std::basic_fstream::is_open

 

C++

Language

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Utilities library

Strings library

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Regular expressions library (C++11)

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Input/output library

I/O manipulators

C-style I/O

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basic_streambuf

basic_filebuf

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ios_base

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std::basic_fstream

Member functions

basic_fstream::basic_fstream

basic_fstream::operator= (C++11)

basic_fstream::swap (C++11)

basic_fstream::rdbuf

File operations

basic_fstream::is_open

basic_fstream::open

basic_fstream::close

Non-member functions

basic_fstream::swap(std::basic_fstream) (C++11)

 

bool is_open() const;

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

See also

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