1 files changed, 99 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/_include/auto/drop_back.hpp b/src/boost/libs/hana/test/_include/auto/drop_back.hpp
new file mode 100644
index 000000000..e3ea42e0c
--- /dev/null
+++ b/src/boost/libs/hana/test/_include/auto/drop_back.hpp
@@ -0,0 +1,99 @@
+// 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)
+
+#ifndef BOOST_HANA_TEST_AUTO_DROP_BACK_HPP
+#define BOOST_HANA_TEST_AUTO_DROP_BACK_HPP
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/drop_back.hpp>
+#include <boost/hana/equal.hpp>
+#include <boost/hana/integral_constant.hpp>
+
+#include <laws/base.hpp>
+#include "test_case.hpp"
+
+
+TestCase test_drop_back{[]{
+    namespace hana = boost::hana;
+    using hana::test::ct_eq;
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(), hana::size_c<0>),
+        MAKE_TUPLE()
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(), hana::size_c<1>),
+        MAKE_TUPLE()
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(), hana::size_c<2>),
+        MAKE_TUPLE()
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<0>),
+        MAKE_TUPLE(ct_eq<0>{})
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<1>),
+        MAKE_TUPLE()
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<2>),
+        MAKE_TUPLE()
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<0>),
+        MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{})
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<1>),
+        MAKE_TUPLE(ct_eq<0>{})
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<2>),
+        MAKE_TUPLE()
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<0>),
+        MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{})
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<1>),
+        MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{})
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<2>),
+        MAKE_TUPLE(ct_eq<0>{})
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::size_c<3>),
+        MAKE_TUPLE()
+    ));
+
+    // make sure hana::drop_back(xs) == hana::drop_back(xs, hana::size_c<1>)
+    BOOST_HANA_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE()),
+        hana::drop_back(MAKE_TUPLE(), hana::size_c<1>)
+    ));
+
+    BOOST_HANA_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{})),
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}), hana::size_c<1>)
+    ));
+
+    BOOST_HANA_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{})),
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}), hana::size_c<1>)
+    ));
+
+    BOOST_HANA_CHECK(hana::equal(
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<2>{})),
+        hana::drop_back(MAKE_TUPLE(ct_eq<0>{}, ct_eq<2>{}), hana::size_c<1>)
+    ));
+}};
+
+#endif // !BOOST_HANA_TEST_AUTO_DROP_BACK_HPP