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Implement yield* operator (#3923)

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Missing features:
- caching next() method (this also true for normal generators)
- automatic sync to async generator conversion

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2020-06-25 17:11:16 +02:00
committed by GitHub
parent c12c60c550
commit f88489beef
28 changed files with 1258 additions and 111 deletions
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jerry-core/vm/opcodes.c
+32 -2
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@@ -339,7 +339,7 @@ opfunc_append_to_spread_array (ecma_value_t *stack_top_p, /**< current stack top
ecma_value_t ret_value = ECMA_VALUE_ERROR;
ecma_value_t spread_value = stack_top_p[i];
ecma_value_t iterator = ecma_op_get_iterator (spread_value, ECMA_VALUE_EMPTY);
ecma_value_t iterator = ecma_op_get_iterator (spread_value, ECMA_VALUE_SYNC_ITERATOR);
if (!ECMA_IS_VALUE_ERROR (iterator))
{
@@ -432,7 +432,7 @@ opfunc_spread_arguments (ecma_value_t *stack_top_p, /**< pointer to the current
ecma_value_t spread_value = *stack_top_p++;
i++;
ecma_value_t iterator = ecma_op_get_iterator (spread_value, ECMA_VALUE_EMPTY);
ecma_value_t iterator = ecma_op_get_iterator (spread_value, ECMA_VALUE_SYNC_ITERATOR);
if (!ECMA_IS_VALUE_ERROR (iterator))
{
@@ -806,6 +806,36 @@ opfunc_resume_executable_object (vm_executable_object_t *executable_object_p, /*
return result;
} /* opfunc_resume_executable_object */
/**
* Fulfill the next promise of the async generator with the value
*/
void
opfunc_async_generator_yield (ecma_extended_object_t *async_generator_object_p, /**< async generator object */
ecma_value_t value) /**< value (takes the reference) */
{
ecma_async_generator_task_t *task_p;
task_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_async_generator_task_t,
async_generator_object_p->u.class_prop.u.head);
ecma_value_t iter_result = ecma_create_iter_result_object (value, ECMA_VALUE_FALSE);
ecma_fulfill_promise (task_p->promise, iter_result);
ecma_free_value (iter_result);
ecma_free_value (value);
ecma_value_t next = task_p->next;
async_generator_object_p->u.class_prop.u.head = next;
JERRY_ASSERT (task_p->operation_value == ECMA_VALUE_UNDEFINED);
jmem_heap_free_block (task_p, sizeof (ecma_async_generator_task_t));
if (!ECMA_IS_INTERNAL_VALUE_NULL (next))
{
ecma_value_t executable_object = ecma_make_object_value ((ecma_object_t *) async_generator_object_p);
ecma_enqueue_promise_async_generator_job (executable_object);
}
} /* opfunc_async_generator_yield */
/**
* Implicit class constructor handler when the classHeritage is not present.
*