Question

Possible Duplicate:
How to force std::stringstream operator >> to read an entire string?

I am trying to convert a structure to a string, similar to how toString() would work for an object in Java or C++. To do this I am writing my formatted data to a std::stringstream then write that to a std::string.

Here is what I have:

std::stringstream ss;
std::string       packet;

ss <<  "Packet Length: " << p->header->len
   << " (" << p->header->caplen << ")" << std::endl
   << "Collected: " <<  timedate << "."
   << std::dec << p->header->ts_usecs << std::endl
   << "Eth:\tFrom: " << to_address(p->from) << std::endl
   <<     "\tTo:   " << to_address(p->to)  << std::endl
   <<     "\tType: " << to_hex(p->type, false)
   << " (" << p->type_name << ")" << std::endl;

But for some reason when I write this stream into the std::string packet:

ss >> packet;

and then print the value of packet:

cout << "Packet X " << packet << endl;

I only see the text "Packet" and nothing else.

Is there something obvious I am missing here?

Answer 1

Instead of reading a string back, you should get the value using the stringstream ::str member:

string p = ss.str();

Otherwise, the reading follows the usual pattern of treating spaces as separators.