5832de62fe
Both at the same time because many of them call construct() in call() and I'm not keen on adding a bunch of temporary plumbing to turn exceptions into throw completions. Also changes the return value of construct() to Object* instead of Value as it always needs to return an object; allowing an arbitrary Value is a massive foot gun.
53 lines
1.9 KiB
C++
53 lines
1.9 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Function.h>
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#include <LibJS/Runtime/Completion.h>
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#include <LibJS/Runtime/FunctionObject.h>
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namespace JS {
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class NativeFunction : public FunctionObject {
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JS_OBJECT(NativeFunction, FunctionObject);
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public:
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static NativeFunction* create(GlobalObject&, const FlyString& name, Function<ThrowCompletionOr<Value>(VM&, GlobalObject&)>);
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explicit NativeFunction(FlyString name, Function<ThrowCompletionOr<Value>(VM&, GlobalObject&)>, Object& prototype);
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virtual void initialize(GlobalObject&) override { }
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virtual ~NativeFunction() override;
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virtual ThrowCompletionOr<Value> internal_call(Value this_argument, MarkedValueList arguments_list) override;
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virtual ThrowCompletionOr<Object*> internal_construct(MarkedValueList arguments_list, FunctionObject& new_target) override;
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// Used for [[Call]] / [[Construct]]'s "...result of evaluating F in a manner that conforms to the specification of F".
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// Needs to be overridden by all NativeFunctions without an m_native_function.
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virtual ThrowCompletionOr<Value> call();
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virtual ThrowCompletionOr<Object*> construct(FunctionObject& new_target);
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virtual const FlyString& name() const override { return m_name; };
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virtual bool is_strict_mode() const override;
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virtual bool has_constructor() const override { return false; }
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virtual Realm* realm() const override { return m_realm; }
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protected:
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NativeFunction(FlyString name, Object& prototype);
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explicit NativeFunction(Object& prototype);
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private:
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virtual bool is_native_function() const final { return true; }
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FlyString m_name;
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Function<ThrowCompletionOr<Value>(VM&, GlobalObject&)> m_native_function;
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Realm* m_realm { nullptr };
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};
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template<>
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inline bool Object::fast_is<NativeFunction>() const { return is_native_function(); }
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}
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