std::istrstream
From cppreference.com
| Defined in header <strstream>
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| class istrstream : public std::istream |
(deprecated in C++98) (removed in C++26) |
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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
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CharT
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traits_type
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Traits
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int_type
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Traits::int_type
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pos_type
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Traits::pos_type
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off_type
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Traits::off_type
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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:
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| 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) | |||||||||||||||||||||||||||||||||||||||