Hi,

No magic needed in OCaml:

  let with_open path f =
    let oc = open_out path in
    match f oc with
    | x -> close_out_noerr oc; x
    | exception e -> close_out_noerr oc; raise e

and then use it as

  with_open "foo" (fun oc -> output_string oc str)

Cheers

Nicolas

On Thu, Aug 6, 2015 at 11:40 AM, Goswin von Brederlow <goswin-v-b@web.de>
wrote:

> Hi,
>
> in Python one can write:
>
>     with open("foo") as fd:
>         fd.write(str)
>
> This involves some language magic that will open the file for the
> duration of the block and close it at the end. The file descriptor is
> automatically closed at a know time and not leaked or left until the
> GC gets around to cleaning it up.
>
> Has anyone constructed something like that for ocaml? Maybe with a ppx
> extension?
>
> MfG
>         Goswin
>
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