class CharT,
class Traits = std::char_traits<CharT>
> class basic_iostream :
public basic_istream<CharT, Traits>,
The class template basic_iostream provides support for high level input/output operations on streams. The supported operations include sequential reading or writing and formatting. This functionality is implemented over the interface provided by the std::basic_streambuf class. It is accessed through std::basic_ios class.
Inheritance diagram
Several typedefs for common character types are provided:
Type Definitionstd::iostream std::basic_iostream<char> std::wiostream std::basic_iostream<wchar_t> [edit] Member types Member type Definition char_type CharT[edit] traits_type Traits; the program is ill-formed if Traits::char_type is not CharT.[edit] int_type Traits::int_type[edit] pos_type Traits::pos_type[edit] off_type Traits::off_type[edit] [edit] Member functions [edit] Protected member functions move-assigns another basic_iostream
basic_iostream
std::basic_istream<CharT,Traits>) [edit] Unformatted input extracts characters
std::basic_istream<CharT,Traits>) [edit] reads the next character without extracting it
std::basic_istream<CharT,Traits>) [edit] unextracts a character
std::basic_istream<CharT,Traits>) [edit] puts a character into input stream
std::basic_istream<CharT,Traits>) [edit] extracts characters until the given character is found
std::basic_istream<CharT,Traits>) [edit] extracts and discards characters until the given character is found
std::basic_istream<CharT,Traits>) [edit] extracts blocks of characters
std::basic_istream<CharT,Traits>) [edit] extracts already available blocks of characters
std::basic_istream<CharT,Traits>) [edit] returns number of characters extracted by last unformatted input operation
std::basic_istream<CharT,Traits>) [edit] Positioning returns the input position indicator
std::basic_istream<CharT,Traits>) [edit] sets the input position indicator
std::basic_istream<CharT,Traits>) [edit] Miscellaneous synchronizes with the underlying storage device
std::basic_istream<CharT,Traits>) [edit] Member classes implements basic logic for preparation of the stream for input operations
std::basic_istream<CharT,Traits>) [edit] Inherited from std::basic_ostream Member functions Formatted output inserts formatted data
std::basic_ostream<CharT,Traits>) [edit] Unformatted output inserts a character
std::basic_ostream<CharT,Traits>) [edit] inserts blocks of characters
std::basic_ostream<CharT,Traits>) [edit] Positioning returns the output position indicator
std::basic_ostream<CharT,Traits>) [edit] sets the output position indicator
std::basic_ostream<CharT,Traits>) [edit] Miscellaneous synchronizes with the underlying storage device
std::basic_ostream<CharT,Traits>) [edit] Member classes implements basic logic for preparation of the stream for output operations
std::basic_ostream<CharT,Traits>) [edit] Inherited from std::basic_ios Member types Member type Definition char_type CharT traits_type Traits int_type Traits::int_type pos_type Traits::pos_type off_type Traits::off_type Member functions State functions checks if no error has occurred i.e. I/O operations are available
std::basic_ios<CharT,Traits>) [edit] checks if end-of-file has been reached
std::basic_ios<CharT,Traits>) [edit] checks if an error has occurred
std::basic_ios<CharT,Traits>) [edit] checks if a non-recoverable error has occurred
std::basic_ios<CharT,Traits>) [edit] checks if an error has occurred (synonym of fail())
std::basic_ios<CharT,Traits>) [edit] checks if no error has occurred (synonym of !fail())
std::basic_ios<CharT,Traits>) [edit] returns state flags
std::basic_ios<CharT,Traits>) [edit] sets state flags
std::basic_ios<CharT,Traits>) [edit] modifies state flags
std::basic_ios<CharT,Traits>) [edit] Formatting copies formatting information
std::basic_ios<CharT,Traits>) [edit] manages the fill character
std::basic_ios<CharT,Traits>) [edit] Miscellaneous manages exception mask
std::basic_ios<CharT,Traits>) [edit] sets the locale
std::basic_ios<CharT,Traits>) [edit] manages associated stream buffer
std::basic_ios<CharT,Traits>) [edit] manages tied stream
std::basic_ios<CharT,Traits>) [edit] narrows characters
std::basic_ios<CharT,Traits>) [edit] widens characters
std::basic_ios<CharT,Traits>) [edit] Inherited from std::ios_base Member functions Formatting manages format flags
std::ios_base) [edit] sets specific format flag
std::ios_base) [edit] clears specific format flag
std::ios_base) [edit] manages decimal precision of floating point operations
std::ios_base) [edit] manages field width
std::ios_base) [edit] Locales sets locale
std::ios_base) [edit] returns current locale
std::ios_base) [edit] Internal extensible array returns a program-wide unique integer that is safe to use as index to pword() and iword()
std::ios_base) [edit] resizes the private storage if necessary and access to the long element at the given index
std::ios_base) [edit] resizes the private storage if necessary and access to the void* element at the given index
std::ios_base) [edit] Miscellaneous registers event callback function
std::ios_base) [edit] sets whether C++ and C I/O libraries are interoperable
std::ios_base) [edit] Member classes stream exception
std::ios_base) [edit] initializes standard stream objects
std::ios_base) [edit] Member types and constants Type Explanation stream open mode type
The following constants are also defined:
The following constants are also defined:
The following constants are also defined:
The following constants are also defined:
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
DR Applied to Behavior as published Correct behavior LWG 271 C++98 the member typeschar_type, traits_type, int_type, pos_type and off_type were not defined
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