Re: [Boost-users] Re: Format Library - Asterisk Support

From: Caleb Epstein (caleb.epstein_at_[hidden])
Date: 2004-10-21 12:26:15

On Thu, 21 Oct 2004 04:47:01 -0400, Miro Jurisic <macdev_at_[hidden]> wrote:
> In article <OFED98622A.E7230120-ONCA256F34.002B3C63_at_[hidden]>,
>  "Barak Simon" <barak.simon_at_[hidden]> wrote:
> 
> > I have noticed that the format library does not support at present the printf
> > asterisk for providing dynamic width as an extra parameter.
> > Unfortunately my users need to use this widely and I would really hate to
> > revert back to a non-typesafe solution.
> 
> A typesafe solution is to use  "format ("%1%") % string(buf, len)" if I understand the question correctly.

That would only work for string types.  The * width specifier can be
used with ANY type, e.g.:

    printf ("|%*d|", 6, 42);

Yields "|    42|".

-- 
Caleb Epstein
caleb.epstein_at_[hidden]