std:: basic_ostringstream
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Defined in header
<sstream>
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template
<
class
CharT,
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The class template
std::basic_ostringstream
implements output operations on string based streams. It effectively stores an instance of
std::basic_string
and performs output operations to it.
At the low level, the class essentially wraps a raw string device implementation of std::basic_stringbuf into a higher-level interface of std::basic_ostream . The complete interface to unique std::basic_stringbuf members is provided.
Inheritance diagram
Several typedefs for common character types are provided:
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Defined in header
<sstream>
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| Type | Definition |
std::ostringstream
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std :: basic_ostringstream < char > |
std::wostringstream
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std :: basic_ostringstream < wchar_t > |
Member types
| Member type | Definition |
char_type
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CharT
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traits_type
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Traits
; the program is ill-formed if
Traits::char_type
is not
CharT
.
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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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allocator_type
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Allocator
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Exposition-only members
| Name | Definition |
sb
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the
std::
basic_stringbuf
<
CharT, Traits, Allocator
>
used as the underlying buffer
( exposition-only member object* ) |
Member functions
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constructs the string stream
(public member function) |
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(C++11)
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moves the string stream
(public member function) |
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(C++11)
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swaps two string streams
(public member function) |
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returns the underlying raw string device object
(public member function) |
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String operations |
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gets or sets the contents of underlying string device object
(public member function) |
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(C++20)
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obtains a view over the contents of underlying string device object
(public member function) |
Non-member functions
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specializes the
std::swap
algorithm
(function template) |
Inherited from std:: basic_ostream
Member functions
Formatted output |
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inserts formatted data
(public member function of
std::basic_ostream<CharT,Traits>
)
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Unformatted output |
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inserts a character
(public member function of
std::basic_ostream<CharT,Traits>
)
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inserts blocks of characters
(public member function of
std::basic_ostream<CharT,Traits>
)
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Positioning |
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returns the output position indicator
(public member function of
std::basic_ostream<CharT,Traits>
)
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sets the output position indicator
(public member function of
std::basic_ostream<CharT,Traits>
)
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Miscellaneous |
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synchronizes with the underlying storage device
(public member function of
std::basic_ostream<CharT,Traits>
)
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Member classes
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implements basic logic for preparation of the stream for output operations
(public member class of
std::basic_ostream<CharT,Traits>
)
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Inherited from std:: basic_ios
Member types
| Member type | Definition |
char_type
|
CharT
|
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 |
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checks if no error has occurred i.e. I/O operations are available
(public member function of
std::basic_ios<CharT,Traits>
)
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checks if end-of-file has been reached
(public member function of
std::basic_ios<CharT,Traits>
)
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checks if an error has occurred
(public member function of
std::basic_ios<CharT,Traits>
)
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checks if a non-recoverable error has occurred
(public member function of
std::basic_ios<CharT,Traits>
)
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checks if an error has occurred (synonym of
fail()
)
(public member function of
std::basic_ios<CharT,Traits>
)
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checks if no error has occurred (synonym of
!
fail()
)
(public member function of
std::basic_ios<CharT,Traits>
)
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returns state flags
(public member function of
std::basic_ios<CharT,Traits>
)
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sets state flags
(public member function of
std::basic_ios<CharT,Traits>
)
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modifies state flags
(public member function of
std::basic_ios<CharT,Traits>
)
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Formatting |
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copies formatting information
(public member function of
std::basic_ios<CharT,Traits>
)
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manages the fill character
(public member function of
std::basic_ios<CharT,Traits>
)
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Miscellaneous |
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manages exception mask
(public member function of
std::basic_ios<CharT,Traits>
)
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sets the locale
(public member function of
std::basic_ios<CharT,Traits>
)
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manages associated stream buffer
(public member function of
std::basic_ios<CharT,Traits>
)
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manages tied stream
(public member function of
std::basic_ios<CharT,Traits>
)
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narrows characters
(public member function of
std::basic_ios<CharT,Traits>
)
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widens characters
(public member function of
std::basic_ios<CharT,Traits>
)
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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 I/O 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 | ||||||||||||||||||||||||||||||||||||||
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stream open mode type
The following constants are also defined:
(typedef) |
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formatting flags type
The following constants are also defined:
(typedef) |
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state of the stream type
The following constants are also defined:
(typedef) |
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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) |
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