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LibJS: Convert create_mutable_binding() to ThrowCompletionOr

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Also add spec step comments to it while we're here.
This commit is contained in:
Linus Groh 2021-10-09 18:53:25 +01:00
parent fbb176c926
commit 4baf3a91e8
10 changed files with 43 additions and 39 deletions
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10
Userland/Libraries/LibJS/Runtime/DeclarativeEnvironment.cpp
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@ -46,8 +46,9 @@ ThrowCompletionOr<bool> DeclarativeEnvironment::has_binding(FlyString const& nam
}
// 9.1.1.1.2 CreateMutableBinding ( N, D ), https://tc39.es/ecma262/#sec-declarative-environment-records-createmutablebinding-n-d
void DeclarativeEnvironment::create_mutable_binding(GlobalObject&, FlyString const& name, bool can_be_deleted)
ThrowCompletionOr<void> DeclarativeEnvironment::create_mutable_binding(GlobalObject&, FlyString const& name, bool can_be_deleted)
{
// 2. Create a mutable binding in envRec for N and record that it is uninitialized. If D is true, record that the newly created binding may be deleted by a subsequent DeleteBinding call.
m_bindings.append(Binding {
.value = {},
.strict = false,
@ -56,7 +57,12 @@ void DeclarativeEnvironment::create_mutable_binding(GlobalObject&, FlyString con
.initialized = false,
});
auto result = m_names.set(name, m_bindings.size() - 1);
// 1. Assert: envRec does not already have a binding for N.
VERIFY(result == AK::HashSetResult::InsertedNewEntry);
// 3. Return NormalCompletion(empty).
return {};
}
// 9.1.1.1.3 CreateImmutableBinding ( N, S ), https://tc39.es/ecma262/#sec-declarative-environment-records-createimmutablebinding-n-s
@ -93,7 +99,7 @@ void DeclarativeEnvironment::set_mutable_binding(GlobalObject& global_object, Fl
global_object.vm().throw_exception<ReferenceError>(global_object, ErrorType::UnknownIdentifier, name);
return;
}
create_mutable_binding(global_object, name, true);
(void)create_mutable_binding(global_object, name, true);
initialize_binding(global_object, name, value);
return;
}