commit gcc-4.4.3 which is used to build gcc-4.4.3 Android toolchain in master.

The source is based on fsf gcc-4.4.3 and contains local patches which
are recorded in gcc-4.4.3/README.google.

Change-Id: Id8c6d6927df274ae9749196a1cc24dbd9abc9887

1 files changed, 2598 insertions, 0 deletions

diff --git a/gcc-4.4.3/libstdc++-v3/include/ext/vstring.h b/gcc-4.4.3/libstdc++-v3/include/ext/vstring.h
new file mode 100644
index 000000000..c7bf2d2bf
--- /dev/null
+++ b/gcc-4.4.3/libstdc++-v3/include/ext/vstring.h
@@ -0,0 +1,2598 @@
+// Versatile string -*- C++ -*-
+
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 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
+// <http://www.gnu.org/licenses/>.
+
+/** @file ext/vstring.h
+ *  This file is a GNU extension to the Standard C++ Library.
+ */
+
+#ifndef _VSTRING_H
+#define _VSTRING_H 1
+
+#pragma GCC system_header
+
+#include <initializer_list>
+#include <ext/vstring_util.h>
+#include <ext/rc_string_base.h>
+#include <ext/sso_string_base.h>
+
+#if __google_stl_debug_string && !defined(_GLIBCXX_DEBUG)
+# undef _GLIBCXX_DEBUG_ASSERT
+# undef _GLIBCXX_DEBUG_PEDASSERT
+// Perform additional checks (but only in this file).
+# define _GLIBCXX_DEBUG_ASSERT(_Condition)				\
+  if (! (_Condition)) {							\
+    char buf[512];							\
+    __builtin_snprintf(buf, sizeof(buf),				\
+		       "%s:%d: %s: Assertion '%s' failed.\n",		\
+		       __FILE__, __LINE__, __func__, # _Condition);	\
+    std::__throw_runtime_error(buf);					\
+  }
+# define _GLIBCXX_DEBUG_PEDASSERT(_Condition) _GLIBCXX_DEBUG_ASSERT(_Condition)
+#endif
+
+_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
+
+  /**
+   *  @class __versa_string vstring.h
+   *  @brief  Managing sequences of characters and character-like objects.
+   */
+
+  // Template class __versa_string
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    class __versa_string
+    : private _Base<_CharT, _Traits, _Alloc>
+    {
+      typedef _Base<_CharT, _Traits, _Alloc>                __vstring_base;      
+      typedef typename __vstring_base::_CharT_alloc_type    _CharT_alloc_type;
+
+      // Types:
+    public:
+      typedef _Traits					    traits_type;
+      typedef typename _Traits::char_type		    value_type;
+      typedef _Alloc					    allocator_type;
+      typedef typename _CharT_alloc_type::size_type	    size_type;
+      typedef typename _CharT_alloc_type::difference_type   difference_type;
+      typedef typename _CharT_alloc_type::reference	    reference;
+      typedef typename _CharT_alloc_type::const_reference   const_reference;
+      typedef typename _CharT_alloc_type::pointer	    pointer;
+      typedef typename _CharT_alloc_type::const_pointer	    const_pointer;
+      typedef __gnu_cxx::__normal_iterator<pointer, __versa_string>  iterator;
+      typedef __gnu_cxx::__normal_iterator<const_pointer, __versa_string>
+                                                            const_iterator;
+      typedef std::reverse_iterator<const_iterator>	const_reverse_iterator;
+      typedef std::reverse_iterator<iterator>		    reverse_iterator;
+
+      // Data Member (public):
+      ///  Value returned by various member functions when they fail.
+      static const size_type	npos = static_cast<size_type>(-1);
+
+    private:
+      size_type
+      _M_check(size_type __pos, const char* __s) const
+      {
+	if (__pos > this->size())
+	  std::__throw_out_of_range(__N(__s));
+	return __pos;
+      }
+
+      void
+      _M_check_length(size_type __n1, size_type __n2, const char* __s) const
+      {
+	if (this->max_size() - (this->size() - __n1) < __n2)
+	  std::__throw_length_error(__N(__s));
+      }
+
+      // NB: _M_limit doesn't check for a bad __pos value.
+      size_type
+      _M_limit(size_type __pos, size_type __off) const
+      {
+	const bool __testoff =  __off < this->size() - __pos;
+	return __testoff ? __off : this->size() - __pos;
+      }
+
+      // True if _Rep and source do not overlap.
+      bool
+      _M_disjunct(const _CharT* __s) const
+      {
+	return (std::less<const _CharT*>()(__s, this->_M_data())
+		|| std::less<const _CharT*>()(this->_M_data()
+					      + this->size(), __s));
+      }
+
+      // For the internal use we have functions similar to `begin'/`end'
+      // but they do not call _M_leak.
+      iterator
+      _M_ibegin() const
+      { return iterator(this->_M_data()); }
+
+      iterator
+      _M_iend() const
+      { return iterator(this->_M_data() + this->_M_length()); }
+
+    public:
+      // Construct/copy/destroy:
+      // NB: We overload ctors in some cases instead of using default
+      // arguments, per 17.4.4.4 para. 2 item 2.
+
+      /**
+       *  @brief  Default constructor creates an empty string.
+       */
+      __versa_string()
+      : __vstring_base() { }
+      
+      /**
+       *  @brief  Construct an empty string using allocator @a a.
+       */
+      explicit
+      __versa_string(const _Alloc& __a)
+      : __vstring_base(__a) { }
+
+      // NB: per LWG issue 42, semantics different from IS:
+      /**
+       *  @brief  Construct string with copy of value of @a str.
+       *  @param  __str  Source string.
+       */
+      __versa_string(const __versa_string& __str)
+      : __vstring_base(__str) { }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      /**
+       *  @brief  String move constructor.
+       *  @param  __str  Source string.
+       *
+       *  The newly-constructed %string contains the exact contents of
+       *  @a str.  The contents of @a str are a valid, but unspecified
+       *  string.
+       */
+      __versa_string(__versa_string&& __str)
+      : __vstring_base(std::forward<__vstring_base>(__str)) { }
+
+      /**
+       *  @brief  Construct string from an initializer list.
+       *  @param  __l  std::initializer_list of characters.
+       *  @param  __a  Allocator to use (default is default allocator).
+       */
+      __versa_string(std::initializer_list<_CharT> __l,
+		     const _Alloc& __a = _Alloc())
+      : __vstring_base(__l.begin(), __l.end(), __a) { }
+#endif
+
+      /**
+       *  @brief  Construct string as copy of a substring.
+       *  @param  __str  Source string.
+       *  @param  __pos  Index of first character to copy from.
+       *  @param  __n  Number of characters to copy (default remainder).
+       */
+      __versa_string(const __versa_string& __str, size_type __pos,
+		     size_type __n = npos)
+      : __vstring_base(__str._M_data()
+		       + __str._M_check(__pos,
+					"__versa_string::__versa_string"),
+		       __str._M_data() + __str._M_limit(__pos, __n)
+		       + __pos, _Alloc()) { }
+
+      /**
+       *  @brief  Construct string as copy of a substring.
+       *  @param  __str  Source string.
+       *  @param  __pos  Index of first character to copy from.
+       *  @param  __n  Number of characters to copy.
+       *  @param  __a  Allocator to use.
+       */
+      __versa_string(const __versa_string& __str, size_type __pos,
+		     size_type __n, const _Alloc& __a)
+      : __vstring_base(__str._M_data()
+		       + __str._M_check(__pos,
+					"__versa_string::__versa_string"),
+		       __str._M_data() + __str._M_limit(__pos, __n)
+		       + __pos, __a) { }
+
+      /**
+       *  @brief  Construct string initialized by a character array.
+       *  @param  __s  Source character array.
+       *  @param  __n  Number of characters to copy.
+       *  @param  __a  Allocator to use (default is default allocator).
+       *
+       *  NB: @a __s must have at least @a __n characters, '\\0' has no special
+       *  meaning.
+       */
+      __versa_string(const _CharT* __s, size_type __n,
+		     const _Alloc& __a = _Alloc())
+      : __vstring_base(__s, __s + __n, __a) { }
+
+      /**
+       *  @brief  Construct string as copy of a C string.
+       *  @param  __s  Source C string.
+       *  @param  __a  Allocator to use (default is default allocator).
+       */
+      __versa_string(const _CharT* __s, const _Alloc& __a = _Alloc())
+      : __vstring_base(__s, __s ? __s + traits_type::length(__s) :
+		       __s + npos, __a) { }
+
+      /**
+       *  @brief  Construct string as multiple characters.
+       *  @param  __n  Number of characters.
+       *  @param  __c  Character to use.
+       *  @param  __a  Allocator to use (default is default allocator).
+       */
+      __versa_string(size_type __n, _CharT __c, const _Alloc& __a = _Alloc())
+      : __vstring_base(__n, __c, __a) { }
+
+      /**
+       *  @brief  Construct string as copy of a range.
+       *  @param  __beg  Start of range.
+       *  @param  __end  End of range.
+       *  @param  __a  Allocator to use (default is default allocator).
+       */
+      template<class _InputIterator>
+        __versa_string(_InputIterator __beg, _InputIterator __end,
+		       const _Alloc& __a = _Alloc())
+	: __vstring_base(__beg, __end, __a) { }
+
+      /**
+       *  @brief  Destroy the string instance.
+       */
+      ~__versa_string() { }	
+
+      /**
+       *  @brief  Assign the value of @a str to this string.
+       *  @param  __str  Source string.
+       */
+      __versa_string&
+      operator=(const __versa_string& __str) 
+      { return this->assign(__str); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      /**
+       *  @brief  String move assignment operator.
+       *  @param  __str  Source string.
+       *
+       *  The contents of @a __str are moved into this string (without
+       *  copying).  @a __str is a valid, but unspecified string.
+       */
+      __versa_string&
+      operator=(__versa_string&& __str)
+      {
+	if (this != &__str)
+	  this->swap(__str);
+	return *this;
+      }
+
+      /**
+       *  @brief  Set value to string constructed from initializer list.
+       *  @param  __l  std::initializer_list.
+       */
+      __versa_string&
+      operator=(std::initializer_list<_CharT> __l)
+      {
+	this->assign(__l.begin(), __l.end());
+	return *this;
+      }
+#endif
+
+      /**
+       *  @brief  Copy contents of @a __s into this string.
+       *  @param  __s  Source null-terminated string.
+       */
+      __versa_string&
+      operator=(const _CharT* __s) 
+      { return this->assign(__s); }
+
+      /**
+       *  @brief  Set value to string of length 1.
+       *  @param  __c  Source character.
+       *
+       *  Assigning to a character makes this string length 1 and
+       *  (*this)[0] == @a __c.
+       */
+      __versa_string&
+      operator=(_CharT __c) 
+      { 
+	this->assign(1, __c); 
+	return *this;
+      }
+
+      // Iterators:
+      /**
+       *  Returns a read/write iterator that points to the first character in
+       *  the %string.  Unshares the string.
