std::strstream::~strstream (3) - Linux Manuals

std::strstream::~strstream: std::strstream::~strstream

NAME

std::strstream::~strstream - std::strstream::~strstream

Synopsis

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

// Run this code

  #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