vstring.tcc

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// Versatile string -*- C++ -*-

// Copyright (C) 2005 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 2, 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.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

#ifndef _VSTRING_TCC
#define _VSTRING_TCC 1

#pragma GCC system_header

namespace __gnu_cxx
{
  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    const typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::npos;

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    void
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    resize(size_type __n, _CharT __c)
    {
      const size_type __size = this->size();
      if (__size < __n)
    this->append(__n - __size, __c);
      else if (__n < __size)
    this->_M_erase(__n, __size - __n);
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>&
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    _M_append(const _CharT* __s, size_type __n)
    {
      const size_type __len = __n + this->size();

      if (__len <= this->capacity() && !this->_M_is_shared())
    {
      if (__n)
        this->_S_copy(this->_M_data() + this->size(), __s, __n);
    }
      else
    this->_M_mutate(this->size(), size_type(0), __s, __n);

      this->_M_set_length(__len);
      return *this;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    template<typename _InputIterator>
      __versa_string<_CharT, _Traits, _Alloc, _Base>&
      __versa_string<_CharT, _Traits, _Alloc, _Base>::
      _M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
              _InputIterator __k2, __false_type)
      {
    const __versa_string __s(__k1, __k2);
    const size_type __n1 = __i2 - __i1;
    return _M_replace(__i1 - _M_ibegin(), __n1, __s._M_data(),
              __s.size());
      }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>&
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
           _CharT __c)
    {
      _M_check_length(__n1, __n2, "__versa_string::_M_replace_aux");

      const size_type __old_size = this->size();
      const size_type __new_size = __old_size + __n2 - __n1;

      if (__new_size <= this->capacity() && !this->_M_is_shared())
    {
      _CharT* __p = this->_M_data() + __pos1;

      const size_type __how_much = __old_size - __pos1 - __n1;
      if (__how_much && __n1 != __n2)
        this->_S_move(__p + __n2, __p + __n1, __how_much);
    }
      else
    this->_M_mutate(__pos1, __n1, 0, __n2);

      if (__n2)
    this->_S_assign(this->_M_data() + __pos1, __n2, __c);

      this->_M_set_length(__new_size);
      return *this;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>&
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    _M_replace(size_type __pos, size_type __len1, const _CharT* __s,
           const size_type __len2)
    {
      _M_check_length(__len1, __len2, "__versa_string::_M_replace");

      const size_type __old_size = this->size();
      const size_type __new_size = __old_size + __len2 - __len1;
      
      if (__new_size <= this->capacity() && !this->_M_is_shared())
    {
      _CharT* __p = this->_M_data() + __pos;

      const size_type __how_much = __old_size - __pos - __len1;
      if (_M_disjunct(__s))
        {
          if (__how_much && __len1 != __len2)
        this->_S_move(__p + __len2, __p + __len1, __how_much);
          if (__len2)
        this->_S_copy(__p, __s, __len2);
        }
      else
        {
          // Work in-place.
          if (__len2 && __len2 <= __len1)
        this->_S_move(__p, __s, __len2);
          if (__how_much && __len1 != __len2)
        this->_S_move(__p + __len2, __p + __len1, __how_much);
          if (__len2 > __len1)
        {
          if (__s + __len2 <= __p + __len1)
            this->_S_move(__p, __s, __len2);
          else if (__s >= __p + __len1)
            this->_S_copy(__p, __s + __len2 - __len1, __len2);
          else
            {
              const size_type __nleft = (__p + __len1) - __s;
              this->_S_move(__p, __s, __nleft);
              this->_S_copy(__p + __nleft, __p + __len2,
                    __len2 - __nleft);
            }
        }
        }
    }
      else
    this->_M_mutate(__pos, __len1, __s, __len2);