+       */
+      iterator
+      begin()
+      {
+	this->_M_leak();
+	return iterator(this->_M_data());
+      }
+
+      /**
+       *  Returns a read-only (constant) iterator that points to the first
+       *  character in the %string.
+       */
+      const_iterator
+      begin() const
+      { return const_iterator(this->_M_data()); }
+
+      /**
+       *  Returns a read/write iterator that points one past the last
+       *  character in the %string.  Unshares the string.
+       */
+      iterator
+      end()
+      {
+	this->_M_leak();
+	return iterator(this->_M_data() + this->size());
+      }
+
+      /**
+       *  Returns a read-only (constant) iterator that points one past the
+       *  last character in the %string.
+       */
+      const_iterator
+      end() const
+      { return const_iterator(this->_M_data() + this->size()); }
+
+      /**
+       *  Returns a read/write reverse iterator that points to the last
+       *  character in the %string.  Iteration is done in reverse element
+       *  order.  Unshares the string.
+       */
+      reverse_iterator
+      rbegin()
+      { return reverse_iterator(this->end()); }
+
+      /**
+       *  Returns a read-only (constant) reverse iterator that points
+       *  to the last character in the %string.  Iteration is done in
+       *  reverse element order.
+       */
+      const_reverse_iterator
+      rbegin() const
+      { return const_reverse_iterator(this->end()); }
+
+      /**
+       *  Returns a read/write reverse iterator that points to one before the
+       *  first character in the %string.  Iteration is done in reverse
+       *  element order.  Unshares the string.
+       */
+      reverse_iterator
+      rend()
+      { return reverse_iterator(this->begin()); }
+
+      /**
+       *  Returns a read-only (constant) reverse iterator that points
+       *  to one before the first character in the %string.  Iteration
+       *  is done in reverse element order.
+       */
+      const_reverse_iterator
+      rend() const
+      { return const_reverse_iterator(this->begin()); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      /**
+       *  Returns a read-only (constant) iterator that points to the first
+       *  character in the %string.
+       */
+      const_iterator
+      cbegin() const
+      { return const_iterator(this->_M_data()); }
+
+      /**
+       *  Returns a read-only (constant) iterator that points one past the
+       *  last character in the %string.
+       */
+      const_iterator
+      cend() const
+      { return const_iterator(this->_M_data() + this->size()); }
+
+      /**
+       *  Returns a read-only (constant) reverse iterator that points
+       *  to the last character in the %string.  Iteration is done in
+       *  reverse element order.
+       */
+      const_reverse_iterator
+      crbegin() const
+      { return const_reverse_iterator(this->end()); }
+
+      /**
+       *  Returns a read-only (constant) reverse iterator that points
+       *  to one before the first character in the %string.  Iteration
+       *  is done in reverse element order.
+       */
+      const_reverse_iterator
+      crend() const
+      { return const_reverse_iterator(this->begin()); }
+#endif
+
+    public:
+      // Capacity:
+      ///  Returns the number of characters in the string, not including any
+      ///  null-termination.
+      size_type
+      size() const
+      { return this->_M_length(); }
+
+      ///  Returns the number of characters in the string, not including any
+      ///  null-termination.
+      size_type
+      length() const
+      { return this->_M_length(); }
+
+      /// Returns the size() of the largest possible %string.
+      size_type
+      max_size() const
+      { return this->_M_max_size(); }
+
+      /**
+       *  @brief  Resizes the %string to the specified number of characters.
+       *  @param  __n  Number of characters the %string should contain.
+       *  @param  __c  Character to fill any new elements.
+       *
+       *  This function will %resize the %string to the specified
+       *  number of characters.  If the number is smaller than the
+       *  %string's current size the %string is truncated, otherwise
+       *  the %string is extended and new elements are set to @a __c.
+       */
+      void
+      resize(size_type __n, _CharT __c);
+
+      /**
+       *  @brief  Resizes the %string to the specified number of characters.
+       *  @param  __n  Number of characters the %string should contain.
+       *
+       *  This function will resize the %string to the specified
+       *  length.  If the new size is smaller than the %string's
+       *  current size the %string is truncated, otherwise the %string
+       *  is extended and new characters are default-constructed.  For
+       *  basic types such as char, this means setting them to 0.
+       */
+      void
+      resize(size_type __n)
+      { this->resize(__n, _CharT()); }
+
+      /**
+       *  Returns the total number of characters that the %string can
+       *  hold before needing to allocate more memory.
+       */
+      size_type
+      capacity() const
+      { return this->_M_capacity(); }
+
+      /**
+       *  @brief  Attempt to preallocate enough memory for specified number of
+       *          characters.
+       *  @param  __res_arg  Number of characters required.
+       *  @throw  std::length_error  If @a __res_arg exceeds @c max_size().
+       *
+       *  This function attempts to reserve enough memory for the
+       *  %string to hold the specified number of characters.  If the
+       *  number requested is more than max_size(), length_error is
+       *  thrown.
+       *
+       *  The advantage of this function is that if optimal code is a
+       *  necessity and the user can determine the string length that
+       *  will be required, the user can reserve the memory in
+       *  %advance, and thus prevent a possible reallocation of memory
+       *  and copying of %string data.
+       */
+      void
+      reserve(size_type __res_arg = 0)
+      { this->_M_reserve(__res_arg); }
+
+      /**
+       *  Erases the string, making it empty.
+       */
+      void
+      clear()
+      { this->_M_clear(); }
+
+      /**
+       *  Returns true if the %string is empty.  Equivalent to *this == "".
+       */
+      bool
+      empty() const
+      { return this->size() == 0; }
+
+      // Element access:
+      /**
+       *  @brief  Subscript access to the data contained in the %string.
+       *  @param  __pos  The index of the character to access.
+       *  @return  Read-only (constant) reference to the character.
+       *
+       *  This operator allows for easy, array-style, data access.
+       *  Note that data access with this operator is unchecked and
+       *  out_of_range lookups are not defined. (For checked lookups
+       *  see at().)
+       */
+      const_reference
+      operator[] (size_type __pos) const
+      {
+	_GLIBCXX_DEBUG_ASSERT(__pos <= this->size());
+	return this->_M_data()[__pos];
+      }
+
+      /**
+       *  @brief  Subscript access to the data contained in the %string.
+       *  @param  __pos  The index of the character to access.
+       *  @return  Read/write reference to the character.
+       *
+       *  This operator allows for easy, array-style, data access.
+       *  Note that data access with this operator is unchecked and
+       *  out_of_range lookups are not defined. (For checked lookups
+       *  see at().)  Unshares the string.
+       */
+      reference
+      operator[](size_type __pos)
+      {
+        // allow pos == size() as v3 extension:
+	_GLIBCXX_DEBUG_ASSERT(__pos <= this->size());
+        // but be strict in pedantic mode:
+	_GLIBCXX_DEBUG_PEDASSERT(__pos < this->size());
+	this->_M_leak();
+	return this->_M_data()[__pos];
+      }
+
+      /**
+       *  @brief  Provides access to the data contained in the %string.
+       *  @param __n The index of the character to access.
+       *  @return  Read-only (const) reference to the character.
+       *  @throw  std::out_of_range  If @a __n is an invalid index.
+       *
+       *  This function provides for safer data access.  The parameter
+       *  is first checked that it is in the range of the string.  The
+       *  function throws out_of_range if the check fails.
+       */
+      const_reference
+      at(size_type __n) const
+      {
+	if (__n >= this->size())
+	  std::__throw_out_of_range(__N("__versa_string::at"));
+	return this->_M_data()[__n];
+      }
+
+      /**
+       *  @brief  Provides access to the data contained in the %string.
+       *  @param __n The index of the character to access.
+       *  @return  Read/write reference to the character.
+       *  @throw  std::out_of_range  If @a __n is an invalid index.
+       *
+       *  This function provides for safer data access.  The parameter
+       *  is first checked that it is in the range of the string.  The
+       *  function throws out_of_range if the check fails.  Success
+       *  results in unsharing the string.
+       */
+      reference
+      at(size_type __n)
+      {
+	if (__n >= this->size())
+	  std::__throw_out_of_range(__N("__versa_string::at"));
+	this->_M_leak();
+	return this->_M_data()[__n];
+      }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      /**
+       *  Returns a read/write reference to the data at the first
+       *  element of the %string.
+       */
+      reference
+      front()
+      { return *begin(); }
+
+      /**
+       *  Returns a read-only (constant) reference to the data at the first
+       *  element of the %string.
+       */
+      const_reference
+      front() const
+      { return *begin(); }
+
+      /**
+       *  Returns a read/write reference to the data at the last
+       *  element of the %string.
+       */
+      reference
+      back()
+      { return *(end() - 1); }
+
+      /**
+       *  Returns a read-only (constant) reference to the data at the
+       *  last element of the %string.
+       */
+      const_reference
+      back() const
+      { return *(end() - 1); }
+#endif
+
+      // Modifiers:
+      /**
+       *  @brief  Append a string to this string.
+       *  @param __str  The string to append.
+       *  @return  Reference to this string.
+       */
+      __versa_string&
+      operator+=(const __versa_string& __str)
+      { return this->append(__str); }
+
+      /**
+       *  @brief  Append a C string.
+       *  @param __s  The C string to append.
+       *  @return  Reference to this string.
+       */
+      __versa_string&
+      operator+=(const _CharT* __s)
+      { return this->append(__s); }
+
+      /**
+       *  @brief  Append a character.
+       *  @param __c  The character to append.
+       *  @return  Reference to this string.
+       */
+      __versa_string&
+      operator+=(_CharT __c)
+      { 
+	this->push_back(__c);
+	return *this;
+      }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      /**
+       *  @brief  Append an initializer_list of characters.
+       *  @param __l  The initializer_list of characters to be appended.
+       *  @return  Reference to this string.
+       */
+      __versa_string&
+      operator+=(std::initializer_list<_CharT> __l)
+      { return this->append(__l.begin(), __l.end()); }
+#endif // __GXX_EXPERIMENTAL_CXX0X__
+
+      /**
+       *  @brief  Append a string to this string.
+       *  @param __str  The string to append.
+       *  @return  Reference to this string.
+       */
+      __versa_string&
+      append(const __versa_string& __str)
+      { return _M_append(__str._M_data(), __str.size()); }
+
+      /**
+       *  @brief  Append a substring.
+       *  @param __str  The string to append.
+       *  @param __pos  Index of the first character of str to append.
+       *  @param __n  The number of characters to append.
+       *  @return  Reference to this string.
+       *  @throw  std::out_of_range if @a pos is not a valid index.
+       *
+       *  This function appends @a __n characters from @a __str
+       *  starting at @a __pos to this string.  If @a __n is is larger
+       *  than the number of available characters in @a __str, the
+       *  remainder of @a __str is appended.
