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#pragma once
#include <util/generic/array_ref.h>
#include <util/generic/strbuf.h>
#include <util/generic/string.h>
#include <util/generic/vector.h>
#include <util/generic/serialized_enum.h>
#include <utility>
class IOutputStream;
namespace NEnumSerializationRuntime {
/// Stores all information about enumeration except its real type
template <typename TEnumRepresentationType>
class TEnumDescriptionBase {
public:
using TRepresentationType = TEnumRepresentationType;
struct TEnumStringPair {
const TRepresentationType Key;
const TStringBuf Name;
};
/// Refers initialization data stored in constexpr-friendly format
struct TInitializationData {
const TArrayRef<const TEnumStringPair> NamesInitializer;
const TArrayRef<const TEnumStringPair> ValuesInitializer;
const TArrayRef<const TStringBuf> CppNamesInitializer;
const TStringBuf CppNamesPrefix;
const TStringBuf ClassName;
};
public:
TEnumDescriptionBase(const TInitializationData& enumInitData);
~TEnumDescriptionBase();
const TString& ToString(TRepresentationType key) const;
std::pair<bool, TRepresentationType> TryFromString(const TStringBuf name) const;
TRepresentationType FromString(const TStringBuf name) const;
void Out(IOutputStream* os, const TRepresentationType key) const;
const TString& AllEnumNames() const noexcept {
return AllNames;
}
const TVector<TString>& AllEnumCppNames() const noexcept {
return AllCppNames;
}
const TMap<TRepresentationType, TString>& TypelessEnumNames() const noexcept {
return Names;
}
const TVector<TRepresentationType>& TypelessEnumValues() const noexcept {
return AllValues;
}
private:
TMap<TRepresentationType, TString> Names;
TMap<TString, TRepresentationType> Values;
TString AllNames;
TVector<TString> AllCppNames;
TString ClassName;
TVector<TRepresentationType> AllValues;
};
/// Wraps TEnumDescriptionBase and performs on-demand casts
template <typename EEnum, typename TEnumRepresentationType = typename NDetail::TSelectEnumRepresentationType<EEnum>::TType>
class TEnumDescription: public NDetail::TMappedViewBase<EEnum, TEnumRepresentationType>, private TEnumDescriptionBase<TEnumRepresentationType> {
public:
using TBase = TEnumDescriptionBase<TEnumRepresentationType>;
using TCast = NDetail::TMappedViewBase<EEnum, TEnumRepresentationType>;
using TBase::AllEnumCppNames;
using TBase::AllEnumNames;
using typename TBase::TEnumStringPair;
using typename TBase::TRepresentationType;
using typename TBase::TInitializationData;
public:
using TBase::TBase;
const TString& ToString(const EEnum key) const {
return TBase::ToString(TCast::CastToRepresentationType(key));
}
bool FromString(const TStringBuf name, EEnum& ret) const {
const auto findResult = TBase::TryFromString(name);
if (findResult.first) {
ret = TCast::CastFromRepresentationType(findResult.second);
return true;
}
return false;
}
EEnum FromString(const TStringBuf name) const {
return TCast::CastFromRepresentationType(TBase::FromString(name));
}
TMappedDictView<EEnum, TString> EnumNames() const noexcept {
return {TBase::TypelessEnumNames()};
}
TMappedArrayView<EEnum> AllEnumValues() const noexcept {
return {TBase::TypelessEnumValues()};
}
void Out(IOutputStream* os, const EEnum key) const {
TBase::Out(os, TCast::CastToRepresentationType(key));
}
static constexpr TEnumStringPair EnumStringPair(const EEnum key, const TStringBuf name) noexcept {
return {TCast::CastToRepresentationType(key), name};
}
};
}
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