1 files changed, 53 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/map/union.cpp b/src/boost/libs/hana/example/map/union.cpp
new file mode 100644
index 00000000..d214b34d
--- /dev/null
+++ b/src/boost/libs/hana/example/map/union.cpp
@@ -0,0 +1,53 @@
+// Copyright Louis Dionne 2013-2017
+// 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/assert.hpp>
+#include <boost/hana/equal.hpp>
+#include <boost/hana/integral_constant.hpp>
+#include <boost/hana/string.hpp>
+#include <boost/hana/map.hpp>
+#include <boost/hana/type.hpp>
+#include <boost/hana/union.hpp>
+
+#include <string>
+namespace hana = boost::hana;
+using namespace hana::literals;
+
+
+static auto m1 = hana::make_map(
+    hana::make_pair(BOOST_HANA_STRING("key1"), hana::type_c<std::string>),
+    hana::make_pair(BOOST_HANA_STRING("key2"), hana::type_c<std::string>)
+);
+
+static auto m2 = hana::make_map(
+    hana::make_pair(BOOST_HANA_STRING("key3"), hana::type_c<std::string>),
+    hana::make_pair(BOOST_HANA_STRING("key4"), hana::type_c<std::string>),
+    hana::make_pair(BOOST_HANA_STRING("key5"), hana::type_c<std::string>)
+);
+
+BOOST_HANA_CONSTANT_CHECK(hana::union_(m1, m2) == hana::make_map(
+       hana::make_pair(BOOST_HANA_STRING("key1"), hana::type_c<std::string>),
+       hana::make_pair(BOOST_HANA_STRING("key2"), hana::type_c<std::string>),
+       hana::make_pair(BOOST_HANA_STRING("key3"), hana::type_c<std::string>),
+       hana::make_pair(BOOST_HANA_STRING("key4"), hana::type_c<std::string>),
+       hana::make_pair(BOOST_HANA_STRING("key5"), hana::type_c<std::string>)
+));
+
+constexpr auto m3 = hana::make_map(
+    hana::make_pair(hana::type_c<int>, hana::int_c<1>),
+    hana::make_pair(hana::type_c<bool>, hana::bool_c<true>)
+);
+
+constexpr auto m4 = hana::make_map(
+       hana::make_pair(hana::type_c<char>, hana::char_c<'c'>),
+       hana::make_pair(hana::type_c<bool>, hana::bool_c<false>)
+);
+
+BOOST_HANA_CONSTANT_CHECK(hana::union_(m3, m4) == hana::make_map(
+       hana::make_pair(hana::type_c<int>, hana::int_c<1>),
+       hana::make_pair(hana::type_c<bool>, hana::bool_c<false>),
+       hana::make_pair(hana::type_c<char>, hana::char_c<'c'>)
+));
+
+int main() { }