      this->_M_set_length(__new_size);
      return *this;
    }
  
  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>
    operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
          const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
    {
      __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
      __str.reserve(__lhs.size() + __rhs.size());
      __str.append(__lhs);
      __str.append(__rhs);
      return __str;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>
    operator+(const _CharT* __lhs,
          const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
    {
      __glibcxx_requires_string(__lhs);
      typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type;
      typedef typename __string_type::size_type   __size_type;
      const __size_type __len = _Traits::length(__lhs);
      __string_type __str;
      __str.reserve(__len + __rhs.size());
      __str.append(__lhs, __len);
      __str.append(__rhs);
      return __str;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>
    operator+(_CharT __lhs,
          const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
    {
      __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
      __str.reserve(__rhs.size() + 1);
      __str.push_back(__lhs);
      __str.append(__rhs);
      return __str;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>
    operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
          const _CharT* __rhs)
    {
      __glibcxx_requires_string(__rhs);
      typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type;
      typedef typename __string_type::size_type   __size_type;
      const __size_type __len = _Traits::length(__rhs);
      __string_type __str;
      __str.reserve(__lhs.size() + __len);
      __str.append(__lhs);
      __str.append(__rhs, __len);
      return __str;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>
    operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
          _CharT __rhs)
    {
      __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
      __str.reserve(__lhs.size() + 1);
      __str.append(__lhs);
      __str.push_back(__rhs);
      return __str;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    copy(_CharT* __s, size_type __n, size_type __pos) const
    {
      _M_check(__pos, "__versa_string::copy");
      __n = _M_limit(__pos, __n);
      __glibcxx_requires_string_len(__s, __n);
      if (__n)
    this->_S_copy(__s, this->_M_data() + __pos, __n);
      // 21.3.5.7 par 3: do not append null.  (good.)
      return __n;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    find(const _CharT* __s, size_type __pos, size_type __n) const
    {
      __glibcxx_requires_string_len(__s, __n);
      size_type __ret = npos;
      const size_type __size = this->size();
      if (__pos + __n <= __size)
    {
      const _CharT* __data = this->_M_data();
      const _CharT* __p = std::search(__data + __pos, __data + __size,
                      __s, __s + __n, traits_type::eq);
      if (__p != __data + __size || __n == 0)
        __ret = __p - __data;
    }
      return __ret;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    find(_CharT __c, size_type __pos) const
    {
      size_type __ret = npos;
      const size_type __size = this->size();
      if (__pos < __size)
    {
      const _CharT* __data = this->_M_data();
      const size_type __n = __size - __pos;
      const _CharT* __p = traits_type::find(__data + __pos, __n, __c);
      if (__p)
        __ret = __p - __data;
    }
      return __ret;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    rfind(const _CharT* __s, size_type __pos, size_type __n) const
    {
      __glibcxx_requires_string_len(__s, __n);
      const size_type __size = this->size();
      if (__n <= __size)
    {
      __pos = std::min(size_type(__size - __n), __pos);
      const _CharT* __data = this->_M_data();
      do
        {
          if (traits_type::compare(__data + __pos, __s, __n) == 0)
        return __pos;
        }
      while (__pos-- > 0);
    }
      return npos;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    rfind(_CharT __c, size_type __pos) const
    {
      size_type __size = this->size();
      if (__size)
    {
      if (--__size > __pos)
        __size = __pos;
      for (++__size; __size-- > 0; )
        if (traits_type::eq(this->_M_data()[__size], __c))
          return __size;
    }
      return npos;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
    {
      __glibcxx_requires_string_len(__s, __n);
      for (; __n && __pos < this->size(); ++__pos)
    {
      const _CharT* __p = traits_type::find(__s, __n,
                        this->_M_data()[__pos]);
      if (__p)
        return __pos;
    }
      return npos;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    find_last_of(const _CharT* __s, size_type __pos, size_type __n) const
    {
      __glibcxx_requires_string_len(__s, __n);
      size_type __size = this->size();
      if (__size && __n)
    {
      if (--__size > __pos)
        __size = __pos;
      do
        {
          if (traits_type::find(__s, __n, this->_M_data()[__size]))
        return __size;
        }
      while (__size-- != 0);
    }
      return npos;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    find_first_not_of(const _CharT* __s, size_type __pos, size_type __n) const
    {
      __glibcxx_requires_string_len(__s, __n);
      for (; __pos < this->size(); ++__pos)
    if (!traits_type::find(__s, __n, this->_M_data()[__pos]))
      return __pos;
      return npos;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    find_first_not_of(_CharT __c, size_type __pos) const
    {
      for (; __pos < this->size(); ++__pos)
    if (!traits_type::eq(this->_M_data()[__pos], __c))
      return __pos;
      return npos;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    find_last_not_of(const _CharT* __s, size_type __pos, size_type __n) const
    {
      __glibcxx_requires_string_len(__s, __n);
      size_type __size = this->size();
      if (__size)
    {
      if (--__size > __pos)
        __size = __pos;
      do
        {
          if (!traits_type::find(__s, __n, this->_M_data()[__size]))
        return __size;
        }
      while (__size--);
    }
      return npos;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    find_last_not_of(_CharT __c, size_type __pos) const
    {
      size_type __size = this->size();
      if (__size)
    {
      if (--__size > __pos)
        __size = __pos;
      do
        {
          if (!traits_type::eq(this->_M_data()[__size], __c))
        return __size;
        }
      while (__size--);
    }
      return npos;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    int
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    compare(size_type __pos, size_type __n, const __versa_string& __str) const
    {
      _M_check(__pos, "__versa_string::compare");
      __n = _M_limit(__pos, __n);
      const size_type __osize = __str.size();
      const size_type __len = std::min(__n, __osize);
      int __r = traits_type::compare(this->_M_data() + __pos,
                     __str.data(), __len);
      if (!__r)
    __r = __n - __osize;
      return __r;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    int
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    compare(size_type __pos1, size_type __n1, const __versa_string& __str,
        size_type __pos2, size_type __n2) const
    {
      _M_check(__pos1, "__versa_string::compare");
      __str._M_check(__pos2, "__versa_string::compare");
      __n1 = _M_limit(__pos1, __n1);
      __n2 = __str._M_limit(__pos2, __n2);
      const size_type __len = std::min(__n1, __n2);
      int __r = traits_type::compare(this->_M_data() + __pos1,
                     __str.data() + __pos2, __len);
      if (!__r)
    __r = __n1 - __n2;
      return __r;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    int
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    compare(const _CharT* __s) const
    {
      __glibcxx_requires_string(__s);
      const size_type __size = this->size();
      const size_type __osize = traits_type::length(__s);
      const size_type __len = std::min(__size, __osize);
      int __r = traits_type::compare(this->_M_data(), __s, __len);
      if (!__r)
    __r = __size - __osize;
      return __r;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    int
    __versa_string <_CharT, _Traits, _Alloc, _Base>::
    compare(size_type __pos, size_type __n1, const _CharT* __s) const
    {
      __glibcxx_requires_string(__s);
      _M_check(__pos, "__versa_string::compare");
      __n1 = _M_limit(__pos, __n1);
      const size_type __osize = traits_type::length(__s);
      const size_type __len = std::min(__n1, __osize);
      int __r = traits_type::compare(this->_M_data() + __pos, __s, __len);
      if (!__r)
    __r = __n1 - __osize;
      return __r;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
       template <typename, typename, typename> class _Base>
    int
    __versa_string <_CharT, _Traits, _Alloc, _Base>::
    compare(size_type __pos, size_type __n1, const _CharT* __s,
        size_type __n2) const
    {
      __glibcxx_requires_string_len(__s, __n2);
      _M_check(__pos, "__versa_string::compare");
      __n1 = _M_limit(__pos, __n1);
      const size_type __len = std::min(__n1, __n2);
      int __r = traits_type::compare(this->_M_data() + __pos, __s, __len);
      if (!__r)
    __r = __n1 - __n2;
      return __r;
    }

