more final keywords

For #42.

* src/graph/graph.hh, src/ltlast/multop.hh, src/ltlenv/defaultenv.hh,
src/misc/tmpfile.hh, src/tgba/taatgba.hh, src/tgba/tgbagraph.hh,
src/tgba/tgbaproduct.hh, src/tgbaalgos/gtec/gtec.hh: Declare more
classes as final.

src/graph/graph.hh

@@ -145,7 +145,7 @@ namespace spot
     // one without.
 
     template <typename Transition, typename State_Data>
-    struct SPOT_API distate_storage: public State_Data
+    struct SPOT_API distate_storage final: public State_Data
     {
       Transition succ = 0; // First outgoing transition (used when iterating)
       Transition succ_tail = 0;	// Last outgoing transition (used for
@@ -168,7 +168,7 @@ namespace spot
 
     template <typename StateIn,
 	      typename StateOut, typename Transition, typename Trans_Data>
-    struct SPOT_API trans_storage: public Trans_Data
+    struct SPOT_API trans_storage final: public Trans_Data
     {
       typedef Transition transition;
 

src/ltlast/multop.hh

@@ -1,6 +1,6 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Laboratoire de
+// Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015 Laboratoire
-// Recherche et Développement de l'Epita (LRDE).
+// de Recherche et Développement de l'Epita (LRDE).
 // Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris
 // 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
 // Université Pierre et Marie Curie.
@@ -36,7 +36,7 @@ namespace spot
 
     /// \ingroup ltl_ast
     /// \brief Multi-operand operators.
-    class SPOT_API multop : public formula
+    class SPOT_API multop final: public formula
     {
     public:
       enum type { Or, OrRat, And, AndRat, AndNLM, Concat, Fusion };

src/ltlenv/defaultenv.hh

@@ -1,5 +1,6 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012, 2013, 2014 Laboratoire de Recherche et Développement
+// Copyright (C) 2012, 2013, 2014, 2015 Laboratoire de Recherche et
+// Développement
 // de l'Epita (LRDE).
 // Copyright (C) 2003, 2004, 2005  Laboratoire d'Informatique de Paris 6 (LIP6),
 // département Systèmes Répartis Coopératifs (SRC), Université Pierre
@@ -37,7 +38,7 @@ namespace spot
     ///
     /// This is a singleton.  Use default_environment::instance()
     /// to obtain the instance.
-    class SPOT_API default_environment : public environment
+    class SPOT_API default_environment final: public environment
     {
     public:
       virtual ~default_environment();

src/misc/tmpfile.hh

@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2013 Laboratoire de Recherche et Développement
+// Copyright (C) 2013, 2015 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -52,7 +52,7 @@ namespace spot
     typedef std::list<temporary_file*>::iterator cleanpos_t;
 
     SPOT_LOCAL temporary_file(char* name, cleanpos_t cp);
-    ~temporary_file();
+    virtual ~temporary_file() override;
 
     const char* name() const
     {
@@ -66,7 +66,7 @@ namespace spot
     }
 
     virtual void
-    print(std::ostream& os, const char*) const
+    print(std::ostream& os, const char*) const final override
     {
       os << this;
     }
@@ -83,11 +83,11 @@ namespace spot
   ///
   /// Use the open_temporary_file::close() method if you want to close
   /// that descriptor; do no call the POSIX close() function directly.
-  class SPOT_API open_temporary_file: public temporary_file
+  class SPOT_API open_temporary_file final: public temporary_file
   {
   public:
     SPOT_LOCAL open_temporary_file(char* name, cleanpos_t cp, int fd);
-    ~open_temporary_file();
+    virtual ~open_temporary_file() override;
 
     void close();
 

src/tgba/taatgba.hh

@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2009, 2011, 2012, 2013, 2014 Laboratoire de Recherche et
+// Copyright (C) 2009, 2011, 2012, 2013, 2014, 2015 Laboratoire de Recherche et
 // Développement de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -54,12 +54,13 @@ namespace spot
 
