mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-10 13:00:29 +03:00
216e21a1fa
This isn't a complete conversion to ErrorOr<void>, but a good chunk. The end goal here is to propagate buffer allocation failures to the caller, and allow the use of TRY() with formatting functions.
86 lines
1.7 KiB
C++
86 lines
1.7 KiB
C++
/*
|
|
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Format.h>
|
|
#include <AK/Forward.h>
|
|
#include <AK/Noncopyable.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; }
|
|
|
|
#ifdef JS_TRACK_ZOMBIE_CELLS
|
|
virtual void did_become_zombie()
|
|
{
|
|
}
|
|
#endif
|
|
|
|
enum class State {
|
|
Live,
|
|
Dead,
|
|
#ifdef JS_TRACK_ZOMBIE_CELLS
|
|
Zombie,
|
|
#endif
|
|
};
|
|
|
|
State state() const { return m_state; }
|
|
void set_state(State state) { m_state = state; }
|
|
|
|
virtual const char* class_name() const = 0;
|
|
|
|
class Visitor {
|
|
public:
|
|
void visit(Cell* cell)
|
|
{
|
|
if (cell)
|
|
visit_impl(*cell);
|
|
}
|
|
void visit(Value);
|
|
|
|
protected:
|
|
virtual void visit_impl(Cell&) = 0;
|
|
virtual ~Visitor() = default;
|
|
};
|
|
|
|
virtual bool is_environment() const { return false; }
|
|
virtual void visit_edges(Visitor&) { }
|
|
|
|
Heap& heap() const;
|
|
VM& vm() const;
|
|
|
|
protected:
|
|
Cell() { }
|
|
|
|
private:
|
|
bool m_mark : 1 { false };
|
|
State m_state : 7 { State::Live };
|
|
};
|
|
|
|
}
|
|
|
|
template<>
|
|
struct AK::Formatter<JS::Cell> : AK::Formatter<FormatString> {
|
|
ErrorOr<void> format(FormatBuilder& builder, JS::Cell const* cell)
|
|
{
|
|
if (!cell)
|
|
return Formatter<FormatString>::format(builder, "Cell{nullptr}");
|
|
else
|
|
return Formatter<FormatString>::format(builder, "{}({})", cell->class_name(), cell);
|
|
}
|
|
};
|