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LibJS: Convert the FlattenIntoArray AO to ThrowCompletionOr

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This commit is contained in:
Idan Horowitz 2021-10-23 02:09:46 +03:00
parent 953265805e
commit 36446c0bd5
1 changed files with 14 additions and 24 deletions
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38
Userland/Libraries/LibJS/Runtime/ArrayPrototype.cpp
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@ -1538,40 +1538,34 @@ JS_DEFINE_OLD_NATIVE_FUNCTION(ArrayPrototype::keys)
}
// 23.1.3.10.1 FlattenIntoArray ( target, source, sourceLen, start, depth [ , mapperFunction [ , thisArg ] ] ), https://tc39.es/ecma262/#sec-flattenintoarray
static size_t flatten_into_array(GlobalObject& global_object, Object& new_array, Object& array, size_t array_length, size_t target_index, double depth, FunctionObject* mapper_func = {}, Value this_arg = {})
static ThrowCompletionOr<size_t> flatten_into_array(GlobalObject& global_object, Object& new_array, Object& array, size_t array_length, size_t target_index, double depth, FunctionObject* mapper_func = {}, Value this_arg = {})
{
VERIFY(!mapper_func || (!this_arg.is_empty() && depth == 1));
auto& vm = global_object.vm();
for (size_t j = 0; j < array_length; ++j) {
auto value_exists = TRY_OR_DISCARD(array.has_property(j));
auto value_exists = TRY(array.has_property(j));
if (!value_exists)
continue;
auto value = TRY_OR_DISCARD(array.get(j));
auto value = TRY(array.get(j));
if (mapper_func)
value = TRY_OR_DISCARD(vm.call(*mapper_func, this_arg, value, Value(j), &array));
value = TRY(vm.call(*mapper_func, this_arg, value, Value(j), &array));
if (depth > 0 && TRY_OR_DISCARD(value.is_array(global_object))) {
if (vm.did_reach_stack_space_limit()) {
vm.throw_exception<Error>(global_object, ErrorType::CallStackSizeExceeded);
return {};
}
if (depth > 0 && TRY(value.is_array(global_object))) {
if (vm.did_reach_stack_space_limit())
return vm.throw_completion<Error>(global_object, ErrorType::CallStackSizeExceeded);
auto length = TRY_OR_DISCARD(length_of_array_like(global_object, value.as_object()));
target_index = flatten_into_array(global_object, new_array, value.as_object(), length, target_index, depth - 1);
if (vm.exception())
return {};
auto length = TRY(length_of_array_like(global_object, value.as_object()));
target_index = TRY(flatten_into_array(global_object, new_array, value.as_object(), length, target_index, depth - 1));
continue;
}
if (target_index >= MAX_ARRAY_LIKE_INDEX) {
vm.throw_exception<TypeError>(global_object, ErrorType::InvalidIndex);
return {};
}
if (target_index >= MAX_ARRAY_LIKE_INDEX)
return vm.throw_completion<TypeError>(global_object, ErrorType::InvalidIndex);
TRY_OR_DISCARD(new_array.create_data_property_or_throw(target_index, value));
TRY(new_array.create_data_property_or_throw(target_index, value));
++target_index;
}
@ -1593,9 +1587,7 @@ JS_DEFINE_OLD_NATIVE_FUNCTION(ArrayPrototype::flat)
auto* new_array = TRY_OR_DISCARD(array_species_create(global_object, *this_object, 0));
flatten_into_array(global_object, *new_array, *this_object, length, 0, depth);
if (vm.exception())
return {};
TRY_OR_DISCARD(flatten_into_array(global_object, *new_array, *this_object, length, 0, depth));
return new_array;
}
@ -1621,9 +1613,7 @@ JS_DEFINE_OLD_NATIVE_FUNCTION(ArrayPrototype::flat_map)
auto* array = TRY_OR_DISCARD(array_species_create(global_object, *object, 0));
// 5. Perform ? FlattenIntoArray(A, O, sourceLen, 0, 1, mapperFunction, thisArg).
flatten_into_array(global_object, *array, *object, source_length, 0, 1, &mapper_function.as_function(), this_arg);
if (vm.exception())
return {};
TRY_OR_DISCARD(flatten_into_array(global_object, *array, *object, source_length, 0, 1, &mapper_function.as_function(), this_arg));
// 6. Return A.
return array;