Generator Functions

[BobVarioa]

This is likely incredibly far future, but I really only see one way to implement this with Porffor's current architecture, and without other proposals.

Passing in a program counter argument and having lots of tests for it, essentially implementing our own jump semantics

function* gen() {
 console.log("a");
 yield;
 console.log("b");
 return "done";
}
// =>
function gen(pc) {
  if (pc == 0) { console.log("a"); pc++ }
  if (pc == 1) { pc++; return [undefined, pc] }
  if (pc == 2) { console.log("b"); pc++; }
  if (pc == 3) {
    return ["done", pc];
  } 
}

The AssemblyScript developers have an open issue for it, but it seems like there hasn't been much progress there.

It does look like there's a relevant WASM proposal, but it doesn't have good engine support yet.