Subversion Repositories Kolibri OS

// String based streams -*- C++ -*-

// Copyright (C) 1997-2015 Free Software Foundation, Inc.

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 3, or (at your option)

// any later version.

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional

// permissions described in the GCC Runtime Library Exception, version

// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and

// a copy of the GCC Runtime Library Exception along with this program;

// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

// .

/** @file include/sstream

 *  This is a Standard C++ Library header.

 */

//

// ISO C++ 14882: 27.7  String-based streams

//

#ifndef _GLIBCXX_SSTREAM

#define _GLIBCXX_SSTREAM 1

#pragma GCC system_header

#include 

#include 

namespace std _GLIBCXX_VISIBILITY(default)

{

_GLIBCXX_BEGIN_NAMESPACE_VERSION

_GLIBCXX_BEGIN_NAMESPACE_CXX11

  // [27.7.1] template class basic_stringbuf

  /**

   *  @brief  The actual work of input and output (for std::string).

   *  @ingroup io

   *

   *  @tparam _CharT  Type of character stream.

   *  @tparam _Traits  Traits for character type, defaults to

   *                   char_traits<_CharT>.

   *  @tparam _Alloc  Allocator type, defaults to allocator<_CharT>.

   *

   *  This class associates either or both of its input and output sequences

   *  with a sequence of characters, which can be initialized from, or made

   *  available as, a @c std::basic_string.  (Paraphrased from [27.7.1]/1.)

   *

   *  For this class, open modes (of type @c ios_base::openmode) have

   *  @c in set if the input sequence can be read, and @c out set if the

   *  output sequence can be written.

  */

  template

    class basic_stringbuf : public basic_streambuf<_CharT, _Traits>

    {

      struct __xfer_bufptrs;

    public:

      // Types:

      typedef _CharT 					char_type;

      typedef _Traits 					traits_type;

      // _GLIBCXX_RESOLVE_LIB_DEFECTS

      // 251. basic_stringbuf missing allocator_type

      typedef _Alloc				       	allocator_type;

      typedef typename traits_type::int_type 		int_type;

      typedef typename traits_type::pos_type 		pos_type;

      typedef typename traits_type::off_type 		off_type;

      typedef basic_streambuf  	__streambuf_type;

      typedef basic_string 	__string_type;

      typedef typename __string_type::size_type		__size_type;

    protected:

      /// Place to stash in || out || in | out settings for current stringbuf.

      ios_base::openmode 	_M_mode;

      // Data Members:

      __string_type 		_M_string;

    public:

      // Constructors:

      /**

       *  @brief  Starts with an empty string buffer.

       *  @param  __mode  Whether the buffer can read, or write, or both.

       *

       *  The default constructor initializes the parent class using its

       *  own default ctor.

      */

      explicit

      basic_stringbuf(ios_base::openmode __mode = ios_base::in | ios_base::out)

      : __streambuf_type(), _M_mode(__mode), _M_string()

      { }

      /**

       *  @brief  Starts with an existing string buffer.

       *  @param  __str  A string to copy as a starting buffer.

       *  @param  __mode  Whether the buffer can read, or write, or both.

       *

       *  This constructor initializes the parent class using its

       *  own default ctor.

      */

      explicit

      basic_stringbuf(const __string_type& __str,

		      ios_base::openmode __mode = ios_base::in | ios_base::out)

      : __streambuf_type(), _M_mode(), _M_string(__str.data(), __str.size())

      { _M_stringbuf_init(__mode); }

#if __cplusplus >= 201103L

      basic_stringbuf(const basic_stringbuf&) = delete;

      basic_stringbuf(basic_stringbuf&& __rhs)

      : basic_stringbuf(std::move(__rhs), __xfer_bufptrs(__rhs, this))

      { __rhs._M_sync(const_cast(__rhs._M_string.data()), 0, 0); }

      // 27.8.2.2 Assign and swap:

      basic_stringbuf&

      operator=(const basic_stringbuf&) = delete;

      basic_stringbuf&

      operator=(basic_stringbuf&& __rhs)

      {

	__xfer_bufptrs __st{__rhs, this};

	const __streambuf_type& __base = __rhs;

	__streambuf_type::operator=(__base);

	this->pubimbue(__rhs.getloc());

	_M_mode = __rhs._M_mode;

	_M_string = std::move(__rhs._M_string);

	__rhs._M_sync(const_cast(__rhs._M_string.data()), 0, 0);

	return *this;

      }

      void

      swap(basic_stringbuf& __rhs)

      {

	__xfer_bufptrs __l_st{*this, std::__addressof(__rhs)};

	__xfer_bufptrs __r_st{__rhs, this};

	__streambuf_type& __base = __rhs;

	__streambuf_type::swap(__base);

	__rhs.pubimbue(this->pubimbue(__rhs.getloc()));

	std::swap(_M_mode, __rhs._M_mode);

	std::swap(_M_string, __rhs._M_string);

      }

#endif

      // Get and set:

      /**

       *  @brief  Copying out the string buffer.

