beenull/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-09-30 00:31:14 +00:00
Code Issues Actions 5 Packages Projects Releases Wiki Activity

LibJS: Add spec comments to WeakSetPrototype

Browse source
This commit is contained in:
Linus Groh 2023-04-12 23:16:07 +02:00
parent bccffed7e9
commit ed9e2366da
Notes: sideshowbarker 2024-07-17 07:20:57 +09:00 
Author: https://github.com/linusg
Commit: https://github.com/SerenityOS/serenity/commit/ed9e2366da
Pull-request: https://github.com/SerenityOS/serenity/pull/18336
Reviewed-by: https://github.com/trflynn89 ✅
1 changed files with 40 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

44
Userland/Libraries/LibJS/Runtime/WeakSetPrototype.cpp
View file

@ -35,33 +35,69 @@ ThrowCompletionOr<void> WeakSetPrototype::initialize(Realm& realm)
// 24.4.3.1 WeakSet.prototype.add ( value ), https://tc39.es/ecma262/#sec-weakset.prototype.add
JS_DEFINE_NATIVE_FUNCTION(WeakSetPrototype::add)
{
auto* weak_set = TRY(typed_this_object(vm));
auto value = vm.argument(0);
// 1. Let S be the this value.
// 2. Perform ? RequireInternalSlot(S, [[WeakSetData]]).
auto* weak_set = TRY(typed_this_object(vm));
// 3. If CanBeHeldWeakly(value) is false, throw a TypeError exception.
if (!can_be_held_weakly(value))
return vm.throw_completion<TypeError>(ErrorType::CannotBeHeldWeakly, TRY_OR_THROW_OOM(vm, value.to_string_without_side_effects()));
// 4. For each element e of S.[[WeakSetData]], do
// a. If e is not empty and SameValue(e, value) is true, then
// i. Return S.
// 5. Append value to S.[[WeakSetData]].
weak_set->values().set(&value.as_cell(), AK::HashSetExistingEntryBehavior::Keep);
// 6. Return S.
return weak_set;
}
// 24.4.3.3 WeakSet.prototype.delete ( value ), https://tc39.es/ecma262/#sec-weakset.prototype.delete
JS_DEFINE_NATIVE_FUNCTION(WeakSetPrototype::delete_)
{
auto* weak_set = TRY(typed_this_object(vm));
auto value = vm.argument(0);
// 1. Let S be the this value.
// 2. Perform ? RequireInternalSlot(S, [[WeakSetData]]).
auto* weak_set = TRY(typed_this_object(vm));
// 3. If CanBeHeldWeakly(value) is false, return false.
if (!can_be_held_weakly(value))
return Value(false);
// 4. For each element e of S.[[WeakSetData]], do
// a. If e is not empty and SameValue(e, value) is true, then
// i. Replace the element of S.[[WeakSetData]] whose value is e with an element whose value is empty.
// ii. Return true.
// 5. Return false.
return Value(weak_set->values().remove(&value.as_cell()));
}
// 24.4.3.4 WeakSet.prototype.has ( value ), https://tc39.es/ecma262/#sec-weakset.prototype.has
JS_DEFINE_NATIVE_FUNCTION(WeakSetPrototype::has)
{
auto* weak_set = TRY(typed_this_object(vm));
auto value = vm.argument(0);
// 1. Let S be the this value.
// 2. Perform ? RequireInternalSlot(S, [[WeakSetData]]).
auto* weak_set = TRY(typed_this_object(vm));
// 3. If CanBeHeldWeakly(value) is false, return false.
if (!can_be_held_weakly(value))
return Value(false);
// 4. For each element e of S.[[WeakSetData]], do
// a. If e is not empty and SameValue(e, value) is true, return true.
auto& values = weak_set->values();
return Value(values.find(&value.as_cell()) != values.end());
auto result = values.find(&value.as_cell());
if (result != values.end())
return Value(true);
// 5. Return false.
return Value(false);
}
}