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Standard library header <sstream>

From cppreference.com
< cpp‎ | header
 
 
 

This header is part of the Input/Output library.

Contents

Classes

implements raw string device
(class template) [edit]
implements high-level string stream input operations
(class template) [edit]
implements high-level string stream output operations
(class template) [edit]
implements high-level string stream input/output operations
(class template) [edit]
stringbuf std::basic_stringbuf<char>
(typedef)
wstringbuf std::basic_stringbuf<wchar_t>
(typedef)
istringstream std::basic_istringstream<char>
(typedef)
wistringstream std::basic_istringstream<wchar_t>
(typedef)
ostringstream std::basic_ostringstream<char>
(typedef)
wostringstream std::basic_ostringstream<wchar_t>
(typedef)
stringstream std::basic_stringstream<char>
(typedef)
wstringstream std::basic_stringstream<wchar_t>
(typedef)

Functions

specializes the std::swap algorithm
(function template) [edit]
specializes the std::swap algorithm
(function template) [edit]
specializes the std::swap algorithm
(function template) [edit]
specializes the std::swap algorithm
(function template) [edit]

[edit] Synopsis

namespace std {
  template<class CharT, class Traits = char_traits<CharT>,
           class Allocator = allocator<CharT>>
    class basic_stringbuf;
 
  using stringbuf  = basic_stringbuf<char>;
  using wstringbuf = basic_stringbuf<wchar_t>;
 
  template<class CharT, class Traits = char_traits<CharT>,
           class Allocator = allocator<CharT>>
    class basic_istringstream;
 
  using istringstream  = basic_istringstream<char>;
  using wistringstream = basic_istringstream<wchar_t>;
 
  template<class CharT, class Traits = char_traits<CharT>,
           class Allocator = allocator<CharT>>
    class basic_ostringstream;
  using ostringstream  = basic_ostringstream<char>;
  using wostringstream = basic_ostringstream<wchar_t>;
 
  template<class CharT, class Traits = char_traits<CharT>,
           class Allocator = allocator<CharT>>
    class basic_stringstream;
  using stringstream  = basic_stringstream<char>;
  using wstringstream = basic_stringstream<wchar_t>;
}

[edit] Class template std::basic_stringbuf

namespace std {
  template<class CharT, class Traits = char_traits<CharT>,
           class Allocator = allocator<CharT>>
  class basic_stringbuf : public basic_streambuf<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;
 
    // constructors
    basic_stringbuf() : basic_stringbuf(ios_base::in | ios_base::out) {}
    explicit basic_stringbuf(ios_base::openmode which);
    explicit basic_stringbuf(
      const basic_string<CharT, Traits, Allocator>& s,
      ios_base::openmode which = ios_base::in | ios_base::out);
    explicit basic_stringbuf(const Allocator& a)
      : basic_stringbuf(ios_base::in | ios_base::out, a) {}
    basic_stringbuf(ios_base::openmode which, const Allocator& a);
    explicit basic_stringbuf(
      basic_string<CharT, Traits, Allocator>&& s,
      ios_base::openmode which = ios_base::in | ios_base::out);
    template<class SAlloc>
      basic_stringbuf(
        const basic_string<CharT, Traits, SAlloc>& s, const Allocator& a)
        : basic_stringbuf(s, ios_base::in | ios_base::out, a) {}
    template<class SAlloc>
      basic_stringbuf(
        const basic_string<CharT, Traits, SAlloc>& s,
        ios_base::openmode which, const Allocator& a);
    template<class SAlloc>
      explicit basic_stringbuf(
        const basic_string<CharT, Traits, SAlloc>& s,
        ios_base::openmode which = ios_base::in | ios_base::out);
    basic_stringbuf(const basic_stringbuf&) = delete;
    basic_stringbuf(basic_stringbuf&& rhs);
    basic_stringbuf(basic_stringbuf&& rhs, const Allocator& a);
 
    // assign and swap
    basic_stringbuf& operator=(const basic_stringbuf&) = delete;
    basic_stringbuf& operator=(basic_stringbuf&& rhs);
    void swap(basic_stringbuf& rhs) noexcept(see below);
 
    // getters and setters
    allocator_type get_allocator() const noexcept;
 
    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);
 
  protected:
    // overridden virtual functions
    int_type underflow() override;
    int_type pbackfail(int_type c = Traits::eof()) override;
    int_type overflow (int_type c = Traits::eof()) override;
    basic_streambuf<CharT, Traits>* setbuf(CharT*, streamsize) override;
 
    pos_type seekoff(off_type off, ios_base::seekdir way,
                     ios_base::openmode which
                      = ios_base::in | ios_base::out) override;
    pos_type seekpos(pos_type sp,
                     ios_base::openmode which
                      = ios_base::in | ios_base::out) override;
 
  private:
    ios_base::openmode mode;                        // exposition only
    basic_string<CharT, Traits, Allocator> buf;     // exposition only
    void init_buf_ptrs();                           // exposition only
  };
 
  template<class CharT, class Traits, class Allocator>
    void swap(basic_stringbuf<CharT, Traits, Allocator>& x,
              basic_stringbuf<CharT, Traits, Allocator>& y) noexcept(noexcept(x.swap(y)));
}

