std:: istrstream
From cppreference.com
|
Defined in header
<strstream>
|
||
|
class
istrstream
:
public
std::
istream
|
(deprecated in C++98)
(removed in C++26) |
|
The class
istrstream
implements input operations on array-backed streams. It essentially wraps a raw array I/O device implementation (
std::strstreambuf
) into the higher-level interface of
std::basic_istream
.
The typical implementation of
istrstream
holds only one non-derived data member: an object of type
std::strstreambuf
.
Notes
istrstream
has been deprecated since C++98 and removed since C++26.
std::istringstream
,
std::ispanstream
(since C++23)
, and
boost::iostreams::array_source
are the recommended replacements.
Member functions
constructs an
istrstream
object, optionally allocating the buffer
(public member function) |
|
|
[virtual]
|
destructs an
istrstream
object, optionally deallocating the buffer
(virtual public member function) |
obtains a pointer to the associated
strstreambuf
(public member function) |
|
|
accesses the output buffer
(public member function) |
Inherited from std:: basic_istream
Member functions
Formatted input |
|
|
extracts formatted data
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
Unformatted input |
|
|
extracts characters
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
|
reads the next character without extracting it
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
|
unextracts a character
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
|
puts a character into input stream
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
|
extracts characters until the given character is found
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
|
extracts and discards characters until the given character is found
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
|
extracts blocks of characters
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
|
extracts already available blocks of characters
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
|
returns number of characters extracted by last unformatted input operation
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
Positioning |
|
|
returns the input position indicator
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
|
sets the input position indicator
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
Miscellaneous |
|
|
synchronizes with the underlying storage device
(public member function of
std::basic_istream<CharT,Traits>
)
|
|
Member classes
|
implements basic logic for preparation of the stream for input operations
(public member class of
std::basic_istream<CharT,Traits>
)
|
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
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
checks if end-of-file has been reached
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
checks if an error has occurred
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
checks if a non-recoverable error has occurred
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
checks if an error has occurred (synonym of
fail()
)
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
checks if no error has occurred (synonym of
!
fail()
)
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
returns state flags
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
sets state flags
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
modifies state flags
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
Formatting |
|
|
copies formatting information
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
manages the fill character
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
Miscellaneous |
|
|
manages exception mask
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
sets the locale
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
manages associated stream buffer
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
manages tied stream
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
narrows characters
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
|
widens characters
(public member function of
std::basic_ios<CharT,Traits>
)
|
|
Inherited from std:: ios_base
Member functions
Formatting |
|
|
manages format flags
(public member function of
std::ios_base
)
|
|
|
sets specific format flag
(public member function of
std::ios_base
)
|
|
|
clears specific format flag
(public member function of
std::ios_base
)
|
|
|
manages decimal precision of floating point operations
(public member function of
std::ios_base
)
|
|
|
manages field width
(public member function of
std::ios_base
)
|
|
Locales |
|
|
sets locale
(public member function of
std::ios_base
)
|
|
|
returns current locale
(public member function of
std::ios_base
)
|
|
Internal extensible array |
|
|
[static]
|
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
)
|
|
resizes the private storage if necessary and access to the
long
element at the given index
(public member function of
std::ios_base
)
|
|
|
resizes the private storage if necessary and access to the
void
*
element at the given index
(public member function of
std::ios_base
)
|
|
Miscellaneous |
|
|
registers event callback function
(public member function of
std::ios_base
)
|
|
|
[static]
|
sets whether C++ and C I/O libraries are interoperable
(public static member function of
std::ios_base
)
|
Member classes |
|
|
stream exception
(public member class of
std::ios_base
)
|
|
|
initializes standard stream objects
(public member class of
std::ios_base
)
|
|
Member types and constants |
|||||||||||||||||||||||||||||||||||||||
| Type | Explanation | ||||||||||||||||||||||||||||||||||||||
|
stream open mode type
The following constants are also defined:
(typedef) |
|||||||||||||||||||||||||||||||||||||||
|
formatting flags type
The following constants are also defined:
(typedef) |
|||||||||||||||||||||||||||||||||||||||
|
state of the stream type
The following constants are also defined:
(typedef) |
|||||||||||||||||||||||||||||||||||||||
|
seeking direction type
The following constants are also defined:
(typedef) |
|||||||||||||||||||||||||||||||||||||||
|
specifies event type
(enum) |
|||||||||||||||||||||||||||||||||||||||
|
callback function type
(typedef) |
|||||||||||||||||||||||||||||||||||||||