core/utils/AlignedData.h

#ifndef CORE_ALIGNED_DATA_H
#define CORE_ALIGNED_DATA_H

#define alignmentof(type) __alignof__(type)

#define ASSERT_ALIGNED_DATA(var, type)                                         \
    static_assert(sizeof(var) == sizeof(type), "aligned data size missmatch"); \
    static_assert(var.getSize() >= var.getAlignment(), "size >= alignment");   \
    static_assert(alignmentof(var) == alignmentof(type),                       \
                  "aligned data alignment missmatch");

namespace Core {
    template<int SIZE, int ALIGNMENT>
    class alignas(ALIGNMENT) AlignedData {
        static_assert(SIZE > 0, "size must be positive");
        char buffer[static_cast<unsigned int>(SIZE)] = {};

    public:
        template<typename T>
        T* as() {
            return reinterpret_cast<T*>(this);
        }

        template<typename T>
        const T* as() const {
            return reinterpret_cast<T*>(this);
        }

        static consteval int getSize() {
            return SIZE;
        }

        static consteval int getAlignment() {
            return ALIGNMENT;
        }
    };

    template<typename T>
    using AlignedType = AlignedData<sizeof(T), alignmentof(T)>;
}

#endif