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#ifndef ENUM_INL_H_
#error "Direct inclusion of this file is not allowed, include enum.h"
// For the sake of sane code completion.
#include "enum.h"
#endif
#include "format.h"
#include "string.h"
#include "string_builder.h"
#include <library/cpp/yt/exception/exception.h>
#include <util/string/printf.h>
#include <util/string/strip.h>
#include <span>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
namespace NDetail {
////////////////////////////////////////////////////////////////////////////////
using TEnumSuggestionsCalculator = std::string (*)(
TStringBuf value,
const std::span<const TStringBuf>& domainNames);
extern "C" TEnumSuggestionsCalculator TryGetEnumSuggestionsCalculator();
[[noreturn]]
void ThrowMalformedEnumValueException(
TStringBuf typeName,
TStringBuf value,
const std::span<const TStringBuf>& domainNames = {});
void FormatUnknownEnumValue(
auto* builder,
TStringBuf name,
auto value)
{
builder->AppendFormat("%v::unknown-%v", name, ToUnderlying(value));
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NDetail
////////////////////////////////////////////////////////////////////////////////
template <class T>
std::optional<T> TryParseEnum(TStringBuf str, bool enableUnknown)
{
auto tryParseToken = [&] (TStringBuf token) -> std::optional<T> {
if (auto optionalValue = TEnumTraits<T>::FindValueByLiteral(token)) {
return *optionalValue;
}
if (auto optionalDecodedValue = TryDecodeEnumValue(token)) {
if (auto optionalValue = TEnumTraits<T>::FindValueByLiteral(*optionalDecodedValue)) {
return *optionalValue;
}
}
if (enableUnknown) {
if constexpr (constexpr auto optionalUnknownValue = TEnumTraits<T>::TryGetUnknownValue()) {
return *optionalUnknownValue;
}
}
return std::nullopt;
};
if constexpr (TEnumTraits<T>::IsBitEnum) {
T result{};
TStringBuf token;
while (str.NextTok('|', token)) {
if (auto optionalValue = tryParseToken(StripString(token))) {
result |= *optionalValue;
} else {
return {};
}
}
return result;
} else {
return tryParseToken(str);
}
}
template <class T>
T ParseEnum(TStringBuf str)
{
if (auto optionalResult = TryParseEnum<T>(str, /*enableUnkown*/ true)) {
return *optionalResult;
}
std::span<const TStringBuf> domainNames;
if constexpr (requires { TEnumTraits<T>::GetDomainNames(); }) {
domainNames = TEnumTraits<T>::GetDomainNames();
}
NYT::NDetail::ThrowMalformedEnumValueException(TEnumTraits<T>::GetTypeName(), str, domainNames);
}
template <class T>
void FormatEnum(TStringBuilderBase* builder, T value, bool lowerCase)
{
auto formatLiteral = [&] (auto* builder, TStringBuf literal) {
if (lowerCase) {
CamelCaseToUnderscoreCase(builder, literal);
} else {
builder->AppendString(literal);
}
};
if constexpr (TEnumTraits<T>::IsBitEnum) {
if (None(value)) {
// Avoid empty string if possible.
if (auto optionalLiteral = TEnumTraits<T>::FindLiteralByValue(value)) {
formatLiteral(builder, *optionalLiteral);
}
return;
}
TDelimitedStringBuilderWrapper delimitedBuilder(builder, " | ");
T printedValue{};
for (auto currentValue : TEnumTraits<T>::GetDomainValues()) {
// Check if currentValue is viable and non-redunant.
if ((value & currentValue) == currentValue && (printedValue | currentValue) != printedValue) {
formatLiteral(&delimitedBuilder, *TEnumTraits<T>::FindLiteralByValue(currentValue));
printedValue |= currentValue;
}
}
// Handle the remainder.
if (printedValue != value) {
NYT::NDetail::FormatUnknownEnumValue(&delimitedBuilder, TEnumTraits<T>::GetTypeName(), value & ~printedValue);
}
} else {
if (auto optionalLiteral = TEnumTraits<T>::FindLiteralByValue(value)) {
formatLiteral(builder, *optionalLiteral);
return;
}
NYT::NDetail::FormatUnknownEnumValue(builder, TEnumTraits<T>::GetTypeName(), value);
}
}
template <class T>
std::string FormatEnum(T value)
{
TStringBuilder builder;
FormatEnum(&builder, value, /*lowerCase*/ true);
return builder.Flush();
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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