C++ Library - <wistream>

Introduction

Input stream objects can read and interpret input from sequences of characters. Specific members are provided to perform these input operations.

The standard object wcin is an object of this type.

Below is definition of std::wistream.

typedef basic_istream<wchar_t> wistream;

charT − Character type.
traits − Character traits class that defines essential properties of the characters used by stream objects.

Sr.No.	Member types	Definition
1	event	Type to indicate event type
2	event_callback	Event callback function type
3	failure	Base class for stream exceptions
4	fmtflags	Type for stream format flags
5	Init	Initialize standard stream objects
6	iostate	Type for stream state flags
7	openmode	Type for stream opening mode flags
8	seekdir	Type for stream seeking direction flag

Sr.No.	Member types	Definition
1	(constructor)	Construct object (public member function )
2	(destructor)	Destruct object (public member function )

Sr.No.	Input	Definition
1	input	Extract formatted input

Sr.No.	Input	Definition
1	gcount	It is used to get character count
2	get	It is used to get characters
3	getline	It is used to get line
4	ignore	It is used to extract and discard characters
5	peek	It is used to peek next character
6	read	It is used to read block of data
7	readsome	It is used to Read data available in buffer
8	putback	It is used to put character back
9	unget	It is used to unget character

Sr.No.	Position	Definition
1	tellg	It is used to get position in input sequence
2	seekg	It is used to set position in input sequence

Sr.No.	Synchronization	Definition
1	sync	It is used to synchronize input buffer

Sr.No.	Member Functions	Definition
1	operator=	It is used to move assignment
2	swap	It is used to swap internals

Sr.No.	Member types	Definition
1	good	It is used to check whether state of stream is good
2	eof	It is used to check whether eofbit is set
3	fail	It is used to check whether either failbit or badbit is set
4	bad	It is used to check whether badbit is set
5	operator!	Evaluate stream
6	rdstate	It is used to get error state flags
7	setstate	It is used to set error state flag
8	clear	It is used to set error state flag
9	fill	Get/set fill character
10	exceptions	It is used to get/set exceptions mask
11	imbue	Imbue locale
12	tie	It is used to get/set tied stream
13	rdbuf	It is used to get/set stream buffer
14	narrow	Narrow character
15	widen	Widen character

istream.htm

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