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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Function.h>
#include <LibJS/Runtime/Completion.h>
#include <LibJS/Runtime/FunctionObject.h>
namespace JS {
class NativeFunction : public FunctionObject {
JS_OBJECT(NativeFunction, FunctionObject);
public:
static NativeFunction* create(GlobalObject&, const FlyString& name, Function<ThrowCompletionOr<Value>(VM&, GlobalObject&)>);
explicit NativeFunction(FlyString name, Function<ThrowCompletionOr<Value>(VM&, GlobalObject&)>, Object& prototype);
virtual void initialize(GlobalObject&) override { }
virtual ~NativeFunction() override;
virtual ThrowCompletionOr<Value> internal_call(Value this_argument, MarkedValueList arguments_list) override;
virtual ThrowCompletionOr<Object*> internal_construct(MarkedValueList 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<Object*> construct(FunctionObject& new_target);
virtual const FlyString& 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; }
protected:
NativeFunction(FlyString name, Object& prototype);
explicit NativeFunction(Object& prototype);
private:
virtual bool is_native_function() const final { return true; }
FlyString m_name;
Function<ThrowCompletionOr<Value>(VM&, GlobalObject&)> m_native_function;
Realm* m_realm { nullptr };
};
template<>
inline bool Object::fast_is<NativeFunction>() const { return is_native_function(); }
}
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