* src/tgba/bddprint.cc, src/tgba/bddprint.hh,

src/tgba/dictunion.hh, src/tgba/ltl2tgba.cc, src/tgba/ltl2tgba.hh,
src/tgba/tgbabddconcretefactory.hh,
src/tgba/tgbabddconcreteproduct.cc,
src/tgba/tgbabddconcreteproduct.hh, src/tgba/tgbabddfactory.hh,
src/tgba/tgbabddtranslatefactory.hh, src/tgbaalgos/dotty.cc:
Add Doxygen comments.

src/tgba/bddprint.hh

@@ -9,13 +9,29 @@
 namespace spot
 {
 
+  /// \brief Print a BDD as a set.
+  /// \param os The output stream.
+  /// \param dict The dictionary to use, to lookup variables.
+  /// \param b The BDD to print. 
   std::ostream& bdd_print_set(std::ostream& os,
 			      const tgba_bdd_dict& dict, bdd b);
+  /// \brief Format a BDD as a set.
+  /// \param dict The dictionary to use, to lookup variables.
+  /// \param b The BDD to print. 
+  /// \return The BDD formated as a string.
   std::string bdd_format_set(const tgba_bdd_dict& dict, bdd b);
 
+  /// \brief Print a BDD as a diagram in dotty format.
+  /// \param os The output stream.
+  /// \param dict The dictionary to use, to lookup variables.
+  /// \param b The BDD to print. 
   std::ostream& bdd_print_dot(std::ostream& os,
 			      const tgba_bdd_dict& dict, bdd b);
 
+  /// \brief Print a BDD as a table.
+  /// \param os The output stream.
+  /// \param dict The dictionary to use, to lookup variables.
+  /// \param b The BDD to print. 
   std::ostream& bdd_print_table(std::ostream& os,
 				const tgba_bdd_dict& dict, bdd b);