iterator: iter_move(iterator)

Author: PaulXiCao

libcxx/include/__ranges/cartesian_product_view.h

@@ -12,6 +12,7 @@
 #include <__config>
 #include <__iterator/access.h> // begin
 #include <__iterator/distance.h>
+#include <__iterator/iter_move.h>
 #include <__iterator/next.h>
 #include <__memory/addressof.h>
 #include <__ranges/concepts.h> // forward_range, view, range_size_t, sized_range, ...
@@ -234,6 +235,10 @@ class cartesian_product_view<First, Vs...>::iterator {
     return -(i - s);
   }
 
+  friend constexpr auto iter_move(const iterator& i) /*fixme: noexcept(...) */ {
+    return __tuple_transform(ranges::iter_move, i.current_);
+  }
+
 private:
   using Parent    = __maybe_const<Const, cartesian_product_view>;
   Parent* parent_ = nullptr;