mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-14 22:31:29 +03:00
e6f907a155
Problem:
- Many constructors are defined as `{}` rather than using the ` =
default` compiler-provided constructor.
- Some types provide an implicit conversion operator from `nullptr_t`
instead of requiring the caller to default construct. This violates
the C++ Core Guidelines suggestion to declare single-argument
constructors explicit
(https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#c46-by-default-declare-single-argument-constructors-explicit).
Solution:
- Change default constructors to use the compiler-provided default
constructor.
- Remove implicit conversion operators from `nullptr_t` and change
usage to enforce type consistency without conversion.
99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, 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/Assertions.h>
|
|
#include <AK/StdLibExtras.h>
|
|
#include <AK/Types.h>
|
|
|
|
namespace AK {
|
|
|
|
// HACK: This is just here to make syntax highlighting work in Qt Creator.
|
|
// Once it supports C++20 concepts, we can remove this.
|
|
#if defined(__cpp_concepts) && !defined(__COVERITY__)
|
|
template<typename T>
|
|
concept PointerTypeName = IsPointer<T>::value;
|
|
template<PointerTypeName T>
|
|
#else
|
|
template<typename T, typename EnableIf<IsPointer<T>::value, int>::Type = 0>
|
|
#endif
|
|
|
|
class Userspace {
|
|
public:
|
|
Userspace() = default;
|
|
|
|
operator bool() const { return m_ptr; }
|
|
operator FlatPtr() const { return (FlatPtr)m_ptr; }
|
|
|
|
// Disable default implementations that would use surprising integer promotion.
|
|
bool operator==(const Userspace&) const = delete;
|
|
bool operator<=(const Userspace&) const = delete;
|
|
bool operator>=(const Userspace&) const = delete;
|
|
bool operator<(const Userspace&) const = delete;
|
|
bool operator>(const Userspace&) const = delete;
|
|
|
|
#ifdef KERNEL
|
|
Userspace(FlatPtr ptr)
|
|
: m_ptr(ptr)
|
|
{
|
|
}
|
|
|
|
FlatPtr ptr() const { return m_ptr; }
|
|
T unsafe_userspace_ptr() const { return (T)m_ptr; }
|
|
#else
|
|
Userspace(T ptr)
|
|
: m_ptr(ptr)
|
|
{
|
|
}
|
|
|
|
T ptr() const { return m_ptr; }
|
|
#endif
|
|
|
|
private:
|
|
#ifdef KERNEL
|
|
FlatPtr m_ptr { 0 };
|
|
#else
|
|
T m_ptr { nullptr };
|
|
#endif
|
|
};
|
|
|
|
template<typename T, typename U>
|
|
inline Userspace<T> static_ptr_cast(const Userspace<U>& ptr)
|
|
{
|
|
#ifdef KERNEL
|
|
auto casted_ptr = static_cast<T>(ptr.unsafe_userspace_ptr());
|
|
#else
|
|
auto casted_ptr = static_cast<T>(ptr.ptr());
|
|
#endif
|
|
return Userspace<T>((FlatPtr)casted_ptr);
|
|
}
|
|
|
|
}
|
|
|
|
using AK::static_ptr_cast;
|
|
using AK::Userspace;
|