std::basic_iostream<CharT,Traits>::basic_iostream

From cppreference.com

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 control library(C++26)
Technical specifications
Symbols index
External libraries

[edit]

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)

[edit]

std::basic_iostream

Member functions
basic_iostream::basic_iostream
basic_iostream::~basic_iostream
Protected member functions
basic_iostream::operator=
basic_iostream::swap

[edit]

explicit basic_iostream(std::basic_streambuf<CharT,Traits>* sb);	(1)
basic_iostream(const basic_iostream& other)= delete;	(2)	(since C++11)
protected: basic_iostream( basic_iostream&& other);	(3)	(since C++11)

Constructs new stream object.

1) Initializes with streambufsb. The base classes are initialized asbasic_istream<CharT,Traits>(sb) andbasic_ostream<CharT,Traits>(sb). After the callrdbuf()== sb andgcount()==0.

2) Copy construction is not allowed.

3) Move constructor: move-constructs the first base classbasic_istream asbasic_istream<CharT,Traits>(std::move(rhs));, which in turn move-constructs and initializes the virtual basestd::basic_ios. The initialization of the other base,basic_ostream, is implementation-defined (e.g., a protected default constructor may be added tostd::basic_ostream, which does nothing) because move-construction cannot userhs twice. This move constructor is protected: it is called by the move constructors of the derived stream classesstd::basic_fstream andstd::basic_stringstream before they move-construct and associate the stream buffer.