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#include "enum_runtime.h"
#include <util/generic/algorithm.h>
#include <util/generic/map.h>
#include <util/generic/yexception.h>
#include <util/stream/output.h>
namespace NEnumSerializationRuntime {
template <typename TEnumRepresentationType>
[[noreturn]] static void ThrowUndefinedValueException(const TEnumRepresentationType key, const TStringBuf className) {
throw yexception() << "Undefined value " << key << " in " << className << ". ";
}
template <typename TEnumRepresentationType>
const TString& TEnumDescriptionBase<TEnumRepresentationType>::ToString(TRepresentationType key) const {
const auto it = Names.find(key);
if (Y_LIKELY(it != Names.end())) {
return it->second;
}
ThrowUndefinedValueException(key, ClassName);
}
template <typename TEnumRepresentationType>
std::pair<bool, TEnumRepresentationType> TEnumDescriptionBase<TEnumRepresentationType>::TryFromString(const TStringBuf name) const {
const auto it = Values.find(name);
if (it != Values.end()) {
return {true, it->second};
}
return {false, TRepresentationType()};
}
template <class TContainer, class TNeedle, class TGetKey>
static typename TContainer::value_type const* FindPtrInSortedContainer(const TContainer& vec, const TNeedle& needle, TGetKey&& getKey) {
const auto it = LowerBoundBy(vec.begin(), vec.end(), needle, getKey);
if (it == vec.end()) {
return nullptr;
}
if (getKey(*it) != needle) {
return nullptr;
}
return std::addressof(*it);
}
template <typename TEnumRepresentationType>
std::pair<bool, TEnumRepresentationType> TEnumDescriptionBase<TEnumRepresentationType>::TryFromStringSorted(const TStringBuf name, const TInitializationData& enumInitData) {
const auto& vec = enumInitData.ValuesInitializer;
const auto* ptr = FindPtrInSortedContainer(vec, name, std::mem_fn(&TEnumStringPair::Name));
if (ptr) {
return {true, ptr->Key};
}
return {false, TRepresentationType()};
}
template <typename TEnumRepresentationType>
std::pair<bool, TEnumRepresentationType> TEnumDescriptionBase<TEnumRepresentationType>::TryFromStringFullScan(const TStringBuf name, const TInitializationData& enumInitData) {
const auto& vec = enumInitData.ValuesInitializer;
const auto* ptr = FindIfPtr(vec, [&](const auto& item) { return item.Name == name; });
if (ptr) {
return {true, ptr->Key};
}
return {false, TRepresentationType()};
}
[[noreturn]] static void ThrowUndefinedNameException(const TStringBuf name, const TStringBuf className, const TStringBuf allEnumNames) {
ythrow yexception() << "Key '" << name << "' not found in enum " << className << ". Valid options are: " << allEnumNames << ". ";
}
template <typename TEnumRepresentationType>
[[noreturn]] static void ThrowUndefinedNameException(const TStringBuf name, const typename TEnumDescriptionBase<TEnumRepresentationType>::TInitializationData& enumInitData) {
auto exc = __LOCATION__ + yexception() << "Key '" << name << "' not found in enum " << enumInitData.ClassName << ". Valid options are: ";
const auto& vec = enumInitData.NamesInitializer;
for (size_t i = 0; i < vec.size(); ++i) {
if (i != 0) {
exc << ", ";
}
exc << '\'' << vec[i].Name << '\'';
}
exc << ". ";
throw exc;
}
template <typename TEnumRepresentationType>
auto TEnumDescriptionBase<TEnumRepresentationType>::FromString(const TStringBuf name) const -> TRepresentationType {
const auto findResult = TryFromString(name);
if (Y_LIKELY(findResult.first)) {
return findResult.second;
}
ThrowUndefinedNameException(name, ClassName, AllEnumNames());
}
template <typename TEnumRepresentationType>
TEnumRepresentationType TEnumDescriptionBase<TEnumRepresentationType>::FromStringFullScan(const TStringBuf name, const TInitializationData& enumInitData) {
const auto findResult = TryFromStringFullScan(name, enumInitData);
if (Y_LIKELY(findResult.first)) {
return findResult.second;
}
ThrowUndefinedNameException<TEnumRepresentationType>(name, enumInitData);
}
template <typename TEnumRepresentationType>
TEnumRepresentationType TEnumDescriptionBase<TEnumRepresentationType>::FromStringSorted(const TStringBuf name, const TInitializationData& enumInitData) {
const auto findResult = TryFromStringSorted(name, enumInitData);
if (Y_LIKELY(findResult.first)) {
return findResult.second;
}
