mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-25 17:10:23 +00:00
68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
/*
|
|
* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in input and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of input 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/Platform.h>
|
|
#include <AK/StdLibExtras.h>
|
|
|
|
namespace AK {
|
|
|
|
template<typename OutputType, typename InputType>
|
|
ALWAYS_INLINE bool is(InputType& input)
|
|
{
|
|
if constexpr (requires { input.template fast_is<OutputType>(); }) {
|
|
return input.template fast_is<OutputType>();
|
|
}
|
|
return dynamic_cast<CopyConst<InputType, OutputType>*>(&input);
|
|
}
|
|
|
|
template<typename OutputType, typename InputType>
|
|
ALWAYS_INLINE bool is(InputType* input)
|
|
{
|
|
return input && is<OutputType>(*input);
|
|
}
|
|
|
|
template<typename OutputType, typename InputType>
|
|
ALWAYS_INLINE CopyConst<InputType, OutputType>* downcast(InputType* input)
|
|
{
|
|
static_assert(IsBaseOf<InputType, OutputType>::value);
|
|
ASSERT(!input || is<OutputType>(*input));
|
|
return static_cast<CopyConst<InputType, OutputType>*>(input);
|
|
}
|
|
|
|
template<typename OutputType, typename InputType>
|
|
ALWAYS_INLINE CopyConst<InputType, OutputType>& downcast(InputType& input)
|
|
{
|
|
static_assert(IsBaseOf<InputType, OutputType>::value);
|
|
ASSERT(is<OutputType>(input));
|
|
return static_cast<CopyConst<InputType, OutputType>&>(input);
|
|
}
|
|
|
|
}
|
|
|
|
using AK::downcast;
|
|
using AK::is;
|