+       */
+      __versa_string&
+      append(const __versa_string& __str, size_type __pos, size_type __n)
+      { return _M_append(__str._M_data()
+			 + __str._M_check(__pos, "__versa_string::append"),
+			 __str._M_limit(__pos, __n)); }
+
+      /**
+       *  @brief  Append a C substring.
+       *  @param __s  The C string to append.
+       *  @param __n  The number of characters to append.
+       *  @return  Reference to this string.
+       */
+      __versa_string&
+      append(const _CharT* __s, size_type __n)
+      {
+	__glibcxx_requires_string_len(__s, __n);
+	_M_check_length(size_type(0), __n, "__versa_string::append");
+	return _M_append(__s, __n);
+      }
+
+      /**
+       *  @brief  Append a C string.
+       *  @param __s  The C string to append.
+       *  @return  Reference to this string.
+       */
+      __versa_string&
+      append(const _CharT* __s)
+      {
+	__glibcxx_requires_string(__s);
+	const size_type __n = traits_type::length(__s);
+	_M_check_length(size_type(0), __n, "__versa_string::append");
+	return _M_append(__s, __n);
+      }
+
+      /**
+       *  @brief  Append multiple characters.
+       *  @param __n  The number of characters to append.
+       *  @param __c  The character to use.
+       *  @return  Reference to this string.
+       *
+       *  Appends n copies of c to this string.
+       */
+      __versa_string&
+      append(size_type __n, _CharT __c)
+      { return _M_replace_aux(this->size(), size_type(0), __n, __c); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      /**
+       *  @brief  Append an initializer_list of characters.
+       *  @param __l  The initializer_list of characters to append.
+       *  @return  Reference to this string.
+       */
+      __versa_string&
+      append(std::initializer_list<_CharT> __l)
+      { return this->append(__l.begin(), __l.end()); }
+#endif // __GXX_EXPERIMENTAL_CXX0X__
+
+      /**
+       *  @brief  Append a range of characters.
+       *  @param __first  Iterator referencing the first character to append.
+       *  @param __last  Iterator marking the end of the range.
+       *  @return  Reference to this string.
+       *
+       *  Appends characters in the range [first,last) to this string.
+       */
+      template<class _InputIterator>
+        __versa_string&
+        append(_InputIterator __first, _InputIterator __last)
+        { return this->replace(_M_iend(), _M_iend(), __first, __last); }
+
+      /**
+       *  @brief  Append a single character.
+       *  @param __c  Character to append.
+       */
+      void
+      push_back(_CharT __c)
+      { 
+	const size_type __size = this->size();
+	if (__size + 1 > this->capacity() || this->_M_is_shared())
+	  this->_M_mutate(__size, size_type(0), 0, size_type(1));
+	traits_type::assign(this->_M_data()[__size], __c);
+	this->_M_set_length(__size + 1);
+      }
+
+      /**
+       *  @brief  Set value to contents of another string.
+       *  @param  __str  Source string to use.
+       *  @return  Reference to this string.
+       */
+      __versa_string&
+      assign(const __versa_string& __str)
+      {
+	this->_M_assign(__str);
+	return *this;
+      }
+
+      /**
+       *  @brief  Set value to a substring of a string.
+       *  @param __str  The string to use.
+       *  @param __pos  Index of the first character of str.
+       *  @param __n  Number of characters to use.
+       *  @return  Reference to this string.
+       *  @throw  std::out_of_range if @a __pos is not a valid index.
+       *
+       *  This function sets this string to the substring of @a __str
+       *  consisting of @a __n characters at @a __pos.  If @a __n is
+       *  is larger than the number of available characters in @a
+       *  __str, the remainder of @a __str is used.
+       */
+      __versa_string&
+      assign(const __versa_string& __str, size_type __pos, size_type __n)
+      { return _M_replace(size_type(0), this->size(), __str._M_data()
+			  + __str._M_check(__pos, "__versa_string::assign"),
+			  __str._M_limit(__pos, __n)); }
+
+      /**
+       *  @brief  Set value to a C substring.
+       *  @param __s  The C string to use.
+       *  @param __n  Number of characters to use.
+       *  @return  Reference to this string.
+       *
+       *  This function sets the value of this string to the first @a
+       *  __n characters of @a __s.  If @a __n is is larger than the
+       *  number of available characters in @a __s, the remainder of
+       *  @a __s is used.
+       */
+      __versa_string&
+      assign(const _CharT* __s, size_type __n)
+      {
+	__glibcxx_requires_string_len(__s, __n);
+	return _M_replace(size_type(0), this->size(), __s, __n);
+      }
+
+      /**
+       *  @brief  Set value to contents of a C string.
+       *  @param __s  The C string to use.
+       *  @return  Reference to this string.
+       *
+       *  This function sets the value of this string to the value of
+       *  @a __s.  The data is copied, so there is no dependence on @a
+       *  __s once the function returns.
+       */
+      __versa_string&
+      assign(const _CharT* __s)
+      {
+	__glibcxx_requires_string(__s);
+	return _M_replace(size_type(0), this->size(), __s,
+			  traits_type::length(__s));
+      }
+
+      /**
+       *  @brief  Set value to multiple characters.
+       *  @param __n  Length of the resulting string.
+       *  @param __c  The character to use.
+       *  @return  Reference to this string.
+       *
+       *  This function sets the value of this string to @a __n copies of
+       *  character @a __c.
+       */
+      __versa_string&
+      assign(size_type __n, _CharT __c)
+      { return _M_replace_aux(size_type(0), this->size(), __n, __c); }
+
+      /**
+       *  @brief  Set value to a range of characters.
+       *  @param __first  Iterator referencing the first character to append.
+       *  @param __last  Iterator marking the end of the range.
+       *  @return  Reference to this string.
+       *
+       *  Sets value of string to characters in the range
+       *  [first,last).
+      */
+      template<class _InputIterator>
+        __versa_string&
+        assign(_InputIterator __first, _InputIterator __last)
+        { return this->replace(_M_ibegin(), _M_iend(), __first, __last); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      /**
+       *  @brief  Set value to an initializer_list of characters.
+       *  @param __l  The initializer_list of characters to assign.
+       *  @return  Reference to this string.
+       */
+      __versa_string&
+      assign(std::initializer_list<_CharT> __l)
+      { return this->assign(__l.begin(), __l.end()); }
+#endif // __GXX_EXPERIMENTAL_CXX0X__
+
+      /**
+       *  @brief  Insert multiple characters.
+       *  @param __p  Iterator referencing location in string to insert at.
+       *  @param __n  Number of characters to insert
+       *  @param __c  The character to insert.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Inserts @a __n copies of character @a __c starting at the
+       *  position referenced by iterator @a __p.  If adding
+       *  characters causes the length to exceed max_size(),
+       *  length_error is thrown.  The value of the string doesn't
+       *  change if an error is thrown.
+      */
+      void
+      insert(iterator __p, size_type __n, _CharT __c)
+      {	this->replace(__p, __p, __n, __c);  }
+
+      /**
+       *  @brief  Insert a range of characters.
+       *  @param __p  Iterator referencing location in string to insert at.
+       *  @param __beg  Start of range.
+       *  @param __end  End of range.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Inserts characters in range [beg,end).  If adding characters
+       *  causes the length to exceed max_size(), length_error is
+       *  thrown.  The value of the string doesn't change if an error
+       *  is thrown.
+      */
+      template<class _InputIterator>
+        void
+        insert(iterator __p, _InputIterator __beg, _InputIterator __end)
+        { this->replace(__p, __p, __beg, __end); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      /**
+       *  @brief  Insert an initializer_list of characters.
+       *  @param __p  Iterator referencing location in string to insert at.
+       *  @param __l  The initializer_list of characters to insert.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       */
+      void
+      insert(iterator __p, std::initializer_list<_CharT> __l)
+      { this->insert(__p, __l.begin(), __l.end()); }
+#endif // __GXX_EXPERIMENTAL_CXX0X__
+
+      /**
+       *  @brief  Insert value of a string.
+       *  @param __pos1  Iterator referencing location in string to insert at.
+       *  @param __str  The string to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Inserts value of @a __str starting at @a __pos1.  If adding
+       *  characters causes the length to exceed max_size(),
+       *  length_error is thrown.  The value of the string doesn't
+       *  change if an error is thrown.
+      */
+      __versa_string&
+      insert(size_type __pos1, const __versa_string& __str)
+      { return this->replace(__pos1, size_type(0),
+			     __str._M_data(), __str.size()); }
+
+      /**
+       *  @brief  Insert a substring.
+       *  @param __pos1  Iterator referencing location in string to insert at.
+       *  @param __str  The string to insert.
+       *  @param __pos2  Start of characters in str to insert.
+       *  @param __n  Number of characters to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *  @throw  std::out_of_range  If @a __pos1 > size() or
+       *  @a __pos2 > @a __str.size().
+       *
+       *  Starting at @a __pos1, insert @a __n character of @a __str
+       *  beginning with @a __pos2.  If adding characters causes the
+       *  length to exceed max_size(), length_error is thrown.  If @a
+       *  __pos1 is beyond the end of this string or @a __pos2 is
+       *  beyond the end of @a __str, out_of_range is thrown.  The
+       *  value of the string doesn't change if an error is thrown.
+      */
+      __versa_string&
+      insert(size_type __pos1, const __versa_string& __str,
+	     size_type __pos2, size_type __n)
+      { return this->replace(__pos1, size_type(0), __str._M_data()
+			     + __str._M_check(__pos2, "__versa_string::insert"),
+			     __str._M_limit(__pos2, __n)); }
+
+      /**
+       *  @brief  Insert a C substring.
+       *  @param __pos  Iterator referencing location in string to insert at.
+       *  @param __s  The C string to insert.
+       *  @param __n  The number of characters to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *  @throw  std::out_of_range  If @a __pos is beyond the end of this
+       *  string.
+       *
+       *  Inserts the first @a __n characters of @a __s starting at @a
+       *  __pos.  If adding characters causes the length to exceed
+       *  max_size(), length_error is thrown.  If @a __pos is beyond
+       *  end(), out_of_range is thrown.  The value of the string
+       *  doesn't change if an error is thrown.
+      */
+      __versa_string&
+      insert(size_type __pos, const _CharT* __s, size_type __n)
+      { return this->replace(__pos, size_type(0), __s, __n); }
+
+      /**
+       *  @brief  Insert a C string.
+       *  @param __pos  Iterator referencing location in string to insert at.
+       *  @param __s  The C string to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *  @throw  std::out_of_range  If @a __pos is beyond the end of this
+       *  string.
+       *
+       *  Inserts the first @a __n characters of @a __s starting at @a
+       *  __pos.  If adding characters causes the length to exceed
+       *  max_size(), length_error is thrown.  If @a __pos is beyond
+       *  end(), out_of_range is thrown.  The value of the string
+       *  doesn't change if an error is thrown.
