[Caml-list] Re: A question about Format boxes

[Hongbo Zhang <bobzhang1988@gmail.com>]

Hi, I think he is trying to explain the difference:

let s = "--------------------------" in Format.fprintf 
Format.std_formatter "@[<hov1>(%s@[<hov1>(%s@[<hov1>(%s@,)@]@,)@]@,)@]" 
s s s;;
let s = "--------------------------" in Format.fprintf 
Format.std_formatter "@[<hov1>(%s@[<hov1>(%s@[<hov1>(%s@,)@]@,)@]@,)@]" 
s s s;;
(--------------------------(--------------------------(--------------------------
                                                        )))- : unit = ()
# let s = "--------------------------" in Format.fprintf 
Format.std_formatter "@[<1>(%s@[<1>(%s@[<1>(%s@,)@]@,)@]@,)@]" s s s;;
let s = "--------------------------" in Format.fprintf 
Format.std_formatter "@[<1>(%s@[<1>(%s@[<1>(%s@,)@]@,)@]@,)@]" s s s;;
(--------------------------(--------------------------(--------------------------
                                                        )
                             )
  )- : unit = ()

HTH
On 9/13/12 11:00 AM, Michael Welsh Duggan wrote:
> The example at
> <URL:http://caml.inria.fr/resources/doc/guides/format.en.html#hov-boxes>
> shows a major difference in the output of packing versus structural hov
> boxes.  However, in my experiments I cannot achieve the output this
> example assigns to "packing" boxes.  (OCaml 3.12)
>
> My examples from the REPL are below.  Would someone be able to tell me
> what I am doing incorrectly?
>
> # Format.printf "@[<hv 2>(---@\n@[<hv 2>(---@\n@[<hv 2>(---@,)@]@,)@]@,)@]@\n";;
> (---
>    (---
>      (---)))
> - : unit = ()
> # Format.printf "@[<hov 2>(---@\n@[<hov 2>(---@\n@[<hov 2>(---@,)@]@,)@]@,)@]@\n";;
> (---
>    (---
>      (---)))
> - : unit = ()
> # Format.printf "@[<2>(---@\n@[<2>(---@\n@[<2>(---@,)@]@,)@]@,)@]@\n";;
> (---
>    (---
>      (---)))
> - : unit = ()
> # Format.printf "@[<b 2>(---@\n@[<b 2>(---@\n@[<b 2>(---@,)@]@,)@]@,)@]@\n";;
> (---
>    (---
>      (---)))
> - : unit = ()
>
>