[spanstream.cons]

# 31 Input/output library [[input.output]](./#input.output)

## 31.9 Span-based streams [[span.streams]](span.streams#spanstream.cons)

### 31.9.6 Class template basic_spanstream [[spanstream]](spanstream#cons)

#### 31.9.6.2 Constructors [spanstream.cons]

[ð](#lib:basic_spanstream,constructor)

`explicit basic_spanstream(std::span<charT> s,
                          ios_base::openmode which = ios_base::out | ios_bas::in);
`

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L10774)

*Effects*: Initializes the base class withbasic_iostream<charT, traits>(addressof(*sb*)) and *sb* withbasic_spanbuf<charT, traits>(s, which) ([[spanbuf.cons]](spanbuf.cons "31.9.3.2 Constructors"))[.](#1.sentence-1)

[ð](#lib:basic_spanstream,constructor_)

`basic_spanstream(basic_spanstream&& rhs);
`

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L10788)

*Effects*: Initializes the base class with std​::​move(rhs) and *sb* with std​::​move(rhs.*sb*)[.](#2.sentence-1)

Next, basic_iostream<charT, traits>​::​set_rdbuf(addressof(*sb*)) is called to install the contained basic_spanbuf[.](#2.sentence-2)
