Add mp_value; enable mp_rename on value lists. Refs #53.

test/Jamfile

@@ -34,6 +34,7 @@ run mp_third.cpp ;
 run mp_push_front.cpp ;
 run mp_push_back.cpp ;
 run mp_rename.cpp ;
+run mp_rename_2.cpp ;
 run mp_append.cpp ;
 run mp_append_2.cpp ;
 run mp_append_sf.cpp ;
@@ -133,6 +134,7 @@ run mp_join.cpp ;
 
 # integral
 run integral.cpp ;
+run mp_value.cpp ;
 
 # utility
 run mp_identity.cpp ;

test/mp_rename_2.cpp

@@ -0,0 +1,44 @@
+// Copyright 2015-2023 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... T> struct L {};
+
+int main()
+{
+    using boost::mp11::mp_list;
+    using boost::mp11::mp_rename;
+    using boost::mp11::mp_true;
+    using boost::mp11::mp_false;
+    using boost::mp11::mp_int;
+    using boost::mp11::mp_size_t;
+
+    BOOST_TEST_TRAIT_SAME(mp_rename<L<>, mp_list>, mp_list<>);
+
+    BOOST_TEST_TRAIT_SAME(mp_rename<L<false>, mp_list>, mp_list<mp_false>);
+    BOOST_TEST_TRAIT_SAME(mp_rename<L<true>, mp_list>, mp_list<mp_true>);
+
+    BOOST_TEST_TRAIT_SAME(mp_rename<L<0>, mp_list>, mp_list<mp_int<0>>);
+    BOOST_TEST_TRAIT_SAME(mp_rename<L<-1>, mp_list>, mp_list<mp_int<-1>>);
+
+    BOOST_TEST_TRAIT_SAME(mp_rename<L<std::size_t(0)>, mp_list>, mp_list<mp_size_t<0>>);
+    BOOST_TEST_TRAIT_SAME(mp_rename<L<std::size_t(1)>, mp_list>, mp_list<mp_size_t<1>>);
+
+    BOOST_TEST_TRAIT_SAME(mp_rename<L<false, 0, std::size_t(0)>, mp_list>, mp_list<mp_false, mp_int<0>, mp_size_t<0>>);
+
+    return boost::report_errors();
+}
+
+#endif

test/mp_value.cpp

@@ -0,0 +1,40 @@
+// Copyright 2023 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/mp11/integral.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/core/lightweight_test_trait.hpp>
+#include <type_traits>
+#include <cstddef>
+
+int main()
+{
+    using boost::mp11::mp_value;
+
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_value<false>, std::integral_constant<bool, false>>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_value<true>, std::integral_constant<bool, true>>));
+
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_value<'a'>, std::integral_constant<char, 'a'>>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_value<'0'>, std::integral_constant<char, '0'>>));
+
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_value<0>, std::integral_constant<int, 0>>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_value<-1>, std::integral_constant<int, -1>>));
+
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_value<0L>, std::integral_constant<long, 0>>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_value<-1L>, std::integral_constant<long, -1>>));
+
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_value<0u>, std::integral_constant<unsigned, 0>>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_value<1u>, std::integral_constant<unsigned, 1>>));
+
+    return boost::report_errors();
+}
+
+#endif