how copy from one stringstream object to another in C++?

Question

I have std::stringstream object ss1. Now, I would like to create another copy from this one.

I try this:

std::stringstream ss2 = ss1; 

or:

std::stringstream ss2(ss1) 

neither works

The error message is like this:

std::ios::basic_ios(const std::ios &) is not accessible from bsl::basic_stringstream, bsl::allocator>::basic_stringstream(const bsl::basic_stringstream, bsl::allocator>&).

Answer 1

Indeed, streams are non-copyable (though they are movable).

Depending on your usage, the following works quite well:

#include <iostream> #include <sstream>  int main() {     std::stringstream ss1;     ss1 << "some " << 123 << " stuff" << std::flush;      std::stringstream ss2;     ss2 << ss1.rdbuf(); // copy everything inside ss1's buffer to ss2's buffer      std::cout << ss1.str() << std::endl;     std::cout << ss2.str() << std::endl; } 

Output:

some 123 stuff
some 123 stuff