29 Input/output library [input.output]

29.8 String-based streams [string.streams]

29.8.5 Class template basic_­stringstream [stringstream]

29.8.5.1 Constructors [stringstream.cons]

explicit basic_stringstream(ios_base::openmode which);
Effects: Initializes the base class with basic_­iostream<charT, traits>(addressof(sb)) ([iostream.cons]) and sb with basic_­stringbuf<charT, traits, Allocator>(which).
explicit basic_stringstream( const basic_string<charT, traits, Allocator>& s, ios_base::openmode which = ios_base::out | ios_base::in);
Effects: Initializes the base class with basic_­iostream<charT, traits>(addressof(sb)) ([iostream.cons]) and sb with basic_­stringbuf<charT, traits, Allocator>(s, which).
basic_stringstream(ios_base::openmode which, const Allocator& a);
Effects: Initializes the base class with basic_­iostream<charT, traits>(addressof(sb)) ([iostream.cons]) and sb with basic_­stringbuf<charT, traits, Allocator>(which, a) ([stringbuf.cons]).
explicit basic_stringstream( basic_string<charT, traits, Allocator>&& s, ios_base::openmode which = ios_base::out | ios_base::in);
Effects: Initializes the base class with basic_­iostream<charT, traits>(addressof(sb)) ([iostream.cons]) and sb with basic_­stringbuf<charT, traits, Allocator>(std​::​move(s), which) ([stringbuf.cons]).
template<class SAlloc> basic_stringstream( const basic_string<charT, traits, SAlloc>& s, ios_base::openmode which, const Allocator& a);
Effects: Initializes the base class with basic_­iostream<charT, traits>(addressof(sb)) ([iostream.cons]) and sb with basic_­stringbuf<charT, traits, Allocator>(s, which, a) ([stringbuf.cons]).
template<class SAlloc> explicit basic_stringstream( const basic_string<charT, traits, SAlloc>& s, ios_base::openmode which = ios_base::out | ios_base::in);
Constraints: is_­same_­v<SAlloc,Allocator> is false.
Effects: Initializes the base class with basic_­iostream<charT, traits>(addressof(sb)) ([iostream.cons]) and sb with basic_­stringbuf<charT, traits, Allocator>(s, which) ([stringbuf.cons]).
basic_stringstream(basic_stringstream&& rhs);
Effects: Move constructs from the rvalue rhs.
This is accomplished by move constructing the base class, and the contained basic_­stringbuf.
Next basic_­istream<charT, traits>​::​set_­rdbuf(addressof(sb)) is called to install the contained basic_­stringbuf.