Re: [Caml-list] is there a way for turning strings to "format"s?

["\"Mark Adams\"" <mark@proof-technologies.com>]

There's always the nasty 'Obj.magic' for conversion between arbitrary types:

    let computed_format = Printf.sprintf "%%0%dd" 5 in
    Printf.printf (Obj.magic computed_format) 42

Surely there must be a nicer way of doing this, but I don't know of one.

Mark.

on 6/11/13 12:40 PM, Matej Kosik <5764c029b688c1c0d24a2e97cd764f@gmail.com>
wrote:

> Hi,
>
> I would like to ask, how to do something like:
>
> let computed_format = Printf.sprintf "%%0%dd" 5 in
> Printf.printf computed_format 42
>
> The above code is rejected, because "computed_format" is of type "string"
> whereas
>
> ('a -> 'b, out_channel, unit) format =
> ('a -> 'b, out_channel, unit, unit, unit, unit) format6
>
> type was expected.
>
> My question is: is it possible to turn strings to values that would be
> accepted by Printf.printf as its first parameter?
>
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