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LibJS: Add most of the Map.prototype methods

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Specifically all aside from "keys", "values" and "entries" which
require an implementation of the MapIterator object.
This commit is contained in:
Idan Horowitz 2021-06-12 23:57:01 +03:00 • committed by Linus Groh
parent a96ac8bd56
commit 6c0d5163a1
8 changed files with 212 additions and 0 deletions
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81
Userland/Libraries/LibJS/Runtime/MapPrototype.cpp
View file

@ -18,6 +18,14 @@ void MapPrototype::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
Object::initialize(global_object);
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(vm.names.clear, clear, 0, attr);
define_native_function(vm.names.delete_, delete_, 1, attr);
define_native_function(vm.names.forEach, for_each, 1, attr);
define_native_function(vm.names.get, get, 1, attr);
define_native_function(vm.names.has, has, 1, attr);
define_native_function(vm.names.set, set, 2, attr);
define_native_accessor(vm.names.size, size_getter, {}, Attribute::Configurable);
@ -40,6 +48,79 @@ Map* MapPrototype::typed_this(VM& vm, GlobalObject& global_object)
return static_cast<Map*>(this_object);
}
// 24.1.3.1 Map.prototype.clear ( ), https://tc39.es/ecma262/#sec-map.prototype.clear
JS_DEFINE_NATIVE_FUNCTION(MapPrototype::clear)
{
auto* map = typed_this(vm, global_object);
if (!map)
return {};
map->entries().clear();
return js_undefined();
}
// 24.1.3.3 Map.prototype.delete ( key ), https://tc39.es/ecma262/#sec-map.prototype.delete
JS_DEFINE_NATIVE_FUNCTION(MapPrototype::delete_)
{
auto* map = typed_this(vm, global_object);
if (!map)
return {};
return Value(map->entries().remove(vm.argument(0)));
}
// 24.1.3.5 Map.prototype.forEach ( callbackfn [ , thisArg ] ), https://tc39.es/ecma262/#sec-map.prototype.foreach
JS_DEFINE_NATIVE_FUNCTION(MapPrototype::for_each)
{
auto* map = typed_this(vm, global_object);
if (!map)
return {};
if (!vm.argument(0).is_function()) {
vm.throw_exception<TypeError>(global_object, ErrorType::NotAFunction, vm.argument(0).to_string_without_side_effects());
return {};
}
auto this_value = vm.this_value(global_object);
for (auto& entry : map->entries()) {
(void)vm.call(vm.argument(0).as_function(), vm.argument(1), entry.value, entry.key, this_value);
if (vm.exception())
return {};
}
return js_undefined();
}
// 24.1.3.6 Map.prototype.get ( key ), https://tc39.es/ecma262/#sec-map.prototype.get
JS_DEFINE_NATIVE_FUNCTION(MapPrototype::get)
{
auto* map = typed_this(vm, global_object);
if (!map)
return {};
auto result = map->entries().get(vm.argument(0));
if (!result.has_value())
return js_undefined();
return result.value();
}
// 24.1.3.7 Map.prototype.has ( key ), https://tc39.es/ecma262/#sec-map.prototype.has
JS_DEFINE_NATIVE_FUNCTION(MapPrototype::has)
{
auto* map = typed_this(vm, global_object);
if (!map)
return {};
auto& entries = map->entries();
return Value(entries.find(vm.argument(0)) != entries.end());
}
// 24.1.3.9 Map.prototype.set ( key, value ), https://tc39.es/ecma262/#sec-map.prototype.set
JS_DEFINE_NATIVE_FUNCTION(MapPrototype::set)
{
auto* map = typed_this(vm, global_object);
if (!map)
return {};
auto key = vm.argument(0);
if (key.is_negative_zero())
key = Value(0);
map->entries().set(key, vm.argument(1));
return map;
}
// 24.1.3.10 get Map.prototype.size, https://tc39.es/ecma262/#sec-get-map.prototype.size
JS_DEFINE_NATIVE_GETTER(MapPrototype::size_getter)
{

7
Userland/Libraries/LibJS/Runtime/MapPrototype.h
View file

@ -21,6 +21,13 @@ public:
private:
static Map* typed_this(VM&, GlobalObject&);
JS_DECLARE_NATIVE_FUNCTION(clear);
JS_DECLARE_NATIVE_FUNCTION(delete_);
JS_DECLARE_NATIVE_FUNCTION(for_each);
JS_DECLARE_NATIVE_FUNCTION(get);
JS_DECLARE_NATIVE_FUNCTION(has);
JS_DECLARE_NATIVE_FUNCTION(set);
JS_DECLARE_NATIVE_GETTER(size_getter);
};