Namespaces
Variants
Views
Actions

Difference between revisions of "cpp/io/basic ostringstream"

From cppreference.com
< cpp‎ | io
m (Text replace - "{{tdcl" to "{{dcl")
m (Text replace - "io/tdcl" to "io/dcl")
Line 38: Line 38:
 
{{dcl list begin}}
 
{{dcl list begin}}
 
{{dcl list hitem | Member type | Definition}}
 
{{dcl list hitem | Member type | Definition}}
−
{{dcl list template | cpp/io/tdcl list char_type}}
+
{{dcl list template | cpp/io/dcl list char_type}}
−
{{dcl list template | cpp/io/tdcl list traits_type}}
+
{{dcl list template | cpp/io/dcl list traits_type}}
−
{{dcl list template | cpp/io/tdcl list int_type}}
+
{{dcl list template | cpp/io/dcl list int_type}}
−
{{dcl list template | cpp/io/tdcl list pos_type}}
+
{{dcl list template | cpp/io/dcl list pos_type}}
−
{{dcl list template | cpp/io/tdcl list off_type}}
+
{{dcl list template | cpp/io/dcl list off_type}}
−
{{dcl list template | cpp/io/tdcl list allocator_type}}
+
{{dcl list template | cpp/io/dcl list allocator_type}}
 
{{dcl list end}}
 
{{dcl list end}}
  

Revision as of 02:08, 12 June 2012

Template:cpp/io/basic ostringstream/sidebar Template:ddcl list begin <tr class="t-dsc-header">

<td>
Defined in header <sstream>
</td>

<td></td> <td></td> </tr> <tr class="t-dcl ">

<td >
template<

    class CharT,
    class Traits = std::char_traits<CharT>

> class basic_ostringstream;
</td>

<td class="t-dcl-nopad"> </td> <td > (until C++11) </td> </tr> <tr class="t-dcl ">

<td >
template<

    class CharT,
    class Traits = std::char_traits<CharT>,
    class Allocator = std::allocator<CharT>

> class basic_ostringstream;
</td>

<td class="t-dcl-nopad"> </td> <td > (since C++11) </td> </tr> Template:ddcl list end

The class template basic_ostringstream implements output operations on memory (std::basic_string) based streams. It essentially wraps a raw string device implementation (basic_stringbuf) into a higher-level interface (basic_ostream). The complete interface to unique basic_stringbuf members is provided.

cpp/io/ios basecpp/io/basic ioscpp/io/basic ostreamstd-basic ostringstream-inheritance.svg

Inheritance diagram

Two specializations for common character types are also defined:

Defined in header <sstream>
Type Definition
ostringstream basic_ostringstream<char>
wostringstream basic_ostringstream<wchar_t>

Contents

Member types

Template:cpp/io/dcl list char typeTemplate:cpp/io/dcl list traits typeTemplate:cpp/io/dcl list int typeTemplate:cpp/io/dcl list pos typeTemplate:cpp/io/dcl list off typeTemplate:cpp/io/dcl list allocator type
Member type Definition

Member functions

Template:cpp/io/basic stringstream/dcl list constructorTemplate:cpp/io/basic stringstream/dcl list operator=Template:cpp/io/basic stringstream/dcl list swapTemplate:cpp/io/basic stringstream/dcl list rdbufTemplate:cpp/io/basic stringstream/dcl list str
String operations

Inherited from std::basic_ostream

Member functions

Formatted output
inserts formatted data
(public member function of std::basic_ostream<CharT,Traits>) [edit]
Unformatted output
inserts a character
(public member function of std::basic_ostream<CharT,Traits>) [edit]
inserts blocks of characters
(public member function of std::basic_ostream<CharT,Traits>) [edit]
Positioning
returns the output position indicator
(public member function of std::basic_ostream<CharT,Traits>) [edit]
sets the output position indicator
(public member function of std::basic_ostream<CharT,Traits>) [edit]
Miscellaneous
synchronizes with the underlying storage device
(public member function of std::basic_ostream<CharT,Traits>) [edit]

Member classes

 implements basic logic for preparation of the stream for output operations
(public member class of 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
(public member function of std::basic_ios<CharT,Traits>) [edit]
checks if end-of-file has been reached
(public member function of std::basic_ios<CharT,Traits>) [edit]
checks if an error has occurred
(public member function of std::basic_ios<CharT,Traits>) [edit]
checks if a non-recoverable error has occurred
(public member function of std::basic_ios<CharT,Traits>) [edit]
checks if an error has occurred (synonym of fail())
(public member function of std::basic_ios<CharT,Traits>) [edit]
checks if no error has occurred (synonym of !fail())
(public member function of std::basic_ios<CharT,Traits>) [edit]
returns state flags
(public member function of std::basic_ios<CharT,Traits>) [edit]
sets state flags
(public member function of std::basic_ios<CharT,Traits>) [edit]
modifies state flags
(public member function of std::basic_ios<CharT,Traits>) [edit]
Formatting
copies formatting information
(public member function of std::basic_ios<CharT,Traits>) [edit]
manages the fill character
(public member function of std::basic_ios<CharT,Traits>) [edit]
Miscellaneous
manages exception mask
(public member function of std::basic_ios<CharT,Traits>) [edit]
sets the locale
(public member function of std::basic_ios<CharT,Traits>) [edit]
manages associated stream buffer
(public member function of std::basic_ios<CharT,Traits>) [edit]
manages tied stream
(public member function of std::basic_ios<CharT,Traits>) [edit]
narrows characters
(public member function of std::basic_ios<CharT,Traits>) [edit]
widens characters
(public member function of std::basic_ios<CharT,Traits>) [edit]

Inherited from std::ios_base

Member functions

Formatting
manages format flags
(public member function of std::ios_base) [edit]
sets specific format flag
(public member function of std::ios_base) [edit]
clears specific format flag
(public member function of std::ios_base) [edit]
manages decimal precision of floating point operations
(public member function of std::ios_base) [edit]
manages field width
(public member function of std::ios_base) [edit]
Locales
sets locale
(public member function of std::ios_base) [edit]
returns current locale
(public member function of std::ios_base) [edit]
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) [edit]
resizes the private storage if necessary and access to the long element at the given index
(public member function of std::ios_base) [edit]
resizes the private storage if necessary and access to the void* element at the given index
(public member function of std::ios_base) [edit]
Miscellaneous
registers event callback function
(public member function of std::ios_base) [edit]
[static]
 sets whether C++ and C I/O libraries are interoperable
(public static member function of std::ios_base) [edit]
Member classes
stream exception
(public member class of std::ios_base) [edit]
initializes standard stream objects
(public member class of std::ios_base) [edit]

Member types and constants

Type Explanation
stream open mode type

The following constants are also defined:

Constant Explanation[edit]
app seek to the end of stream before each write[edit]
binary open in binary mode[edit]
in open for reading[edit]
out open for writing[edit]
trunc discard the contents of the stream when opening[edit]
ate seek to the end of stream immediately after open[edit]
noreplace (C++23) open in exclusive mode[edit]

(typedef) [edit]
formatting flags type

The following constants are also defined:

Constant Explanation[edit]
dec use decimal base for integer I/O: see std::dec[edit]
oct use octal base for integer I/O: see std::oct[edit]
hex use hexadecimal base for integer I/O: see std::hex[edit]
basefield dec | oct | hex. Useful for masking operations[edit]
left left adjustment (adds fill characters to the right): see std::left[edit]
right right adjustment (adds fill characters to the left): see std::right[edit]
internal internal adjustment (adds fill characters to the internal designated point): see std::internal[edit]
adjustfield left | right | internal. Useful for masking operations[edit]
scientific generate floating point types using scientific notation, or hex notation if combined with fixed: see std::scientific[edit]
fixed generate floating point types using fixed notation, or hex notation if combined with scientific: see std::fixed[edit]
floatfield scientific | fixed. Useful for masking operations[edit]
boolalpha insert and extract bool type in alphanumeric format: see std::boolalpha[edit]
showbase generate a prefix indicating the numeric base for integer output, require the currency indicator in monetary I/O: see std::showbase[edit]
showpoint generate a decimal-point character unconditionally for floating-point number output: see std::showpoint[edit]
showpos generate a + character for non-negative numeric output: see std::showpos[edit]
skipws skip leading whitespace before certain input operations: see std::skipws[edit]
unitbuf flush the output after each output operation: see std::unitbuf[edit]
uppercase replace certain lowercase letters with their uppercase
equivalents in certain output operations: see std::uppercase[edit]

(typedef) [edit]
state of the stream type

The following constants are also defined:

Constant Explanation[edit]
goodbit no error[edit]
badbit irrecoverable stream error[edit]
failbit input/output operation failed (formatting or extraction error)[edit]
eofbit associated input sequence has reached end-of-file[edit]

(typedef) [edit]
seeking direction type

The following constants are also defined:

Constant Explanation[edit]
beg the beginning of a stream[edit]
end the ending of a stream[edit]
cur the current position of stream position indicator[edit]

(typedef) [edit]
specifies event type
(enum) [edit]
callback function type
(typedef) [edit]
Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/io/basic_ostringstream&oldid=32761"