* src/tgba/statebdd.hh (state_bdd::as_bdd): Add non-const variant.

* src/tgba/tgbabddtranslateproxy.cc,
src/tgba/tgbabddtranslateproxy.hh: New files.
* src/tgba/Makefile.am (libtgba_la_SOURCES): Add them.

src/tgba/tgbabddtranslateproxy.hh

@@ -0,0 +1,64 @@
+#ifndef SPOT_TGBA_TGBABDDTRANSLATEPROXY_HH
+# define SPOT_TGBA_TGBABDDTRANSLATEPROXY_HH
+
+#include "tgba.hh"
+#include "succiterconcrete.hh"
+
+namespace spot
+{
+  /// \brief Proxy for a spot::tgba_succ_iterator_concrete that renumber 
+  /// BDD variables on the fly.
+  class tgba_bdd_translate_proxy_succ_iterator: public tgba_succ_iterator
+  {
+  public:
+    tgba_bdd_translate_proxy_succ_iterator
+    (tgba_succ_iterator_concrete* it, bddPair* rewrite);
+
+    // iteration
+    void first();
+    void next();
+    bool done();
+
+    // inspection
+    state_bdd* current_state();
+    bdd current_condition();
+    bdd current_promise();
+  protected:
+    tgba_succ_iterator_concrete* iter_;
+    bddPair* rewrite_;
+  };
+
+
+  /// \brief Proxy for a spot::tgba_bdd_concrete that renumber BDD variables
+  /// on the fly.
+  class tgba_bdd_translate_proxy: public tgba
+  {
+  public:
+    /// \brief Construcor.
+    /// \param from The spot::tgba to masquerade.
+    /// \param to The new dictionary to use.
+    tgba_bdd_translate_proxy(const tgba& from, 
+			     const tgba_bdd_dict& to);
+
+    virtual ~tgba_bdd_translate_proxy();
+
+    virtual state_bdd* get_init_state() const;
+
+    virtual tgba_bdd_translate_proxy_succ_iterator* 
+    succ_iter(const state* state) const;
+
+    virtual const tgba_bdd_dict& get_dict() const;
+
+    virtual std::string
+    tgba_bdd_translate_proxy::format_state(const state* state) const;
+    
+  private:
+    const tgba& from_;		///< The spot::tgba to masquerade.
+    tgba_bdd_dict to_;		///< The new dictionar to use.
+    bddPair* rewrite_to_;	///< The rewriting pair for from->to.
+    bddPair* rewrite_from_;	///< The rewriting pair for to->from.
+  };
+  
+}
+
+#endif // SPOT_TGBA_TGBABDDTRANSLATEPROXY_HH