diff --git a/include/boost/mp11/list.hpp b/include/boost/mp11/list.hpp
index 7d2053a..b5daed3 100644
--- a/include/boost/mp11/list.hpp
+++ b/include/boost/mp11/list.hpp
@@ -69,13 +69,35 @@ template<class L> using mp_empty = mp_bool< mp_size<L>::value == 0 >;
 namespace detail
 {
 
-template<class L1, class L2> struct mp_assign_impl;
+template<class L1, class L2> struct mp_assign_impl
+{
+// An error "no type named 'type'" here means that the arguments to mp_assign aren't lists
+};
 
 template<template<class...> class L1, class... T, template<class...> class L2, class... U> struct mp_assign_impl<L1<T...>, L2<U...>>
 {
     using type = L1<U...>;
 };
 
+#if defined(BOOST_MP11_HAS_TEMPLATE_AUTO)
+
+template<template<auto...> class L1, auto... A, template<class...> class L2, class... U> struct mp_assign_impl<L1<A...>, L2<U...>>
+{
+    using type = L1<U::value...>;
+};
+
+template<template<class...> class L1, class... T, template<auto...> class L2, auto... B> struct mp_assign_impl<L1<T...>, L2<B...>>
+{
+    using type = L1<mp_value<B>...>;
+};
+
+template<template<auto...> class L1, auto... A, template<auto...> class L2, auto... B> struct mp_assign_impl<L1<A...>, L2<B...>>
+{
+    using type = L1<B...>;
+};
+
+#endif
+
 } // namespace detail
 
 template<class L1, class L2> using mp_assign = typename detail::mp_assign_impl<L1, L2>::type;
diff --git a/test/Jamfile b/test/Jamfile
index 2ea2f61..21fb57a 100644
--- a/test/Jamfile
+++ b/test/Jamfile
@@ -29,6 +29,10 @@ run mp_size.cpp ;
 run mp_size_2.cpp ;
 run mp_empty.cpp ;
 run mp_empty_2.cpp ;
+run mp_assign.cpp ;
+run mp_assign_2.cpp ;
+run mp_clear.cpp ;
+run mp_clear_2.cpp ;
 run mp_front.cpp ;
 run mp_pop_front.cpp ;
 run mp_second.cpp ;
@@ -54,8 +58,6 @@ run mp_list_v.cpp ;
 run mp_rename_v.cpp ;
 
 # algorithm
-run mp_assign.cpp ;
-run mp_clear.cpp ;
 run mp_transform.cpp ;
 run mp_transform_q.cpp ;
 run mp_transform_sf.cpp ;
diff --git a/test/mp_assign_2.cpp b/test/mp_assign_2.cpp
new file mode 100644
index 0000000..be35898
--- /dev/null
+++ b/test/mp_assign_2.cpp
@@ -0,0 +1,89 @@
+// Copyright 2023 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/mp11/list.hpp>
+
+#if !defined(BOOST_MP11_HAS_TEMPLATE_AUTO)
+
+#pragma message("Test skipped because BOOST_MP11_HAS_TEMPLATE_AUTO is not defined")
+int main() {}
+
+#else
+
+#include <boost/mp11/integral.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <utility>
+
+template<auto... A> struct L1 {};
+template<int... I> struct L2 {};
+
+int main()
+{
+    using boost::mp11::mp_list;
+    using boost::mp11::mp_list_v;
+    using boost::mp11::mp_assign;
+    using boost::mp11::mp_false;
+    using boost::mp11::mp_true;
+    using boost::mp11::mp_int;
+
+    //
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, mp_list_v<>>, L1<>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, mp_list_v<true>>, L1<true>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, mp_list_v<true, -4>>, L1<true, -4>);
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, mp_list_v<>>, L1<>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, mp_list_v<false>>, L1<false>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, mp_list_v<false, -4>>, L1<false, -4>);
+
+    //
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, L2<>>, L1<>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, L2<0>>, L1<0>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, L2<0, 1>>, L1<0, 1>);
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, L2<>>, L1<>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, L2<0>>, L1<0>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, L2<0, 1>>, L1<0, 1>);
+
+    //
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<L2<>, L1<>>, L2<>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L2<>, L1<0>>, L2<0>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L2<>, L1<0, 1>>, L2<0, 1>);
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<L2<1, 2>, L1<>>, L2<>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L2<1, 2>, L1<0>>, L2<0>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<L2<1, 2>, L1<0, 1>>, L2<0, 1>);
+
+    //
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<>, mp_list_v<>>, mp_list<>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<>, mp_list_v<true>>, mp_list<mp_true>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<>, mp_list_v<true, -4>>, mp_list<mp_true, mp_int<-4>>);
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<void, float>, mp_list_v<>>, mp_list<>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<void, float>, mp_list_v<true>>, mp_list<mp_true>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<void, float>, mp_list_v<true, -4>>, mp_list<mp_true, mp_int<-4>>);
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<std::pair<int, float>, mp_list_v<true, -4>>, std::pair<mp_true, mp_int<-4>>);
+
+    //
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<>, mp_list<>>, mp_list_v<>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<>, mp_list<mp_true>>, mp_list_v<true>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<>, mp_list<mp_true, mp_int<-4>>>, mp_list_v<true, -4>);
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<false, 0>, mp_list<>>, mp_list_v<>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<false, 0>, mp_list<mp_true>>, mp_list_v<true>);
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<false, 0>, mp_list<mp_true, mp_int<-4>>>, mp_list_v<true, -4>);
+
+    BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<false, 0>, std::pair<mp_true, mp_int<-4>>>, mp_list_v<true, -4>);
+
+    //
+
+    return boost::report_errors();
+}
+
+#endif
diff --git a/test/mp_clear_2.cpp b/test/mp_clear_2.cpp
new file mode 100644
index 0000000..2c5853d
--- /dev/null
+++ b/test/mp_clear_2.cpp
@@ -0,0 +1,32 @@
+// Copyright 2023 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/mp11/list.hpp>
+
+#if !defined(BOOST_MP11_HAS_TEMPLATE_AUTO)
+
+#pragma message("Test skipped because BOOST_MP11_HAS_TEMPLATE_AUTO is not defined")
+int main() {}
+
+#else
+
+#include <boost/mp11/integral.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+
+template<auto... A> struct L1 {};
+template<int... I> struct L2 {};
+
+int main()
+{
+    using boost::mp11::mp_list_v;
+    using boost::mp11::mp_clear;
+
+    BOOST_TEST_TRAIT_SAME(mp_clear<mp_list_v<false, true, 0, -4>>, mp_list_v<>);
+    BOOST_TEST_TRAIT_SAME(mp_clear<L1<false, true, 0, -4>>, L1<>);
+    BOOST_TEST_TRAIT_SAME(mp_clear<L2<0, 1, 2>>, L2<>);
+
+    return boost::report_errors();
+}
+
+#endif