gistfile1.txt

// so this is a typical implicit-continuation function
// as we know it from many languages:

function myfunc (f) {
    f(2);
    return 3;
}

// but this is how that function looks internally,
// with explicit control flow, invisible variables
// put in diamond brackets:

function myfunc (f, <return>) {
    // we pass a continuation (effectively a callback) to f...
    f(2,
      function (x) {
          // ...in which we call <return> to get out of it
          <return>(3);
          // if we had never called <return>, the program
          // would have ended here, because the interpreter
          // does not maintain a function stack.
      });
}