is_read_and_writable.h

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#pragma once
#include "fisch/vx/container_cast.h"
#include "fisch/vx/traits.h"
#include "haldls/vx/traits.h"
#include "hate/type_list.h"
#include <array>
#include <type_traits>
 
namespace haldls::vx::detail {
 
template <typename TL>
struct gen_is_read_and_writeable_lookup_table;
 
template <typename... Ts>
struct gen_is_read_and_writeable_lookup_table<hate::type_list<Ts...>>
{
    constexpr static std::array<bool, sizeof...(Ts)> value = {
        (fisch::vx::IsReadable<decltype(fisch::vx::container_cast(std::declval<Ts>()))>::value &&
         fisch::vx::IsWritable<decltype(fisch::vx::container_cast(std::declval<Ts>()))>::value)...};
};
 
constexpr bool is_read_and_writeable(Backend const b)
{
    constexpr auto lookup_table =
        gen_is_read_and_writeable_lookup_table<BackendContainerList>::value;
    return lookup_table[static_cast<size_t>(b)];
}
 
} // namespace haldls::vx::detail