1 files changed, 83 insertions, 0 deletions
diff --git a/compilerplugins/clang/test/weakbase.cxx b/compilerplugins/clang/test/weakbase.cxx
new file mode 100644
index 0000000000..3d5284ef54
--- /dev/null
+++ b/compilerplugins/clang/test/weakbase.cxx
@@ -0,0 +1,83 @@
+/* -*- 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/.
+ */
+
+namespace tools
+{
+struct WeakBase
+{
+    virtual ~WeakBase();
+};
+}
+
+struct Foo1 : public tools::WeakBase
+{
+    virtual ~Foo1();
+};
+
+struct Foo2 : public tools::WeakBase
+{
+    virtual ~Foo2();
+};
+
+// expected-error@+1 {{found multiple copies of tools::WeakBase, through inheritance paths Bar->Foo1->WeakBase, Bar->Foo2->WeakBase [loplugin:weakbase]}}
+struct Bar : public Foo1, public Foo2
+{
+    virtual ~Bar();
+};
+
+namespace cppu
+{
+class OWeakObject
+{
+};
+}
+
+namespace test2
+{
+class Foo1 : public cppu::OWeakObject
+{
+};
+class Foo2 : public cppu::OWeakObject
+{
+};
+// expected-error@+1 {{found multiple copies of cppu::OWeakObject, through inheritance paths Foo3->Foo1->OWeakObject, Foo3->Foo2->OWeakObject [loplugin:weakbase]}}
+class Foo3 : public Foo1, public Foo2
+{
+};
+}
+
+namespace test3
+{
+class Foo1 : public virtual cppu::OWeakObject
+{
+};
+class Foo2 : public virtual cppu::OWeakObject
+{
+};
+// no warning expected
+class Foo3 : public Foo1, public Foo2
+{
+};
+}
+
+namespace test4
+{
+class Foo1 : public cppu::OWeakObject
+{
+};
+class Foo2 : public virtual cppu::OWeakObject
+{
+};
+// expected-error@+1 {{found one virtual base and one or more normal bases of cppu::OWeakObject, through inheritance paths Foo3->Foo1->OWeakObject, Foo3->Foo2->OWeakObject [loplugin:weakbase]}}
+class Foo3 : public Foo1, public Foo2
+{
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */