std::basic_syncbuf<CharT,Traits,Allocator>::operator=

 

C++

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Freestanding and hosted

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Named requirements

Feature test macros (C++20)

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Concepts library (C++20)

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Technical specifications

Symbols index

External libraries

 

Input/output library

I/O manipulators

Print functions (C++23)

C-style I/O

Buffers

basic_streambuf

basic_filebuf

basic_stringbuf

basic_spanbuf (C++23)

strstreambuf (deprecated in C++98)

basic_syncbuf (C++20)

Streams

Abstractions

ios_base

basic_ios

basic_istream

basic_ostream

basic_iostream

File I/O

basic_ifstream

basic_ofstream

basic_fstream

String I/O

basic_istringstream

basic_ostringstream

basic_stringstream

Array I/O

basic_ispanstream (C++23)

basic_ospanstream (C++23)

basic_spanstream (C++23)

istrstream (deprecated in C++98)

ostrstream (deprecated in C++98)

strstream (deprecated in C++98)

Synchronized Output

basic_osyncstream (C++20)

Types

streamoff

streamsize

fpos

Error category interface

iostream_category (C++11)

io_errc (C++11)

 

std::basic_syncbuf

Public member functions

basic_syncbuf::basic_syncbuf (C++20)

basic_syncbuf::operator= (C++20)

basic_syncbuf::~basic_syncbuf (C++20)

basic_syncbuf::swap (C++20)

basic_syncbuf::emit (C++20)

basic_syncbuf::get_wrapped (C++20)

basic_syncbuf::get_allocator (C++20)

basic_syncbuf::set_emit_on_sync (C++20)

Protected member functions

basic_syncbuf::sync (C++20)

Non-member functions

swap(std::basic_syncbuf) (C++20)

 

basic_syncbuf& operator=( basic_syncbuf&& other );

First, calls emit() to transmit all pending output (and delayed flush, if any) to the wrapped stream.

Then performs move-assignment by moving all contents from other, including the temporary storage, the wrapped stream pointer, policy, and all other state (such as the mutex pointer). After move, other is not associated with a stream, and other.get_wrapped() == nullptr. The put area member pointers of the base class std::basic_streambuf of other are guaranteed to be null. Destroying a moved-from other will not produce any output.

If std::allocator_traits<Allocator>::propagate_on_container_move_assignment::value is false, then the allocator is unchanged. Otherwise, after move-assignment, get_allocator() equals other.get_allocator().

Parameters

other

-

another std::basic_syncbuf to move from

Return value

*this

See also

operator=	assigns a basic_osyncstream object (public member function of std::basic_osyncstream<CharT,Traits,Allocator>)
(constructor)	constructs a basic_syncbuf object (public member function)
emit	atomically transmits the entire internal buffer to the wrapped streambuf (public member function)
swap	swaps two basic_syncbuf objects (public member function)