2 files changed, 60 insertions, 0 deletions
diff --git a/tests/optional/buildfile b/tests/optional/buildfile
new file mode 100644
index 0000000..68188d7
--- /dev/null
+++ b/tests/optional/buildfile
@@ -0,0 +1,6 @@
+# file      : tests/optional/buildfile
+# license   : MIT; see accompanying LICENSE file
+
+import libs = libbutl%lib{butl}
+
+exe{driver}: {hxx cxx}{*} $libs
diff --git a/tests/optional/driver.cxx b/tests/optional/driver.cxx
new file mode 100644
index 0000000..5dd8964
--- /dev/null
+++ b/tests/optional/driver.cxx
@@ -0,0 +1,54 @@
+// file      : tests/optional/driver.cxx -*- C++ -*-
+// license   : MIT; see accompanying LICENSE file
+
+#include <cassert>
+
+#ifndef __cpp_lib_modules_ts
+#include <vector>
+#include <utility>    // move()
+#endif
+
+// Other includes.
+
+#ifdef __cpp_modules_ts
+#ifdef __cpp_lib_modules_ts
+import std.core;
+#endif
+import butl.optional;
+#else
+#include <libbutl/optional.mxx>
+#endif
+
+using namespace std;
+using namespace butl;
+
+struct redirect
+{
+  redirect () = default;
+
+  redirect (redirect&&) = default;
+  redirect& operator= (redirect&&) = default;
+
+  redirect (const redirect&) = delete;
+  redirect& operator= (const redirect&) = delete;
+};
+
+struct command
+{
+  butl::optional<redirect> err;
+};
+
+int
+main ()
+{
+  /*(
+  command c;
+  vector<command> cs;
+  cs.emplace_back (move (c));
+//  cs.push_back (move (c));
+*/
+
+  redirect r;
+  vector<redirect> rs;
+  rs.emplace_back (move (r));
+}