ostrstream problem

ostrstream problem

[Ernest L. Williams Jr.]

Hi,

I am now using gcc 4.0.1.

I get the following error:
====================================================
error: ‘ostrstream’ was not declared in this scope
===================================================


What header must I use to get ostrstream?

I tried : #include <sstream>

I am confused. 
Any help or reference is welcomed and appreciated.



Thanks,
Ernest L. Williams Jr.

Re: ostrstream problem

[Peter Doerfler]

Hi Ernest.

"strstream has been deprecated in the C++98 standard because the standards 
committee felt it was superseded by stringstream, which better encapsulates 
memory management. strstream is still an official part of the standard that 
conforming C++ implementers must provide."
[distilled from Herb Sutter's http://www.gotw.ca/publications/mill19.htm]

So you can either use ostringstream or include backward/strstream (found by 
grep). Note that I haven't checked if the ostrstream now in backward is the 
same that used to be in the general include directory in previous versions.

HTH, Peter


On Wednesday 28 September 2005 05:00, Ernest L. Williams Jr. wrote:
> Hi,
>
> I am now using gcc 4.0.1.
>
> I get the following error:
> ====================================================
> error: ‘ostrstream’ was not declared in this scope
> ===================================================
>
>
> What header must I use to get ostrstream?
>
> I tried : #include <sstream>
>
> I am confused.
> Any help or reference is welcomed and appreciated.
>
>
>
> Thanks,
> Ernest L. Williams Jr.

Re: ostrstream problem

[John Love-Jensen]

Hi Ernest,

I second what Peter said.

Plus....

You should be aware in switching from ostrstream to std::ostringstream...

std::ostringstream does the memory management for you.  You don't need to
trouble yourself with ostrstream's memory management burden.  That alone is
worth switching instead of trying to use the obsolete ostrstream!

std::ostringstream's backing store is a std::string, so you don't need the
ends terminator.

Sincerely,
--Eljay

Re: ostrstream problem

[Ernest L. Williams Jr.]

On Wed, 2005-09-28 at 07:20 -0500, John Love-Jensen wrote:
> Hi Ernest,
> 
> I second what Peter said.
> 
> Plus....
> 
> You should be aware in switching from ostrstream to std::ostringstream...
> 
> std::ostringstream does the memory management for you.  You don't need to
> trouble yourself with ostrstream's memory management burden.  That alone is
> worth switching instead of trying to use the obsolete ostrstream!
> 
> std::ostringstream's backing store is a std::string, so you don't need the
> ends terminator.

Awesome.  I will definitely be using std::ostringstream in the future.


Thanks,
Ernest


> 
> Sincerely,
> --Eljay
>