duktape/ecmascript-testcases/test-dev-coroutine-basic.js

/*---
{
    "custom": true
}
---*/

/*===
resume tests
yielder starting
yielder arg: foo
yielded with 1
resumed with bar
yielded with 2
resumed with quux
yielded with 3
resumed with baz
yielder ending
yielded with 123
finished
===*/

function yielder(x) {
    var yield = __duk__.yield;

    print('yielder starting');
    print('yielder arg:', x);

    print('resumed with', yield(1));
    print('resumed with', yield(2));
    print('resumed with', yield(3));

    print('yielder ending');
    return 123;
}

var t = __duk__.spawn(yielder);

print('resume tests');
print('yielded with', __duk__.resume(t, 'foo'));
print('yielded with', __duk__.resume(t, 'bar'));
print('yielded with', __duk__.resume(t, 'quux'));
print('yielded with', __duk__.resume(t, 'baz'));

print('finished');