On: Bend: a high-level language that runs on GPUs (via...

[developedby]

The first `fork` is from using bend and passing the initial state

  The program above will initialize a state (`x = 0`), and then, for as long as `x < 3`,
  it will "fork" that state in two, creating a `Tree/Node`, and continuing with `x + 1`.
  When `x >= 3`, it will halt and return a `Tree/Leaf` with `7`.
  When all is done, the result will be assigned to the `tree` variable:

[anentropic → developedby]

I would have described the logic in the exact same way, but I still don't see where initial tree = fork(0) state comes from

all the other "fork"s in the output are produced explicitly by:

    Tree/Node { lft: fork(x + 1), rgt: fork(x + 1) }

[anentropic → anentropic]

well, it seems fork is some kind of builtin function that is intimately related to the bend construct: https://github.com/HigherOrderCO/bend/blob/main/FEATURES.md#....

so presumably the initial fork(0) state is implicitly produced by the bend