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Atmosphere/libraries/libstratosphere/include/stratosphere/ddsf/ddsf_i_castable.hpp

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3.8 KiB
C++

/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <vapours.hpp>
#include <stratosphere/ddsf/ddsf_types.hpp>
#include <stratosphere/ddsf/impl/ddsf_type_tag.hpp>
namespace ams::ddsf {
#if defined(AMS_BUILD_FOR_DEBUGGING) || defined(AMS_BUILD_FOR_AUDITING)
#define AMS_DDSF_CASTABLE_TRAITS(__CLASS__, __BASE__) \
static_assert(std::convertible_to<__CLASS__ *, __BASE__ *>); \
public: \
static constexpr inline ::ams::ddsf::impl::TypeTag s_ams_ddsf_castable_type_tag{#__CLASS__, __BASE__::s_ams_ddsf_castable_type_tag}; \
constexpr virtual const ::ams::ddsf::impl::TypeTag &GetTypeTag() const override { return s_ams_ddsf_castable_type_tag; }
#else
#define AMS_DDSF_CASTABLE_TRAITS(__CLASS__, __BASE__) \
static_assert(std::convertible_to<__CLASS__ *, __BASE__ *>); \
public: \
static constexpr inline ::ams::ddsf::impl::TypeTag s_ams_ddsf_castable_type_tag{__BASE__::s_ams_ddsf_castable_type_tag}; \
constexpr virtual const ::ams::ddsf::impl::TypeTag &GetTypeTag() const override { return s_ams_ddsf_castable_type_tag; }
#endif
class ICastable {
private:
constexpr virtual const impl::TypeTag &GetTypeTag() const = 0;
template<typename T>
constexpr ALWAYS_INLINE void AssertCastableTo() const {
AMS_ASSERT(this->IsCastableTo<T>());
}
public:
template<typename T>
constexpr bool IsCastableTo() const {
return this->GetTypeTag().DerivesFrom(T::s_ams_ddsf_castable_type_tag);
}
template<typename T>
constexpr T &SafeCastTo() {
this->AssertCastableTo<T>();
return static_cast<T &>(*this);
}
template<typename T>
constexpr const T &SafeCastTo() const {
this->AssertCastableTo<T>();
return static_cast<const T &>(*this);
}
template<typename T>
constexpr T *SafeCastToPointer() {
this->AssertCastableTo<T>();
return static_cast<T *>(this);
}
template<typename T>
constexpr const T *SafeCastToPointer() const {
this->AssertCastableTo<T>();
return static_cast<const T *>(this);
}
#if defined(AMS_BUILD_FOR_AUDITING) || defined(AMS_BUILD_FOR_DEBUGGING)
constexpr const char *GetClassName() const {
return this->GetTypeTag().GetClassName();
}
#endif
};
}