[edit] Class template std::basic_istringstream

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;
 
    // constructors
    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);
 
    // assign and swap
    basic_istringstream& operator=(const basic_istringstream&) = delete;
    basic_istringstream& operator=(basic_istringstream&& rhs);
    void swap(basic_istringstream& rhs);
 
    // members
    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;   // exposition only
  };
 
  template<class CharT, class Traits, class Allocator>
    void swap(basic_istringstream<CharT, Traits, Allocator>& x,
              basic_istringstream<CharT, Traits, Allocator>& y);
}

[edit] Class template std::basic_ostringstream

namespace std {
  template<class CharT, class Traits = char_traits<CharT>,
           class Allocator = allocator<CharT>>
  class basic_ostringstream : 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;
    using allocator_type = Allocator;
 
    // constructors
    basic_ostringstream() : basic_ostringstream(ios_base::out) {}
    explicit basic_ostringstream(ios_base::openmode which);
    explicit basic_ostringstream(
      const basic_string<CharT, Traits, Allocator>& s,
      ios_base::openmode which = ios_base::out);
    basic_ostringstream(ios_base::openmode which, const Allocator& a);
    explicit basic_ostringstream(
      basic_string<CharT, Traits, Allocator>&& s,
      ios_base::openmode which = ios_base::out);
    template<class SAlloc>
      basic_ostringstream(
        const basic_string<CharT, Traits, SAlloc>& s, const Allocator& a)
        : basic_ostringstream(s, ios_base::out, a) {}
    template<class SAlloc>
      basic_ostringstream(
        const basic_string<CharT, Traits, SAlloc>& s,
        ios_base::openmode which, const Allocator& a);
    template<class SAlloc>
      explicit basic_ostringstream(
        const basic_string<CharT, Traits, SAlloc>& s,
        ios_base::openmode which = ios_base::out);
    basic_ostringstream(const basic_ostringstream&) = delete;
    basic_ostringstream(basic_ostringstream&& rhs);
 
    // assign and swap
    basic_ostringstream& operator=(const basic_ostringstream&) = delete;
    basic_ostringstream& operator=(basic_ostringstream&& rhs);
    void swap(basic_ostringstream& rhs);
 
    // members
    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;   // exposition only
  };
 
  template<class CharT, class Traits, class Allocator>
    void swap(basic_ostringstream<CharT, Traits, Allocator>& x,
              basic_ostringstream<CharT, Traits, Allocator>& y);
}

[edit] Class template std::basic_stringstream

namespace std {
  template<class CharT, class Traits = char_traits<CharT>,
           class Allocator = allocator<CharT>>
  class basic_stringstream : public basic_iostream<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;
 
    // constructors
    basic_stringstream() : basic_stringstream(ios_base::out | ios_base::in) {}
    explicit basic_stringstream(ios_base::openmode which);
    explicit basic_stringstream(
      const basic_string<CharT, Traits, Allocator>& s,
      ios_base::openmode which = ios_base::out | ios_base::in);
    basic_stringstream(ios_base::openmode which, const Allocator& a);
    explicit basic_stringstream(
      basic_string<CharT, Traits, Allocator>&& s,
      ios_base::openmode which = ios_base::out | ios_base::in);
    template<class SAlloc>
      basic_stringstream(
        const basic_string<CharT, Traits, SAlloc>& s, const Allocator& a)
        : basic_stringstream(s, ios_base::out | ios_base::in, a) {}
    template<class SAlloc>
      basic_stringstream(
        const basic_string<CharT, Traits, SAlloc>& s,
        ios_base::openmode which, const Allocator& a);
    template<class SAlloc>
      explicit basic_stringstream(
        const basic_string<CharT, Traits, SAlloc>& s,
        ios_base::openmode which = ios_base::out | ios_base::in);
    basic_stringstream(const basic_stringstream&) = delete;
    basic_stringstream(basic_stringstream&& rhs);
 
    // assign and swap
    basic_stringstream& operator=(const basic_stringstream&) = 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 &;
    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> sb;  // exposition only
  };
 
  template<class CharT, class Traits, class Allocator>
    void swap(basic_stringstream<CharT, Traits, Allocator>& x,
              basic_stringstream<CharT, Traits, Allocator>& y);
}