std::istrstream:: rdbuf

From cppreference.com

strstreambuf * rdbuf ( ) const ;
(deprecated in C++98)
(removed in C++26)

Returns a pointer to the associated std:: strstreambuf , casting away its constness (despite the const qualifier on the member function).

Parameters

(none)

Return value

Pointer to the associated std:: strstreambuf , with constness cast away.

Example

#include <strstream>
 
int main()
{
    const std::istrstream buf("example");
    std::strstreambuf* ptr = buf.rdbuf();
}