source: tests/generator/suspend_then.cfa @ c8238c0

//
// Cforall Version 1.0.0 Copyright (C) 2019 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// suspend_then.cfa --
//
// Author           : Peter A. Buhr
// Created On       : Mon Apr 29 12:01:35 2019
// Last Modified By : Peter A. Buhr
// Last Modified On : Thu Jun 10 21:55:51 2021
// Update Count     : 1
//

#include <fstream.hfa>

generator Fibonacci {
        int fn1, fn2;                                                           // retained between resumes
        int fn;                                                                 // used for communication
};

void main( Fibonacci & fib ) with( fib ) {                              // called on first resume
        fn = 0;  fn1 = fn;                                                      // 1st case
        suspend { sout | "Then!"; }                                             // restart last resume
        fn = 1;  fn2 = fn1;  fn1 = fn;                                  // 2nd case
        suspend { sout | "Then!"; }                                             // restart last resume
        for () {
                fn = fn1 + fn2;  fn2 = fn1;  fn1 = fn;                  // general case
                suspend { sout | "Then!"; }                                     // restart last resume
        } // for
}

int next( Fibonacci & fib ) with( fib ) {
        resume( fib );                                                          // restart last suspend
        return fn;
}

int main() {
        Fibonacci f1, f2;
        for ( 10 ) {                                                            // print N Fibonacci values
                int v1 = next( f1 );
                int v2 = next( f2 );
                sout | v1 | v2;
        } // for
}

// Local Variables: //
// tab-width: 4 //
// compile-command: "cfa runningTotal.cfa" //
// End: //