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std::basic_...am::is_open(3)  C++ Standard Libary std::basic_...am::is_open(3)

NAME
       std::basic_ofstream::is_open - std::basic_ofstream::is_open

Synopsis
	  bool is_open();	 (until	C++11)
	  bool is_open() const;	 (since	C++11)

	  Checks if the	file stream has	an associated file.

	  Effectively calls rdbuf()->is_open().

Parameters
	  (none)

Return value
	  true if the file stream has an associated file, false	otherwise

Example
	   This	section	is incomplete
	   Reason: no example

See also
	  open	opens a	file and associates it with the	stream
		(public	member function)
	  close	closes the associated file
		(public	member function)

http://cppreference.com		  2022.07.31	  std::basic_...am::is_open(3)

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