Support generators

[jtenner]

This sort of feature would help us develop features like Array.prototype.entries, Array.prototype.values, and other features that require generators.

For instance:

class Array<T> {
  *values(): Iterator<T> {
    var length = this.length_;
    for (let i = 0; i < length; i++) {
      yield this.__unchecked_get(i);
    }
  }
}

[MaxGraey]

I will collect and share helpful articles about generators here:

1. https://mapping-high-level-constructs-to-llvm-ir.readthedocs.io/en/latest/advanced-constructs/generators.html

[leeho0108]

Years passed, Is there any plan/news for this?