LibJS: Make Value() default-construct the undefined value

The special empty value (that we use for array holes, Optional<Value>
when empty and a few other other placeholder/sentinel tasks) still
exists, but you now create one via JS::js_special_empty_value() and
check for it with Value::is_special_empty_value().

The main idea here is to make it very unlikely to accidentally create an
unexpected special empty value.
This commit is contained in:
Andreas Kling 2025-04-04 23:16:34 +02:00 committed by Andreas Kling
parent 0d91363742
commit 3cf50539ec
Notes: github-actions[bot] 2025-04-05 09:21:31 +00:00
43 changed files with 165 additions and 122 deletions

View file

@ -22,8 +22,8 @@ void report_exception_to_console(JS::Value value, JS::Realm& realm, ErrorInPromi
if (value.is_object()) {
auto& object = value.as_object();
auto& vm = object.vm();
auto name = object.get_without_side_effects(vm.names.name).value_or(JS::js_undefined());
auto message = object.get_without_side_effects(vm.names.message).value_or(JS::js_undefined());
auto name = object.get_without_side_effects(vm.names.name);
auto message = object.get_without_side_effects(vm.names.message);
if (name.is_accessor() || message.is_accessor()) {
// The result is not going to be useful, let's just print the value. This affects DOMExceptions, for example.
if (is<WebIDL::DOMException>(object)) {