} // namespace __gnu_cxx

namespace std
{
  template<typename _CharT, typename _Traits, typename _Alloc,
           template <typename, typename, typename> class _Base>
    basic_istream<_CharT, _Traits>&
    operator>>(basic_istream<_CharT, _Traits>& __in,
           __gnu_cxx::__versa_string<_CharT, _Traits,
                                     _Alloc, _Base>& __str)
    {
      typedef basic_istream<_CharT, _Traits>            __istream_type;
      typedef typename __istream_type::int_type     __int_type;
      typedef typename __istream_type::__streambuf_type __streambuf_type;
      typedef typename __istream_type::__ctype_type __ctype_type;
      typedef __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>
                                                    __string_type;
      typedef typename __string_type::size_type     __size_type;

      __size_type __extracted = 0;
      ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
      typename __istream_type::sentry __cerb(__in, false);
      if (__cerb)
    {
      try
        {
          // Avoid reallocation for common case.
          __str.erase();
          _CharT __buf[128];
          __size_type __len = 0;
          const streamsize __w = __in.width();
          const __size_type __n = __w > 0 ? static_cast<__size_type>(__w)
                                      : __str.max_size();
          const __ctype_type& __ct = use_facet<__ctype_type>(__in.getloc());
          const __int_type __eof = _Traits::eof();
          __streambuf_type* __sb = __in.rdbuf();
          __int_type __c = __sb->sgetc();