       *  @return  A copy of one of the underlying sequences.

       *

       *  If the buffer is only created in input mode, the underlying

       *  character sequence is equal to the input sequence; otherwise, it

       *  is equal to the output sequence. [27.7.1.2]/1

      */

      __string_type

      str() const

      {

	__string_type __ret;

	if (this->pptr())

	  {

	    // The current egptr() may not be the actual string end.

	    if (this->pptr() > this->egptr())

	      __ret = __string_type(this->pbase(), this->pptr());

	    else

 	      __ret = __string_type(this->pbase(), this->egptr());

	  }

	else

	  __ret = _M_string;

	return __ret;

      }

      /**

       *  @brief  Setting a new buffer.

       *  @param  __s  The string to use as a new sequence.

       *

       *  Deallocates any previous stored sequence, then copies @a s to

       *  use as a new one.

      */

      void

      str(const __string_type& __s)

      {

	// Cannot use _M_string = __s, since v3 strings are COW

	// (not always true now but assign() always works).

	_M_string.assign(__s.data(), __s.size());

	_M_stringbuf_init(_M_mode);

      }

    protected:

      // Common initialization code goes here.

      void

      _M_stringbuf_init(ios_base::openmode __mode)

      {

	_M_mode = __mode;

	__size_type __len = 0;

	if (_M_mode & (ios_base::ate | ios_base::app))

	  __len = _M_string.size();

	_M_sync(const_cast(_M_string.data()), 0, __len);

      }

      virtual streamsize

      showmanyc()

      {

	streamsize __ret = -1;

	if (_M_mode & ios_base::in)

	  {

	    _M_update_egptr();

	    __ret = this->egptr() - this->gptr();

	  }

	return __ret;

      }

      virtual int_type

      underflow();

      virtual int_type

      pbackfail(int_type __c = traits_type::eof());

      virtual int_type

      overflow(int_type __c = traits_type::eof());

      /**

       *  @brief  Manipulates the buffer.

       *  @param  __s  Pointer to a buffer area.

       *  @param  __n  Size of @a __s.

       *  @return  @c this

       *

       *  If no buffer has already been created, and both @a __s and @a __n are

       *  non-zero, then @c __s is used as a buffer; see

       *  https://gcc.gnu.org/onlinedocs/libstdc++/manual/streambufs.html#io.streambuf.buffering

       *  for more.

      */

      virtual __streambuf_type*

      setbuf(char_type* __s, streamsize __n)

      {

	if (__s && __n >= 0)

	  {

	    // This is implementation-defined behavior, and assumes

	    // that an external char_type array of length __n exists

	    // and has been pre-allocated. If this is not the case,

	    // things will quickly blow up.

	    // Step 1: Destroy the current internal array.

	    _M_string.clear();

	    // Step 2: Use the external array.

	    _M_sync(__s, __n, 0);

	  }

	return this;

      }

      virtual pos_type

      seekoff(off_type __off, ios_base::seekdir __way,

	      ios_base::openmode __mode = ios_base::in | ios_base::out);

      virtual pos_type

      seekpos(pos_type __sp,

	      ios_base::openmode __mode = ios_base::in | ios_base::out);

      // Internal function for correctly updating the internal buffer

      // for a particular _M_string, due to initialization or re-sizing

      // of an existing _M_string.

      void

      _M_sync(char_type* __base, __size_type __i, __size_type __o);

      // Internal function for correctly updating egptr() to the actual

      // string end.

      void

      _M_update_egptr()

      {

	const bool __testin = _M_mode & ios_base::in;

	if (this->pptr() && this->pptr() > this->egptr())

	  {

	    if (__testin)

	      this->setg(this->eback(), this->gptr(), this->pptr());

	    else

	      this->setg(this->pptr(), this->pptr(), this->pptr());

	  }

      }

      // Works around the issue with pbump, part of the protected

      // interface of basic_streambuf, taking just an int.

