Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/src/boost/libs/hana/test/optional/find_if.cpp b/src/boost/libs/hana/test/optional/find_if.cpp
new file mode 100644
index 00000000..7ee20f82
--- /dev/null
+++ b/src/boost/libs/hana/test/optional/find_if.cpp
@@ -0,0 +1,38 @@
+// 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/find_if.hpp>
+#include <boost/hana/optional.hpp>
+
+#include <laws/base.hpp>
+namespace hana = boost::hana;
+using hana::test::ct_eq;
+
+
+int main() {
+    ct_eq<2> x{};
+    ct_eq<3> y{};
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::find_if(hana::just(x), hana::equal.to(x)),
+        hana::just(x)
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::find_if(hana::just(x), hana::equal.to(y)),
+        hana::nothing
+    ));
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::find_if(hana::nothing, hana::equal.to(x)),
+        hana::nothing
+    ));
+
+    // Previously, there was a bug that would make this fail.
+    auto non_const_nothing = hana::nothing;
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::find_if(non_const_nothing, hana::equal.to(x)),
+        hana::nothing
+    ));
+}