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LibJS: Convert internal_prevent_extensions() to ThrowCompletionOr

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This commit is contained in:
Linus Groh 2021-09-29 00:13:41 +01:00
parent 9b4362f10a
commit 73bae7d779
12 changed files with 22 additions and 30 deletions
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22
Userland/Libraries/LibJS/Runtime/ProxyObject.cpp
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@ -188,7 +188,7 @@ ThrowCompletionOr<bool> ProxyObject::internal_is_extensible() const
}
// 10.5.4 [[PreventExtensions]] ( ), https://tc39.es/ecma262/#sec-proxy-object-internal-methods-and-internal-slots-preventextensions
bool ProxyObject::internal_prevent_extensions()
ThrowCompletionOr<bool> ProxyObject::internal_prevent_extensions()
{
auto& vm = this->vm();
auto& global_object = this->global_object();
@ -196,16 +196,14 @@ bool ProxyObject::internal_prevent_extensions()
// 1. Let handler be O.[[ProxyHandler]].
// 2. If handler is null, throw a TypeError exception.
if (m_is_revoked) {
vm.throw_exception<TypeError>(global_object, ErrorType::ProxyRevoked);
return {};
}
if (m_is_revoked)
return vm.throw_completion<TypeError>(global_object, ErrorType::ProxyRevoked);
// 3. Assert: Type(handler) is Object.
// 4. Let target be O.[[ProxyTarget]].
// 5. Let trap be ? GetMethod(handler, "preventExtensions").
auto trap = TRY_OR_DISCARD(Value(&m_handler).get_method(global_object, vm.names.preventExtensions));
auto trap = TRY(Value(&m_handler).get_method(global_object, vm.names.preventExtensions));
// 6. If trap is undefined, then
if (!trap) {
@ -214,20 +212,18 @@ bool ProxyObject::internal_prevent_extensions()
}
// 7. Let booleanTrapResult be ! ToBoolean(? Call(trap, handler, « target »)).
auto trap_result = TRY_OR_DISCARD(vm.call(*trap, &m_handler, &m_target)).to_boolean();
auto trap_result = TRY(vm.call(*trap, &m_handler, &m_target)).to_boolean();
// 8. If booleanTrapResult is true, then
if (trap_result) {
// a. Let extensibleTarget be ? IsExtensible(target).
auto extensible_target = m_target.is_extensible();
if (vm.exception())
return {};
if (auto* exception = vm.exception())
return throw_completion(exception->value());
// b. If extensibleTarget is true, throw a TypeError exception.
if (extensible_target) {
vm.throw_exception<TypeError>(global_object, ErrorType::ProxyPreventExtensionsReturn);
return {};
}
if (extensible_target)
return vm.throw_completion<TypeError>(global_object, ErrorType::ProxyPreventExtensionsReturn);
}
// 9. Return booleanTrapResult.