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std::basic_istream::~basic_istream

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< cpp‎ | io‎ | basic istream
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virtual ~basic_istream();

Destructs the input stream.

[edit] Notes

This destructor does not perform any operation on the underlying streambuffer (rdbuf()): the destructors of the derived input streams such as std::basic_ifstream and std::basic_istringstream are responsible for calling the destructors of the streambuffers.

[edit] Example

#include <sstream>
#include <iostream>
 
void print_stringbuf(std::streambuf* p)
{
    std::istream buf(p); // buf shares the buffer with s1
    int n;
    buf >> n;
    std::cout << n;
} // calls the destructor of buf. p remains unaffected
 
int main()
{
    std::istringstream s1("10 20");
    print_stringbuf(s1.rdbuf());
    int n;
    s1 >> n;
    std::cout << ',' << n << '\n';
}

Output:

10,20