move exposition-only concepts to shareable place

Author: changkhothuychung

libcxx/include/__ranges/concat_view.h

@@ -88,9 +88,6 @@ struct __last_view<_View> {
   using type _LIBCPP_NODEBUG = _View;
 };
 
-template <bool _Const, class... _Views>
-concept __all_forward = (forward_range<__maybe_const<_Const, _Views>> && ...);
-
 template <bool _Const, class... _Tp>
 struct __apply_drop_first;
 

libcxx/include/__ranges/concepts.h

@@ -180,6 +180,15 @@ concept __concatable = requires {
   typename __concat_rvalue_reference_t<_Rs...>;
 } && __concat_indirectly_readable<_Rs...>;
 
+template <bool _Const, class... _Views>
+concept __all_random_access = (random_access_range<__maybe_const<_Const, _Views>> && ...);
+
+template <bool _Const, class... _Views>
+concept __all_bidirectional = (bidirectional_range<__maybe_const<_Const, _Views>> && ...);
+
+template <bool _Const, class... _Views>
+concept __all_forward = (forward_range<__maybe_const<_Const, _Views>> && ...);
+
 #  endif // _LIBCPP_STD_VER >= 23
 
 } // namespace ranges