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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/ecma/operations/ecma-async-generator-object.h
+64
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@@ -38,12 +38,76 @@ typedef enum
ECMA_ASYNC_GENERATOR_DO_RETURN, /**< async generator return operation */
} ecma_async_generator_operation_type_t;
/**
* AsyncGenerator yield iterator states.
*/
typedef enum
{
ECMA_ASYNC_YIELD_ITERATOR_AWAIT_NEXT, /**< wait for an iterator result object */
ECMA_ASYNC_YIELD_ITERATOR_AWAIT_NEXT_RETURN, /**< wait for an iterator result object after a return operation */
ECMA_ASYNC_YIELD_ITERATOR_AWAIT_RETURN, /**< wait for the argument passed to return operation */
ECMA_ASYNC_YIELD_ITERATOR_AWAIT_NEXT_VALUE, /**< wait for the value property of an iterator result object */
ECMA_ASYNC_YIELD_ITERATOR_AWAIT_OPERATION, /**< wait for the generator operation (next/throw/return) */
ECMA_ASYNC_YIELD_ITERATOR_AWAIT_CLOSE, /**< wait for the result of iterator close operation */
} ecma_async_yield_iterator_states_t;
/**
* Get the state of an async yield iterator.
*/
#define ECMA_ASYNC_YIELD_ITERATOR_GET_STATE(async_generator_object_p) \
((async_generator_object_p)->extended_object.u.class_prop.extra_info >> ECMA_ASYNC_YIELD_ITERATOR_STATE_SHIFT)
/**
* Set the state of an async yield iterator.
*/
#define ECMA_ASYNC_YIELD_ITERATOR_SET_STATE(async_generator_object_p, to) \
do \
{ \
uint16_t extra_info = (async_generator_object_p)->extended_object.u.class_prop.extra_info; \
extra_info &= ((1 << ECMA_ASYNC_YIELD_ITERATOR_STATE_SHIFT) - 1); \
extra_info |= (ECMA_ASYNC_YIELD_ITERATOR_AWAIT_ ## to) << ECMA_ASYNC_YIELD_ITERATOR_STATE_SHIFT; \
(async_generator_object_p)->extended_object.u.class_prop.extra_info = extra_info; \
} \
while (false)
/**
* Helper value for ECMA_ASYNC_YIELD_ITERATOR_END.
*/
#define ECMA_ASYNC_YIELD_ITERATOR_END_MASK \
(((1 << ECMA_ASYNC_YIELD_ITERATOR_STATE_SHIFT) - 1) - ECMA_GENERATOR_ITERATE_AND_YIELD)
/**
* Return from yield iterator.
*/
#define ECMA_ASYNC_YIELD_ITERATOR_END(async_generator_object_p) \
((async_generator_object_p)->extended_object.u.class_prop.extra_info &= ECMA_ASYNC_YIELD_ITERATOR_END_MASK)
/**
* Helper macro for ECMA_ASYNC_YIELD_ITERATOR_CHANGE_STATE.
*/
#define ECMA_ASYNC_YIELD_ITERATOR_CS1(from, to) \
((ECMA_ASYNC_YIELD_ITERATOR_AWAIT_ ## from) ^ (ECMA_ASYNC_YIELD_ITERATOR_AWAIT_ ## to))
/**
* Helper macro for ECMA_ASYNC_YIELD_ITERATOR_CHANGE_STATE.
*/
#define ECMA_ASYNC_YIELD_ITERATOR_CS2(from, to) \
(ECMA_ASYNC_YIELD_ITERATOR_CS1(from, to) << ECMA_ASYNC_YIELD_ITERATOR_STATE_SHIFT)
/**
* Change the state of an async yield iterator.
*/
#define ECMA_ASYNC_YIELD_ITERATOR_CHANGE_STATE(async_generator_object_p, from, to) \
((async_generator_object_p)->extended_object.u.class_prop.extra_info ^= ECMA_ASYNC_YIELD_ITERATOR_CS2 (from, to))
ecma_value_t ecma_async_generator_enqueue (vm_executable_object_t *async_generator_object_p,
ecma_async_generator_operation_type_t operation, ecma_value_t value);
void ecma_async_generator_run (vm_executable_object_t *async_generator_object_p);
void ecma_async_generator_finalize (vm_executable_object_t *async_generator_object_p, ecma_value_t value);
ecma_value_t ecma_async_yield_continue_await (vm_executable_object_t *async_generator_object_p, ecma_value_t value);
#endif /* ENABLED (JERRY_ESNEXT) */
/**