+      */
+      __versa_string&
+      insert(size_type __pos, const _CharT* __s)
+      {
+	__glibcxx_requires_string(__s);
+	return this->replace(__pos, size_type(0), __s,
+			     traits_type::length(__s));
+      }
+
+      /**
+       *  @brief  Insert multiple characters.
+       *  @param __pos  Index in string to insert at.
+       *  @param __n  Number of characters to insert
+       *  @param __c  The character to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *  @throw  std::out_of_range  If @a __pos is beyond the end of this
+       *  string.
+       *
+       *  Inserts @a __n copies of character @a __c starting at index
+       *  @a __pos.  If adding characters causes the length to exceed
+       *  max_size(), length_error is thrown.  If @a __pos > length(),
+       *  out_of_range is thrown.  The value of the string doesn't
+       *  change if an error is thrown.
+      */
+      __versa_string&
+      insert(size_type __pos, size_type __n, _CharT __c)
+      { return _M_replace_aux(_M_check(__pos, "__versa_string::insert"),
+			      size_type(0), __n, __c); }
+
+      /**
+       *  @brief  Insert one character.
+       *  @param __p  Iterator referencing position in string to insert at.
+       *  @param __c  The character to insert.
+       *  @return  Iterator referencing newly inserted char.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Inserts character @a __c at position referenced by @a __p.
+       *  If adding character causes the length to exceed max_size(),
+       *  length_error is thrown.  If @a __p is beyond end of string,
+       *  out_of_range is thrown.  The value of the string doesn't
+       *  change if an error is thrown.
+      */
+      iterator
+      insert(iterator __p, _CharT __c)
+      {
+	_GLIBCXX_DEBUG_PEDASSERT(__p >= _M_ibegin() && __p <= _M_iend());
+	const size_type __pos = __p - _M_ibegin();
+	_M_replace_aux(__pos, size_type(0), size_type(1), __c);
+	this->_M_set_leaked();
+	return iterator(this->_M_data() + __pos);
+      }
+
+      /**
+       *  @brief  Remove characters.
+       *  @param __pos  Index of first character to remove (default 0).
+       *  @param __n  Number of characters to remove (default remainder).
+       *  @return  Reference to this string.
+       *  @throw  std::out_of_range  If @a __pos is beyond the end of this
+       *  string.
+       *
+       *  Removes @a __n characters from this string starting at @a
+       *  __pos.  The length of the string is reduced by @a __n.  If
+       *  there are < @a __n characters to remove, the remainder of
+       *  the string is truncated.  If @a __p is beyond end of string,
+       *  out_of_range is thrown.  The value of the string doesn't
+       *  change if an error is thrown.
+      */
+      __versa_string&
+      erase(size_type __pos = 0, size_type __n = npos)
+      { 
+	this->_M_erase(_M_check(__pos, "__versa_string::erase"),
+		       _M_limit(__pos, __n));
+	return *this;
+      }
+
+      /**
+       *  @brief  Remove one character.
+       *  @param __position  Iterator referencing the character to remove.
+       *  @return  iterator referencing same location after removal.
+       *
+       *  Removes the character at @a __position from this string. The
+       *  value of the string doesn't change if an error is thrown.
+      */
+      iterator
+      erase(iterator __position)
+      {
+	_GLIBCXX_DEBUG_PEDASSERT(__position >= _M_ibegin()
+				 && __position < _M_iend());
+	const size_type __pos = __position - _M_ibegin();
+	this->_M_erase(__pos, size_type(1));
+	this->_M_set_leaked();
+	return iterator(this->_M_data() + __pos);
+      }
+
+      /**
+       *  @brief  Remove a range of characters.
+       *  @param __first  Iterator referencing the first character to remove.
+       *  @param __last  Iterator referencing the end of the range.
+       *  @return  Iterator referencing location of first after removal.
+       *
+       *  Removes the characters in the range [first,last) from this
+       *  string.  The value of the string doesn't change if an error
+       *  is thrown.
+      */
+      iterator
+      erase(iterator __first, iterator __last)
+      {
+	_GLIBCXX_DEBUG_PEDASSERT(__first >= _M_ibegin() && __first <= __last
+				 && __last <= _M_iend());
+        const size_type __pos = __first - _M_ibegin();
+	this->_M_erase(__pos, __last - __first);
+	this->_M_set_leaked();
+	return iterator(this->_M_data() + __pos);
+      }
+
+      /**
+       *  @brief  Replace characters with value from another string.
+       *  @param __pos  Index of first character to replace.
+       *  @param __n  Number of characters to be replaced.
+       *  @param __str  String to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::out_of_range  If @a __pos is beyond the end of this
+       *  string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Removes the characters in the range [pos,pos+n) from this
+       *  string.  In place, the value of @a __str is inserted.  If @a
+       *  __pos is beyond end of string, out_of_range is thrown.  If
+       *  the length of the result exceeds max_size(), length_error is
+       *  thrown.  The value of the string doesn't change if an error
+       *  is thrown.
+      */
+      __versa_string&
+      replace(size_type __pos, size_type __n, const __versa_string& __str)
+      { return this->replace(__pos, __n, __str._M_data(), __str.size()); }
+
+      /**
+       *  @brief  Replace characters with value from another string.
+       *  @param __pos1  Index of first character to replace.
+       *  @param __n1  Number of characters to be replaced.
+       *  @param __str  String to insert.
+       *  @param __pos2  Index of first character of str to use.
+       *  @param __n2  Number of characters from str to use.
+       *  @return  Reference to this string.
+       *  @throw  std::out_of_range  If @a __pos1 > size() or @a __pos2 >
+       *  str.size().
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Removes the characters in the range [pos1,pos1 + n) from
+       *  this string.  In place, the value of @a __str is inserted.
+       *  If @a __pos is beyond end of string, out_of_range is thrown.
+       *  If the length of the result exceeds max_size(), length_error
+       *  is thrown.  The value of the string doesn't change if an
+       *  error is thrown.
+      */
+      __versa_string&
+      replace(size_type __pos1, size_type __n1, const __versa_string& __str,
+	      size_type __pos2, size_type __n2)
+      {
+	return this->replace(__pos1, __n1, __str._M_data()
+			     + __str._M_check(__pos2,
+					      "__versa_string::replace"),
+			     __str._M_limit(__pos2, __n2));
+      }
+
+      /**
+       *  @brief  Replace characters with value of a C substring.
+       *  @param __pos  Index of first character to replace.
+       *  @param __n1  Number of characters to be replaced.
+       *  @param __s  C string to insert.
+       *  @param __n2  Number of characters from @a __s to use.
+       *  @return  Reference to this string.
+       *  @throw  std::out_of_range  If @a __pos1 > size().
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Removes the characters in the range [pos,pos + n1) from this
+       *  string.  In place, the first @a __n2 characters of @a __s
+       *  are inserted, or all of @a __s if @a __n2 is too large.  If
+       *  @a __pos is beyond end of string, out_of_range is thrown.
+       *  If the length of result exceeds max_size(), length_error is
+       *  thrown.  The value of the string doesn't change if an error
+       *  is thrown.
+      */
+      __versa_string&
+      replace(size_type __pos, size_type __n1, const _CharT* __s,
+	      size_type __n2)
+      {
+	__glibcxx_requires_string_len(__s, __n2);
+	return _M_replace(_M_check(__pos, "__versa_string::replace"),
+			  _M_limit(__pos, __n1), __s, __n2);
+      }
+
+      /**
+       *  @brief  Replace characters with value of a C string.
+       *  @param __pos  Index of first character to replace.
+       *  @param __n1  Number of characters to be replaced.
+       *  @param __s  C string to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::out_of_range  If @a __pos > size().
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Removes the characters in the range [pos,pos + n1) from this
+       *  string.  In place, the first @a __n characters of @a __s are
+       *  inserted.  If @a pos is beyond end of string, out_of_range
+       *  is thrown.  If the length of result exceeds max_size(),
+       *  length_error is thrown.  The value of the string doesn't
+       *  change if an error is thrown.
+      */
+      __versa_string&
+      replace(size_type __pos, size_type __n1, const _CharT* __s)
+      {
+	__glibcxx_requires_string(__s);
+	return this->replace(__pos, __n1, __s, traits_type::length(__s));
+      }
+
+      /**
+       *  @brief  Replace characters with multiple characters.
+       *  @param __pos  Index of first character to replace.
+       *  @param __n1  Number of characters to be replaced.
+       *  @param __n2  Number of characters to insert.
+       *  @param __c  Character to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::out_of_range  If @a __pos > size().
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Removes the characters in the range [pos,pos + n1) from this
+       *  string.  In place, @a __n2 copies of @a __c are inserted.
+       *  If @a __pos is beyond end of string, out_of_range is thrown.
+       *  If the length of result exceeds max_size(), length_error is
+       *  thrown.  The value of the string doesn't change if an error
+       *  is thrown.
+      */
+      __versa_string&
+      replace(size_type __pos, size_type __n1, size_type __n2, _CharT __c)
+      { return _M_replace_aux(_M_check(__pos, "__versa_string::replace"),
+			      _M_limit(__pos, __n1), __n2, __c); }
+
+      /**
+       *  @brief  Replace range of characters with string.
+       *  @param __i1  Iterator referencing start of range to replace.
+       *  @param __i2  Iterator referencing end of range to replace.
+       *  @param __str  String value to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Removes the characters in the range [i1,i2).  In place, the
+       *  value of @a __str is inserted.  If the length of result
+       *  exceeds max_size(), length_error is thrown.  The value of
+       *  the string doesn't change if an error is thrown.
+      */
+      __versa_string&
+      replace(iterator __i1, iterator __i2, const __versa_string& __str)
+      { return this->replace(__i1, __i2, __str._M_data(), __str.size()); }
+
+      /**
+       *  @brief  Replace range of characters with C substring.
+       *  @param __i1  Iterator referencing start of range to replace.
+       *  @param __i2  Iterator referencing end of range to replace.
+       *  @param __s  C string value to insert.
+       *  @param __n  Number of characters from s to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Removes the characters in the range [i1,i2).  In place, the
+       *  first @a n characters of @a __s are inserted.  If the length
+       *  of result exceeds max_size(), length_error is thrown.  The
+       *  value of the string doesn't change if an error is thrown.
+      */
+      __versa_string&
+      replace(iterator __i1, iterator __i2, const _CharT* __s, size_type __n)
+      {
+	_GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
+				 && __i2 <= _M_iend());
+	return this->replace(__i1 - _M_ibegin(), __i2 - __i1, __s, __n);
+      }
+
+      /**
+       *  @brief  Replace range of characters with C string.
+       *  @param __i1  Iterator referencing start of range to replace.
+       *  @param __i2  Iterator referencing end of range to replace.
+       *  @param __s  C string value to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Removes the characters in the range [i1,i2).  In place, the
+       *  characters of @a __s are inserted.  If the length of result
+       *  exceeds max_size(), length_error is thrown.  The value of
+       *  the string doesn't change if an error is thrown.
