[Caml-list] Lwt idioms: iterating

[Ivan Gotovchits <ivg@ieee.org>]

What is a best practice to implement a common iterative operations with
Lwt?

For example, I have a data structure incapsulating some
collection. Interface of the structure includes some iterators, i.e.

  val iter (e -> unit) -> t -> unit

  
Now, I would like to output each element of type e using one of the
functions from Lwt_io module. 

I see two solutions and neither I like:

1. Use Buffer.t to accumulate text while iterating, then output it.

2. Use Lwt_stream.t for the same purpose.

Both solutions a rather imperative and too ad-hoc (not scales to other
iterators and tasks). 

Are there any idiomatic solutions for such common tasks in Lwt?

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