merge trunk@116587 skinning-7@119389 -> viewer-2.0.0-skinning-7

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diff --git a/indra/test/lldoubledispatch_tut.cpp b/indra/test/lldoubledispatch_tut.cpp
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+++ b/indra/test/lldoubledispatch_tut.cpp
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+/**
+ * @file   lldoubledispatch_tut.cpp
+ * @author Nat Goodspeed
+ * @date   2008-11-13
+ * @brief  Test for lldoubledispatch.h
+ *
+ * This program tests the DoubleDispatch class, using a variation on the example
+ * from Scott Meyers' "More Effective C++", Item 31.
+ *
+ * $LicenseInfo:firstyear=2008&license=viewergpl$
+ * 
+ * Copyright (c) 2008-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+// Precompiled header
+#include "linden_common.h"
+// associated header
+#include "lldoubledispatch.h"
+// STL headers
+// std headers
+#include <string>
+#include <iostream>
+#include <typeinfo>
+// external library headers
+// other Linden headers
+#include "lltut.h"
+
+
+/*---------------------------- Class hierarchy -----------------------------*/
+// All objects are GameObjects.
+class GameObject
+{
+public:
+    GameObject(const std::string& name): mName(name) {}
+    virtual ~GameObject() {}
+    virtual std::string stringize() { return std::string(typeid(*this).name()) + " " + mName; }
+
+protected:
+    std::string mName;
+};
+
+// SpaceStation, Asteroid and SpaceShip are peer GameObjects.
+struct SpaceStation: public GameObject
+{
+    SpaceStation(const std::string& name): GameObject(name) {}
+    // Only a dummy SpaceStation is constructed without a name
+    SpaceStation(): GameObject("dummy") {}
+};
+
+struct Asteroid: public GameObject
+{
+    Asteroid(const std::string& name): GameObject(name) {}
+    Asteroid(): GameObject("dummy") {}
+};
+
+struct SpaceShip: public GameObject
+{
+    SpaceShip(const std::string& name): GameObject(name) {}
+    SpaceShip(): GameObject("dummy") {}
+};
+
+// SpaceShip is specialized further into CommercialShip and MilitaryShip.
+struct CommercialShip: public SpaceShip
+{
+    CommercialShip(const std::string& name): SpaceShip(name) {}
+    CommercialShip(): SpaceShip("dummy") {}
+};
+
+struct MilitaryShip: public SpaceShip
+{
+    MilitaryShip(const std::string& name): SpaceShip(name) {}
+    MilitaryShip(): SpaceShip("dummy") {}
+};
+
+/*-------------------------- Collision functions ---------------------------*/
+// This mechanism permits us to overcome a limitation of Meyers' approach:  we
+// can declare the parameter types exactly as we want, rather than having to
+// make them all GameObject& parameters.
+std::string shipAsteroid(SpaceShip& ship, Asteroid& rock)
+{
+//  std::cout << rock.stringize() << " has pulverized " << ship.stringize() << std::endl;
+    return "shipAsteroid";
+}
+
+std::string militaryShipAsteroid(MilitaryShip& ship, Asteroid& rock)
+{
+//  std::cout << rock.stringize() << " has severely damaged " << ship.stringize() << std::endl;
+    return "militaryShipAsteroid";
+}
+
+std::string shipStation(SpaceShip& ship, SpaceStation& dock)
+{
+//  std::cout << ship.stringize() << " has docked at " << dock.stringize() << std::endl;
+    return "shipStation";
+}
+
+std::string asteroidStation(Asteroid& rock, SpaceStation& dock)
+{
+//  std::cout << rock.stringize() << " has damaged " << dock.stringize() << std::endl;
+    return "asteroidStation";
+}
+
+/*------------------------------- Test code --------------------------------*/
+namespace tut
+{
+    struct dispatch_data
+    {
+        dispatch_data():
+            home(new SpaceStation("Terra Station")),
+            obstacle(new Asteroid("Ganymede")),
+            tug(new CommercialShip("Pilotfish")),
+            patrol(new MilitaryShip("Enterprise"))
+        {}
+
+        // Instantiate and populate the DoubleDispatch object.
+        typedef LLDoubleDispatch<std::string, GameObject> DD;
+        DD dispatcher;
+
+        // Instantiate a few GameObjects.  Make sure we refer to them
+        // polymorphically, and don't let them leak.
