std::strstream::~strstream

From cppreference.com
< cpplrm; | iolrm; | strstream
virtual ~strstream();

Destroys a std::strstream object, which also destroys the member std::strstreambuf, which may call the deallocation function if the underlying buffer was dynamically-allocated and not frozen.

Parameters

(none)

Notes

If str() was called on a dynamic strstream and freeze(false) was not called after that, this destructor leaks memory.

Example

#include <strstream>
#include <iostream>

int main()
{
    {
        std::ostrstream s; // dynamic buffer 
        s << 1.23 << std::ends;
        std::cout << s.str() << '\n';
        s.freeze(false);
    } // destructor called, buffer deallocated 

    {
        std::ostrstream s;
        s << 1.23 << std::ends;
        std::cout << s.str() << '\n';
//        buf.freeze(false);
    } // destructor called, memory leaked

    {
        std::istrstream s("1.23"); // constant buffer
        double d;
        s >> d;
        std::cout << d << '\n';
    } // destructor called, nothing to deallocate
}

Output:

1.23
1.23
1.23