var-template

Author: izvolov

libcxx/include/__algorithm/radix_sort.h

@@ -43,7 +43,6 @@
 #include <__numeric/partial_sum.h>
 #include <__type_traits/decay.h>
 #include <__type_traits/enable_if.h>
-#include <__type_traits/integral_constant.h>
 #include <__type_traits/invoke.h>
 #include <__type_traits/is_assignable.h>
 #include <__type_traits/is_enum.h>
@@ -386,14 +385,12 @@ _LIBCPP_HIDE_FROM_ABI constexpr auto __to_ordered_integral(_Enum __e) = delete;
 inline _LIBCPP_HIDE_FROM_ABI constexpr auto __to_ordered_integral(long double) = delete;
 
 template <class _Tp, class = void>
-struct __is_ordered_integer_representable : false_type {};
+inline const bool __is_ordered_integer_representable_v = false;
 
 template <class _Tp>
-struct __is_ordered_integer_representable<_Tp, __void_t<decltype(std::__to_ordered_integral(std::declval<_Tp>()))>>
-    : true_type {};
-
-template <class _Tp>
-inline constexpr auto __is_ordered_integer_representable_v = __is_ordered_integer_representable<_Tp>::value;
+inline const bool
+    __is_ordered_integer_representable_v<_Tp, __void_t<decltype(std::__to_ordered_integral(std::declval<_Tp>()))>> =
+        true;
 
 struct __low_byte_fn {
   template <class _Ip>