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diff --git a/src/systemc/sc_attr.hh b/src/systemc/sc_attr.hh
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+/*
+ * Copyright 2018 Google, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Gabe Black
+ */
+
+#ifndef __SYSTEMC_SC_ATTR_HH__
+#define __SYSTEMC_SC_ATTR_HH__
+
+#include <string>
+
+namespace sc_core
+{
+
+class sc_attr_base
+{
+  public:
+    sc_attr_base(const std::string &);
+    sc_attr_base(const sc_attr_base &);
+    virtual ~sc_attr_base();
+
+    const std::string &name() const;
+
+  protected:
+    void warn_unimpl(const char *func);
+
+  private:
+    // Disabled
+    sc_attr_base();
+    sc_attr_base &operator = (const sc_attr_base &);
+};
+
+template <class T>
+class sc_attribute : public sc_attr_base
+{
+  public:
+    sc_attribute(const std::string &_name) : sc_attr_base(_name)
+    {
+        warn_unimpl(__PRETTY_FUNCTION__);
+    }
+    sc_attribute(const std::string &_name, const T &t) :
+        sc_attr_base(_name), value(t)
+    {
+        warn_unimpl(__PRETTY_FUNCTION__);
+    }
+    sc_attribute(const sc_attribute<T> &other) :
+        sc_attr_base(other.name()), value(other.value)
+    {
+        warn_unimpl(__PRETTY_FUNCTION__);
+    }
+    virtual ~sc_attribute() { warn_unimpl(__PRETTY_FUNCTION__); }
+    T value;
+
+  private:
+    // Disabled
+    sc_attribute() {}
+    sc_attribute<T> &operator = (const sc_attribute<T> &) { return *this; }
+};
+
+class sc_attr_cltn
+{
+  public:
+    typedef sc_attr_base *elem_type;
+    typedef elem_type *iterator;
+    typedef const elem_type *const_iterator;
+
+    iterator begin();
+    const_iterator begin() const;
+    iterator end();
+    const_iterator end() const;
+};
+
+} // namespace sc_core
+
+#endif  //__SYSTEMC_SC_ATTR_HH__