[Caml-list] printf arguments

[Henri Dubois-Ferriere <henridf@lcavsun1.epfl.ch>]

In trying to write a wrapper around printf for debug message logging, 
(a la syslog), I am coming across the following problem:

# let myprintf fmt = if (true) then Printf.fprintf stdout fmt;;
val myprintf : (unit, out_channel, unit) format -> unit = <fun>

# Printf.fprintf;;
- : out_channel -> ('a, out_channel, unit) format -> 'a = <fun>


so the myprintf function above does not have the same type as the original 
fprintf. Note that removing the if clause returns us to the proper type:

# let myprintf fmt = Printf.fprintf stdout fmt;;
val myprintf : ('a, out_channel, unit) format -> 'a = <fun>



Any clue why this is so, and how to get around it?

Thanks,

Henri

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