std::strstream::~strstream - cppreference.com

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# std::strstream::~strstream

From cppreference.com
< cpp‎ | io‎ | 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.

### [edit] Parameters

(none)

### [edit] Notes

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

### [edit] Example

Run this code

    #include <strstream>
    #include <iostream>

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

        {
            std::ostrstream s;
            s << 1.23;
            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

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