+        std::auto_ptr<GameObject> home;
+        std::auto_ptr<GameObject> obstacle;
+        std::auto_ptr<GameObject> tug;
+        std::auto_ptr<GameObject> patrol;
+
+        // prototype objects
+        Asteroid dummyAsteroid;
+        SpaceShip dummyShip;
+        MilitaryShip dummyMilitary;
+        CommercialShip dummyCommercial;
+        SpaceStation dummyStation;
+    };
+    typedef test_group<dispatch_data> dispatch_group;
+    typedef dispatch_group::object dispatch_object;
+    tut::dispatch_group ddgr("double dispatch");
+
+    template<> template<>
+    void dispatch_object::test<1>()
+    {
+        // Describe param types using explicit DD::Type objects
+        // (order-sensitive add() variant)
+        dispatcher.add(DD::Type<SpaceShip>(), DD::Type<Asteroid>(), shipAsteroid, true);
+        // naive adding, won't work
+        dispatcher.add(DD::Type<MilitaryShip>(), DD::Type<Asteroid>(), militaryShipAsteroid, true);
+        dispatcher.add(DD::Type<SpaceShip>(), DD::Type<SpaceStation>(), shipStation, true);
+        dispatcher.add(DD::Type<Asteroid>(), DD::Type<SpaceStation>(), asteroidStation, true);
+
+        // Try colliding them.
+        ensure_equals(dispatcher(*home, *tug),        // reverse params, SpaceShip subclass
+                      "shipStation");
+        ensure_equals(dispatcher(*patrol, *home),     // forward params, SpaceShip subclass
+                      "shipStation");
+        ensure_equals(dispatcher(*obstacle, *home),   // forward params
+                      "asteroidStation");
+        ensure_equals(dispatcher(*home, *obstacle),   // reverse params
+                      "asteroidStation");
+        ensure_equals(dispatcher(*tug, *obstacle),    // forward params, SpaceShip subclass
+                      "shipAsteroid");
+        ensure_equals(dispatcher(*obstacle, *patrol), // reverse params, SpaceShip subclass
+                      // won't use militaryShipAsteroid() because it was added
+                      // in wrong order
+                      "shipAsteroid");
+    }
+
+    template<> template<>
+    void dispatch_object::test<2>()
+    {
+        // Describe param types using explicit DD::Type objects
+        // (order-sensitive add() variant)
+        // adding in correct order
+        dispatcher.add(DD::Type<MilitaryShip>(), DD::Type<Asteroid>(), militaryShipAsteroid, true);
+        dispatcher.add(DD::Type<SpaceShip>(), DD::Type<Asteroid>(), shipAsteroid, true);
+        dispatcher.add(DD::Type<SpaceShip>(), DD::Type<SpaceStation>(), shipStation, true);
+        dispatcher.add(DD::Type<Asteroid>(), DD::Type<SpaceStation>(), asteroidStation, true);
+        
+        ensure_equals(dispatcher(*patrol, *obstacle), "militaryShipAsteroid");
+        ensure_equals(dispatcher(*tug, *obstacle), "shipAsteroid");
+    }
+
+    template<> template<>
+    void dispatch_object::test<3>()
+    {
+        // Describe param types with actual prototype instances
+        // (order-insensitive add() variant)
+        dispatcher.add(dummyMilitary, dummyAsteroid, militaryShipAsteroid);
+        dispatcher.add(dummyShip, dummyAsteroid, shipAsteroid);
+        dispatcher.add(dummyShip, dummyStation, shipStation);
+        dispatcher.add(dummyAsteroid, dummyStation, asteroidStation);
+
+        ensure_equals(dispatcher(*patrol, *obstacle), "militaryShipAsteroid");
+        ensure_equals(dispatcher(*tug, *obstacle), "shipAsteroid");
+        ensure_equals(dispatcher(*obstacle, *patrol), "");
+    }
+
+    template<> template<>
+    void dispatch_object::test<4>()
+    {
+        // Describe param types with actual prototype instances
+        // (order-insensitive add() variant)
+        dispatcher.add(dummyShip, dummyAsteroid, shipAsteroid);
+        // Even if we add the militaryShipAsteroid in the wrong order, it
+        // should still work.
+        dispatcher.add(dummyMilitary, dummyAsteroid, militaryShipAsteroid);
+        dispatcher.add(dummyShip, dummyStation, shipStation);
+        dispatcher.add(dummyAsteroid, dummyStation, asteroidStation);
+
+        ensure_equals(dispatcher(*patrol, *obstacle), "militaryShipAsteroid");
+        ensure_equals(dispatcher(*tug, *obstacle), "shipAsteroid");
+    }
+
+    template<> template<>
+    void dispatch_object::test<5>()
+    {
+        dispatcher.add<SpaceShip, Asteroid>(shipAsteroid);
+        dispatcher.add<MilitaryShip, Asteroid>(militaryShipAsteroid);
+        dispatcher.add<SpaceShip, SpaceStation>(shipStation);
+        dispatcher.add<Asteroid, SpaceStation>(asteroidStation);
+
+        ensure_equals(dispatcher(*patrol, *obstacle), "militaryShipAsteroid");
+        ensure_equals(dispatcher(*tug, *obstacle), "shipAsteroid");
+    }
+} // namespace tut