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#ifndef COMPARE_INL_H_
#error "Direct inclusion of this file is not allowed, include compare.h"
// For the sake of sane code completion.
#include "compare.h"
#endif
#include "numeric_helpers.h"
#include <util/generic/string.h>
#include <string>
#include <string_view>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
template <class T>
Y_FORCE_INLINE int TernaryCompare(const T& lhs, const T& rhs)
{
if (lhs == rhs) {
return 0;
} else if (lhs < rhs) {
return -1;
} else {
return +1;
}
}
//! An optimized version for string types.
template <class T>
requires
std::is_same_v<T, TString> ||
std::is_same_v<T, TStringBuf> ||
std::is_same_v<T, std::string> ||
std::is_same_v<T, std::string_view>
Y_FORCE_INLINE int TernaryCompare(const T& lhs, const T& rhs)
{
return GetSign(std::string_view(lhs).compare(std::string_view(rhs)));
}
template <class T>
Y_FORCE_INLINE int NaNSafeTernaryCompare(const T& lhs, const T& rhs)
{
return TernaryCompare(lhs, rhs);
}
template <class T>
requires std::is_floating_point_v<T>
Y_FORCE_INLINE int NaNSafeTernaryCompare(const T& lhs, const T& rhs)
{
if (lhs < rhs) {
return -1;
} else if (lhs > rhs) {
return +1;
} else if (std::isnan(lhs)) {
if (std::isnan(rhs)) {
return 0;
} else {
return +1;
}
} else if (std::isnan(rhs)) {
return -1;
} else {
return 0;
}
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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