1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/*
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/IteratorOperations.h>
#include <LibJS/Runtime/WeakMap.h>
#include <LibJS/Runtime/WeakMapConstructor.h>
namespace JS {
WeakMapConstructor::WeakMapConstructor(GlobalObject& global_object)
: NativeFunction(vm().names.WeakMap.as_string(), *global_object.function_prototype())
{
}
void WeakMapConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
// 24.3.2.1 WeakMap.prototype, https://tc39.es/ecma262/#sec-weakmap.prototype
define_direct_property(vm.names.prototype, global_object.weak_map_prototype(), 0);
define_direct_property(vm.names.length, Value(0), Attribute::Configurable);
}
WeakMapConstructor::~WeakMapConstructor()
{
}
// 24.3.1.1 WeakMap ( [ iterable ] ), https://tc39.es/ecma262/#sec-weakmap-iterable
ThrowCompletionOr<Value> WeakMapConstructor::call()
{
auto& vm = this->vm();
return vm.throw_completion<TypeError>(global_object(), ErrorType::ConstructorWithoutNew, vm.names.WeakMap);
}
// 24.3.1.1 WeakMap ( [ iterable ] ), https://tc39.es/ecma262/#sec-weakmap-iterable
ThrowCompletionOr<Object*> WeakMapConstructor::construct(FunctionObject& new_target)
{
auto& vm = this->vm();
auto& global_object = this->global_object();
auto* weak_map = TRY(ordinary_create_from_constructor<WeakMap>(global_object, new_target, &GlobalObject::weak_map_prototype));
if (vm.argument(0).is_nullish())
return weak_map;
auto adder = TRY(weak_map->get(vm.names.set));
if (!adder.is_function())
return vm.throw_completion<TypeError>(global_object, ErrorType::NotAFunction, "'set' property of WeakMap");
TRY(get_iterator_values(global_object, vm.argument(0), [&](Value iterator_value) -> Optional<Completion> {
if (!iterator_value.is_object())
return vm.throw_completion<TypeError>(global_object, ErrorType::NotAnObject, String::formatted("Iterator value {}", iterator_value.to_string_without_side_effects()));
auto key = TRY(iterator_value.as_object().get(0));
auto value = TRY(iterator_value.as_object().get(1));
TRY(vm.call(adder.as_function(), Value(weak_map), key, value));
return {};
}));
return weak_map;
}
}
|