+      */
+      __versa_string&
+      replace(iterator __i1, iterator __i2, const _CharT* __s)
+      {
+	__glibcxx_requires_string(__s);
+	return this->replace(__i1, __i2, __s, traits_type::length(__s));
+      }
+
+      /**
+       *  @brief  Replace range of characters with multiple characters
+       *  @param __i1  Iterator referencing start of range to replace.
+       *  @param __i2  Iterator referencing end of range to replace.
+       *  @param __n  Number of characters to insert.
+       *  @param __c  Character to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Removes the characters in the range [i1,i2).  In place, @a
+       *  __n copies of @a __c are inserted.  If the length of result
+       *  exceeds max_size(), length_error is thrown.  The value of
+       *  the string doesn't change if an error is thrown.
+      */
+      __versa_string&
+      replace(iterator __i1, iterator __i2, size_type __n, _CharT __c)
+      {
+	_GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
+				 && __i2 <= _M_iend());
+	return _M_replace_aux(__i1 - _M_ibegin(), __i2 - __i1, __n, __c);
+      }
+
+      /**
+       *  @brief  Replace range of characters with range.
+       *  @param __i1  Iterator referencing start of range to replace.
+       *  @param __i2  Iterator referencing end of range to replace.
+       *  @param __k1  Iterator referencing start of range to insert.
+       *  @param __k2  Iterator referencing end of range to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Removes the characters in the range [i1,i2).  In place,
+       *  characters in the range [k1,k2) are inserted.  If the length
+       *  of result exceeds max_size(), length_error is thrown.  The
+       *  value of the string doesn't change if an error is thrown.
+      */
+      template<class _InputIterator>
+        __versa_string&
+        replace(iterator __i1, iterator __i2,
+		_InputIterator __k1, _InputIterator __k2)
+        {
+	  _GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
+				   && __i2 <= _M_iend());
+	  __glibcxx_requires_valid_range(__k1, __k2);
+	  typedef typename std::__is_integer<_InputIterator>::__type _Integral;
+	  return _M_replace_dispatch(__i1, __i2, __k1, __k2, _Integral());
+	}
+
+      // Specializations for the common case of pointer and iterator:
+      // useful to avoid the overhead of temporary buffering in _M_replace.
+      __versa_string&
+      replace(iterator __i1, iterator __i2, _CharT* __k1, _CharT* __k2)
+      {
+	_GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
+				 && __i2 <= _M_iend());
+	__glibcxx_requires_valid_range(__k1, __k2);
+	return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
+			     __k1, __k2 - __k1);
+      }
+
+      __versa_string&
+      replace(iterator __i1, iterator __i2,
+	      const _CharT* __k1, const _CharT* __k2)
+      {
+	_GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
+				 && __i2 <= _M_iend());
+	__glibcxx_requires_valid_range(__k1, __k2);
+	return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
+			     __k1, __k2 - __k1);
+      }
+
+      __versa_string&
+      replace(iterator __i1, iterator __i2, iterator __k1, iterator __k2)
+      {
+	_GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
+				 && __i2 <= _M_iend());
+	__glibcxx_requires_valid_range(__k1, __k2);
+	return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
+			     __k1.base(), __k2 - __k1);
+      }
+
+      __versa_string&
+      replace(iterator __i1, iterator __i2,
+	      const_iterator __k1, const_iterator __k2)
+      {
+	_GLIBCXX_DEBUG_PEDASSERT(_M_ibegin() <= __i1 && __i1 <= __i2
+				 && __i2 <= _M_iend());
+	__glibcxx_requires_valid_range(__k1, __k2);
+	return this->replace(__i1 - _M_ibegin(), __i2 - __i1,
+			     __k1.base(), __k2 - __k1);
+      }
+      
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      /**
+       *  @brief  Replace range of characters with initializer_list.
+       *  @param __i1  Iterator referencing start of range to replace.
+       *  @param __i2  Iterator referencing end of range to replace.
+       *  @param __l  The initializer_list of characters to insert.
+       *  @return  Reference to this string.
+       *  @throw  std::length_error  If new length exceeds @c max_size().
+       *
+       *  Removes the characters in the range [i1,i2).  In place,
+       *  characters in the range [k1,k2) are inserted.  If the length
+       *  of result exceeds max_size(), length_error is thrown.  The
+       *  value of the string doesn't change if an error is thrown.
+      */
+      __versa_string& replace(iterator __i1, iterator __i2,
+			      std::initializer_list<_CharT> __l)
+      { return this->replace(__i1, __i2, __l.begin(), __l.end()); }
+#endif // __GXX_EXPERIMENTAL_CXX0X__
+
+    private:
+      template<class _Integer>
+	__versa_string&
+	_M_replace_dispatch(iterator __i1, iterator __i2, _Integer __n,
+			    _Integer __val, std::__true_type)
+        { return _M_replace_aux(__i1 - _M_ibegin(), __i2 - __i1, __n, __val); }
+
+      template<class _InputIterator>
+	__versa_string&
+	_M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
+			    _InputIterator __k2, std::__false_type);
+
+      __versa_string&
+      _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
+		     _CharT __c);
+
+      __versa_string&
+      _M_replace(size_type __pos, size_type __len1, const _CharT* __s,
+		 const size_type __len2);
+
+      __versa_string&
+      _M_append(const _CharT* __s, size_type __n);
+
+    public:
+
+      /**
+       *  @brief  Copy substring into C string.
+       *  @param __s  C string to copy value into.
+       *  @param __n  Number of characters to copy.
+       *  @param __pos  Index of first character to copy.
+       *  @return  Number of characters actually copied
+       *  @throw  std::out_of_range  If pos > size().
+       *
+       *  Copies up to @a __n characters starting at @a __pos into the
+       *  C string @a s.  If @a __pos is greater than size(),
+       *  out_of_range is thrown.
+      */
+      size_type
+      copy(_CharT* __s, size_type __n, size_type __pos = 0) const;
+
+      /**
+       *  @brief  Swap contents with another string.
+       *  @param __s  String to swap with.
+       *
+       *  Exchanges the contents of this string with that of @a __s in
+       *  constant time.
+      */
+      void
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      swap(__versa_string&& __s)
+#else
+      swap(__versa_string& __s)
+#endif
+      { this->_M_swap(__s); }
+
+      // String operations:
+      /**
+       *  @brief  Return const pointer to null-terminated contents.
+       *
+       *  This is a handle to internal data.  Do not modify or dire things may
+       *  happen.
+      */
+      const _CharT*
+      c_str() const
+      { return this->_M_data(); }
+
+      /**
+       *  @brief  Return const pointer to contents.
+       *
+       *  This is a handle to internal data.  Do not modify or dire things may
+       *  happen.
+      */
+      const _CharT*
+      data() const
+      { return this->_M_data(); }
+
+      /**
+       *  @brief  Return copy of allocator used to construct this string.
+      */
+      allocator_type
+      get_allocator() const
+      { return allocator_type(this->_M_get_allocator()); }
+
+      /**
+       *  @brief  Find position of a C substring.
+       *  @param __s  C string to locate.
+       *  @param __pos  Index of character to search from.
+       *  @param __n  Number of characters from @a __s to search for.
+       *  @return  Index of start of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for the first @a
+       *  __n characters in @a __s within this string.  If found,
+       *  returns the index where it begins.  If not found, returns
+       *  npos.
+      */
+      size_type
+      find(const _CharT* __s, size_type __pos, size_type __n) const;
+
+      /**
+       *  @brief  Find position of a string.
+       *  @param __str  String to locate.
+       *  @param __pos  Index of character to search from (default 0).
+       *  @return  Index of start of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for value of @a
+       *  __str within this string.  If found, returns the index where
+       *  it begins.  If not found, returns npos.
+      */
+      size_type
+      find(const __versa_string& __str, size_type __pos = 0) const
+      { return this->find(__str.data(), __pos, __str.size()); }
+
+      /**
+       *  @brief  Find position of a C string.
+       *  @param __s  C string to locate.
+       *  @param __pos  Index of character to search from (default 0).
+       *  @return  Index of start of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for the value of @a
+       *  __s within this string.  If found, returns the index where
+       *  it begins.  If not found, returns npos.
+      */
+      size_type
+      find(const _CharT* __s, size_type __pos = 0) const
+      {
+	__glibcxx_requires_string(__s);
+	return this->find(__s, __pos, traits_type::length(__s));
+      }
+
+      /**
+       *  @brief  Find position of a character.
+       *  @param __c  Character to locate.
+       *  @param __pos  Index of character to search from (default 0).
+       *  @return  Index of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for @a __c within
+       *  this string.  If found, returns the index where it was
+       *  found.  If not found, returns npos.
+      */
+      size_type
+      find(_CharT __c, size_type __pos = 0) const;
+
+      /**
+       *  @brief  Find last position of a string.
+       *  @param __str  String to locate.
+       *  @param __pos  Index of character to search back from (default end).
+       *  @return  Index of start of last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for value of @a
+       *  __str within this string.  If found, returns the index where
+       *  it begins.  If not found, returns npos.
+      */
+      size_type
+      rfind(const __versa_string& __str, size_type __pos = npos) const
+      { return this->rfind(__str.data(), __pos, __str.size()); }
+
+      /**
+       *  @brief  Find last position of a C substring.
+       *  @param __s  C string to locate.
+       *  @param __pos  Index of character to search back from.
+       *  @param __n  Number of characters from s to search for.
+       *  @return  Index of start of last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for the first @a
+       *  __n characters in @a __s within this string.  If found,
+       *  returns the index where it begins.  If not found, returns
+       *  npos.
+      */
+      size_type
+      rfind(const _CharT* __s, size_type __pos, size_type __n) const;
+
+      /**
+       *  @brief  Find last position of a C string.
+       *  @param __s  C string to locate.
+       *  @param __pos  Index of character to start search at (default end).
+       *  @return  Index of start of  last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for the value of
+       *  @a __s within this string.  If found, returns the index
+       *  where it begins.  If not found, returns npos.
+      */
+      size_type
+      rfind(const _CharT* __s, size_type __pos = npos) const
+      {
+	__glibcxx_requires_string(__s);
+	return this->rfind(__s, __pos, traits_type::length(__s));
+      }
+
+      /**
+       *  @brief  Find last position of a character.
+       *  @param __c  Character to locate.
+       *  @param __pos  Index of character to search back from (default end).
+       *  @return  Index of last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for @a __c within
+       *  this string.  If found, returns the index where it was
+       *  found.  If not found, returns npos.
+      */
+      size_type
+      rfind(_CharT __c, size_type __pos = npos) const;
+
+      /**
+       *  @brief  Find position of a character of string.
+       *  @param __str  String containing characters to locate.
+       *  @param __pos  Index of character to search from (default 0).
