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#pragma once
#include <util/generic/array_ref.h>
#include <util/generic/strbuf.h>
namespace NEnumSerializationRuntime {
enum class ESortOrder: int {
Unordered = 0,
Ascending = 1,
StrictlyAscending = 2,
DirectMapping = 3,
};
template <typename TEnumRepresentationType>
struct TEnumStringPair {
const TEnumRepresentationType Key;
const TStringBuf Name;
};
template <typename TEnumRepresentationType>
constexpr ESortOrder GetKeyFieldSortOrder(const TArrayRef<const TEnumStringPair<TEnumRepresentationType>> initializer) {
if (initializer.empty()) {
return ESortOrder::DirectMapping;
}
bool direct = true;
bool strict = true;
bool sorted = true;
TEnumRepresentationType expected = initializer.data()[0].Key;
for (size_t i = 1; i < initializer.size(); ++i) {
const auto& prev = initializer.data()[i - 1].Key;
const auto& next = initializer.data()[i - 0].Key;
if (++expected != next) {
direct = false;
}
if (prev >= next) {
strict = false;
}
if (prev > next) {
sorted = false;
break;
}
}
return direct ? ESortOrder::DirectMapping
: strict ? ESortOrder::StrictlyAscending
: sorted ? ESortOrder::Ascending
: ESortOrder::Unordered;
}
template <typename TEnumRepresentationType>
constexpr ESortOrder GetNameFieldSortOrder(const TArrayRef<const TEnumStringPair<TEnumRepresentationType>> initializer) {
if (initializer.empty()) {
return ESortOrder::DirectMapping;
}
bool strict = true;
bool sorted = true;
for (size_t i = 1; i < initializer.size(); ++i) {
const std::string_view prev = initializer.data()[i - 1].Name;
const std::string_view next = initializer.data()[i - 0].Name;
if (prev >= next) {
strict = false;
}
if (prev > next) {
sorted = false;
break;
}
}
return strict ? ESortOrder::StrictlyAscending
: sorted ? ESortOrder::Ascending
: ESortOrder::Unordered;
}
}
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