add __is_callable_v variable template when possible (#2598)

NVIDIA · Oct 18, 2024 · 084cd53 · 084cd53
1 parent 8821917
commit 084cd53
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/libcudacxx/include/cuda/std/__type_traits/is_callable.h b/libcudacxx/include/cuda/std/__type_traits/is_callable.h
@@ -34,6 +34,11 @@ template <class _Func, class... _Args>
 struct __is_callable : decltype(__is_callable_helper<_Func, _Args...>(0))
 {};
 
+#ifndef _CCCL_NO_VARIABLE_TEMPLATES
+template <class _Func, class... _Args>
+_CCCL_INLINE_VAR constexpr bool __is_callable_v = decltype(__is_callable_helper<_Func, _Args...>(0))::value;
+#endif // !_CCCL_NO_VARIABLE_TEMPLATES
+
 _LIBCUDACXX_END_NAMESPACE_STD
 
 #endif // _LIBCUDACXX___TYPE_TRAITS_IS_CALLABLE_H