Question

How can I get the length in bytes of a stringstream.

stringstream.str().length();

would copy the contents into std::string. I don’t want to make a copy.

Or if anyone can suggest another iostream that works in memory, can be passed off for writing to another ostream, and can get the size of it easily I’ll use that.

Answer 1

Assuming you’re talking about an ostringstream it looks like tellp might do what you want.