Re: [Boost-users] newbie - boost::shared_ptr of type stringstream using << operator?

From: Ed Johnson (ed_at_[hidden])
Date: 2006-05-15 14:17:22

Sebastian Redl wrote:
> Ed Johnson wrote:
> 
>> Hi,
>>
>>  Is it possible to use shared_ptr to manage stringstreams, and still 
>> use the << operator on the stringstream?
>>  
>>
> You're doing it. The only problem with this code is a misunderstanding 
> of how the stringstream constructor works.
> 
> Sebastian Redl

Thanks, I see where I was not using the correct constructor before.
However, even when I use the proper one, I get the same results. I 
cannot get the '<<' operator to append to the original string that I 
pass using the stringstream constructor. It still begins at the first 
character and begins overwriting the string.

//constructor syntax
explicit stringstream ( openmode mode = in | out  );
explicit stringstream ( const string & str, openmode mode = in | out );

//updated code
boost::shared_ptr< std::stringstream > sharedStream(new 		 
std::stringstream("hello world", std::stringstream::out));

Is there something else I'm missing?

Thanks,

Ed