          while (__extracted < __n
             && !_Traits::eq_int_type(__c, __eof)
             && !__ct.is(ctype_base::space, _Traits::to_char_type(__c)))
        {
          if (__len == sizeof(__buf) / sizeof(_CharT))
            {
              __str.append(__buf, sizeof(__buf) / sizeof(_CharT));
              __len = 0;
            }
          __buf[__len++] = _Traits::to_char_type(__c);
          ++__extracted;
          __c = __sb->snextc();
        }
          __str.append(__buf, __len);

          if (_Traits::eq_int_type(__c, __eof))
        __err |= ios_base::eofbit;
          __in.width(0);
        }
      catch(...)
        {
          // _GLIBCXX_RESOLVE_LIB_DEFECTS
          // 91. Description of operator>> and getline() for string<>
          // might cause endless loop
          __in._M_setstate(ios_base::badbit);
        }
    }
      // 211.  operator>>(istream&, string&) doesn't set failbit
      if (!__extracted)
    __err |= ios_base::failbit;
      if (__err)
    __in.setstate(__err);
      return __in;
    }      

  template<typename _CharT, typename _Traits, typename _Alloc,
           template <typename, typename, typename> class _Base>
    basic_ostream<_CharT, _Traits>&
    operator<<(basic_ostream<_CharT, _Traits>& __out,
           const __gnu_cxx::__versa_string<_CharT, _Traits,
                                           _Alloc, _Base>& __str)
    {
      typedef basic_ostream<_CharT, _Traits>            __ostream_type;

      typename __ostream_type::sentry __cerb(__out);
      if (__cerb)
    {
      const streamsize __w = __out.width();
      streamsize __len = static_cast<streamsize>(__str.size());
      const _CharT* __s = __str.data();

      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 25. String operator<< uses width() value wrong
      if (__w > __len)
        {
          _CharT* __cs = (static_cast<
                  _CharT*>(__builtin_alloca(sizeof(_CharT) * __w)));
          __pad<_CharT, _Traits>::_S_pad(__out, __out.fill(), __cs,
                         __s, __w, __len, false);
          __s = __cs;
          __len = __w;
        }
      __out._M_write(__s, __len);
      __out.width(0);
    }
      return __out;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
           template <typename, typename, typename> class _Base>
    basic_istream<_CharT, _Traits>&
    getline(basic_istream<_CharT, _Traits>& __in,
        __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>& __str,
        _CharT __delim)
    {
      typedef basic_istream<_CharT, _Traits>            __istream_type;
      typedef typename __istream_type::int_type     __int_type;
      typedef typename __istream_type::__streambuf_type __streambuf_type;
      typedef typename __istream_type::__ctype_type __ctype_type;
      typedef __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>
                                                    __string_type;
      typedef typename __string_type::size_type     __size_type;

      __size_type __extracted = 0;
      const __size_type __n = __str.max_size();
      ios_base::iostate __err = ios_base::iostate(ios_base::goodbit);
      typename __istream_type::sentry __cerb(__in, true);
      if (__cerb)
    {
      try
        {
          // Avoid reallocation for common case.
          __str.erase();
          _CharT __buf[128];
          __size_type __len = 0;
          const __int_type __idelim = _Traits::to_int_type(__delim);
          const __int_type __eof = _Traits::eof();
          __streambuf_type* __sb = __in.rdbuf();
          __int_type __c = __sb->sgetc();

          while (__extracted < __n
             && !_Traits::eq_int_type(__c, __eof)
             && !_Traits::eq_int_type(__c, __idelim))
        {
          if (__len == sizeof(__buf) / sizeof(_CharT))
            {
              __str.append(__buf, sizeof(__buf) / sizeof(_CharT));
              __len = 0;
            }
          __buf[__len++] = _Traits::to_char_type(__c);
          ++__extracted;
          __c = __sb->snextc();
        }
          __str.append(__buf, __len);

          if (_Traits::eq_int_type(__c, __eof))
        __err |= ios_base::eofbit;
          else if (_Traits::eq_int_type(__c, __idelim))
        {
          ++__extracted;          
          __sb->sbumpc();
        }
          else
        __err |= ios_base::failbit;
        }
      catch(...)
        {
          // _GLIBCXX_RESOLVE_LIB_DEFECTS
          // 91. Description of operator>> and getline() for string<>
          // might cause endless loop
          __in._M_setstate(ios_base::badbit);
        }
    }
      if (!__extracted)
    __err |= ios_base::failbit;
      if (__err)
    __in.setstate(__err);
      return __in;
    }      
  
} // namespace std

#endif // _VSTRING_TCC

---