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#pragma once
#include <util/generic/cast.h>
#include <util/generic/serialized_enum.h>
#include <optional>
#include <type_traits>
#include <typeinfo>
namespace NPrivate {
[[noreturn]] void OnSafeCastToEnumUnexpectedValue(const std::type_info& valueTypeInfo);
} // namespace NPrivate
/**
* Safely cast an integer value to the enum value.
* @throw yexception is case of unknown enum underlying type value
*
* @tparam TEnum enum type
*/
template <typename TEnum, typename TInteger, typename = std::enable_if_t<std::is_enum_v<TEnum>>>
TEnum SafeCastToEnum(TInteger integerValue) {
using TUnderlyingEnumType = std::underlying_type_t<TEnum>;
std::optional<TUnderlyingEnumType> value;
try {
value = SafeIntegerCast<TUnderlyingEnumType>(integerValue);
} catch (const TBadCastException&) {
// SafeIntegerCast throws TBadCastException when TInteger cannot be cast
// to TUnderlyingEnumType but the exception message is about integer
// value cast being unsafe.
// SafeCastToEnum must throw TBadCastException with its own exception
// message even if integer cast fails.
}
if (value.has_value()) {
for (TEnum enumValue : GetEnumAllValues<TEnum>()) {
if (static_cast<TUnderlyingEnumType>(enumValue) == *value) {
return enumValue;
}
}
}
NPrivate::OnSafeCastToEnumUnexpectedValue(typeid(TEnum));
}
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