      void

      _M_pbump(char_type* __pbeg, char_type* __pend, off_type __off);

    private:

#if __cplusplus >= 201103L

#if _GLIBCXX_USE_CXX11_ABI

      // This type captures the state of the gptr / pptr pointers as offsets

      // so they can be restored in another object after moving the string.

      struct __xfer_bufptrs

      {

	__xfer_bufptrs(const basic_stringbuf& __from, basic_stringbuf* __to)

	: _M_to{__to}, _M_goff{-1, -1, -1}, _M_poff{-1, -1, -1}

	{

	  const _CharT* __str = __from._M_string.data();

	  if (__from.eback())

	    {

	    _M_goff[0] = __from.eback() - __str;

	    _M_goff[1] = __from.gptr() - __str;

	    _M_goff[2] = __from.egptr() - __str;

	    }

	  if (__from.pbase())

	    {

	      _M_poff[0] = __from.pbase() - __str;

	      _M_poff[1] = __from.pptr() - __from.pbase();

	      _M_poff[2] = __from.epptr() - __str;

	    }

	}

	~__xfer_bufptrs()

	{

	  char_type* __str = const_cast(_M_to->_M_string.data());

	  if (_M_goff[0] != -1)

	    _M_to->setg(__str+_M_goff[0], __str+_M_goff[1], __str+_M_goff[2]);

	  if (_M_poff[0] != -1)

	    _M_to->_M_pbump(__str+_M_poff[0], __str+_M_poff[2], _M_poff[1]);

	}

	basic_stringbuf* _M_to;

	off_type _M_goff[3];

	off_type _M_poff[3];

      };

#else

      // This type does nothing when using Copy-On-Write strings.

      struct __xfer_bufptrs

      {

	__xfer_bufptrs(const basic_stringbuf&, basic_stringbuf*) { }

      };

#endif

      // The move constructor initializes an __xfer_bufptrs temporary then

      // delegates to this constructor to performs moves during its lifetime.

      basic_stringbuf(basic_stringbuf&& __rhs, __xfer_bufptrs&&)

      : __streambuf_type(static_cast(__rhs)),

      _M_mode(__rhs._M_mode), _M_string(std::move(__rhs._M_string))

      { }

#endif

    };

  // [27.7.2] Template class basic_istringstream

  /**

   *  @brief  Controlling input for std::string.

   *  @ingroup io

   *

   *  @tparam _CharT  Type of character stream.

   *  @tparam _Traits  Traits for character type, defaults to

   *                   char_traits<_CharT>.

   *  @tparam _Alloc  Allocator type, defaults to allocator<_CharT>.

   *

   *  This class supports reading from objects of type std::basic_string,

   *  using the inherited functions from std::basic_istream.  To control

   *  the associated sequence, an instance of std::basic_stringbuf is used,

   *  which this page refers to as @c sb.

  */

  template

    class basic_istringstream : public basic_istream<_CharT, _Traits>

    {

    public:

      // Types:

      typedef _CharT 					char_type;

      typedef _Traits 					traits_type;

      // _GLIBCXX_RESOLVE_LIB_DEFECTS

      // 251. basic_stringbuf missing allocator_type

      typedef _Alloc				       	allocator_type;

      typedef typename traits_type::int_type 		int_type;

      typedef typename traits_type::pos_type 		pos_type;

      typedef typename traits_type::off_type 		off_type;

      // Non-standard types:

      typedef basic_string<_CharT, _Traits, _Alloc> 	__string_type;

      typedef basic_stringbuf<_CharT, _Traits, _Alloc> 	__stringbuf_type;

      typedef basic_istream	__istream_type;

    private:

      __stringbuf_type	_M_stringbuf;

    public:

      // Constructors:

      /**

       *  @brief  Default constructor starts with an empty string buffer.

       *  @param  __mode  Whether the buffer can read, or write, or both.

       *

       *  @c ios_base::in is automatically included in @a __mode.

       *

       *  Initializes @c sb using @c __mode|in, and passes @c &sb to the base

       *  class initializer.  Does not allocate any buffer.

       *

       *  That's a lie.  We initialize the base class with NULL, because the

       *  string class does its own memory management.

      */

      explicit

      basic_istringstream(ios_base::openmode __mode = ios_base::in)

      : __istream_type(), _M_stringbuf(__mode | ios_base::in)

      { this->init(&_M_stringbuf); }

      /**

       *  @brief  Starts with an existing string buffer.