+       *  @return  Index of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for one of the characters of
+       *  @a __str within this string.  If found, returns the index where it was
+       *  found.  If not found, returns npos.
+      */
+      size_type
+      find_first_of(const __versa_string& __str, size_type __pos = 0) const
+      { return this->find_first_of(__str.data(), __pos, __str.size()); }
+
+      /**
+       *  @brief  Find position of a character of C substring.
+       *  @param __s  String containing characters to locate.
+       *  @param __pos  Index of character to search from.
+       *  @param __n  Number of characters from s to search for.
+       *  @return  Index of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for one of the
+       *  first @a __n characters of @a __s within this string.  If
+       *  found, returns the index where it was found.  If not found,
+       *  returns npos.
+      */
+      size_type
+      find_first_of(const _CharT* __s, size_type __pos, size_type __n) const;
+
+      /**
+       *  @brief  Find position of a character of C string.
+       *  @param __s  String containing characters to locate.
+       *  @param __pos  Index of character to search from (default 0).
+       *  @return  Index of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for one of the
+       *  characters of @a __s within this string.  If found, returns
+       *  the index where it was found.  If not found, returns npos.
+      */
+      size_type
+      find_first_of(const _CharT* __s, size_type __pos = 0) const
+      {
+	__glibcxx_requires_string(__s);
+	return this->find_first_of(__s, __pos, traits_type::length(__s));
+      }
+
+      /**
+       *  @brief  Find position of a character.
+       *  @param __c  Character to locate.
+       *  @param __pos  Index of character to search from (default 0).
+       *  @return  Index of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for the character
+       *  @a __c within this string.  If found, returns the index
+       *  where it was found.  If not found, returns npos.
+       *
+       *  Note: equivalent to find(c, pos).
+      */
+      size_type
+      find_first_of(_CharT __c, size_type __pos = 0) const
+      { return this->find(__c, __pos); }
+
+      /**
+       *  @brief  Find last position of a character of string.
+       *  @param __str  String containing characters to locate.
+       *  @param __pos  Index of character to search back from (default end).
+       *  @return  Index of last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for one of the
+       *  characters of @a __str within this string.  If found,
+       *  returns the index where it was found.  If not found, returns
+       *  npos.
+      */
+      size_type
+      find_last_of(const __versa_string& __str, size_type __pos = npos) const
+      { return this->find_last_of(__str.data(), __pos, __str.size()); }
+
+      /**
+       *  @brief  Find last position of a character of C substring.
+       *  @param __s  C string containing characters to locate.
+       *  @param __pos  Index of character to search back from.
+       *  @param __n  Number of characters from s to search for.
+       *  @return  Index of last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for one of the
+       *  first @a __n characters of @a __s within this string.  If
+       *  found, returns the index where it was found.  If not found,
+       *  returns npos.
+      */
+      size_type
+      find_last_of(const _CharT* __s, size_type __pos, size_type __n) const;
+
+      /**
+       *  @brief  Find last position of a character of C string.
+       *  @param __s  C string containing characters to locate.
+       *  @param __pos  Index of character to search back from (default end).
+       *  @return  Index of last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for one of the
+       *  characters of @a __s within this string.  If found, returns
+       *  the index where it was found.  If not found, returns npos.
+      */
+      size_type
+      find_last_of(const _CharT* __s, size_type __pos = npos) const
+      {
+	__glibcxx_requires_string(__s);
+	return this->find_last_of(__s, __pos, traits_type::length(__s));
+      }
+
+      /**
+       *  @brief  Find last position of a character.
+       *  @param __c  Character to locate.
+       *  @param __pos  Index of character to search back from (default end).
+       *  @return  Index of last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for @a __c within
+       *  this string.  If found, returns the index where it was
+       *  found.  If not found, returns npos.
+       *
+       *  Note: equivalent to rfind(c, pos).
+      */
+      size_type
+      find_last_of(_CharT __c, size_type __pos = npos) const
+      { return this->rfind(__c, __pos); }
+
+      /**
+       *  @brief  Find position of a character not in string.
+       *  @param __str  String containing characters to avoid.
+       *  @param __pos  Index of character to search from (default 0).
+       *  @return  Index of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for a character not
+       *  contained in @a __str within this string.  If found, returns
+       *  the index where it was found.  If not found, returns npos.
+      */
+      size_type
+      find_first_not_of(const __versa_string& __str, size_type __pos = 0) const
+      { return this->find_first_not_of(__str.data(), __pos, __str.size()); }
+
+      /**
+       *  @brief  Find position of a character not in C substring.
+       *  @param __s  C string containing characters to avoid.
+       *  @param __pos  Index of character to search from.
+       *  @param __n  Number of characters from s to consider.
+       *  @return  Index of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for a character not
+       *  contained in the first @a __n characters of @a __s within
+       *  this string.  If found, returns the index where it was
+       *  found.  If not found, returns npos.
+      */
+      size_type
+      find_first_not_of(const _CharT* __s, size_type __pos,
+			size_type __n) const;
+
+      /**
+       *  @brief  Find position of a character not in C string.
+       *  @param __s  C string containing characters to avoid.
+       *  @param __pos  Index of character to search from (default 0).
+       *  @return  Index of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for a character not
+       *  contained in @a __s within this string.  If found, returns
+       *  the index where it was found.  If not found, returns npos.
+      */
+      size_type
+      find_first_not_of(const _CharT* __s, size_type __pos = 0) const
+      {
+	__glibcxx_requires_string(__s);
+	return this->find_first_not_of(__s, __pos, traits_type::length(__s));
+      }
+
+      /**
+       *  @brief  Find position of a different character.
+       *  @param __c  Character to avoid.
+       *  @param __pos  Index of character to search from (default 0).
+       *  @return  Index of first occurrence.
+       *
+       *  Starting from @a __pos, searches forward for a character
+       *  other than @a __c within this string.  If found, returns the
+       *  index where it was found.  If not found, returns npos.
+      */
+      size_type
+      find_first_not_of(_CharT __c, size_type __pos = 0) const;
+
+      /**
+       *  @brief  Find last position of a character not in string.
+       *  @param __str  String containing characters to avoid.
+       *  @param __pos  Index of character to search back from (default end).
+       *  @return  Index of last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for a character
+       *  not contained in @a __str within this string.  If found,
+       *  returns the index where it was found.  If not found, returns
+       *  npos.
+      */
+      size_type
+      find_last_not_of(const __versa_string& __str,
+		       size_type __pos = npos) const
+      { return this->find_last_not_of(__str.data(), __pos, __str.size()); }
+
+      /**
+       *  @brief  Find last position of a character not in C substring.
+       *  @param __s  C string containing characters to avoid.
+       *  @param __pos  Index of character to search back from.
+       *  @param __n  Number of characters from s to consider.
+       *  @return  Index of last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for a character
+       *  not contained in the first @a __n characters of @a __s
+       *  within this string.  If found, returns the index where it
+       *  was found.  If not found, returns npos.
+      */
+      size_type
+      find_last_not_of(const _CharT* __s, size_type __pos,
+		       size_type __n) const;
+      /**
+       *  @brief  Find last position of a character not in C string.
+       *  @param __s  C string containing characters to avoid.
+       *  @param __pos  Index of character to search back from (default end).
+       *  @return  Index of last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for a character
+       *  not contained in @a __s within this string.  If found,
+       *  returns the index where it was found.  If not found, returns
+       *  npos.
+      */
+      size_type
+      find_last_not_of(const _CharT* __s, size_type __pos = npos) const
+      {
+	__glibcxx_requires_string(__s);
+	return this->find_last_not_of(__s, __pos, traits_type::length(__s));
+      }
+
+      /**
+       *  @brief  Find last position of a different character.
+       *  @param __c  Character to avoid.
+       *  @param __pos  Index of character to search back from (default end).
+       *  @return  Index of last occurrence.
+       *
+       *  Starting from @a __pos, searches backward for a character
+       *  other than @a __c within this string.  If found, returns the
+       *  index where it was found.  If not found, returns npos.
+      */
+      size_type
+      find_last_not_of(_CharT __c, size_type __pos = npos) const;
+
+      /**
+       *  @brief  Get a substring.
+       *  @param __pos  Index of first character (default 0).
+       *  @param __n  Number of characters in substring (default remainder).
+       *  @return  The new string.
+       *  @throw  std::out_of_range  If pos > size().
+       *
+       *  Construct and return a new string using the @a __n
+       *  characters starting at @a __pos.  If the string is too
+       *  short, use the remainder of the characters.  If @a __pos is
+       *  beyond the end of the string, out_of_range is thrown.
+      */
+      __versa_string
+      substr(size_type __pos = 0, size_type __n = npos) const
+      {
+	return __versa_string(*this, _M_check(__pos, "__versa_string::substr"),
+			      __n);
+      }
+
+      /**
+       *  @brief  Compare to a string.
+       *  @param __str  String to compare against.
+       *  @return  Integer < 0, 0, or > 0.
+       *
+       *  Returns an integer < 0 if this string is ordered before @a
+       *  __str, 0 if their values are equivalent, or > 0 if this
+       *  string is ordered after @a __str.  Determines the effective
+       *  length rlen of the strings to compare as the smallest of
+       *  size() and str.size().  The function then compares the two
+       *  strings by calling traits::compare(data(), str.data(),rlen).
+       *  If the result of the comparison is nonzero returns it,
+       *  otherwise the shorter one is ordered first.
+      */
+      int
+      compare(const __versa_string& __str) const
+      {
+	if (this->_M_compare(__str))
+	  return 0;
+
+	const size_type __size = this->size();
+	const size_type __osize = __str.size();
+	const size_type __len = std::min(__size, __osize);
+
+	int __r = traits_type::compare(this->_M_data(), __str.data(), __len);
+	if (!__r)
+	  __r = _S_compare(__size, __osize);
+	return __r;
+      }
+
+      /**
+       *  @brief  Compare substring to a string.
+       *  @param __pos  Index of first character of substring.
+       *  @param __n  Number of characters in substring.
+       *  @param __str  String to compare against.
+       *  @return  Integer < 0, 0, or > 0.
+       *
+       *  Form the substring of this string from the @a __n characters
+       *  starting at @a __pos.  Returns an integer < 0 if the
+       *  substring is ordered before @a __str, 0 if their values are
+       *  equivalent, or > 0 if the substring is ordered after @a
+       *  __str.  Determines the effective length rlen of the strings
+       *  to compare as the smallest of the length of the substring
+       *  and @a __str.size().  The function then compares the two
+       *  strings by calling
+       *  traits::compare(substring.data(),str.data(),rlen).  If the
+       *  result of the comparison is nonzero returns it, otherwise
+       *  the shorter one is ordered first.
+      */
+      int
+      compare(size_type __pos, size_type __n,
+	      const __versa_string& __str) const;
+
+      /**
+       *  @brief  Compare substring to a substring.
+       *  @param __pos1  Index of first character of substring.
