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50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
#pragma once
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#include <cmath>
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#include <limits>
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#include <type_traits>
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/// To be sure, that this function is zero-cost for non-floating point types.
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template <typename T>
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inline typename std::enable_if<std::is_floating_point<T>::value, bool>::type isNaN(T x)
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{
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return std::isnan(x);
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}
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template <typename T>
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inline typename std::enable_if<!std::is_floating_point<T>::value, bool>::type isNaN(T x)
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{
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return false;
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}
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template <typename T>
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inline typename std::enable_if<std::is_floating_point<T>::value, bool>::type isFinite(T x)
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{
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return std::isfinite(x);
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}
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template <typename T>
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inline typename std::enable_if<!std::is_floating_point<T>::value, bool>::type isFinite(T x)
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{
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return true;
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}
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template <typename T>
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typename std::enable_if<std::is_floating_point<T>::value, T>::type NaNOrZero()
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{
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return std::numeric_limits<T>::quiet_NaN();
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}
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template <typename T>
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typename std::enable_if<std::numeric_limits<T>::is_integer, T>::type NaNOrZero()
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{
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return 0;
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}
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template <typename T>
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typename std::enable_if<std::is_class<T>::value, T>::type NaNOrZero()
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{
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return T{};
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}
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