// instantiate all of the components we need
signals::storage<void ()> banger;
signals::storage<void (float)> floater(2.5f);
signals::storage<void (float)> collector(0.0f);
        
// ---Connect the dataflow network -----------------------------
//
// ,--------.  void()   
// | banger | -------. 
// `--------'        |
//                   |
//                   V
//            ,-(send_slot)-.  void(float)   ,-----------.
//            |   floater   | -------------> | collector |
//            `-------------'                `-----------'
//
// -------------------------------------------------------------

banger >>= floater.send_slot();
floater >>= collector;

// signal from banger is will invoke floater.send(), which causes
// floater to output 2.5
banger();
BOOST_CHECK_EQUAL(floater.at<0>(), 2.5f);
BOOST_CHECK_EQUAL(collector.at<0>(), 2.5f);

floater.close();
floater(1.5f); // change the value in floater
// we can also signal floater directly, which will again cause it to 
// output its stored value:
invoke(floater); 
BOOST_CHECK_EQUAL(collector.at<0>(), 1.5f);