+       *  @param __n1  Number of characters in substring.
+       *  @param __str  String to compare against.
+       *  @param __pos2  Index of first character of substring of str.
+       *  @param __n2  Number of characters in substring of str.
+       *  @return  Integer < 0, 0, or > 0.
+       *
+       *  Form the substring of this string from the @a __n1
+       *  characters starting at @a __pos1.  Form the substring of @a
+       *  __str from the @a __n2 characters starting at @a __pos2.
+       *  Returns an integer < 0 if this substring is ordered before
+       *  the substring of @a __str, 0 if their values are equivalent,
+       *  or > 0 if this substring is ordered after the substring of
+       *  @a __str.  Determines the effective length rlen of the
+       *  strings to compare as the smallest of the lengths of the
+       *  substrings.  The function then compares the two strings by
+       *  calling
+       *  traits::compare(substring.data(),str.substr(pos2,n2).data(),rlen).
+       *  If the result of the comparison is nonzero returns it,
+       *  otherwise the shorter one is ordered first.
+      */
+      int
+      compare(size_type __pos1, size_type __n1, const __versa_string& __str,
+	      size_type __pos2, size_type __n2) const;
+
+      /**
+       *  @brief  Compare to a C string.
+       *  @param __s  C string to compare against.
+       *  @return  Integer < 0, 0, or > 0.
+       *
+       *  Returns an integer < 0 if this string is ordered before @a
+       *  __s, 0 if their values are equivalent, or > 0 if this string
+       *  is ordered after @a __s.  Determines the effective length
+       *  rlen of the strings to compare as the smallest of size() and
+       *  the length of a string constructed from @a __s.  The
+       *  function then compares the two strings by calling
+       *  traits::compare(data(),s,rlen).  If the result of the
+       *  comparison is nonzero returns it, otherwise the shorter one
+       *  is ordered first.
+      */
+      int
+      compare(const _CharT* __s) const;
+
+      // _GLIBCXX_RESOLVE_LIB_DEFECTS
+      // 5 String::compare specification questionable
+      /**
+       *  @brief  Compare substring to a C string.
+       *  @param __pos  Index of first character of substring.
+       *  @param __n1  Number of characters in substring.
+       *  @param __s  C string to compare against.
+       *  @return  Integer < 0, 0, or > 0.
+       *
+       *  Form the substring of this string from the @a __n1
+       *  characters starting at @a __pos.  Returns an integer < 0 if
+       *  the substring is ordered before @a __s, 0 if their values
+       *  are equivalent, or > 0 if the substring is ordered after @a
+       *  __s.  Determines the effective length rlen of the strings to
+       *  compare as the smallest of the length of the substring and
+       *  the length of a string constructed from @a __s.  The
+       *  function then compares the two string by calling
+       *  traits::compare(substring.data(),s,rlen).  If the result of
+       *  the comparison is nonzero returns it, otherwise the shorter
+       *  one is ordered first.
+      */
+      int
+      compare(size_type __pos, size_type __n1, const _CharT* __s) const;
+
+      /**
+       *  @brief  Compare substring against a character array.
+       *  @param __pos1  Index of first character of substring.
+       *  @param __n1  Number of characters in substring.
+       *  @param __s  character array to compare against.
+       *  @param __n2  Number of characters of s.
+       *  @return  Integer < 0, 0, or > 0.
+       *
+       *  Form the substring of this string from the @a __n1
+       *  characters starting at @a __pos1.  Form a string from the
+       *  first @a __n2 characters of @a __s.  Returns an integer < 0
+       *  if this substring is ordered before the string from @a __s,
+       *  0 if their values are equivalent, or > 0 if this substring
+       *  is ordered after the string from @a __s.  Determines the
+       *  effective length rlen of the strings to compare as the
+       *  smallest of the length of the substring and @a __n2.  The
+       *  function then compares the two strings by calling
+       *  traits::compare(substring.data(),s,rlen).  If the result of
+       *  the comparison is nonzero returns it, otherwise the shorter
+       *  one is ordered first.
+       *
+       *  NB: s must have at least n2 characters, '\\0' has no special
+       *  meaning.
+      */
+      int
+      compare(size_type __pos, size_type __n1, const _CharT* __s,
+	      size_type __n2) const;
+    };
+
+  // operator+
+  /**
+   *  @brief  Concatenate two strings.
+   *  @param __lhs  First string.
+   *  @param __rhs  Last string.
+   *  @return  New string with value of @a __lhs followed by @a __rhs.
+   */
+  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);
+
+  /**
+   *  @brief  Concatenate C string and string.
+   *  @param __lhs  First string.
+   *  @param __rhs  Last string.
+   *  @return  New string with value of @a __lhs followed by @a __rhs.
+   */
+  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);
+
+  /**
+   *  @brief  Concatenate character and string.
+   *  @param __lhs  First string.
+   *  @param __rhs  Last string.
+   *  @return  New string with @a __lhs followed by @a __rhs.
+   */
+  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);
+
+  /**
+   *  @brief  Concatenate string and C string.
+   *  @param __lhs  First string.
+   *  @param __rhs  Last string.
+   *  @return  New string with @a __lhs followed by @a __rhs.
+   */
+  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);
+
+  /**
+   *  @brief  Concatenate string and character.
+   *  @param __lhs  First string.
+   *  @param __rhs  Last string.
+   *  @return  New string with @a __lhs followed by @a __rhs.
+   */
+  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);
+
+  // operator ==
+  /**
+   *  @brief  Test equivalence of two strings.
+   *  @param __lhs  First string.
+   *  @param __rhs  Second string.
+   *  @return  True if @a __lhs.compare(@a __rhs) == 0.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator==(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	       const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return __lhs.compare(__rhs) == 0; }
+
+  template<typename _CharT,
+	   template <typename, typename, typename> class _Base>
+    inline typename __enable_if<std::__is_char<_CharT>::__value, bool>::__type
+    operator==(const __versa_string<_CharT, std::char_traits<_CharT>,
+	       std::allocator<_CharT>, _Base>& __lhs,
+	       const __versa_string<_CharT, std::char_traits<_CharT>,
+	       std::allocator<_CharT>, _Base>& __rhs)
+    { return (__lhs.size() == __rhs.size()
+	      && !std::char_traits<_CharT>::compare(__lhs.data(), __rhs.data(),
+						    __lhs.size())); }
+
+  /**
+   *  @brief  Test equivalence of C string and string.
+   *  @param __lhs  C string.
+   *  @param __rhs  String.
+   *  @return  True if @a __rhs.compare(@a __lhs) == 0.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator==(const _CharT* __lhs,
+	       const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return __rhs.compare(__lhs) == 0; }
+
+  /**
+   *  @brief  Test equivalence of string and C string.
+   *  @param __lhs  String.
+   *  @param __rhs  C string.
+   *  @return  True if @a __lhs.compare(@a __rhs) == 0.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator==(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	       const _CharT* __rhs)
+    { return __lhs.compare(__rhs) == 0; }
+
+  // operator !=
+  /**
+   *  @brief  Test difference of two strings.
+   *  @param __lhs  First string.
+   *  @param __rhs  Second string.
+   *  @return  True if @a __lhs.compare(@a __rhs) != 0.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator!=(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	       const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return !(__lhs == __rhs); }
+
+  /**
+   *  @brief  Test difference of C string and string.
+   *  @param __lhs  C string.
+   *  @param __rhs  String.
+   *  @return  True if @a __rhs.compare(@a __lhs) != 0.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator!=(const _CharT* __lhs,
+	       const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return !(__lhs == __rhs); }
+
+  /**
+   *  @brief  Test difference of string and C string.
+   *  @param __lhs  String.
+   *  @param __rhs  C string.
+   *  @return  True if @a __lhs.compare(@a __rhs) != 0.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator!=(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	       const _CharT* __rhs)
+    { return !(__lhs == __rhs); }
+
+  // operator <
+  /**
+   *  @brief  Test if string precedes string.
+   *  @param __lhs  First string.
+   *  @param __rhs  Second string.
+   *  @return  True if @a __lhs precedes @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator<(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	      const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return __lhs.compare(__rhs) < 0; }
+
+  /**
+   *  @brief  Test if string precedes C string.
+   *  @param __lhs  String.
+   *  @param __rhs  C string.
+   *  @return  True if @a __lhs precedes @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator<(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	      const _CharT* __rhs)
+    { return __lhs.compare(__rhs) < 0; }
+
+  /**
+   *  @brief  Test if C string precedes string.
+   *  @param __lhs  C string.
+   *  @param __rhs  String.
+   *  @return  True if @a __lhs precedes @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator<(const _CharT* __lhs,
+	      const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return __rhs.compare(__lhs) > 0; }
+
+  // operator >
+  /**
+   *  @brief  Test if string follows string.
+   *  @param __lhs  First string.
+   *  @param __rhs  Second string.
+   *  @return  True if @a __lhs follows @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator>(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	      const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return __lhs.compare(__rhs) > 0; }
+
+  /**
+   *  @brief  Test if string follows C string.
+   *  @param __lhs  String.
+   *  @param __rhs  C string.
+   *  @return  True if @a __lhs follows @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator>(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	      const _CharT* __rhs)
+    { return __lhs.compare(__rhs) > 0; }
+
+  /**
+   *  @brief  Test if C string follows string.
+   *  @param __lhs  C string.
+   *  @param __rhs  String.
+   *  @return  True if @a __lhs follows @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator>(const _CharT* __lhs,
+	      const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return __rhs.compare(__lhs) < 0; }
+
+  // operator <=
+  /**
+   *  @brief  Test if string doesn't follow string.
+   *  @param __lhs  First string.
+   *  @param __rhs  Second string.
+   *  @return  True if @a __lhs doesn't follow @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator<=(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	       const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return __lhs.compare(__rhs) <= 0; }
+
+  /**
+   *  @brief  Test if string doesn't follow C string.
+   *  @param __lhs  String.
+   *  @param __rhs  C string.
+   *  @return  True if @a __lhs doesn't follow @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator<=(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	       const _CharT* __rhs)
+    { return __lhs.compare(__rhs) <= 0; }
+
+  /**
+   *  @brief  Test if C string doesn't follow string.
+   *  @param __lhs  C string.
+   *  @param __rhs  String.
+   *  @return  True if @a __lhs doesn't follow @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator<=(const _CharT* __lhs,
+	       const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return __rhs.compare(__lhs) >= 0; }
+
+  // operator >=
+  /**
+   *  @brief  Test if string doesn't precede string.
+   *  @param __lhs  First string.
+   *  @param __rhs  Second string.
+   *  @return  True if @a __lhs doesn't precede @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator>=(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	       const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return __lhs.compare(__rhs) >= 0; }
+
+  /**
+   *  @brief  Test if string doesn't precede C string.
+   *  @param __lhs  String.
+   *  @param __rhs  C string.
