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- /*
- * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
- * Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #pragma once
- #include <AK/Badge.h>
- #include <AK/Optional.h>
- #include <LibJS/Runtime/Completion.h>
- #include <LibJS/Runtime/FunctionObject.h>
- #include <LibJS/Runtime/PropertyKey.h>
- #include <LibJS/SafeFunction.h>
- namespace JS {
- class NativeFunction : public FunctionObject {
- JS_OBJECT(NativeFunction, FunctionObject);
- public:
- static NonnullGCPtr<NativeFunction> create(Realm&, SafeFunction<ThrowCompletionOr<Value>(VM&)> behaviour, i32 length, PropertyKey const& name, Optional<Realm*> = {}, Optional<Object*> prototype = {}, Optional<StringView> const& prefix = {});
- static NonnullGCPtr<NativeFunction> create(Realm&, FlyString const& name, SafeFunction<ThrowCompletionOr<Value>(VM&)>);
- virtual void initialize(Realm&) override { }
- virtual ~NativeFunction() override = default;
- virtual ThrowCompletionOr<Value> internal_call(Value this_argument, MarkedVector<Value> arguments_list) override;
- virtual ThrowCompletionOr<NonnullGCPtr<Object>> internal_construct(MarkedVector<Value> arguments_list, FunctionObject& new_target) override;
- // Used for [[Call]] / [[Construct]]'s "...result of evaluating F in a manner that conforms to the specification of F".
- // Needs to be overridden by all NativeFunctions without an m_native_function.
- virtual ThrowCompletionOr<Value> call();
- virtual ThrowCompletionOr<NonnullGCPtr<Object>> construct(FunctionObject& new_target);
- virtual FlyString const& name() const override { return m_name; };
- virtual bool is_strict_mode() const override;
- virtual bool has_constructor() const override { return false; }
- virtual Realm* realm() const override { return m_realm; }
- Optional<FlyString> const& initial_name() const { return m_initial_name; }
- void set_initial_name(Badge<FunctionObject>, FlyString initial_name) { m_initial_name = move(initial_name); }
- protected:
- NativeFunction(FlyString name, Object& prototype);
- NativeFunction(SafeFunction<ThrowCompletionOr<Value>(VM&)>, Object* prototype, Realm& realm);
- NativeFunction(FlyString name, SafeFunction<ThrowCompletionOr<Value>(VM&)>, Object& prototype);
- explicit NativeFunction(Object& prototype);
- private:
- virtual bool is_native_function() const final { return true; }
- FlyString m_name;
- Optional<FlyString> m_initial_name; // [[InitialName]]
- SafeFunction<ThrowCompletionOr<Value>(VM&)> m_native_function;
- Realm* m_realm { nullptr };
- };
- template<>
- inline bool Object::fast_is<NativeFunction>() const { return is_native_function(); }
- }
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