Revert "try to silence warnings from apple-clang"

This reverts commit 447d221.

include/meta/meta.hpp

@@ -2837,6 +2837,10 @@ namespace meta
         {
             static constexpr T value{};
         };
+
+        // Avoid potential ODR violations with global objects:
+        template <typename T>
+        constexpr T static_const<T>::value;
     } // namespace detail
 
     ///\endcond

include/range/v3/iterator/diffmax_t.hpp

@@ -433,6 +433,33 @@ namespace std
     struct numeric_limits<::ranges::detail::diffmax_t const volatile>
       : numeric_limits<::ranges::detail::diffmax_t>
     {};
+
+#if RANGES_CXX_INLINE_VARIABLES >= RANGES_CXX_INLINE_VARIABLES_17
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::is_specialized;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::is_signed;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::is_integer;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::is_exact;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::has_infinity;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::has_quiet_NaN;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::has_signaling_NaN;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::has_denorm;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::has_denorm_loss;
+    inline constexpr std::float_round_style
+        numeric_limits<::ranges::detail::diffmax_t>::round_style;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::is_iec559;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::is_bounded;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::is_modulo;
+    inline constexpr int numeric_limits<::ranges::detail::diffmax_t>::digits;
+    inline constexpr int numeric_limits<::ranges::detail::diffmax_t>::digits10;
+    inline constexpr int numeric_limits<::ranges::detail::diffmax_t>::max_digits10;
+    inline constexpr int numeric_limits<::ranges::detail::diffmax_t>::radix;
+    inline constexpr int numeric_limits<::ranges::detail::diffmax_t>::min_exponent;
+    inline constexpr int numeric_limits<::ranges::detail::diffmax_t>::min_exponent10;
+    inline constexpr int numeric_limits<::ranges::detail::diffmax_t>::max_exponent;
+    inline constexpr int numeric_limits<::ranges::detail::diffmax_t>::max_exponent10;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::traps;
+    inline constexpr bool numeric_limits<::ranges::detail::diffmax_t>::tinyness_before;
+#endif
 } // namespace std
 /// \endcond
 

include/range/v3/utility/static_const.hpp

@@ -22,6 +22,11 @@ namespace ranges
     {
         static constexpr T value{};
     };
+
+    /// \ingroup group-utility
+    /// \sa `static_const`
+    template<typename T>
+    constexpr T static_const<T>::value;
 } // namespace ranges
 
 #endif