+   *  @return  True if @a __lhs doesn't precede @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator>=(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	       const _CharT* __rhs)
+    { return __lhs.compare(__rhs) >= 0; }
+
+  /**
+   *  @brief  Test if C string doesn't precede string.
+   *  @param __lhs  C string.
+   *  @param __rhs  String.
+   *  @return  True if @a __lhs doesn't precede @a __rhs.  False otherwise.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline bool
+    operator>=(const _CharT* __lhs,
+	       const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { return __rhs.compare(__lhs) <= 0; }
+
+  /**
+   *  @brief  Swap contents of two strings.
+   *  @param __lhs  First string.
+   *  @param __rhs  Second string.
+   *
+   *  Exchanges the contents of @a __lhs and @a __rhs in constant time.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline void
+    swap(__versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	 __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { __lhs.swap(__rhs); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline void
+    swap(__versa_string<_CharT, _Traits, _Alloc, _Base>&& __lhs,
+	 __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
+    { __lhs.swap(__rhs); }
+
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline void
+    swap(__versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
+	 __versa_string<_CharT, _Traits, _Alloc, _Base>&& __rhs)
+    { __lhs.swap(__rhs); }
+#endif
+
+_GLIBCXX_END_NAMESPACE
+
+_GLIBCXX_BEGIN_NAMESPACE(std)
+
+  /**
+   *  @brief  Read stream into a string.
+   *  @param __is  Input stream.
+   *  @param __str  Buffer to store into.
+   *  @return  Reference to the input stream.
+   *
+   *  Stores characters from @a __is into @a __str until whitespace is
+   *  found, the end of the stream is encountered, or str.max_size()
+   *  is reached.  If is.width() is non-zero, that is the limit on the
+   *  number of characters stored into @a __str.  Any previous
+   *  contents of @a __str are erased.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+           template <typename, typename, typename> class _Base>
+    basic_istream<_CharT, _Traits>&
+    operator>>(basic_istream<_CharT, _Traits>& __is,
+	       __gnu_cxx::__versa_string<_CharT, _Traits,
+	                                 _Alloc, _Base>& __str);
+
+  /**
+   *  @brief  Write string to a stream.
+   *  @param __os  Output stream.
+   *  @param __str  String to write out.
+   *  @return  Reference to the output stream.
+   *
+   *  Output characters of @a __str into os following the same rules as for
+   *  writing a C string.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+	   template <typename, typename, typename> class _Base>
+    inline basic_ostream<_CharT, _Traits>&
+    operator<<(basic_ostream<_CharT, _Traits>& __os,
+	       const __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc,
+	       _Base>& __str)
+    {
+      // _GLIBCXX_RESOLVE_LIB_DEFECTS
+      // 586. string inserter not a formatted function
+      return __ostream_insert(__os, __str.data(), __str.size());
+    }
+
+  /**
+   *  @brief  Read a line from stream into a string.
+   *  @param __is  Input stream.
+   *  @param __str  Buffer to store into.
+   *  @param __delim  Character marking end of line.
+   *  @return  Reference to the input stream.
+   *
+   *  Stores characters from @a __is into @a __str until @a __delim is
+   *  found, the end of the stream is encountered, or str.max_size()
+   *  is reached.  If is.width() is non-zero, that is the limit on the
+   *  number of characters stored into @a __str.  Any previous
+   *  contents of @a __str are erased.  If @a delim was encountered,
+   *  it is extracted but not stored into @a __str.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+           template <typename, typename, typename> class _Base>
+    basic_istream<_CharT, _Traits>&
+    getline(basic_istream<_CharT, _Traits>& __is,
+	    __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>& __str,
+	    _CharT __delim);
+
+  /**
+   *  @brief  Read a line from stream into a string.
+   *  @param __is  Input stream.
+   *  @param __str  Buffer to store into.
+   *  @return  Reference to the input stream.
+   *
+   *  Stores characters from is into @a __str until '\n' is found, the
+   *  end of the stream is encountered, or str.max_size() is reached.
+   *  If is.width() is non-zero, that is the limit on the number of
+   *  characters stored into @a __str.  Any previous contents of @a
+   *  __str are erased.  If end of line was encountered, it is
+   *  extracted but not stored into @a __str.
+   */
+  template<typename _CharT, typename _Traits, typename _Alloc,
+           template <typename, typename, typename> class _Base>
+    inline basic_istream<_CharT, _Traits>&
+    getline(basic_istream<_CharT, _Traits>& __is,
+	    __gnu_cxx::__versa_string<_CharT, _Traits, _Alloc, _Base>& __str)
+    { return getline(__is, __str, __is.widen('\n')); }      
+
+_GLIBCXX_END_NAMESPACE
+
+#if (defined(__GXX_EXPERIMENTAL_CXX0X__) && defined(_GLIBCXX_USE_C99))
+
+#include <ext/string_conversions.h>
+
+_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
+
+  // 21.4 Numeric Conversions [string.conversions].
+  inline int
+  stoi(const __vstring& __str, std::size_t* __idx = 0, int __base = 10)
+  { return __gnu_cxx::__stoa<long, int>(&std::strtol, "stoi", __str.c_str(),
+					__idx, __base); }
+
+  inline long
+  stol(const __vstring& __str, std::size_t* __idx = 0, int __base = 10)
+  { return __gnu_cxx::__stoa(&std::strtol, "stol", __str.c_str(),
+			     __idx, __base); }
+
+  inline unsigned long
+  stoul(const __vstring& __str, std::size_t* __idx = 0, int __base = 10)
+  { return __gnu_cxx::__stoa(&std::strtoul, "stoul", __str.c_str(),
+			     __idx, __base); }
+
+  inline long long
+  stoll(const __vstring& __str, std::size_t* __idx = 0,	int __base = 10)
+  { return __gnu_cxx::__stoa(&std::strtoll, "stoll", __str.c_str(),
+			     __idx, __base); }
+
+  inline unsigned long long
+  stoull(const __vstring& __str, std::size_t* __idx, int __base = 10)
+  { return __gnu_cxx::__stoa(&std::strtoull, "stoull", __str.c_str(),
+			     __idx, __base); }
+
+  // NB: strtof vs strtod.
+  inline float
+  stof(const __vstring& __str, std::size_t* __idx = 0)
+  { return __gnu_cxx::__stoa(&std::strtof, "stof", __str.c_str(), __idx); }
+
+  inline double
+  stod(const __vstring& __str, std::size_t* __idx = 0)
+  { return __gnu_cxx::__stoa(&std::strtod, "stod", __str.c_str(), __idx); }
+
+  inline long double
+  stold(const __vstring& __str, std::size_t* __idx = 0)
+  { return __gnu_cxx::__stoa(&std::strtold, "stold", __str.c_str(), __idx); }
+
+  // NB: (v)snprintf vs sprintf.
+  inline __vstring
+  to_string(long long __val)
+  { return __gnu_cxx::__to_xstring<__vstring>(&std::vsnprintf,
+					      4 * sizeof(long long),
+					      "%lld", __val); }
+
+  inline __vstring
+  to_string(unsigned long long __val)
+  { return __gnu_cxx::__to_xstring<__vstring>(&std::vsnprintf,
+					      4 * sizeof(unsigned long long),
+					      "%llu", __val); }
+
+  inline __vstring
+  to_string(long double __val)
+  {
+    const int __n = __numeric_traits<long double>::__max_exponent10 + 20;
+    return __gnu_cxx::__to_xstring<__vstring>(&std::vsnprintf, __n,
+					      "%Lf", __val);
+  }
+
+#ifdef _GLIBCXX_USE_WCHAR_T
+  inline int 
+  stoi(const __wvstring& __str, std::size_t* __idx = 0, int __base = 10)
+  { return __gnu_cxx::__stoa<long, int>(&std::wcstol, "stoi", __str.c_str(),
+					__idx, __base); }
+
+  inline long 
+  stol(const __wvstring& __str, std::size_t* __idx = 0, int __base = 10)
+  { return __gnu_cxx::__stoa(&std::wcstol, "stol", __str.c_str(),
+			     __idx, __base); }
+
+  inline unsigned long
+  stoul(const __wvstring& __str, std::size_t* __idx = 0, int __base = 10)
+  { return __gnu_cxx::__stoa(&std::wcstoul, "stoul", __str.c_str(),
+			     __idx, __base); }
+
+  inline long long
+  stoll(const __wvstring& __str, std::size_t* __idx = 0, int __base = 10)
+  { return __gnu_cxx::__stoa(&std::wcstoll, "stoll", __str.c_str(),
+			     __idx, __base); }
+
+  inline unsigned long long
+  stoull(const __wvstring& __str, std::size_t* __idx = 0, int __base = 10)
+  { return __gnu_cxx::__stoa(&std::wcstoull, "stoull", __str.c_str(),
+			     __idx, __base); }
+
+  // NB: wcstof vs wcstod.
+  inline float
+  stof(const __wvstring& __str, std::size_t* __idx = 0)
+  { return __gnu_cxx::__stoa(&std::wcstof, "stof", __str.c_str(), __idx); }
+
+  inline double
+  stod(const __wvstring& __str, std::size_t* __idx = 0)
+  { return __gnu_cxx::__stoa(&std::wcstod, "stod", __str.c_str(), __idx); }
+
+  inline long double
+  stold(const __wvstring& __str, std::size_t* __idx = 0)
+  { return __gnu_cxx::__stoa(&std::wcstold, "stold", __str.c_str(), __idx); }
+
+  inline __wvstring
+  to_wstring(long long __val)
+  { return __gnu_cxx::__to_xstring<__wvstring>(&std::vswprintf,
+					       4 * sizeof(long long),
+					       L"%lld", __val); }
+
+  inline __wvstring
+  to_wstring(unsigned long long __val)
+  { return __gnu_cxx::__to_xstring<__wvstring>(&std::vswprintf,
+					       4 * sizeof(unsigned long long),
+					       L"%llu", __val); }
+
+  inline __wvstring
+  to_wstring(long double __val)
+  {
+    const int __n = __numeric_traits<long double>::__max_exponent10 + 20;
+    return __gnu_cxx::__to_xstring<__wvstring>(&std::vswprintf, __n,
+					       L"%Lf", __val);
+  }
+#endif
+
+_GLIBCXX_END_NAMESPACE
+
+#endif
+
+#ifndef _GLIBCXX_EXPORT_TEMPLATE
+# include "vstring.tcc" 
+#endif
+
+#if __google_stl_debug_string && !defined(_GLIBCXX_DEBUG)
+// Undo our defines, so they don't affect anything else.
+# undef _GLIBCXX_DEBUG_ASSERT
+# undef _GLIBCXX_DEBUG_PEDASSERT
+# define _GLIBCXX_DEBUG_ASSERT(_Condition)
+# define _GLIBCXX_DEBUG_PEDASSERT(_Condition)
+#endif
+
+#endif /* _VSTRING_H */