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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/Format.h>
#include <AK/Forward.h>
#include <AK/Noncopyable.h>
#include <AK/String.h>
#include <AK/TypeCasts.h>
#include <LibJS/Forward.h>
namespace JS {
class Cell {
AK_MAKE_NONCOPYABLE(Cell);
AK_MAKE_NONMOVABLE(Cell);
public:
virtual void initialize(GlobalObject&) { }
virtual ~Cell() { }
bool is_marked() const { return m_mark; }
void set_marked(bool b) { m_mark = b; }
bool is_live() const { return m_live; }
void set_live(bool b) { m_live = b; }
virtual const char* class_name() const = 0;
class Visitor {
public:
void visit(Cell*);
void visit(Value);
protected:
virtual void visit_impl(Cell*) = 0;
};
virtual void visit_edges(Visitor&) { }
Heap& heap() const;
VM& vm() const;
protected:
Cell() { }
private:
bool m_mark { false };
bool m_live { true };
};
}
template<>
struct AK::Formatter<JS::Cell> : AK::Formatter<FormatString> {
void format(FormatBuilder& builder, const JS::Cell* cell)
{
if (!cell)
Formatter<FormatString>::format(builder, "Cell{nullptr}");
else
Formatter<FormatString>::format(builder, "{}({})", cell->class_name(), cell);
}
};
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