1 files changed, 71 insertions, 0 deletions
diff --git a/lotuswordpro/source/filter/clone.hxx b/lotuswordpro/source/filter/clone.hxx
new file mode 100644
index 000000000..fe4c64519
--- /dev/null
+++ b/lotuswordpro/source/filter/clone.hxx
@@ -0,0 +1,71 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * 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/.
+ */
+
+#ifndef INCLUDED_LOTUSWORDPRO_SOURCE_FILTER_CLONE_HXX
+#define INCLUDED_LOTUSWORDPRO_SOURCE_FILTER_CLONE_HXX
+
+namespace detail
+{
+
+template<typename T>
+struct has_clone
+{
+    template<typename U, U x>
+    struct test;
+
+    typedef char yes;
+    typedef struct { char a[2]; } no;
+
+    template<typename U>
+    static yes& check_sig(U*, test<U* (U::*)() const, &U::clone>* = nullptr);
+    template<typename U>
+    static no& check_sig(...);
+
+    enum
+    {
+        value = sizeof(check_sig<T>(nullptr)) == sizeof(yes)
+    };
+};
+
+template<typename T, bool HasClone>
+struct cloner
+{
+    static T* clone(T* const other)
+    {
+        return new T(*other);
+    }
+};
+
+template<typename T>
+struct cloner<T, true>
+{
+    static T* clone(T* const other)
+    {
+        return other->clone();
+    }
+};
+
+}
+
+/** Creates a new copy of the passed object.
+    If other is 0, just returns 0. Otherwise, if other has function
+    named clone with signature T* (T::*)() const, the function is called.
+    Otherwise, copy constructor is used.
+
+    @returns 0 or newly allocated object
+ */
+template<typename T>
+T* clone(T* const other)
+{
+    return other ? ::detail::cloner<T, ::detail::has_clone<T>::value>::clone(other) : nullptr;
+}
+
+#endif // INCLUDED_LOTUSWORDPRO_SOURCE_FILTER_CLONE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */