Fix SFINAE?

lanl · Nov 20, 2024 · 956ccc8 · 956ccc8
1 parent 47a720f
commit 956ccc8
Showing 1 changed file with 6 additions and 6 deletions.
diff --git a/ports-of-call/span.hpp b/ports-of-call/span.hpp
@@ -56,15 +56,15 @@ using std::data;
 using std::size;
 
 // type-safe check against 0 (prevents warnings about comparing an unsigned against 0)
-template <typename T>
-PORTABLE_FUNCTION constexpr std::enable_if_t<std::is_unsigned<T>::value>
-check_nonnegative(const T)
+template <typename T,
+     std::enable_if_t<std::is_unsigned<T>::value, bool> = true>
+PORTABLE_FUNCTION constexpr bool check_nonnegative(const T)
 {
   return true;
 }
-template <typename T>
-PORTABLE_FUNCTION constexpr std::enable_if_t<!std::is_unsigned<T>::value>
-check_nonnegative([[maybe_unused]] const T t)
+template <typename T,
+     std::enable_if_t<!std::is_unsigned<T>::value, bool> = true>
+PORTABLE_FUNCTION constexpr bool check_nonnegative(const T t)
 {
     return t >= 0;
 }