mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-10-16 13:09:41 +00:00
0efa98a57a
This has quite a lot of fall out. But the majority of it is just type or UDL substitution, where the changes just fall through to other function calls. By changing property key storage to UTF-16, the main affected areas are: * NativeFunction names must now be UTF-16 * Bytecode identifiers must now be UTF-16 * Module/binding names must now be UTF-16
106 lines
3.7 KiB
C++
106 lines
3.7 KiB
C++
/*
|
|
* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
|
|
* Copyright (c) 2022-2023, Linus Groh <linusg@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibJS/Runtime/Error.h>
|
|
#include <LibJS/Runtime/GlobalObject.h>
|
|
#include <LibJS/Runtime/SymbolConstructor.h>
|
|
|
|
namespace JS {
|
|
|
|
GC_DEFINE_ALLOCATOR(SymbolConstructor);
|
|
|
|
SymbolConstructor::SymbolConstructor(Realm& realm)
|
|
: NativeFunction(realm.vm().names.Symbol.as_string(), realm.intrinsics().function_prototype())
|
|
{
|
|
}
|
|
|
|
void SymbolConstructor::initialize(Realm& realm)
|
|
{
|
|
auto& vm = this->vm();
|
|
Base::initialize(realm);
|
|
|
|
// 20.4.2.9 Symbol.prototype, https://tc39.es/ecma262/#sec-symbol.prototype
|
|
define_direct_property(vm.names.prototype, realm.intrinsics().symbol_prototype(), 0);
|
|
|
|
u8 attr = Attribute::Writable | Attribute::Configurable;
|
|
define_native_function(realm, vm.names.for_, for_, 1, attr);
|
|
define_native_function(realm, vm.names.keyFor, key_for, 1, attr);
|
|
|
|
#define __JS_ENUMERATE(SymbolName, snake_name) \
|
|
define_direct_property(vm.names.SymbolName, vm.well_known_symbol_##snake_name(), 0);
|
|
JS_ENUMERATE_WELL_KNOWN_SYMBOLS
|
|
#undef __JS_ENUMERATE
|
|
|
|
define_direct_property(vm.names.length, Value(0), Attribute::Configurable);
|
|
}
|
|
|
|
// 20.4.1.1 Symbol ( [ description ] ), https://tc39.es/ecma262/#sec-symbol-description
|
|
ThrowCompletionOr<Value> SymbolConstructor::call()
|
|
{
|
|
auto& vm = this->vm();
|
|
auto description = vm.argument(0);
|
|
|
|
// 2. If description is undefined, let descString be undefined.
|
|
// 3. Else, let descString be ? ToString(description).
|
|
auto description_string = description.is_undefined()
|
|
? Optional<Utf16String> {}
|
|
: TRY(description.to_utf16_string(vm));
|
|
|
|
// 4. Return a new Symbol whose [[Description]] is descString.
|
|
return Symbol::create(vm, move(description_string), false);
|
|
}
|
|
|
|
// 20.4.1.1 Symbol ( [ description ] ), https://tc39.es/ecma262/#sec-symbol-description
|
|
ThrowCompletionOr<GC::Ref<Object>> SymbolConstructor::construct(FunctionObject&)
|
|
{
|
|
// 1. If NewTarget is not undefined, throw a TypeError exception.
|
|
return vm().throw_completion<TypeError>(ErrorType::NotAConstructor, "Symbol");
|
|
}
|
|
|
|
// 20.4.2.2 Symbol.for ( key ), https://tc39.es/ecma262/#sec-symbol.for
|
|
JS_DEFINE_NATIVE_FUNCTION(SymbolConstructor::for_)
|
|
{
|
|
// 1. Let stringKey be ? ToString(key).
|
|
auto string_key = TRY(vm.argument(0).to_utf16_string(vm));
|
|
|
|
// 2. For each element e of the GlobalSymbolRegistry List, do
|
|
auto result = vm.global_symbol_registry().get(string_key);
|
|
if (result.has_value()) {
|
|
// a. If SameValue(e.[[Key]], stringKey) is true, return e.[[Symbol]].
|
|
return result.value();
|
|
}
|
|
|
|
// 3. Assert: GlobalSymbolRegistry does not currently contain an entry for stringKey.
|
|
VERIFY(!result.has_value());
|
|
|
|
// 4. Let newSymbol be a new unique Symbol value whose [[Description]] value is stringKey.
|
|
auto new_symbol = Symbol::create(vm, string_key, true);
|
|
|
|
// 5. Append the Record { [[Key]]: stringKey, [[Symbol]]: newSymbol } to the GlobalSymbolRegistry List.
|
|
vm.global_symbol_registry().set(string_key, new_symbol);
|
|
|
|
// 6. Return newSymbol.
|
|
return new_symbol;
|
|
}
|
|
|
|
// 20.4.2.6 Symbol.keyFor ( sym ), https://tc39.es/ecma262/#sec-symbol.keyfor
|
|
JS_DEFINE_NATIVE_FUNCTION(SymbolConstructor::key_for)
|
|
{
|
|
auto argument = vm.argument(0);
|
|
|
|
// 1. If sym is not a Symbol, throw a TypeError exception.
|
|
if (!argument.is_symbol())
|
|
return vm.throw_completion<TypeError>(ErrorType::NotASymbol, argument.to_string_without_side_effects());
|
|
|
|
// 2. Return KeyForSymbol(sym).
|
|
auto key = argument.as_symbol().key();
|
|
return key.has_value()
|
|
? PrimitiveString::create(vm, key.release_value())
|
|
: js_undefined();
|
|
}
|
|
|
|
}
|