Add mp_fold_q, mp_reverse_fold_q

2017-10-14 20:26:38 +03:00
parent 321f5fdb24
commit e5b4200d24
5 changed files with 146 additions and 0 deletions
@@ -0,0 +1,62 @@
+
+// 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/integral.hpp>
+#include <boost/mp11/utility.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <type_traits>
+#include <tuple>
+
+struct X1 {};
+struct X2 {};
+struct X3 {};
+struct X4 {};
+
+template<class T1, class T2> struct F {};
+
+int main()
+{
+    using boost::mp11::mp_list;
+    using boost::mp11::mp_fold_q;
+    using boost::mp11::mp_quote;
+
+    using Q = mp_quote<F>;
+
+    {
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<mp_list<>, void, Q>, void>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<mp_list<X1>, void, Q>, F<void, X1>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<mp_list<X1, X2>, void, Q>, F<F<void, X1>, X2>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<mp_list<X1, X2, X3>, void, Q>, F<F<F<void, X1>, X2>, X3>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<mp_list<X1, X2, X3, X4>, void, Q>, F<F<F<F<void, X1>, X2>, X3>, X4>>));
+    }
+
+    {
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<>, void, Q>, void>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1>, void, Q>, F<void, X1>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1, X2>, void, Q>, F<F<void, X1>, X2>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1, X2, X3>, void, Q>, F<F<F<void, X1>, X2>, X3>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1, X2, X3, X4>, void, Q>, F<F<F<F<void, X1>, X2>, X3>, X4>>));
+    }
+
+    using boost::mp11::mp_push_back;
+
+    {
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1, X2, X3, X4>, mp_list<>, mp_quote<mp_push_back>>, mp_list<X1, X2, X3, X4>>));
+    }
+
+    using boost::mp11::mp_push_front;
+
+    {
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_fold_q<std::tuple<X1, X2, X3, X4>, mp_list<>, mp_quote<mp_push_front>>, mp_list<X4, X3, X2, X1>>));
+    }
+
+    return boost::report_errors();
+}