[boost] Re: indentation on streams

From: Daryle Walker (dwalker07_at_[hidden])
Date: 2003-04-23 03:18:51

On Tuesday, April 22, 2003, at 1:24 PM, Reece Dunn wrote:

>> Hi Reece,
>> I looked at it.
>> I do like your solution better. Did you submit it for a formal review?
>
> Not yet. How do I go about doing this?
>
>> However, what do you think of my proposal?
>
> I have not had chance to look at it yet. I am also interested in
> logging/tracing libraries and have used my indentation code in a basic 
> trace
> facility of my own.
>
>> What I want is something as transparent as possible, since usually 
>> streams
>> are passed as std::ostream& arguments.
>
> My code does not allow for you to pass a std::ostream & to the 
> constructor,
> using something like:
>
>    // will *not* work
>    boost::indentor< std::ostream > ind( os );
>
> In order to get this to work, I would need to add a constructor to 
> indentor
> that will accept a reference to a std::ostream, or std::basic_stream 
> and
> pass that to the parent class.
>
> It would also need a stream wrapper class, one that takes a stream 
> reference
> and provides a stream-like interface to it.
>
> Then, you could do something like:
>
>    boost::indentor
>    <
>       boost::ostream_wrapper< std::ostream >
>> ind( os ); // not supported yet
>
> Is there a set of classes of the form
>    [i/o/io]stream_wrapper
> available in boost?
>
I just had some classes that wrap a streambuf into a stream reviewed.  
(I'm still working on the issues brought up in that review).

This reminds me: you guys are taking the approach of modifying streams; 
is that a good idea?  I seen a similar class (by Dietmar Kuehl) that 
worked on the stream-buffer level.  The stream classes aren't that 
customizable, but the stream-buffer classes are.

Daryle