       *  @param  __str  A string to copy as a starting buffer.

       *  @param  __mode  Whether the buffer can read, or write, or both.

       *

       *  @c ios_base::in is automatically included in @a mode.

       *

       *  Initializes @c sb using @a str and @c mode|in, and passes @c &sb

       *  to the base class initializer.

       *

       *  That's a lie.  We initialize the base class with NULL, because the

       *  string class does its own memory management.

      */

      explicit

      basic_istringstream(const __string_type& __str,

			  ios_base::openmode __mode = ios_base::in)

      : __istream_type(), _M_stringbuf(__str, __mode | ios_base::in)

      { this->init(&_M_stringbuf); }

      /**

       *  @brief  The destructor does nothing.

       *

       *  The buffer is deallocated by the stringbuf object, not the

       *  formatting stream.

      */

      ~basic_istringstream()

      { }

#if __cplusplus >= 201103L

      basic_istringstream(const basic_istringstream&) = delete;

      basic_istringstream(basic_istringstream&& __rhs)

      : __istream_type(std::move(__rhs)),

      _M_stringbuf(std::move(__rhs._M_stringbuf))

      { __istream_type::set_rdbuf(&_M_stringbuf); }

      // 27.8.3.2 Assign and swap:

      basic_istringstream&

      operator=(const basic_istringstream&) = delete;

      basic_istringstream&

      operator=(basic_istringstream&& __rhs)

      {

	__istream_type::operator=(std::move(__rhs));

	_M_stringbuf = std::move(__rhs._M_stringbuf);

	return *this;

      }

      void

      swap(basic_istringstream& __rhs)

      {

	__istream_type::swap(__rhs);

	_M_stringbuf.swap(__rhs._M_stringbuf);

      }

#endif

      // Members:

      /**

       *  @brief  Accessing the underlying buffer.

       *  @return  The current basic_stringbuf buffer.

       *

       *  This hides both signatures of std::basic_ios::rdbuf().

      */

      __stringbuf_type*

      rdbuf() const

      { return const_cast<__stringbuf_type*>(&_M_stringbuf); }

      /**

       *  @brief  Copying out the string buffer.

       *  @return  @c rdbuf()->str()

      */

      __string_type

      str() const

      { return _M_stringbuf.str(); }

      /**

       *  @brief  Setting a new buffer.

       *  @param  __s  The string to use as a new sequence.

       *

       *  Calls @c rdbuf()->str(s).

      */

      void

      str(const __string_type& __s)

      { _M_stringbuf.str(__s); }

    };

  // [27.7.3] Template class basic_ostringstream

  /**

   *  @brief  Controlling output for std::string.

   *  @ingroup io

   *

   *  @tparam _CharT  Type of character stream.

   *  @tparam _Traits  Traits for character type, defaults to

   *                   char_traits<_CharT>.

   *  @tparam _Alloc  Allocator type, defaults to allocator<_CharT>.

   *

   *  This class supports writing to objects of type std::basic_string,

   *  using the inherited functions from std::basic_ostream.  To control

   *  the associated sequence, an instance of std::basic_stringbuf is used,

   *  which this page refers to as @c sb.

  */

  template 

    class basic_ostringstream : public basic_ostream<_CharT, _Traits>

    {

    public:

      // Types:

      typedef _CharT 					char_type;

      typedef _Traits 					traits_type;

      // _GLIBCXX_RESOLVE_LIB_DEFECTS

      // 251. basic_stringbuf missing allocator_type

      typedef _Alloc				       	allocator_type;

      typedef typename traits_type::int_type 		int_type;

      typedef typename traits_type::pos_type 		pos_type;

      typedef typename traits_type::off_type 		off_type;

      // Non-standard types:

      typedef basic_string<_CharT, _Traits, _Alloc> 	__string_type;

      typedef basic_stringbuf<_CharT, _Traits, _Alloc> 	__stringbuf_type;

      typedef basic_ostream	__ostream_type;

    private:

      __stringbuf_type	_M_stringbuf;

    public:

      // Constructors/destructor:

      /**

       *  @brief  Default constructor starts with an empty string buffer.

       *  @param  __mode  Whether the buffer can read, or write, or both.

       *

       *  @c ios_base::out is automatically included in @a mode.

       *

       *  Initializes @c sb using @c mode|out, and passes @c &sb to the base

       *  class initializer.  Does not allocate any buffer.

