* src/tgbaalgos/emptiness.hh, src/tgbaalgos/emptiness.cc

(emptiness_check_instantiator): New class.
* src/misc/optionmap.hh (set (const option_map&)): New method.
* src/tgbatest/randtgba.cc: Create every emptiness check via
emptiness_check_instantiator.

src/misc/optionmap.cc

@@ -134,6 +134,14 @@ namespace spot
     return old;
   }
 
+  void
+  option_map::set(const option_map& o)
+  {
+    for (std::map<std::string, int>::const_iterator it = o.options_.begin();
+	 it != o.options_.end(); ++it)
+      options_[it->first] = it->second;
+  }
+
   int&
   option_map::operator[](const char* option)
   {

src/misc/optionmap.hh

@@ -70,6 +70,9 @@ namespace spot
     /// or \a def otherwise.
     int set(const char* option, int val, int def = 0);
 
+    /// Acquire all the settings of \a o.
+    void set(const option_map& o);
+
     /// \brief Get a reference to the current value of \a option.
     int& operator[](const char* option);