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Implement async generators (#3916)

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JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2020-06-22 13:54:18 +02:00
committed by GitHub
parent 0f0041d720
commit b2a6109430
32 changed files with 1247 additions and 50 deletions
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jerry-core/ecma/operations/ecma-function-object.c
+42 -10
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@@ -395,23 +395,28 @@ ecma_op_create_dynamic_function (const ecma_value_t *arguments_list_p, /**< argu
#if ENABLED (JERRY_ESNEXT)
ecma_object_t *new_target_p = JERRY_CONTEXT (current_new_target);
bool is_generator_func = parse_opts & ECMA_PARSE_GENERATOR_FUNCTION;
if (is_generator_func)
if (JERRY_UNLIKELY (parse_opts & (ECMA_PARSE_GENERATOR_FUNCTION | ECMA_PARSE_ASYNC_FUNCTION)))
{
fallback_proto = ECMA_BUILTIN_ID_GENERATOR;
}
if (new_target_p == NULL)
{
if (is_generator_func)
if (parse_opts & ECMA_PARSE_ASYNC_FUNCTION)
{
fallback_proto = ECMA_BUILTIN_ID_ASYNC_GENERATOR;
if (new_target_p == NULL)
{
new_target_p = ecma_builtin_get (ECMA_BUILTIN_ID_ASYNC_GENERATOR_FUNCTION);
}
}
else if (new_target_p == NULL)
{
new_target_p = ecma_builtin_get (ECMA_BUILTIN_ID_GENERATOR_FUNCTION);
}
else
{
new_target_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION);
}
}
else if (new_target_p == NULL)
{
new_target_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION);
}
ecma_object_t *proto = ecma_op_get_prototype_from_constructor (new_target_p, fallback_proto);
@@ -475,6 +480,20 @@ ecma_op_create_generator_function_object (ecma_object_t *scope_p, /**< function'
return ecma_op_create_function_object (scope_p, bytecode_data_p, ECMA_BUILTIN_ID_GENERATOR);
} /* ecma_op_create_generator_function_object */
/**
* AsyncGeneratorFunction object creation operation.
*
* See also: ECMA-262 v10, 25.3
*
* @return pointer to newly created Function object
*/
ecma_object_t *
ecma_op_create_async_generator_function_object (ecma_object_t *scope_p, /**< function's scope */
const ecma_compiled_code_t *bytecode_data_p) /**< byte-code array */
{
return ecma_op_create_function_object (scope_p, bytecode_data_p, ECMA_BUILTIN_ID_ASYNC_GENERATOR);
} /* ecma_op_create_async_generator_function_object */
/**
* Arrow function object creation operation.
*
@@ -1294,6 +1313,11 @@ ecma_op_function_construct (ecma_object_t *func_obj_p, /**< Function object */
message_p = ECMA_ERR_MSG ("Async functions cannot be invoked with 'new'.");
break;
}
case CBC_FUNCTION_ASYNC_GENERATOR:
{
message_p = ECMA_ERR_MSG ("Async generator functions cannot be invoked with 'new'.");
break;
}
case CBC_FUNCTION_ARROW:
{
message_p = ECMA_ERR_MSG ("Arrow functions cannot be invoked with 'new'.");
@@ -1397,6 +1421,14 @@ ecma_op_lazy_instantiate_prototype_object (ecma_object_t *object_p) /**< the fun
ECMA_OBJECT_TYPE_GENERAL);
init_constructor = false;
}
if (CBC_FUNCTION_GET_TYPE (byte_code_p->status_flags) == CBC_FUNCTION_ASYNC_GENERATOR)
{
proto_object_p = ecma_create_object (ecma_builtin_get (ECMA_BUILTIN_ID_ASYNC_GENERATOR_PROTOTYPE),
0,
ECMA_OBJECT_TYPE_GENERAL);
init_constructor = false;
}
}
#endif /* ENABLED (JERRY_ESNEXT) */