       *

       *  That's a lie.  We initialize the base class with NULL, because the

       *  string class does its own memory management.

      */

      explicit

      basic_ostringstream(ios_base::openmode __mode = ios_base::out)

      : __ostream_type(), _M_stringbuf(__mode | ios_base::out)

      { this->init(&_M_stringbuf); }

      /**

       *  @brief  Starts with an existing string buffer.

       *  @param  __str  A string to copy as a starting buffer.

       *  @param  __mode  Whether the buffer can read, or write, or both.

       *

       *  @c ios_base::out is automatically included in @a mode.

       *

       *  Initializes @c sb using @a str and @c mode|out, and passes @c &sb

       *  to the base class initializer.

       *

       *  That's a lie.  We initialize the base class with NULL, because the

       *  string class does its own memory management.

      */

      explicit

      basic_ostringstream(const __string_type& __str,

			  ios_base::openmode __mode = ios_base::out)

      : __ostream_type(), _M_stringbuf(__str, __mode | ios_base::out)

      { this->init(&_M_stringbuf); }

      /**

       *  @brief  The destructor does nothing.

       *

       *  The buffer is deallocated by the stringbuf object, not the

       *  formatting stream.

      */

      ~basic_ostringstream()

      { }

#if __cplusplus >= 201103L

      basic_ostringstream(const basic_ostringstream&) = delete;

      basic_ostringstream(basic_ostringstream&& __rhs)

      : __ostream_type(std::move(__rhs)),

      _M_stringbuf(std::move(__rhs._M_stringbuf))

      { __ostream_type::set_rdbuf(&_M_stringbuf); }

      // 27.8.3.2 Assign and swap:

      basic_ostringstream&

      operator=(const basic_ostringstream&) = delete;

      basic_ostringstream&

      operator=(basic_ostringstream&& __rhs)

      {

	__ostream_type::operator=(std::move(__rhs));

	_M_stringbuf = std::move(__rhs._M_stringbuf);

	return *this;

      }

      void

      swap(basic_ostringstream& __rhs)

      {

	__ostream_type::swap(__rhs);

	_M_stringbuf.swap(__rhs._M_stringbuf);

      }

#endif

      // Members:

      /**

       *  @brief  Accessing the underlying buffer.

       *  @return  The current basic_stringbuf buffer.

       *

       *  This hides both signatures of std::basic_ios::rdbuf().

      */

      __stringbuf_type*

      rdbuf() const

      { return const_cast<__stringbuf_type*>(&_M_stringbuf); }

      /**

       *  @brief  Copying out the string buffer.

       *  @return  @c rdbuf()->str()

      */

      __string_type

      str() const

      { return _M_stringbuf.str(); }

      /**

       *  @brief  Setting a new buffer.

       *  @param  __s  The string to use as a new sequence.

       *

       *  Calls @c rdbuf()->str(s).

      */

      void

      str(const __string_type& __s)

      { _M_stringbuf.str(__s); }

    };

  // [27.7.4] Template class basic_stringstream

  /**

   *  @brief  Controlling input and output for std::string.

   *  @ingroup io

   *

   *  @tparam _CharT  Type of character stream.

   *  @tparam _Traits  Traits for character type, defaults to

   *                   char_traits<_CharT>.

   *  @tparam _Alloc  Allocator type, defaults to allocator<_CharT>.

   *

   *  This class supports reading from and writing to objects of type

   *  std::basic_string, using the inherited functions from

   *  std::basic_iostream.  To control the associated sequence, an instance

   *  of std::basic_stringbuf is used, which this page refers to as @c sb.

  */

  template 

    class basic_stringstream : public basic_iostream<_CharT, _Traits>

    {

    public:

      // Types:

      typedef _CharT 					char_type;

      typedef _Traits 					traits_type;

      // _GLIBCXX_RESOLVE_LIB_DEFECTS

      // 251. basic_stringbuf missing allocator_type

      typedef _Alloc				       	allocator_type;

      typedef typename traits_type::int_type 		int_type;

      typedef typename traits_type::pos_type 		pos_type;

      typedef typename traits_type::off_type 		off_type;

      // Non-standard Types:

      typedef basic_string<_CharT, _Traits, _Alloc> 	__string_type;

      typedef basic_stringbuf<_CharT, _Traits, _Alloc> 	__stringbuf_type;

      typedef basic_iostream	__iostream_type;

    private:

      __stringbuf_type	_M_stringbuf;

    public:

      // Constructors/destructors

      /**

       *  @brief  Default constructor starts with an empty string buffer.

