source: doc/papers/concurrency/examples/Format.cc@ cc28153d

_Coroutine Format {
        char ch; // used for communication
        int g, b; // global because used in destructor
        void main() {
                for ( ;; ) { // for as many characters
                        for ( g = 0; g < 5; g += 1 ) { // groups of 5 blocks
                                for ( b = 0; b < 4; b += 1 ) { // blocks of 4 characters
                                        for ( ;; ) { // for newline characters
                                                suspend();
                                                if ( ch != '\n' ) break; // ignore newline
                                        }
//                                      cout << ch; // print character
                                }
//                              cout << " "; // print block separator
                        }
//                      cout << endl; // print group separator
                }
        }
  public:
        Format() { resume(); } // start coroutine
//      ~Format() { if ( g != 0 | | b != 0 ) cout << endl; }
        void prt( char ch ) { Format::ch = ch; resume(); }
};

int main() {
        Format fmt;
        for ( long int i = 0; i < 1000000000; i += 1 )
                fmt.prt( 'a' );
}

// Local Variables: //
// tab-width: 4 //
// compile-command: "u++-work -O2 -nodebug Format.cc" //
// End: //