std::ios_base::operator=

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Diagnostics library

Memory management library

Metaprogramming library (C++11)

General utilities library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Strings library

Text processing library

Numerics library

Date and time library

Input/output library

Filesystem library (C++17)

Concurrency support library (C++11)

Execution support library (C++26)

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 (C++98/26*)

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 (C++98/26*)

ostrstream (C++98/26*)

strstream (C++98/26*)

Synchronized Output

basic_osyncstream (C++20)

Types

streamoff

streamsize

fpos

Error category interface

iostream_category (C++11)

io_errc (C++11)

 

std::ios_base

Member functions

ios_base::ios_base

ios_base::~ios_base

ios_base::operator=

Formatting

ios_base::flags

ios_base::setf

ios_base::unsetf

ios_base::precision

ios_base::width

Locales

ios_base::imbue

ios_base::getloc

Internal extensible array

ios_base::xalloc

ios_base::iword

ios_base::pword

Miscellaneous

ios_base::register_callback

ios_base::sync_with_stdio

Member classes

ios_base::failure

ios_base::Init

Member types

ios_base::openmode

ios_base::fmtflags

ios_base::iostate

ios_base::seekdir

ios_base::event

ios_base::event_callback

 

private: ios_base& operator=( const ios_base& );		(until C++11)
public: ios_base& operator=( const ios_base& ) = delete;		(since C++11)

The copy assignment operator is private(until C++11)deleted(since C++11): streams are not copy-assignable.

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 50	C++98	the copy assignment operator was not specified	specified as private