       *  @param  __m  Whether the buffer can read, or write, or both.

       *

       *  Initializes @c sb using the mode from @c __m, and passes @c

       *  &sb to the base class initializer.  Does not allocate any

       *  buffer.

       *

       *  That's a lie.  We initialize the base class with NULL, because the

       *  string class does its own memory management.

      */

      explicit

      basic_stringstream(ios_base::openmode __m = ios_base::out | ios_base::in)

      : __iostream_type(), _M_stringbuf(__m)

      { this->init(&_M_stringbuf); }

      /**

       *  @brief  Starts with an existing string buffer.

       *  @param  __str  A string to copy as a starting buffer.

       *  @param  __m  Whether the buffer can read, or write, or both.

       *

       *  Initializes @c sb using @a __str and @c __m, and passes @c &sb

       *  to the base class initializer.

       *

       *  That's a lie.  We initialize the base class with NULL, because the

       *  string class does its own memory management.

      */

      explicit

      basic_stringstream(const __string_type& __str,

			 ios_base::openmode __m = ios_base::out | ios_base::in)

      : __iostream_type(), _M_stringbuf(__str, __m)

      { this->init(&_M_stringbuf); }

      /**

       *  @brief  The destructor does nothing.

       *

       *  The buffer is deallocated by the stringbuf object, not the

       *  formatting stream.

      */

      ~basic_stringstream()

      { }

#if __cplusplus >= 201103L

      basic_stringstream(const basic_stringstream&) = delete;

      basic_stringstream(basic_stringstream&& __rhs)

      : __iostream_type(std::move(__rhs)),

      _M_stringbuf(std::move(__rhs._M_stringbuf))

      { __iostream_type::set_rdbuf(&_M_stringbuf); }

      // 27.8.3.2 Assign and swap:

      basic_stringstream&

      operator=(const basic_stringstream&) = delete;

      basic_stringstream&

      operator=(basic_stringstream&& __rhs)

      {

	__iostream_type::operator=(std::move(__rhs));

	_M_stringbuf = std::move(__rhs._M_stringbuf);

	return *this;

      }

      void

      swap(basic_stringstream& __rhs)

      {

	__iostream_type::swap(__rhs);

	_M_stringbuf.swap(__rhs._M_stringbuf);

      }

#endif

      // Members:

      /**

       *  @brief  Accessing the underlying buffer.

       *  @return  The current basic_stringbuf buffer.

       *

       *  This hides both signatures of std::basic_ios::rdbuf().

      */

      __stringbuf_type*

      rdbuf() const

      { return const_cast<__stringbuf_type*>(&_M_stringbuf); }

      /**

       *  @brief  Copying out the string buffer.

       *  @return  @c rdbuf()->str()

      */

      __string_type

      str() const

      { return _M_stringbuf.str(); }

      /**

       *  @brief  Setting a new buffer.

       *  @param  __s  The string to use as a new sequence.

       *

       *  Calls @c rdbuf()->str(s).

      */

      void

      str(const __string_type& __s)

      { _M_stringbuf.str(__s); }

    };

#if __cplusplus >= 201103L

  /// Swap specialization for stringbufs.

  template 

    inline void

    swap(basic_stringbuf<_CharT, _Traits, _Allocator>& __x,

	 basic_stringbuf<_CharT, _Traits, _Allocator>& __y)

    { __x.swap(__y); }

  /// Swap specialization for istringstreams.

  template 

    inline void

    swap(basic_istringstream<_CharT, _Traits, _Allocator>& __x,

	 basic_istringstream<_CharT, _Traits, _Allocator>& __y)

    { __x.swap(__y); }

  /// Swap specialization for ostringstreams.

  template 

    inline void

    swap(basic_ostringstream<_CharT, _Traits, _Allocator>& __x,

	 basic_ostringstream<_CharT, _Traits, _Allocator>& __y)

    { __x.swap(__y); }

  /// Swap specialization for stringstreams.

  template 

    inline void

    swap(basic_stringstream<_CharT, _Traits, _Allocator>& __x,

	 basic_stringstream<_CharT, _Traits, _Allocator>& __y)

    { __x.swap(__y); }

#endif

_GLIBCXX_END_NAMESPACE_CXX11

_GLIBCXX_END_NAMESPACE_VERSION

} // namespace

#include 

#endif /* _GLIBCXX_SSTREAM */