Add tests for mp_count, mp_count_if.

test/mp_count_if.cpp

@@ -0,0 +1,59 @@
+
+//  Copyright 2015 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/core/lightweight_test_trait.hpp>
+#include <type_traits>
+#include <tuple>
+#include <utility>
+
+struct X1 {};
+
+int main()
+{
+    using boost::mp_list;
+    using boost::mp_count_if;
+    using boost::mp_size_t;
+
+    {
+        using L1 = mp_list<>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L1, std::is_const>, mp_size_t<0>>));
+
+        using L2 = mp_list<X1, X1 const, X1*, X1 const, X1*, X1*>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_volatile>, mp_size_t<0>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_const>, mp_size_t<2>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_pointer>, mp_size_t<3>>));
+    }
+
+    {
+        using L1 = std::tuple<>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L1, std::is_const>, mp_size_t<0>>));
+
+        using L2 = std::tuple<X1, X1 const, X1*, X1 const, X1*, X1*>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_volatile>, mp_size_t<0>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_const>, mp_size_t<2>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_pointer>, mp_size_t<3>>));
+    }
+
+    {
+        using L2 = std::pair<X1 const, X1*>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_volatile>, mp_size_t<0>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_const>, mp_size_t<1>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count_if<L2, std::is_pointer>, mp_size_t<1>>));
+    }
+
+    return boost::report_errors();
+}