7c8d35600c
...and don't let them leak out of their evaluation contexts. Also keep the exceptions separate from the actual values. This greatly reduces the number of assertions hit while entering random data into a sheet.
85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/Badge.h>
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#include <AK/Noncopyable.h>
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#include <AK/RefCounted.h>
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#include <AK/RefPtr.h>
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#include <LibJS/Forward.h>
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namespace JS {
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class HandleImpl : public RefCounted<HandleImpl> {
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AK_MAKE_NONCOPYABLE(HandleImpl);
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AK_MAKE_NONMOVABLE(HandleImpl);
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public:
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~HandleImpl();
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Cell* cell() { return m_cell; }
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const Cell* cell() const { return m_cell; }
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private:
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template<class T>
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friend class Handle;
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explicit HandleImpl(Cell*);
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Cell* m_cell { nullptr };
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};
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template<class T>
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class Handle {
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public:
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Handle() { }
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static Handle create(T* cell)
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{
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return Handle(adopt(*new HandleImpl(cell)));
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}
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T* cell() { return static_cast<T*>(m_impl->cell()); }
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const T* cell() const { return static_cast<const T*>(m_impl->cell()); }
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bool is_null() const { return m_impl.is_null(); }
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private:
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explicit Handle(NonnullRefPtr<HandleImpl> impl)
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: m_impl(move(impl))
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{
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}
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RefPtr<HandleImpl> m_impl;
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};
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template<class T>
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inline Handle<T> make_handle(T* cell)
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{
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return Handle<T>::create(cell);
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}
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}
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