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+// testsubclass.hh --- unit test for analyzer and complex C++ inheritance
+
+// Copyright (C) 2007-2021 Free Software Foundation, Inc.
+
+// Author: Eric M. Ludlam <zappo@gnu.org>
+
+// This file is part of GNU Emacs.
+
+// GNU Emacs is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// GNU Emacs is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+
+//#include <cmath>
+// #include <stdio.h>
+
+#ifndef TESTSUBCLASS_HH
+#define TESTSUBCLASS_HH
+
+namespace animal {
+
+  class moose {
+  public:
+    moose() : fFeet(0),
+	      fIsValid(false)
+    { }
+
+    virtual void setFeet(int);
+    int getFeet();
+
+    void doNothing();
+
+    enum moose_enum {
+      NAME1, NAME2, NAME3 };
+
+
+  protected:
+
+    bool fIsValid;
+    int fIsProtectedInt;
+
+  private:
+    int fFeet; // Usually 2 or 4.
+    bool fIsPrivateBool;
+
+  }; // moose
+
+  int two_prototypes();
+  int two_prototypes();
+
+  class quadruped {
+  public:
+    quadruped(int a) : fQuadPrivate(a)
+    { }
+
+    int fQuadPublic;
+
+  protected:
+    int fQuadProtected;
+
+  private:
+    int fQuadPrivate;
+
+  };
+
+}
+
+
+namespace deer {
+
+  class moose : public animal::moose {
+  public:
+    moose() : fAntlers(false)
+    { }
+
+    void setAntlers(bool);
+    bool getAntlers();
+
+    void doSomething();
+
+  protected:
+
+    bool fSomeField;
+
+  private:
+    bool fAntlers;
+
+  };
+
+} // deer
+
+// A second namespace of the same name will test the
+// namespace merging needed to resolve deer::alces
+namespace deer {
+
+  class alces : public animal::moose {
+  public:
+    alces(int lat) : fLatin(lat)
+    { }
+
+    void setLatin(bool);
+    bool getLatin();
+
+    void doLatinStuff(moose moosein); // for completion testing
+
+    moose createMoose(); // for completion testing.
+
+  protected:
+    bool fAlcesBool;
+    int fAlcesInt;
+
+  private:
+    bool fLatin;
+    int fGreek;
+  };
+
+};
+
+// A third namespace with classes that does protected and private inheritance.
+namespace sneaky {
+
+  class antelope : public animal::quadruped {
+
+  public:
+    antelope(int a) : animal::quadruped(),
+		      fAntyProtected(a)
+    {}
+
+    int fAntyPublic;
+
+    bool testAccess();
+
+  protected:
+    int fAntyProtected;
+
+  private :
+    int fAntyPrivate;
+
+  };
+
+  class jackalope : protected animal::quadruped {
+
+  public:
+    jackalope(int a) : animal::quadruped(),
+		       fBunny(a)
+    {}
+
+    int fBunnyPublic;
+
+    bool testAccess();
+
+  protected:
+    bool fBunnyProtected;
+
+  private :
+    bool fBunnyPrivate;
+
+  };
+
+  // Nothing specified means private.
+  class bugalope : /* private*/  animal::quadruped {
+
+  public:
+    bugalope(int a) : animal::quadruped(),
+		       fBug(a)
+    {}
+
+    int fBugPublic;
+
+    bool testAccess();
+  protected:
+    bool fBugProtected;
+
+  private :
+    bool fBugPrivate;
+
+  };
+
+
+};
+
+#endif