filebuf::is_open
int is_open() const;
Return Value
Returns a nonzero value if this filebuf object is attached to an open disk file identified by a file descriptor; otherwise 0.
filebuf Overview | Stream Buffer Classes
See Also filebuf::open
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int is_open() const;
Return Value
Returns a nonzero value if this filebuf object is attached to an open disk file identified by a file descriptor; otherwise 0.
filebuf Overview | Stream Buffer Classes
See Also filebuf::open