Promote List to a type class.

example/integer_list/integer_list.cpp

@@ -0,0 +1,18 @@
+/*
+@copyright Louis Dionne 2014
+Distributed under the Boost Software License, Version 1.0.
+(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+ */
+
+#include <boost/hana/detail/static_assert.hpp>
+#include <boost/hana/integer_list.hpp>
+#include <boost/hana/integral.hpp>
+using namespace boost::hana;
+
+
+int main() {
+    //! [main]
+    BOOST_HANA_STATIC_ASSERT(to<List>(integer_list<int, 0, 1, 2>) == list(int_<0>, int_<1>, int_<2>));
+    BOOST_HANA_STATIC_ASSERT(head(integer_list<int, 0, 1, 2>) == int_<0>);
+    //! [main]
+}