std::basic_ifstream
From cppreference.com
Defined in header
<fstream>
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template<
class CharT, |
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The class template basic_ifstream
implements high-level input operations on file based streams. It interfaces a file-based streambuffer (std::basic_filebuf) with the high-level interface of (std::basic_istream).
A typical implementation of std::basic_ifstream
holds only one non-derived data member: an instance of std::basic_filebuf<CharT, Traits>.
Two specializations for common character types are also defined:
Defined in header
<fstream> |
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Type | Definition |
ifstream
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basic_ifstream<char> |
wifstream
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basic_ifstream<wchar_t> |
Contents |
[edit] Member types
Member type | Definition |
char_type
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CharT |
traits_type
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Traits |
int_type
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Traits::int_type |
pos_type
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Traits::pos_type |
off_type
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Traits::off_type |
[edit] Member functions
constructs the file stream (public member function) |
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(destructor)
[virtual] (implicitly declared)
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destructs the basic_ifstream and the associated buffer, closes the file (virtual public member function) |
(C++11)
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moves the file stream (public member function) |
(C++11)
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swaps two file streams (public member function) |
returns the underlying raw file device object (public member function) |
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File operations |
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checks if the stream has an associated file (public member function) |
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opens a file and associates it with the stream (public member function) |
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closes the associated file (public member function) |
[edit] Non-member functions
(C++11)
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specializes the std::swap algorithm (function template) |
Inherited from std::basic_istream
Member functions
Formatted input |
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extracts formatted data (public member function of std::basic_istream )
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Unformatted input |
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extracts characters (public member function of std::basic_istream )
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reads the next character without extracting it (public member function of std::basic_istream )
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unextracts a character (public member function of std::basic_istream )
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puts character into input stream (public member function of std::basic_istream )
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extracts characters until the given character is found (public member function of std::basic_istream )
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extracts and discards characters until the given character is found (public member function of std::basic_istream )
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extracts blocks of characters (public member function of std::basic_istream )
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extracts already available blocks of characters (public member function of std::basic_istream )
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returns number of characters extracted by last unformatted input operation (public member function of std::basic_istream )
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Positioning |
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returns the input position indicator (public member function of std::basic_istream )
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sets the input position indicator (public member function of std::basic_istream )
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Miscellaneous |
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synchronizes with the underlying storage device (public member function of std::basic_istream )
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Member classes
implements basic logic for preparation of the stream for input operations (public member class of std::basic_istream )
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Inherited from std::basic_ios
Member types
Member type | Definition |
char_type
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CharT |
traits_type
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Traits |
int_type
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Traits::int_type |
pos_type
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Traits::pos_type |
off_type
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Traits::off_type |
Member functions
State functions |
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checks if no error has occurred i.e. I/O operations are available (public member function of std::basic_ios )
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checks if end-of-file has been reached (public member function of std::basic_ios )
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checks if a recoverable error has occurred (public member function of std::basic_ios )
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checks if a non-recoverable error has occurred (public member function of std::basic_ios )
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checks if an error has occurred (synonym of fail()) (public member function of std::basic_ios )
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(until C++11)(since C++11)
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checks if no error has occurred (synonym of !fail()) (public member function of std::basic_ios )
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returns state flags (public member function of std::basic_ios )
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sets state flags (public member function of std::basic_ios )
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clears error and eof flags (public member function of std::basic_ios )
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Formatting |
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copies formatting information (public member function of std::basic_ios )
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manages the fill character (public member function of std::basic_ios )
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Miscellaneous |
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manages exception mask (public member function of std::basic_ios )
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sets the locale (public member function of std::basic_ios )
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manages associated stream buffer (public member function of std::basic_ios )
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manages tied stream (public member function of std::basic_ios )
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narrows characters (public member function of std::basic_ios )
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widens characters (public member function of std::basic_ios )
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Inherited from std::ios_base
Member functions
Formatting |
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manages format flags (public member function of std::ios_base )
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sets specific format flag (public member function of std::ios_base )
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clears specific format flag (public member function of std::ios_base )
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manages decimal precision of floating point operations (public member function of std::ios_base )
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manages field width (public member function of std::ios_base )
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Locales |
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sets locale (public member function of std::ios_base )
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returns current locale (public member function of std::ios_base )
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Internal extensible array |
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[static]
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returns a program-wide unique integer that is safe to use as index to pword() and iword() (public static member function of std::ios_base )
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resizes the private storage if necessary and access to the long element at the given index (public member function of std::ios_base )
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resizes the private storage if necessary and access to the void* element at the given index (public member function of std::ios_base )
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Miscellaneous |
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registers event callback function (public member function of std::ios_base )
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[static]
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sets whether C++ and C IO libraries are interoperable (public static member function of std::ios_base )
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Member classes |
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stream exception (public member class of std::ios_base )
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initializes standard stream objects (public member class of std::ios_base )
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Member types and constants |
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Type | Explanation | ||||||||||||||||||||||||||||||||||||||
stream open mode type
The following constants are also defined:
(typedef) |
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formatting flags type
The following constants are also defined:
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state of the stream type
The following constants are also defined:
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seeking direction type
The following constants are also defined:
(typedef) |
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specifies event type (enum) |
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callback function type (typedef) |