Simplification

src/Common/NaNUtils.h

@@ -4,48 +4,33 @@
 #include <limits>
 #include <type_traits>
 
-#include <common/extended_types.h>
-
 
+template <typename T>
+inline bool isNaN(T x)
+{
     /// To be sure, that this function is zero-cost for non-floating point types.
-template <typename T>
-inline std::enable_if_t<std::is_floating_point_v<T>, bool> isNaN(T x)
-{
+    if constexpr (std::is_floating_point_v<T>)
         return std::isnan(x);
-}
-
-template <typename T>
-inline std::enable_if_t<!std::is_floating_point_v<T>, bool> isNaN(T)
-{
+    else
         return false;
 }
 
-template <typename T>
-inline std::enable_if_t<std::is_floating_point_v<T>, bool> isFinite(T x)
-{
-    return std::isfinite(x);
-}
 
 template <typename T>
-inline std::enable_if_t<!std::is_floating_point_v<T>, bool> isFinite(T)
+inline bool isFinite(T x)
 {
+    if constexpr (std::is_floating_point_v<T>)
+        return std::isfinite(x);
+    else
         return true;
 }
 
+
 template <typename T>
-std::enable_if_t<std::is_floating_point_v<T>, T> NaNOrZero()
+T NaNOrZero()
 {
+    if constexpr (std::is_floating_point_v<T>)
         return std::numeric_limits<T>::quiet_NaN();
-}
-
-template <typename T>
-std::enable_if_t<is_integer_v<T>, T> NaNOrZero()
-{
-    return T{0};
-}
-
-template <typename T>
-std::enable_if_t<std::is_class_v<T> && !is_integer_v<T>, T> NaNOrZero()
-{
-    return T{};
+    else
+        return {};
 }