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cppdraft/iostreamclass.md

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+[iostreamclass]
+
+# 31 Input/output library [[input.output]](./#input.output)
+
+## 31.7 Formatting and manipulators [[iostream.format]](iostream.format#iostreamclass)
+
+### 31.7.5 Input streams [[input.streams]](input.streams#iostreamclass)
+
+#### 31.7.5.7 Class template basic_iostream [iostreamclass]
+
+#### [31.7.5.7.1](#general) General [[iostreamclass.general]](iostreamclass.general)
+
+[🔗](#lib:basic_iostream)
+
+namespace std {template<class charT, class traits = char_traits<charT>>class basic_iostream : public basic_istream<charT, traits>, public basic_ostream<charT, traits> {public:using char_type = charT; using int_type = typename traits::int_type; using pos_type = typename traits::pos_type; using off_type = typename traits::off_type; using traits_type = traits; // [[iostream.cons]](#iostream.cons "31.7.5.7.2 Constructors"), constructorexplicit basic_iostream(basic_streambuf<charT, traits>* sb); // [[iostream.dest]](#iostream.dest "31.7.5.7.3 Destructor"), destructorvirtual ~basic_iostream(); protected:// [[iostream.cons]](#iostream.cons "31.7.5.7.2 Constructors"), constructor basic_iostream(const basic_iostream&) = delete;
+ basic_iostream(basic_iostream&& rhs); // [[iostream.assign]](#iostream.assign "31.7.5.7.4 Assignment and swap"), assignment and swap basic_iostream& operator=(const basic_iostream&) = delete;
+ basic_iostream& operator=(basic_iostream&& rhs); void swap(basic_iostream& rhs); };}
+
+[1](#general-1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L5828)
+
+The class templatebasic_iostream inherits a number of functions that allow reading input and writing output to
+sequences controlled by a stream buffer[.](#general-1.sentence-1)
+
+#### [31.7.5.7.2](#iostream.cons) Constructors [[iostream.cons]](iostream.cons)
+
+[🔗](#lib:basic_iostream,constructor)
+
+`explicit basic_iostream(basic_streambuf<charT, traits>* sb);
+`
+
+[1](#iostream.cons-1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L5842)
+
+*Effects*: Initializes the base class subobjects withbasic_istream<charT, traits>(sb) ([[istream]](istream "31.7.5.2 Class template basic_­istream"))
+and[basic_ostream<charT, traits>(sb)](ostream "31.7.6.2 Class template basic_­ostream [ostream]")[.](#iostream.cons-1.sentence-1)
+
+[2](#iostream.cons-2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L5849)
+
+*Postconditions*: rdbuf() == sb andgcount() == 0[.](#iostream.cons-2.sentence-1)
+
+[🔗](#lib:basic_iostream,constructor_)
+
+`basic_iostream(basic_iostream&& rhs);
+`
+
+[3](#iostream.cons-3)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L5862)
+
+*Effects*: Move constructs from the rvalue rhs by
+constructing the basic_istream base class withstd​::​move(rhs)[.](#iostream.cons-3.sentence-1)
+
+#### [31.7.5.7.3](#iostream.dest) Destructor [[iostream.dest]](iostream.dest)
+
+[🔗](#lib:basic_iostream,destructor)
+
+`virtual ~basic_iostream();
+`
+
+[1](#iostream.dest-1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L5877)
+
+*Remarks*: Does not perform any operations onrdbuf()[.](#iostream.dest-1.sentence-1)
+
+#### [31.7.5.7.4](#iostream.assign) Assignment and swap [[iostream.assign]](iostream.assign)
+
+[🔗](#lib:operator=,basic_iostream)
+
+`basic_iostream& operator=(basic_iostream&& rhs);
+`
+
+[1](#iostream.assign-1)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L5891)
+
+*Effects*: Equivalent to swap(rhs)[.](#iostream.assign-1.sentence-1)
+
+[🔗](#lib:swap,basic_iostream)
+
+`void swap(basic_iostream& rhs);
+`
+
+[2](#iostream.assign-2)
+
+[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/iostreams.tex#L5902)
+
+*Effects*: Calls basic_istream<charT, traits>​::​swap(rhs)[.](#iostream.assign-2.sentence-1)