Add mp_partition_q

test/mp_partition_q.cpp

@@ -0,0 +1,52 @@
+
+// Copyright 2015, 2017 Peter Dimov.
+//
+// Distributed under the Boost Software License, Version 1.0.
+//
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+
+
+#include <boost/mp11/algorithm.hpp>
+#include <boost/mp11/list.hpp>
+#include <boost/mp11/utility.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <type_traits>
+#include <tuple>
+
+struct X1 {};
+struct X2 {};
+struct X3 {};
+
+int main()
+{
+    using boost::mp11::mp_list;
+    using boost::mp11::mp_partition_q;
+    using boost::mp11::mp_quote;
+
+    {
+        using L1 = mp_list<>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_partition_q<L1, mp_quote<std::is_const>>, mp_list<L1, L1>>));
+
+        using L2 = mp_list<X1, X1 const, X1*, X2 const, X2*, X3*>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_partition_q<L2, mp_quote<std::is_volatile>>, mp_list<L1, L2>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_partition_q<L2, mp_quote<std::is_const>>, mp_list<mp_list<X1 const, X2 const>, mp_list<X1, X1*, X2*, X3*>>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_partition_q<L2, mp_quote<std::is_pointer>>, mp_list<mp_list<X1*, X2*, X3*>, mp_list<X1, X1 const, X2 const>>>));
+    }
+
+    {
+        using L1 = std::tuple<>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_partition_q<L1, mp_quote<std::is_const>>, std::tuple<L1, L1>>));
+
+        using L2 = std::tuple<X1, X1 const, X1*, X2 const, X2*, X3*>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_partition_q<L2, mp_quote<std::is_volatile>>, std::tuple<L1, L2>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_partition_q<L2, mp_quote<std::is_const>>, std::tuple<std::tuple<X1 const, X2 const>, std::tuple<X1, X1*, X2*, X3*>>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_partition_q<L2, mp_quote<std::is_pointer>>, std::tuple<std::tuple<X1*, X2*, X3*>, std::tuple<X1, X1 const, X2 const>>>));
+    }
+
+    return boost::report_errors();
+}