For generators are eager in values, but should be lazy

[bioball]

x = new {
  ["one"] = 1
  ["two"] = this["one"] + 1
}

y = (x) {
  for (k, v in x) {
    [k] = v + 1
  }
}

Here, y["two"] should be 4, not 3.

for (v in x) {} should iterate over lazy values, and for (k, v in x) {} should iterate over eager keys and lazy values.

[odenix]

In my mind, lazy evaluation of v means that x[k] is only evaluated if and when v is accessed. However, this won't change the resulting value.

What you seem to be arguing for is some kind of macro expansion, i.e., replace every occurrence of v with the definition of x[k] rather than the value of x[k]. Why would this be desirable? At first sight it seems impossible to comprehend.