"Giampiero Gabbiani" <giampiero_gabbiani@tin.it> wrote in message news:pan.2003.10.19.17.15.26.3702@tin.it...

Is it possible to reset a std::stringstream in order to reuse it once more?
I tried with flush() method without any success...

Just set the string via the str(const string&) method (to either an empty string or
one with new data as appropriate for what you are doing).

Giampiero Gabbiani wrote:

Is it possible to reset a std::stringstream in order to reuse it once
more? I tried with flush() method without any success...

Have you tried seeking to the beinning?

Giampiero Gabbiani wrote:

Is it possible to reset a std::stringstream in order to reuse it once more?
I tried with flush() method without any success...
Thanks in advance
Giampiero

The "str()" and "str( string )" methods should work.
However, on some platforms these may not work so you
may use the ugly reconstruct hack.


#include <sstream>
#include <iostream>

int main()
{

std::istringstream iss( "Hi there" );

std::ostringstream oss;

std::string foo;

iss >> foo;
oss << foo;

iss.str( "boo hoo" ); // Set the input to new string

iss >> foo;
oss << foo;
std::cout << oss.str() << "\n";

// Another way is to reconstruct the istringstream
// UGLY but some implementations have bugs and this is the
// only way.
iss.~istringstream();
new ( (void *) &iss ) std::istringstream( "Reconstruct this" );

oss.str( "" ); // reset the output string.

iss >> foo;
oss << foo;
std::cout << oss.str() << "\n";

// Another way is to reconstruct the ostringstream
oss.~ostringstream();
new ( (void *) &oss ) std::ostringstream;

iss >> foo;
oss << foo;
std::cout << oss.str() << "\n";

}