std::basic_ifstream::is_open

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C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Input/output library
I/O manipulators C-style I/O Buffers basic_streambuf basic_filebuf basic_stringbuf strstreambuf (deprecated) Streams Abstractions ios_base basic_ios basic_istream basic_ostream basic_iostream File I/O basic_ifstream basic_ofstream basic_fstream String I/O basic_istringstream basic_ostringstream basic_stringstream Array I/O istrstream (deprecated) ostrstream (deprecated) strstream (deprecated) Types streamoff streamsize fpos Error category interface iostream_category (C++11) io_errc (C++11)
std::basic_ifstream
Member functions basic_ifstream::basic_ifstream basic_ifstream::operator= (C++11) basic_ifstream::swap (C++11) basic_ifstream::rdbuf File operations basic_ifstream::is_open basic_ifstream::open basic_ifstream::close Non-member functions basic_ifstream::swap(std::basic_ifstream) (C++11)

bool is_open() const;

Checks if the file stream has an associated file.

Effectively calls rdbuf()->is_open().

Contents 1 Parameters 2 Return value 3 Example 4 See also

[edit] Parameters

(none)

[edit] Return value

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

[edit] Example

This section is incomplete

[edit] See also

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