RE: [boost] Re: boost::iostreams: only with std::cout?

From: Dirk Griffioen (dirkgriffioen_at_[hidden])
Date: 2005-03-23 07:16:28

Hi Jonathan,

Thanks for helping me out!!

I've tried your proposition below and it does the trick, even with
actual encryption going on:

out << "test" << std::endl; //this works
//out << "test" << "\n"; //this does not

One remark: he code above works on my vc71 debug setup (cl called
through bjam v2 build v10), but if I read your earlier mail correctly it
should be the other way around and hang as well?

One question: is this behaviour intended?

I will try some more stuff (with some other containers , the copy/adapt
etc) and source/sink - apart from encryption I am in need of a audio
source/sink. 

I'll let you know :) - It's great stuff!

Cheers, Dirk

(Sorry the code didn't compile, forgot to match the filter names).

(And what do you mean by 'red herring' ? :)

-----Original Message-----
From: boost-bounces_at_[hidden]
[mailto:boost-bounces_at_[hidden]] On Behalf Of Jonathan Turkanis
Sent: Tuesday 22 March 2005 22:32
To: boost_at_[hidden]
Subject: [boost] Re: boost::iostreams: only with std::cout?

Dirk Griffioen wrote:

> I would love to use the boost::iostreams lib, so I created a filter
> (which, in this case, does encryption)
>
> but instead of passing it std::cout I would like to pass it some other
> stream, a stringstream for instance (or any kind of ostream/istream,
> depending on the direction).

> However, I was very surprised to find the following code taking 100%
> cpu and not returning. It probably means I did something wrong, but I
> can't seem to find it.

Here's a cleaned up example that reproduces the bug (when endl is
replaces by
"\n"). It seems the filter is a red herring.

Jonathan

#include <iostream>
#include <sstream>
#include <boost/iostreams/filtering_stream.hpp>

int main()
{
    boost::iostreams::filtering_ostream out;
    std::ostringstream os;
    out.push(os);
    out << "test" << std::endl;
    //out << "test" << "\n";
    std::cout << os.str();
}

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