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https://github.com/RGBCube/serenity
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2555d7a36a
None of these are ever null after the VM has been initialized, as proved by virtually every caller immediately dereferencing the raw pointer.
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*
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* Copyright (c) 2021, Idan Horowitz <idan.horowitz@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/AbstractOperations.h>
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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/IteratorOperations.h>
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#include <LibJS/Runtime/Map.h>
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#include <LibJS/Runtime/MapConstructor.h>
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namespace JS {
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MapConstructor::MapConstructor(Realm& realm)
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: NativeFunction(realm.vm().names.Map.as_string(), realm.intrinsics().function_prototype())
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{
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}
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ThrowCompletionOr<void> MapConstructor::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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// 24.1.2.1 Map.prototype, https://tc39.es/ecma262/#sec-map.prototype
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define_direct_property(vm.names.prototype, realm.intrinsics().map_prototype(), 0);
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define_native_accessor(realm, vm.well_known_symbol_species(), symbol_species_getter, {}, Attribute::Configurable);
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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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// 24.1.1.1 Map ( [ iterable ] ), https://tc39.es/ecma262/#sec-map-iterable
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ThrowCompletionOr<Value> MapConstructor::call()
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{
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auto& vm = this->vm();
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return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, vm.names.Map);
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}
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// 24.1.1.1 Map ( [ iterable ] ), https://tc39.es/ecma262/#sec-map-iterable
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ThrowCompletionOr<NonnullGCPtr<Object>> MapConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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auto map = TRY(ordinary_create_from_constructor<Map>(vm, new_target, &Intrinsics::map_prototype));
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if (vm.argument(0).is_nullish())
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return map;
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auto adder = TRY(map->get(vm.names.set));
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if (!adder.is_function())
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return vm.throw_completion<TypeError>(ErrorType::NotAFunction, "'set' property of Map");
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(void)TRY(get_iterator_values(vm, vm.argument(0), [&](Value iterator_value) -> Optional<Completion> {
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if (!iterator_value.is_object())
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return vm.throw_completion<TypeError>(ErrorType::NotAnObject, DeprecatedString::formatted("Iterator value {}", TRY_OR_THROW_OOM(vm, iterator_value.to_string_without_side_effects())));
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auto key = TRY(iterator_value.as_object().get(0));
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auto value = TRY(iterator_value.as_object().get(1));
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TRY(JS::call(vm, adder.as_function(), map, key, value));
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return {};
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}));
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return map;
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}
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// 24.1.2.2 get Map [ @@species ], https://tc39.es/ecma262/#sec-get-map-@@species
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JS_DEFINE_NATIVE_FUNCTION(MapConstructor::symbol_species_getter)
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{
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return vm.this_value();
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}
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}
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