31 Input/output library [input.output]

31.9 Span-based streams [span.streams]

31.9.4 Class template basic_ispanstream [ispanstream]

31.9.4.1 General [ispanstream.general]

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namespace std { template<class charT, class traits = char_traits<charT>> class basic_ispanstream : 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; // [ispanstream.cons], constructors explicit basic_ispanstream(std::span<charT> s, ios_base::openmode which = ios_base::in); basic_ispanstream(const basic_ispanstream&) = delete; basic_ispanstream(basic_ispanstream&& rhs); template<class ROS> explicit basic_ispanstream(ROS&& s); basic_ispanstream& operator=(const basic_ispanstream&) = delete; basic_ispanstream& operator=(basic_ispanstream&& rhs); // [ispanstream.swap], swap void swap(basic_ispanstream& rhs); // [ispanstream.members], member functions basic_spanbuf<charT, traits>* rdbuf() const noexcept; std::span<const charT> span() const noexcept; void span(std::span<charT> s) noexcept; template<class ROS> void span(ROS&& s) noexcept; private: basic_spanbuf<charT, traits> sb; // exposition only }; }
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[Note 1: 
Constructing an ispanstream from a string-literal includes the termination character '\0' in the underlying spanbuf.
— end note]