1 files changed, 45 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/range/unpack.cpp b/src/boost/libs/hana/test/range/unpack.cpp
new file mode 100644
index 000000000..45b2e7287
--- /dev/null
+++ b/src/boost/libs/hana/test/range/unpack.cpp
@@ -0,0 +1,45 @@
+// 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/core/make.hpp>
+#include <boost/hana/core/tag_of.hpp>
+#include <boost/hana/equal.hpp>
+#include <boost/hana/integral_constant.hpp>
+#include <boost/hana/range.hpp>
+#include <boost/hana/unpack.hpp>
+
+#include <laws/base.hpp>
+
+#include <type_traits>
+namespace hana = boost::hana;
+
+
+int main() {
+    hana::test::_injection<0> f{};
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::unpack(hana::make_range(hana::int_c<0>, hana::int_c<0>), f),
+        f()
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::unpack(hana::make_range(hana::int_c<0>, hana::int_c<1>), f),
+        f(hana::int_c<0>)
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::unpack(hana::make_range(hana::int_c<0>, hana::int_c<2>), f),
+        f(hana::int_c<0>, hana::int_c<1>)
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::unpack(hana::make_range(hana::int_c<0>, hana::int_c<3>), f),
+        f(hana::int_c<0>, hana::int_c<1>, hana::int_c<2>)
+    ));
+
+    // Previously, we would only unpack with `std::size_t`s. Make
+    // sure this does not happen.
+    hana::unpack(hana::make_range(hana::int_c<0>, hana::int_c<1>), [](auto x) {
+        using T = hana::tag_of_t<decltype(x)>;
+        static_assert(std::is_same<typename T::value_type, int>{}, "");
+    });
+}