contains the base functionalities that the new builtin object requires.

Currently unavailable:
 - print (Symbol('foo')) - this features requires the refactor of the print handler function
 - Several global symbol based builtin routines (follow up patch)

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2019-01-16 10:09:23 +01:00
committed by Robert Sipka
parent 08c7183ef8
commit 7e3d688e5b
43 changed files with 1896 additions and 212 deletions
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jerry-core/ecma/base/ecma-helpers-string.c
+50
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@@ -198,6 +198,42 @@ ecma_new_ecma_string_from_magic_string_ex_id (lit_magic_string_ex_id_t id) /**<
return string_desc_p;
} /* ecma_new_ecma_string_from_magic_string_ex_id */
#ifndef CONFIG_DISABLE_ES2015_SYMBOL_BUILTIN
/**
* Allocate new ecma-string and fill it with reference to the symbol descriptor
*
* @return pointer to ecma-string descriptor
*/
ecma_string_t *
ecma_new_symbol_from_descriptor_string (ecma_value_t string_desc) /**< ecma-string */
{
JERRY_ASSERT (!ecma_is_value_symbol (string_desc));
ecma_string_t *symbol_p = ecma_alloc_string ();
symbol_p->refs_and_container = ECMA_STRING_REF_ONE | ECMA_STRING_CONTAINER_SYMBOL;
symbol_p->u.symbol_descriptor = string_desc;
symbol_p->hash = (uint16_t) (((uintptr_t) symbol_p) >> ECMA_SYMBOL_HASH_SHIFT);
JERRY_ASSERT ((symbol_p->hash & ECMA_GLOBAL_SYMBOL_FLAG) == 0);
return symbol_p;
} /* ecma_new_symbol_from_descriptor_string */
/**
* Check whether an ecma-string contains an ecma-symbol
*
* @return true - if the ecma-string contains an ecma-symbol
* false - otherwise
*/
bool
ecma_prop_name_is_symbol (ecma_string_t *string_p) /**< ecma-string */
{
JERRY_ASSERT (string_p != NULL);
return (!ECMA_IS_DIRECT_STRING (string_p)
&& ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_SYMBOL);
} /* ecma_prop_name_is_symbol */
#endif /* !CONFIG_DISABLE_ES2015_SYMBOL_BUILTIN */
/**
* Allocate new ecma-string and fill it with characters from the utf8 string
*
@@ -934,6 +970,13 @@ ecma_deref_ecma_string (ecma_string_t *string_p) /**< ecma-string */
ecma_free_value (string_p->u.lit_number);
break;
}
#ifndef CONFIG_DISABLE_ES2015_SYMBOL_BUILTIN
case ECMA_STRING_CONTAINER_SYMBOL:
{
ecma_free_value (string_p->u.symbol_descriptor);
break;
}
#endif /* !CONFIG_DISABLE_ES2015_SYMBOL_BUILTIN */
default:
{
JERRY_ASSERT (ECMA_STRING_GET_CONTAINER (string_p) == ECMA_STRING_CONTAINER_UINT32_IN_DESC
@@ -1773,6 +1816,13 @@ ecma_compare_ecma_strings (const ecma_string_t *string1_p, /**< ecma-string */
return false;
}
#ifndef CONFIG_DISABLE_ES2015_SYMBOL_BUILTIN
if (string1_container == ECMA_STRING_CONTAINER_SYMBOL)
{
return false;
}
#endif /* !CONFIG_DISABLE_ES2015_SYMBOL_BUILTIN */
if (string1_container >= ECMA_STRING_CONTAINER_UINT32_IN_DESC)
{
return string1_p->u.common_uint32_field == string2_p->u.common_uint32_field;