[Caml-list] install_printer

[Ian Zimmerman <itz@speakeasy.org>]

Hi, I can hook into the toplevel loop to modify printing of simple
types like int with #install_printer, but what about polymorphic
types?  Say I want the toplevel to do this:

# [1; 2] ;;
- : int list = List (1, 2)

so I started to write my printer function:

let list_printer ppf l =
  pp_open_box ppf 6;	(* if break needed, indent to the paren *)
  pp_print_string ppf "List (";
  
  (* now what??? *)
  
Basically, I am looking for a hook into the toploop that I can _call_
(not modify) to make it print a value (of any type) according to its
current printers.  Is that possible?

-- 
Ian Zimmerman, Oakland, California, U.S.A.
GPG: 433BA087  9C0F 194F 203A 63F7 B1B8  6E5A 8CA3 27DB 433B A087
In his own soul a man bears the source
from which he draws all his sorrows and his joys.
Sophocles.
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