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LibJS: Convert length_of_array_like to ThrowCompletionOr

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This commit is contained in:
Idan Horowitz 2021-09-21 21:59:49 +03:00
parent 02a88c5063
commit e90e4ac1e2
11 changed files with 55 additions and 126 deletions
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15
Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp
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@ -42,13 +42,16 @@ ThrowCompletionOr<Value> require_object_coercible(GlobalObject& global_object, V
}
// 7.3.18 LengthOfArrayLike ( obj ), https://tc39.es/ecma262/#sec-lengthofarraylike
size_t length_of_array_like(GlobalObject& global_object, Object const& object)
ThrowCompletionOr<size_t> length_of_array_like(GlobalObject& global_object, Object const& object)
{
auto& vm = global_object.vm();
auto result = object.get(vm.names.length);
if (vm.exception())
return {};
return result.to_length(global_object);
if (auto* exception = vm.exception())
return throw_completion(exception->value());
auto length = result.to_length(global_object);
if (auto* exception = vm.exception())
return throw_completion(exception->value());
return length;
}
// 7.3.19 CreateListFromArrayLike ( obj [ , elementTypes ] ), https://tc39.es/ecma262/#sec-createlistfromarraylike
@ -66,9 +69,7 @@ ThrowCompletionOr<MarkedValueList> create_list_from_array_like(GlobalObject& glo
auto& array_like = value.as_object();
// 3. Let len be ? LengthOfArrayLike(obj).
auto length = length_of_array_like(global_object, array_like);
if (auto* exception = vm.exception())
return throw_completion(exception->value());
auto length = TRY(length_of_array_like(global_object, array_like));
// 4. Let list be a new empty List.
auto list = MarkedValueList { heap };