Re: [Caml-list] printf hook

[Jean-Christophe Filliatre <filliatr@lri.fr>]

Nicolas Cannasse writes:
 > Hi list !
 > I would like do to something like this :
 > 
 > let sprint msg =
 >     print_endline ("BEGIN: "^(sprintf msg))
 > 
 > without of course loosing the ability of having variable number of
 > parameters in my "msg".
 > Is that kind of thing possible ?

You can do the following :

======================================================================
# open Printf;;
# let print x = printf "BEGIN: "; printf x;;               
======================================================================

but this function still expects a format as first argument :

======================================================================
# print "foo\n";;
BEGIN: foo
- : unit = ()
# print "foo = %d\n" 2;;
BEGIN: foo = 2
- : unit = ()
# print "foo = %d * %d\n" 2 3;;
BEGIN: foo = 2 * 3
- : unit = ()
======================================================================

-- 
Jean-Christophe 

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