     /// TGBA interface.
     virtual ~taa_tgba();
-    virtual spot::state* get_init_state() const;
+    virtual spot::state* get_init_state() const final;
-    virtual tgba_succ_iterator* succ_iter(const spot::state* state) const;
+    virtual tgba_succ_iterator* succ_iter(const spot::state* state) const final;
     virtual std::string format_state(const spot::state* state) const = 0;
 
   protected:
-    virtual bdd compute_support_conditions(const spot::state* state) const;
+    virtual bdd compute_support_conditions(const spot::state* state)
+      const final;
 
     typedef std::vector<taa_tgba::state_set*> ss_vec;
 
@@ -76,7 +77,7 @@ namespace spot
   };
 
   /// Set of states deriving from spot::state.
-  class SPOT_API set_state : public spot::state
+  class SPOT_API set_state final: public spot::state
   {
   public:
     set_state(const taa_tgba::state_set* s, bool delete_me = false)
@@ -100,7 +101,7 @@ namespace spot
     bool delete_me_;
   };
 
-  class SPOT_API taa_succ_iterator : public tgba_succ_iterator
+  class SPOT_API taa_succ_iterator final: public tgba_succ_iterator
   {
   public:
     taa_succ_iterator(const taa_tgba::state_set* s, const acc_cond& acc);
@@ -305,7 +306,7 @@ namespace spot
     }
   };
 
-  class SPOT_API taa_tgba_string :
+  class SPOT_API taa_tgba_string final:
 #ifndef SWIG
     public taa_tgba_labelled<std::string>
 #else
@@ -329,7 +330,7 @@ namespace spot
     return std::make_shared<taa_tgba_string>(dict);
   }
 
-  class SPOT_API taa_tgba_formula :
+  class SPOT_API taa_tgba_formula final:
 #ifndef SWIG
     public taa_tgba_labelled<const ltl::formula*>
 #else

src/tgba/tgbagraph.hh

@@ -105,7 +105,8 @@ namespace spot
 
 
   template<class Graph>
-  class SPOT_API tgba_digraph_succ_iterator: public tgba_succ_iterator
+  class SPOT_API tgba_digraph_succ_iterator final:
+    public tgba_succ_iterator
   {
   private:
     typedef typename Graph::transition transition;
@@ -168,7 +169,7 @@ namespace spot
 
   };
 
-  class SPOT_API tgba_digraph: public tgba
+  class SPOT_API tgba_digraph final: public tgba
   {
   public:
     typedef digraph<tgba_graph_state, tgba_graph_trans_data> graph_t;

src/tgba/tgbaproduct.hh

@@ -33,7 +33,7 @@ namespace spot
   ///
   /// This state is in fact a pair of state: the state from the left
   /// automaton and that of the right.
-  class SPOT_API state_product : public state
+  class SPOT_API state_product final: public state
   {
   public:
     /// \brief Constructor
@@ -119,7 +119,7 @@ namespace spot
   };
 
   /// \brief A lazy product with different initial states.
-  class SPOT_API tgba_product_init: public tgba_product
+  class SPOT_API tgba_product_init final: public tgba_product
   {
   public:
     tgba_product_init(const const_tgba_ptr& left, const const_tgba_ptr& right,

src/tgbaalgos/gtec/gtec.hh

@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2008, 2013, 2014 Laboratoire de Recherche et
+// Copyright (C) 2008, 2013, 2014, 2015 Laboratoire de Recherche et
 // Développement de l'Epita (LRDE).
 // Copyright (C) 2003, 2004, 2005, 2006 Laboratoire d'Informatique de
 // Paris 6 (LIP6), département Systèmes Répartis Coopératifs (SRC),
@@ -184,7 +184,7 @@ namespace spot
   /// known states first.
   ///
   /// See the documentation for spot::couvreur99.
-  class SPOT_API couvreur99_check_shy : public couvreur99_check
+  class SPOT_API couvreur99_check_shy final: public couvreur99_check
   {
   public:
     couvreur99_check_shy(const const_tgba_ptr& a, option_map o = option_map());