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[ostream.cons]
# 31 Input/output library [[input.output]](./#input.output)
## 31.7 Formatting and manipulators [[iostream.format]](iostream.format#ostream.cons)
### 31.7.6 Output streams [[output.streams]](output.streams#ostream.cons)
#### 31.7.6.2 Class template basic_ostream [[ostream]](ostream#cons)
#### 31.7.6.2.2 Constructors [ostream.cons]
[🔗](#lib:basic_ostream,constructor)
`explicit basic_ostream(basic_streambuf<charT, traits>* sb);
`
[1](#1)
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L6120)
*Effects*: Initializes the base class subobject withbasic_ios<charT, traits>::init(sb) ([[basic.ios.cons]](basic.ios.cons "31.5.4.2Constructors"))[.](#1.sentence-1)
[2](#2)
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L6125)
*Postconditions*: rdbuf() == sb[.](#2.sentence-1)
[🔗](#lib:basic_ostream,constructor_)
`basic_ostream(basic_ostream&& rhs);
`
[3](#3)
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L6136)
*Effects*: Move constructs from the rvalue rhs[.](#3.sentence-1)
This is accomplished by default constructing the base class and callingbasic_ios<charT, traits>::move(rhs) to initialize the
base class[.](#3.sentence-2)
[🔗](#lib:basic_ostream,destructor)
`virtual ~basic_ostream();
`
[4](#4)
[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L6150)
*Remarks*: Does not perform any operations onrdbuf()[.](#4.sentence-1)