1 files changed, 44 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/span.cpp b/src/boost/libs/hana/example/span.cpp
new file mode 100644
index 00000000..c3109563
--- /dev/null
+++ b/src/boost/libs/hana/example/span.cpp
@@ -0,0 +1,44 @@
+// 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/less.hpp>
+#include <boost/hana/pair.hpp>
+#include <boost/hana/span.hpp>
+#include <boost/hana/tuple.hpp>
+namespace hana = boost::hana;
+
+
+constexpr auto xs = hana::make_tuple(hana::int_c<1>, hana::int_c<2>, hana::int_c<3>, hana::int_c<4>);
+
+BOOST_HANA_CONSTANT_CHECK(
+    hana::span(xs, hana::less.than(hana::int_c<3>))
+    ==
+    hana::make_pair(hana::make_tuple(hana::int_c<1>, hana::int_c<2>),
+                    hana::make_tuple(hana::int_c<3>, hana::int_c<4>))
+);
+
+BOOST_HANA_CONSTANT_CHECK(
+    hana::span(xs, hana::less.than(hana::int_c<0>))
+    ==
+    hana::make_pair(hana::make_tuple(), xs)
+);
+
+BOOST_HANA_CONSTANT_CHECK(
+    hana::span(xs, hana::less.than(hana::int_c<5>))
+    ==
+    hana::make_pair(xs, hana::make_tuple())
+);
+
+// span.by is syntactic sugar
+BOOST_HANA_CONSTANT_CHECK(
+    hana::span.by(hana::less.than(hana::int_c<3>), xs)
+    ==
+    hana::make_pair(hana::make_tuple(hana::int_c<1>, hana::int_c<2>),
+                    hana::make_tuple(hana::int_c<3>, hana::int_c<4>))
+);
+
+int main() { }