1 files changed, 43 insertions, 0 deletions
diff --git a/src/boost/libs/parameter/test/maybe.cpp b/src/boost/libs/parameter/test/maybe.cpp
new file mode 100644
index 000000000..bb00a9b7e
--- /dev/null
+++ b/src/boost/libs/parameter/test/maybe.cpp
@@ -0,0 +1,43 @@
+// Copyright Daniel Wallin 2006.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/parameter/name.hpp>
+
+namespace test {
+
+    BOOST_PARAMETER_NAME(kw)
+    BOOST_PARAMETER_NAME(unused)
+
+    template <typename Args>
+    int f(Args const& args)
+    {
+        return args[test::_kw | 1.f];
+    }
+} // namespace test
+
+#include <boost/parameter/aux_/maybe.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    BOOST_TEST_EQ(0, test::f((test::_kw = 0, test::_unused = 0)));
+    BOOST_TEST_EQ(1, test::f(test::_unused = 0));
+    BOOST_TEST_EQ(
+        1
+      , test::f((
+            test::_kw = boost::parameter::aux::maybe<int>()
+          , test::_unused = 0
+        ))
+    );
+    BOOST_TEST_EQ(
+        2
+      , test::f((
+            test::_kw = boost::parameter::aux::maybe<int>(2)
+          , test::_unused = 0
+        ))
+    );
+    return boost::report_errors();
+}
+