fix example

Author: mcb5637

examples/example_pointer_tag_pair.cpp

@@ -1,4 +1,5 @@
 #include <cassert>
+#include <tuple>
 
 import dice.template_library;
 

src/dice/template-library/pointer_tag_pair.cppm

@@ -116,34 +116,34 @@ namespace dice::template_library {
     }
 } // namespace dice::template_library
 
-export extern "C++" {
-template<typename T, typename Tag, unsigned BitsRequested>
-struct std::tuple_size<dice::template_library::pointer_tag_pair<T, Tag, BitsRequested> > {
-    static constexpr size_t value = 2;
-};
-
-template<typename T, typename Tag, unsigned BitsRequested>
-struct std::tuple_size<dice::template_library::pointer_tag_pair<T, Tag, BitsRequested> const> {
-    static constexpr size_t value = 2;
-};
-
-template<typename T, typename Tag, unsigned BitsRequested>
-struct std::tuple_element<0, dice::template_library::pointer_tag_pair<T, Tag, BitsRequested> > {
-    using type = T *;
-};
-
-template<typename T, typename Tag, unsigned BitsRequested>
-struct std::tuple_element<1, dice::template_library::pointer_tag_pair<T, Tag, BitsRequested> > {
-    using type = Tag;
-};
-
-template<typename T, typename Tag, unsigned BitsRequested>
-struct std::tuple_element<0, dice::template_library::pointer_tag_pair<T, Tag, BitsRequested> const> {
-    using type = T *;
-};
-
-template<typename T, typename Tag, unsigned BitsRequested>
-struct std::tuple_element<1, dice::template_library::pointer_tag_pair<T, Tag, BitsRequested> const> {
-    using type = Tag;
-};
+export {
+    template<typename T, typename Tag, unsigned BitsRequested>
+    struct std::tuple_size<dice::template_library::pointer_tag_pair<T, Tag, BitsRequested>> {
+        static constexpr size_t value = 2;
+    };
+
+    template<typename T, typename Tag, unsigned BitsRequested>
+    struct std::tuple_size<dice::template_library::pointer_tag_pair<T, Tag, BitsRequested> const> {
+        static constexpr size_t value = 2;
+    };
+
+    template<typename T, typename Tag, unsigned BitsRequested>
+    struct std::tuple_element<0, dice::template_library::pointer_tag_pair<T, Tag, BitsRequested>> {
+        using type = T *;
+    };
+
+    template<typename T, typename Tag, unsigned BitsRequested>
+    struct std::tuple_element<1, dice::template_library::pointer_tag_pair<T, Tag, BitsRequested>> {
+        using type = Tag;
+    };
+
+    template<typename T, typename Tag, unsigned BitsRequested>
+    struct std::tuple_element<0, dice::template_library::pointer_tag_pair<T, Tag, BitsRequested> const> {
+        using type = T *;
+    };
+
+    template<typename T, typename Tag, unsigned BitsRequested>
+    struct std::tuple_element<1, dice::template_library::pointer_tag_pair<T, Tag, BitsRequested> const> {
+        using type = Tag;
+    };
 }