ThrowUndefinedNameException<TEnumRepresentationType>(name, enumInitData);
}
template <typename TEnumRepresentationType>
TStringBuf TEnumDescriptionBase<TEnumRepresentationType>::ToStringBuf(TRepresentationType key) const {
return this->ToString(key);
}
template <typename TEnumRepresentationType>
TStringBuf TEnumDescriptionBase<TEnumRepresentationType>::ToStringBufFullScan(const TRepresentationType key, const TInitializationData& enumInitData) {
const auto& vec = enumInitData.NamesInitializer;
const auto* ptr = FindIfPtr(vec, [&](const auto& item) { return item.Key == key; });
if (Y_UNLIKELY(!ptr)) {
ThrowUndefinedValueException(key, enumInitData.ClassName);
}
return ptr->Name;
}
template <typename TEnumRepresentationType>
TStringBuf TEnumDescriptionBase<TEnumRepresentationType>::ToStringBufSorted(const TRepresentationType key, const TInitializationData& enumInitData) {
const auto& vec = enumInitData.NamesInitializer;
const auto* ptr = FindPtrInSortedContainer(vec, key, std::mem_fn(&TEnumStringPair::Key));
if (Y_UNLIKELY(!ptr)) {
ThrowUndefinedValueException(key, enumInitData.ClassName);
}
return ptr->Name;
}
template <typename TEnumRepresentationType>
TStringBuf TEnumDescriptionBase<TEnumRepresentationType>::ToStringBufDirect(const TRepresentationType key, const TInitializationData& enumInitData) {
const auto& vec = enumInitData.NamesInitializer;
if (Y_UNLIKELY(vec.empty() || key < vec.front().Key)) {
ThrowUndefinedValueException(key, enumInitData.ClassName);
}
const size_t index = static_cast<size_t>(key - vec.front().Key);
if (Y_UNLIKELY(index >= vec.size())) {
ThrowUndefinedValueException(key, enumInitData.ClassName);
}
return vec[index].Name;
}
template <typename TEnumRepresentationType>
void TEnumDescriptionBase<TEnumRepresentationType>::Out(IOutputStream* os, const TRepresentationType key) const {
(*os) << this->ToStringBuf(key);
}
template <typename TEnumRepresentationType>
void TEnumDescriptionBase<TEnumRepresentationType>::OutFullScan(IOutputStream* os, const TRepresentationType key, const TInitializationData& enumInitData) {
(*os) << ToStringBufFullScan(key, enumInitData);
}
template <typename TEnumRepresentationType>
void TEnumDescriptionBase<TEnumRepresentationType>::OutSorted(IOutputStream* os, const TRepresentationType key, const TInitializationData& enumInitData) {
(*os) << ToStringBufSorted(key, enumInitData);
}
template <typename TEnumRepresentationType>
void TEnumDescriptionBase<TEnumRepresentationType>::OutDirect(IOutputStream* os, const TRepresentationType key, const TInitializationData& enumInitData) {
(*os) << ToStringBufDirect(key, enumInitData);
}
template <typename TEnumRepresentationType>
TEnumDescriptionBase<TEnumRepresentationType>::TEnumDescriptionBase(const TInitializationData& enumInitData)
: ClassName(enumInitData.ClassName)
{
const TArrayRef<const TEnumStringPair>& namesInitializer = enumInitData.NamesInitializer;
const TArrayRef<const TEnumStringPair>& valuesInitializer = enumInitData.ValuesInitializer;
const TArrayRef<const TStringBuf>& cppNamesInitializer = enumInitData.CppNamesInitializer;
TMap<TRepresentationType, TString> mapValueToName;
TMap<TStringBuf, TRepresentationType> mapNameToValue;
for (const TEnumStringPair& it : namesInitializer) {
mapValueToName.emplace(it.Key, TString(it.Name));
}
for (const TEnumStringPair& it : valuesInitializer) {
mapNameToValue.emplace(it.Name, it.Key);
}
Names = std::move(mapValueToName);
Values = std::move(mapNameToValue);
AllValues.reserve(Names.size());
for (const auto& it : Names) {
if (!AllNames.empty()) {
AllNames += ", ";
}
AllNames += TString::Join('\'', it.second, '\'');
AllValues.push_back(it.first);
}
AllCppNames.reserve(cppNamesInitializer.size());
for (const auto& cn : cppNamesInitializer) {
AllCppNames.push_back(TString::Join(enumInitData.CppNamesPrefix, cn));
}
}
template <typename TEnumRepresentationType>
TEnumDescriptionBase<TEnumRepresentationType>::~TEnumDescriptionBase() = default;
// explicit instantiation
template class TEnumDescriptionBase<int>;
template class TEnumDescriptionBase<unsigned>;
template class TEnumDescriptionBase<long long>;
template class TEnumDescriptionBase<unsigned long long>;
}
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