namespace std {
template <class charT, class traits = char_traits<charT>,
class Allocator = allocator<charT> >
class basic_stringstream
: public basic_iostream<charT,traits> {
public:
// types:
typedef charT char_type;
typedef typename traits::int_type int_type;
typedef typename traits::pos_type pos_type;
typedef typename traits::off_type off_type;
typedef traits traits_type;
typedef Allocator allocator_type;
// constructors/destructor
explicit basic_stringstream(
ios_base::openmode which = ios_base::out|ios_base::in);
explicit basic_stringstream(
const basic_string<charT,traits,Allocator>& str,
ios_base::openmode which = ios_base::out|ios_base::in);
basic_stringstream(const basic_stringstream& rhs) = delete;
basic_stringstream(basic_stringstream&& rhs);
// [stringstream.assign] Assign/swap:
basic_stringstream& operator=(const basic_stringstream& rhs) = delete;
basic_stringstream& operator=(basic_stringstream&& rhs);
void swap(basic_stringstream& rhs);
// Members:
basic_stringbuf<charT,traits,Allocator>* rdbuf() const;
basic_string<charT,traits,Allocator> str() const;
void str(const basic_string<charT,traits,Allocator>& str);
private:
basic_stringbuf<charT, traits> sb; // exposition only
};
template <class charT, class traits, class Allocator>
void swap(basic_stringstream<charT, traits, Allocator>& x,
basic_stringstream<charT, traits, Allocator>& y);
}
The class template basic_stringstream<charT, traits> supports reading and writing from objects of class basic_string<charT, traits, Allocator>. It uses a basic_stringbuf<charT, traits, Allocator> object to control the associated sequence. For the sake of exposition, the maintained data is presented here as
sb, the stringbuf object.