RE: [Caml-list] ocaml considered dangerous

[David Allsopp <dra-news@metastack.com>]

Does this new version fix positional specifiers? (http://caml.inria.fr/mantis/view.php?id=4204) or has that rather useful (if never working!) feature been consigned to history?

> -----Original Message-----
> From: caml-list-request@inria.fr [mailto:caml-list-request@inria.fr] On
> Behalf Of Gabriel Scherer
> Sent: 18 January 2014 07:05
> To: Jeremy Yallop
> Cc: Jon Harrop; Jacques Garrigue; OCaML List Mailing
> Subject: Re: [Caml-list] ocaml considered dangerous
> 
> I guess one could also mention that the no-magic implementation is notably
> faster than the current implementation (as it avoids any format string
> parsing at runtime), which is not necessarily a concern for printf (for
> large output you're probably killed by I/O overhead
> anyway) but can be for sprintf or bprintf.
> 
> Note that while the current proposal uses GADTs, Benoît also experimented
> with reasonable similar designs using higher-order function (this is the
> usual initial vs. final tagless interpreter
> choice) that would have been implementable before 4.00.
> 
> On Sat, Jan 18, 2014 at 3:22 AM, Jeremy Yallop <yallop@gmail.com> wrote:
> > Jacques Garrigue wrote:
> >>> By the way, there is now an implementation of Printf that avoids most
> of the Obj.magic by using GADTs. It should be merged soon.
> >
> > Jon Harrop <jon@ffconsultancy.com> wrote:
> >> Just curious: is that a drop-in replacement?
> >
> > Yes, except for some tiny incompatibilities, mostly fixes for bugs
> > that the development of the GADT version uncovered in the original
> > implementation.  The patch is here, along with a description and some
> > discussion:
> >
> >    http://caml.inria.fr/mantis/view.php?id=6017
> >
> > The author, Benoît Vaugon, presented the design along with some
> > performance figures at OCaml 2013:
> >
> >    http://ocaml.org/meetings/ocaml/2013/proposals/formats-as-gadts.pdf
> >    http://ocaml.org/meetings/ocaml/2013/slides/vaugon.pdf
> >
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