[boost] [coroutine] interface suggestion

I forgot a suggestion made by Vicente: 5.a coroutine<>::caller_t provides function bind() which must be called after coroutine::caller_t::yield() returned in order to get the parameters int f( caller_t & c, strg & s, int x) { c.yield( 7); // alternative c( 7) c.bind( s, x); // s and x will contain new values given by caller } alternative: because the user could forget to invoke bind(): int f( caller_t & c, strg & s, int x) { c.yield( 7, s, x); // alternative c( 7, s ,x) } Oliver