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Implement for-await-of statement. (#3946)

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AsyncIteratorClose has not supported yet.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2020-06-30 11:21:50 +02:00
committed by GitHub
parent 0b404ea893
commit 5535ea88ac
20 changed files with 729 additions and 199 deletions
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jerry-core/ecma/base/ecma-globals.h
+34 -2
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@@ -1865,18 +1865,50 @@ typedef enum
ECMA_EXECUTABLE_OBJECT_COMPLETED = (1u << 0), /**< executable object is completed and cannot be resumed */
ECMA_EXECUTABLE_OBJECT_RUNNING = (1u << 1), /**< executable object is currently running */
/* Generator specific flags. */
ECMA_GENERATOR_ITERATE_AND_YIELD = (1u << 2), /**< the generator performs a yield* operation */
ECMA_EXECUTABLE_OBJECT_DO_AWAIT_OR_YIELD = (1u << 2), /**< the executable object performs
* an await or a yield* operation */
ECMA_ASYNC_GENERATOR_CALLED = (1u << 3), /**< the async generator was executed before */
/* This must be the last generator specific flag. */
ECMA_ASYNC_YIELD_ITERATOR_STATE_SHIFT = 4, /**< shift for async yield iterator state */
ECMA_AWAIT_STATE_SHIFT = 4, /**< shift for await states */
} ecma_executable_object_flags_t;
/**
* Async function states after an await is completed.
*/
typedef enum
{
ECMA_AWAIT_YIELD_NEXT, /**< wait for an iterator result object */
ECMA_AWAIT_YIELD_NEXT_RETURN, /**< wait for an iterator result object after a return operation */
ECMA_AWAIT_YIELD_RETURN, /**< wait for the argument passed to return operation */
ECMA_AWAIT_YIELD_NEXT_VALUE, /**< wait for the value property of an iterator result object */
ECMA_AWAIT_YIELD_OPERATION, /**< wait for the generator operation (next/throw/return) */
ECMA_AWAIT_YIELD_CLOSE, /**< wait for the result of iterator close operation */
/* After adding new ECMA_AWAIT_YIELD items, the ECMA_AWAIT_YIELD_END should be updated. */
ECMA_AWAIT_FOR_NEXT, /**< wait for an iterator result object of for-await-of statement */
} ecma_await_states_t;
/**
* Checks whether the executable object is waiting for resuming.
*/
#define ECMA_EXECUTABLE_OBJECT_IS_SUSPENDED(extra_info) \
(!((extra_info) & (ECMA_EXECUTABLE_OBJECT_COMPLETED | ECMA_EXECUTABLE_OBJECT_RUNNING)))
/**
* Last item of yield* related await states.
*/
#define ECMA_AWAIT_YIELD_END ECMA_AWAIT_YIELD_CLOSE
/**
* Helper macro for ECMA_EXECUTABLE_OBJECT_RESUME_EXEC.
*/
#define ECMA_EXECUTABLE_OBJECT_RESUME_EXEC_MASK ((uint16_t) ~ECMA_EXECUTABLE_OBJECT_DO_AWAIT_OR_YIELD)
/**
* Resume execution of the byte code.
*/
#define ECMA_EXECUTABLE_OBJECT_RESUME_EXEC(executable_object_p) \
((executable_object_p)->extended_object.u.class_prop.extra_info &= ECMA_EXECUTABLE_OBJECT_RESUME_EXEC_MASK)
/**
* Enqueued task of an AsyncGenerator.
*