mirror of
https://github.com/LadybirdBrowser/ladybird.git
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2692db8699
Note that as of this commit, there aren't any such throwers, and the call site in Heap::allocate will drop exceptions on the floor. This commit only serves to change the declaration of the overrides, make sure they return an empty value, and to propagate OOM errors frm their base initialize invocations.
96 lines
3.3 KiB
C++
96 lines
3.3 KiB
C++
/*
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* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
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* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/SymbolConstructor.h>
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namespace JS {
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SymbolConstructor::SymbolConstructor(Realm& realm)
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: NativeFunction(realm.vm().names.Symbol.as_string(), *realm.intrinsics().function_prototype())
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{
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}
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ThrowCompletionOr<void> SymbolConstructor::initialize(Realm& realm)
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{
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auto& vm = this->vm();
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MUST_OR_THROW_OOM(NativeFunction::initialize(realm));
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// 20.4.2.9 Symbol.prototype, https://tc39.es/ecma262/#sec-symbol.prototype
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define_direct_property(vm.names.prototype, realm.intrinsics().symbol_prototype(), 0);
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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(realm, vm.names.for_, for_, 1, attr);
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define_native_function(realm, vm.names.keyFor, key_for, 1, attr);
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#define __JS_ENUMERATE(SymbolName, snake_name) \
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define_direct_property(vm.names.SymbolName, vm.well_known_symbol_##snake_name(), 0);
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JS_ENUMERATE_WELL_KNOWN_SYMBOLS
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#undef __JS_ENUMERATE
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define_direct_property(vm.names.length, Value(0), Attribute::Configurable);
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return {};
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}
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// 20.4.1.1 Symbol ( [ description ] ), https://tc39.es/ecma262/#sec-symbol-description
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ThrowCompletionOr<Value> SymbolConstructor::call()
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{
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auto& vm = this->vm();
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if (vm.argument(0).is_undefined())
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return Symbol::create(vm, {}, false);
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return Symbol::create(vm, TRY(vm.argument(0).to_deprecated_string(vm)), false);
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}
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// 20.4.1.1 Symbol ( [ description ] ), https://tc39.es/ecma262/#sec-symbol-description
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ThrowCompletionOr<NonnullGCPtr<Object>> SymbolConstructor::construct(FunctionObject&)
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{
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return vm().throw_completion<TypeError>(ErrorType::NotAConstructor, "Symbol");
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}
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// 20.4.2.2 Symbol.for ( key ), https://tc39.es/ecma262/#sec-symbol.for
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JS_DEFINE_NATIVE_FUNCTION(SymbolConstructor::for_)
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{
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// 1. Let stringKey be ? ToString(key).
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auto string_key = TRY(vm.argument(0).to_deprecated_string(vm));
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// 2. For each element e of the GlobalSymbolRegistry List, do
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auto result = vm.global_symbol_registry().get(string_key);
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if (result.has_value()) {
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// a. If SameValue(e.[[Key]], stringKey) is true, return e.[[Symbol]].
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return result.value();
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}
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// 3. Assert: GlobalSymbolRegistry does not currently contain an entry for stringKey.
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VERIFY(!result.has_value());
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// 4. Let newSymbol be a new unique Symbol value whose [[Description]] value is stringKey.
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auto new_symbol = Symbol::create(vm, string_key, true);
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// 5. Append the Record { [[Key]]: stringKey, [[Symbol]]: newSymbol } to the GlobalSymbolRegistry List.
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vm.global_symbol_registry().set(string_key, new_symbol);
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// 6. Return newSymbol.
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return new_symbol;
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}
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// 20.4.2.6 Symbol.keyFor ( sym ), https://tc39.es/ecma262/#sec-symbol.keyfor
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JS_DEFINE_NATIVE_FUNCTION(SymbolConstructor::key_for)
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{
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auto argument = vm.argument(0);
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if (!argument.is_symbol())
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return vm.throw_completion<TypeError>(ErrorType::NotASymbol, argument.to_string_without_side_effects());
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auto& symbol = argument.as_symbol();
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if (symbol.is_global())
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return PrimitiveString::create(vm, symbol.description());
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return js_undefined();
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}
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}
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