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Implement array/object destructuring (#3305)

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This patch implements the core functionality of destructuring patterns.
Function argument/for in-of pattern are currently unsupported.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2019-11-14 13:49:49 +01:00
committed by Zoltan Herczeg
parent b4b55a67a2
commit 213544ae47
19 changed files with 1628 additions and 177 deletions
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jerry-core/parser/js/js-scanner-util.c
+77 -2
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@@ -1033,7 +1033,6 @@ scanner_scope_find_let_declaration (parser_context_t *context_p, /**< context */
lex_env_p = ECMA_GET_NON_NULL_POINTER (ecma_object_t, lex_env_p->u2.outer_reference_cp);
}
#if ENABLED (JERRY_ES2015)
if (ecma_get_lex_env_type (lex_env_p) == ECMA_LEXICAL_ENVIRONMENT_DECLARATIVE)
{
ecma_property_t *property_p = ecma_find_named_property (lex_env_p, name_p);
@@ -1044,7 +1043,6 @@ scanner_scope_find_let_declaration (parser_context_t *context_p, /**< context */
return true;
}
}
#endif /* ENABLED (JERRY_ES2015) */
ecma_deref_ecma_string (name_p);
return false;
@@ -1144,6 +1142,80 @@ scanner_detect_invalid_let (parser_context_t *context_p, /**< context */
}
} /* scanner_detect_invalid_let */
/**
* Push the values required for destructuring assignment or binding parsing.
*/
void
scanner_push_destructuring_pattern (parser_context_t *context_p, /**< context */
scanner_context_t *scanner_context_p, /**< scanner context */
uint8_t binding_type, /**< type of destructuring binding pattern */
bool is_nested) /**< nested declaration */
{
JERRY_ASSERT (binding_type != SCANNER_BINDING_NONE || !is_nested);
scanner_source_start_t source_start;
source_start.source_p = context_p->source_p;
parser_stack_push (context_p, &source_start, sizeof (scanner_source_start_t));
parser_stack_push_uint8 (context_p, scanner_context_p->binding_type);
scanner_context_p->binding_type = binding_type;
if (SCANNER_NEEDS_BINDING_LIST (binding_type))
{
scanner_binding_list_t *binding_list_p;
binding_list_p = (scanner_binding_list_t *) scanner_malloc (context_p, sizeof (scanner_binding_list_t));
binding_list_p->prev_p = scanner_context_p->active_binding_list_p;
binding_list_p->items_p = NULL;
binding_list_p->is_nested = is_nested;
scanner_context_p->active_binding_list_p = binding_list_p;
}
} /* scanner_push_destructuring_pattern */
/**
* Pop binding list.
*/
void
scanner_pop_binding_list (scanner_context_t *scanner_context_p) /**< scanner context */
{
scanner_binding_list_t *binding_list_p = scanner_context_p->active_binding_list_p;
scanner_binding_item_t *item_p = binding_list_p->items_p;
scanner_binding_list_t *prev_binding_list_p = binding_list_p->prev_p;
bool is_nested = binding_list_p->is_nested;
scanner_free (binding_list_p, sizeof (scanner_binding_list_t));
scanner_context_p->active_binding_list_p = prev_binding_list_p;
JERRY_ASSERT (binding_list_p != NULL);
if (!is_nested)
{
while (item_p != NULL)
{
scanner_binding_item_t *next_p = item_p->next_p;
JERRY_ASSERT (item_p->literal_p->type & SCANNER_LITERAL_IS_LOCAL);
scanner_free (item_p, sizeof (scanner_binding_item_t));
item_p = next_p;
}
return;
}
JERRY_ASSERT (prev_binding_list_p != NULL);
while (item_p != NULL)
{
scanner_binding_item_t *next_p = item_p->next_p;
item_p->next_p = prev_binding_list_p->items_p;
prev_binding_list_p->items_p = item_p;
item_p = next_p;
}
} /* scanner_pop_binding_list */
#endif /* ENABLED (JERRY_ES2015) */
/**
@@ -1215,6 +1287,9 @@ scanner_cleanup (parser_context_t *context_p) /**< context */
case SCANNER_TYPE_FOR_OF:
#endif /* ENABLED (JERRY_ES2015) */
case SCANNER_TYPE_CASE:
#if ENABLED (JERRY_ES2015)
case SCANNER_TYPE_INITIALIZER:
#endif /* ENABLED (JERRY_ES2015) */
{
size = sizeof (scanner_location_info_t);
break;