namespace std {
template<class charT, class traits = char_traits<charT>,
class Allocator = allocator<charT>>
class basic_istringstream : public basic_istream<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;
using allocator_type = Allocator;
basic_istringstream() : basic_istringstream(ios_base::in) {}
explicit basic_istringstream(ios_base::openmode which);
explicit basic_istringstream(
const basic_string<charT, traits, Allocator>& s,
ios_base::openmode which = ios_base::in);
basic_istringstream(ios_base::openmode which, const Allocator& a);
explicit basic_istringstream(
basic_string<charT, traits, Allocator>&& s,
ios_base::openmode which = ios_base::in);
template<class SAlloc>
basic_istringstream(
const basic_string<charT, traits, SAlloc>& s, const Allocator& a)
: basic_istringstream(s, ios_base::in, a) {}
template<class SAlloc>
basic_istringstream(
const basic_string<charT, traits, SAlloc>& s,
ios_base::openmode which, const Allocator& a);
template<class SAlloc>
explicit basic_istringstream(
const basic_string<charT, traits, SAlloc>& s,
ios_base::openmode which = ios_base::in);
basic_istringstream(const basic_istringstream&) = delete;
basic_istringstream(basic_istringstream&& rhs);
basic_istringstream& operator=(const basic_istringstream&) = delete;
basic_istringstream& operator=(basic_istringstream&& rhs);
void swap(basic_istringstream& rhs);
basic_stringbuf<charT, traits, Allocator>* rdbuf() const;
basic_string<charT, traits, Allocator> str() const &;
template<class SAlloc>
basic_string<charT,traits,SAlloc> str(const SAlloc& sa) const;
basic_string<charT, traits, Allocator> str() &&;
basic_string_view<charT, traits> view() const noexcept;
void str(const basic_string<charT, traits, Allocator>& s);
template<class SAlloc>
void str(const basic_string<charT, traits, SAlloc>& s);
void str(basic_string<charT, traits, Allocator>&& s);
private:
basic_stringbuf<charT, traits, Allocator> sb;
};
template<class charT, class traits, class Allocator>
void swap(basic_istringstream<charT, traits, Allocator>& x,
basic_istringstream<charT, traits, Allocator>& y);
}
The class
basic_istringstream<charT, traits, Allocator>
supports reading objects of class
basic_string<charT, traits, Allocator>. It uses a
basic_stringbuf<charT, traits, Allocator>
object to control the associated storage
. For the sake of exposition, the maintained data is presented here as:
- sb, the stringbuf object.