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Message-ID: <4A2CF3CD.70807@lexifi.com>
Date: Mon, 08 Jun 2009 13:19:41 +0200
From: Alain Frisch <alain.frisch@lexifi.com>
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To: caml-list <caml-list@inria.fr>
Subject: Behavior of %F
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X-Spam: no; 0.00; frisch:01 frisch:01 lexifi:01 printf:01 ocaml:01 printf:01 sprintf:01 ocaml:01 sprintf:01 camlcvs:01 cvsweb:01 stdlib:01 intentional:01 syntax:01 alain:01 

Hello,

The behavior of Printf w.r.t. %F changed recently.

Before (OCaml 3.10.0, and presumably 3.11.0):

# Printf.sprintf "%F" 1.;;
- : string = "1."


Now (OCaml 3.11.1+rc1):

# Printf.sprintf "%F" 1.;;
- : string = "1.000000"


This change comes from:

http://camlcvs.inria.fr/cgi-bin/cvsweb/ocaml/stdlib/printf.ml.diff?r1=1.58.2.1;r2=1.58.2.2;f=h


Is the new behavior intentional? The manual says:

========
F: convert a floating-point argument to Caml syntax (dddd.  or dddd.ddd 
or d.ddd e+-dd).
========

but it seems the new implementation never produces the form dddd.


-- Alain