Re: [Boost-users] [iostreams] How can I use the Stream Insertion operator (<<) with a filtering_streambuf?

Subject: Re: [Boost-users] [iostreams] How can I use the Stream Insertion operator (<<) with a filtering_streambuf?
From: Larry Evans (cppljevans_at_[hidden])
Date: 2013-07-25 23:22:07

On 07/25/13 19:37, Stephen Greenfield wrote:
> Partially asked in another question, but so far unanswered:  Once I create
> a
> filtering_streambuf that is connected to the zlib_compressor() and the
> output file,
> how do I then construct an object that can accept data from the Stream
> Insertion Operator?
> 
> 
> void CompressUsingFilteringStreambuf()
> {            
>     std::ofstream myFile("hello.z", std::ios_base::out |
> std::ios_base::binary);
> 
>     boost::iostreams::filtering_streambuf<boost::iostreams::output> out;
>     out.push(boost::iostreams::zlib_compressor());
>     out.push(myFile);
> 
>         // MY QUESTION:  How can I use the "stream insertion" operator
> (<<) 
>         // to go through the filtering_streambuf
>         // and place compressed text into myFile?
> 
>         // HOW DO I CREATE someStream?
>         someStream << "text I want to be compressed and end up in the
Instead of someStream, try myFile, and see if the resulting hello.z
is what you want.
> file...";
> 
>         myFile.close();
> }
> 
> I have scoured the documentation and the web looking for the answer -- and
> come up empty.
> 
> Stephen
>