1 files changed, 75 insertions, 0 deletions
diff --git a/compilerplugins/clang/test/optvalue.cxx b/compilerplugins/clang/test/optvalue.cxx
new file mode 100644
index 000000000000..6d1ad86e7535
--- /dev/null
+++ b/compilerplugins/clang/test/optvalue.cxx
@@ -0,0 +1,75 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include "config_clang.h"
+
+template <typename Type> class OptValue
+{
+public:
+    OptValue()
+        : maValue()
+        , mbHasValue(false)
+    {
+    }
+    explicit OptValue(const Type& rValue)
+        : maValue(rValue)
+        , mbHasValue(true)
+    {
+    }
+
+    bool has_value() const { return mbHasValue; }
+    bool operator!() const { return !mbHasValue; }
+
+    const Type& value() const { return maValue; }
+    const Type& value_or(const Type& rDefValue) const { return mbHasValue ? maValue : rDefValue; }
+
+    Type& operator*() { return maValue; }
+    Type& emplace()
+    {
+        mbHasValue = true;
+        maValue = Type();
+        return maValue;
+    }
+
+    OptValue& operator=(const Type& rValue)
+    {
+        maValue = rValue;
+        mbHasValue = true;
+        return *this;
+    }
+    bool operator==(const OptValue& rValue) const
+    {
+        return ((!mbHasValue && rValue.mbHasValue == false)
+                || (mbHasValue == rValue.mbHasValue && maValue == rValue.maValue));
+    }
+
+private:
+    Type maValue;
+    bool mbHasValue;
+};
+
+struct AttributeList
+{
+    OptValue<int> getInteger();
+};
+
+namespace test1
+{
+void foo(AttributeList& rAttrs)
+{
+    // expected-error@+1 {{call to OptValue::value() [loplugin:optvalue]}}
+    rAttrs.getInteger().value();
+
+    // no warning expected
+    OptValue<int> x;
+    x.value();
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */