stl_uninitialized.h File Reference

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Functions
namespace std	_GLIBCXX_VISIBILITY (default)

Detailed Description

This is an internal header file, included by other library headers. Do not attempt to use it directly. {memory}

Function Documentation

namespace std _GLIBCXX_VISIBILITY

(

default

)

Copies the range [first,last) into result.

Parameters

__first	An input iterator.
__last	An input iterator.
__result	An output iterator.

Returns

__result + (__first - __last)

Like copy(), but does not require an initialized output range.

Copies the value x into the range [first,last).

Parameters

__first	An input iterator.
__last	An input iterator.
__x	The source value.

Returns

Nothing.

Like fill(), but does not require an initialized output range.

Copies the value x into the range [first,first+n).

Parameters

__first	An input iterator.
__n	The number of copies to make.
__x	The source value.

Returns

Nothing.

Like fill_n(), but does not require an initialized output range.

{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  template<bool _TrivialValueTypes>
    struct __uninitialized_copy
    {
      template<typename _InputIterator, typename _ForwardIterator>
        static _ForwardIterator
        __uninit_copy(_InputIterator __first, _InputIterator __last,
              _ForwardIterator __result)
        {
      _ForwardIterator __cur = __result;
      __try
        {
          for (; __first != __last; ++__first, ++__cur)
        std::_Construct(std::__addressof(*__cur), *__first);
          return __cur;
        }
      __catch(...)
        {
          std::_Destroy(__result, __cur);
          __throw_exception_again;
        }
    }
    };

  template<>
    struct __uninitialized_copy<true>
    {
      template<typename _InputIterator, typename _ForwardIterator>
        static _ForwardIterator
        __uninit_copy(_InputIterator __first, _InputIterator __last,
              _ForwardIterator __result)
        { return std::copy(__first, __last, __result); }
    };

  template<typename _InputIterator, typename _ForwardIterator>
    inline _ForwardIterator
    uninitialized_copy(_InputIterator __first, _InputIterator __last,
               _ForwardIterator __result)
    {
      typedef typename iterator_traits<_InputIterator>::value_type
    _ValueType1;
      typedef typename iterator_traits<_ForwardIterator>::value_type
    _ValueType2;

      return std::__uninitialized_copy<(__is_trivial(_ValueType1)
                    && __is_trivial(_ValueType2))>::
    __uninit_copy(__first, __last, __result);
    }


  template<bool _TrivialValueType>
    struct __uninitialized_fill
    {
      template<typename _ForwardIterator, typename _Tp>
        static void
        __uninit_fill(_ForwardIterator __first, _ForwardIterator __last,
              const _Tp& __x)
        {
      _ForwardIterator __cur = __first;
      __try
        {
          for (; __cur != __last; ++__cur)
        std::_Construct(std::__addressof(*__cur), __x);
        }
      __catch(...)
        {
          std::_Destroy(__first, __cur);
          __throw_exception_again;
        }
    }
    };

  template<>
    struct __uninitialized_fill<true>
    {
      template<typename _ForwardIterator, typename _Tp>
        static void
        __uninit_fill(_ForwardIterator __first, _ForwardIterator __last,
              const _Tp& __x)
        { std::fill(__first, __last, __x); }
    };

  template<typename _ForwardIterator, typename _Tp>
    inline void
    uninitialized_fill(_ForwardIterator __first, _ForwardIterator __last,
               const _Tp& __x)
    {
      typedef typename iterator_traits<_ForwardIterator>::value_type
    _ValueType;

      std::__uninitialized_fill<__is_trivial(_ValueType)>::
    __uninit_fill(__first, __last, __x);
    }


  template<bool _TrivialValueType>
    struct __uninitialized_fill_n
    {
      template<typename _ForwardIterator, typename _Size, typename _Tp>
        static void
        __uninit_fill_n(_ForwardIterator __first, _Size __n,
            const _Tp& __x)
        {
      _ForwardIterator __cur = __first;
      __try
        {
          for (; __n > 0; --__n, ++__cur)
        std::_Construct(std::__addressof(*__cur), __x);
        }
      __catch(...)
        {
          std::_Destroy(__first, __cur);
          __throw_exception_again;
        }
    }
    };

  template<>
    struct __uninitialized_fill_n<true>
    {
      template<typename _ForwardIterator, typename _Size, typename _Tp>
        static void
        __uninit_fill_n(_ForwardIterator __first, _Size __n,
            const _Tp& __x)
        { std::fill_n(__first, __n, __x); }
    };

  template<typename _ForwardIterator, typename _Size, typename _Tp>
    inline void
    uninitialized_fill_n(_ForwardIterator __first, _Size __n, const _Tp& __x)
    {
      typedef typename iterator_traits<_ForwardIterator>::value_type
    _ValueType;

      std::__uninitialized_fill_n<__is_trivial(_ValueType)>::
    __uninit_fill_n(__first, __n, __x);
    }

  // Extensions: versions of uninitialized_copy, uninitialized_fill,
  //  and uninitialized_fill_n that take an allocator parameter.
  //  We dispatch back to the standard versions when we're given the
  //  default allocator.  For nondefault allocators we do not use 
  //  any of the POD optimizations.

  template<typename _InputIterator, typename _ForwardIterator,
       typename _Allocator>
    _ForwardIterator
    __uninitialized_copy_a(_InputIterator __first, _InputIterator __last,
               _ForwardIterator __result, _Allocator& __alloc)
    {
      _ForwardIterator __cur = __result;
      __try
    {
      typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
      for (; __first != __last; ++__first, ++__cur)
        __traits::construct(__alloc, std::__addressof(*__cur), *__first);
      return __cur;
    }
      __catch(...)
    {
      std::_Destroy(__result, __cur, __alloc);
      __throw_exception_again;
    }
    }

  template<typename _InputIterator, typename _ForwardIterator, typename _Tp>
    inline _ForwardIterator
    __uninitialized_copy_a(_InputIterator __first, _InputIterator __last,
               _ForwardIterator __result, allocator<_Tp>&)
    { return std::uninitialized_copy(__first, __last, __result); }

  template<typename _InputIterator, typename _ForwardIterator,
       typename _Allocator>
    inline _ForwardIterator
    __uninitialized_move_a(_InputIterator __first, _InputIterator __last,
               _ForwardIterator __result, _Allocator& __alloc)
    {
      return std::__uninitialized_copy_a(_GLIBCXX_MAKE_MOVE_ITERATOR(__first),
                     _GLIBCXX_MAKE_MOVE_ITERATOR(__last),
                     __result, __alloc);
    }

  template<typename _InputIterator, typename _ForwardIterator,
       typename _Allocator>
    inline _ForwardIterator
    __uninitialized_move_if_noexcept_a(_InputIterator __first,
                       _InputIterator __last,
                       _ForwardIterator __result,
                       _Allocator& __alloc)
    {
      return std::__uninitialized_copy_a
    (_GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(__first),
     _GLIBCXX_MAKE_MOVE_IF_NOEXCEPT_ITERATOR(__last), __result, __alloc);
    }

  template<typename _ForwardIterator, typename _Tp, typename _Allocator>
    void
    __uninitialized_fill_a(_ForwardIterator __first, _ForwardIterator __last,
               const _Tp& __x, _Allocator& __alloc)
    {
      _ForwardIterator __cur = __first;
      __try
    {
      typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
      for (; __cur != __last; ++__cur)
        __traits::construct(__alloc, std::__addressof(*__cur), __x);
    }
      __catch(...)
    {
      std::_Destroy(__first, __cur, __alloc);
      __throw_exception_again;
    }
    }

  template<typename _ForwardIterator, typename _Tp, typename _Tp2>
    inline void
    __uninitialized_fill_a(_ForwardIterator __first, _ForwardIterator __last,
               const _Tp& __x, allocator<_Tp2>&)
    { std::uninitialized_fill(__first, __last, __x); }

  template<typename _ForwardIterator, typename _Size, typename _Tp,
       typename _Allocator>
    void
    __uninitialized_fill_n_a(_ForwardIterator __first, _Size __n, 
                 const _Tp& __x, _Allocator& __alloc)
    {
      _ForwardIterator __cur = __first;
      __try
    {
      typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
      for (; __n > 0; --__n, ++__cur)
        __traits::construct(__alloc, std::__addressof(*__cur), __x);
    }
      __catch(...)
    {
      std::_Destroy(__first, __cur, __alloc);
      __throw_exception_again;
    }
    }

  template<typename _ForwardIterator, typename _Size, typename _Tp,
       typename _Tp2>
    inline void
    __uninitialized_fill_n_a(_ForwardIterator __first, _Size __n, 
                 const _Tp& __x, allocator<_Tp2>&)
    { std::uninitialized_fill_n(__first, __n, __x); }


  // Extensions: __uninitialized_copy_move, __uninitialized_move_copy,
  // __uninitialized_fill_move, __uninitialized_move_fill.
  // All of these algorithms take a user-supplied allocator, which is used
  // for construction and destruction.

  // __uninitialized_copy_move
  // Copies [first1, last1) into [result, result + (last1 - first1)), and
  //  move [first2, last2) into
  //  [result, result + (last1 - first1) + (last2 - first2)).
  template<typename _InputIterator1, typename _InputIterator2,
       typename _ForwardIterator, typename _Allocator>
    inline _ForwardIterator
    __uninitialized_copy_move(_InputIterator1 __first1,
                  _InputIterator1 __last1,
                  _InputIterator2 __first2,
                  _InputIterator2 __last2,
                  _ForwardIterator __result,
                  _Allocator& __alloc)
    {
      _ForwardIterator __mid = std::__uninitialized_copy_a(__first1, __last1,
                               __result,
                               __alloc);
      __try
    {
      return std::__uninitialized_move_a(__first2, __last2, __mid, __alloc);
    }
      __catch(...)
    {
      std::_Destroy(__result, __mid, __alloc);
      __throw_exception_again;
    }
    }

  // __uninitialized_move_copy
  // Moves [first1, last1) into [result, result + (last1 - first1)), and
  //  copies [first2, last2) into
  //  [result, result + (last1 - first1) + (last2 - first2)).
  template<typename _InputIterator1, typename _InputIterator2,
       typename _ForwardIterator, typename _Allocator>
    inline _ForwardIterator
    __uninitialized_move_copy(_InputIterator1 __first1,
                  _InputIterator1 __last1,
                  _InputIterator2 __first2,
                  _InputIterator2 __last2,
                  _ForwardIterator __result,
                  _Allocator& __alloc)
    {
      _ForwardIterator __mid = std::__uninitialized_move_a(__first1, __last1,
                               __result,
                               __alloc);
      __try
    {
      return std::__uninitialized_copy_a(__first2, __last2, __mid, __alloc);
    }
      __catch(...)
    {
      std::_Destroy(__result, __mid, __alloc);
      __throw_exception_again;
    }
    }
  
  // __uninitialized_fill_move
  // Fills [result, mid) with x, and moves [first, last) into
  //  [mid, mid + (last - first)).
  template<typename _ForwardIterator, typename _Tp, typename _InputIterator,
       typename _Allocator>
    inline _ForwardIterator
    __uninitialized_fill_move(_ForwardIterator __result, _ForwardIterator __mid,
                  const _Tp& __x, _InputIterator __first,
                  _InputIterator __last, _Allocator& __alloc)
    {
      std::__uninitialized_fill_a(__result, __mid, __x, __alloc);
      __try
    {
      return std::__uninitialized_move_a(__first, __last, __mid, __alloc);
    }
      __catch(...)
    {
      std::_Destroy(__result, __mid, __alloc);
      __throw_exception_again;
    }
    }

  // __uninitialized_move_fill
  // Moves [first1, last1) into [first2, first2 + (last1 - first1)), and
  //  fills [first2 + (last1 - first1), last2) with x.
  template<typename _InputIterator, typename _ForwardIterator, typename _Tp,
       typename _Allocator>
    inline void
    __uninitialized_move_fill(_InputIterator __first1, _InputIterator __last1,
                  _ForwardIterator __first2,
                  _ForwardIterator __last2, const _Tp& __x,
                  _Allocator& __alloc)
    {
      _ForwardIterator __mid2 = std::__uninitialized_move_a(__first1, __last1,
                                __first2,
                                __alloc);
      __try
    {
      std::__uninitialized_fill_a(__mid2, __last2, __x, __alloc);
    }
      __catch(...)
    {
      std::_Destroy(__first2, __mid2, __alloc);
      __throw_exception_again;
    }
    }

#if __cplusplus >= 201103L
  // Extensions: __uninitialized_default, __uninitialized_default_n,
  // __uninitialized_default_a, __uninitialized_default_n_a.

  template<bool _TrivialValueType>
    struct __uninitialized_default_1
    {
      template<typename _ForwardIterator>
        static void
        __uninit_default(_ForwardIterator __first, _ForwardIterator __last)
        {
      _ForwardIterator __cur = __first;
      __try
        {
          for (; __cur != __last; ++__cur)
        std::_Construct(std::__addressof(*__cur));
        }
      __catch(...)
        {
          std::_Destroy(__first, __cur);
          __throw_exception_again;
        }
    }
    };

  template<>
    struct __uninitialized_default_1<true>
    {
      template<typename _ForwardIterator>
        static void
        __uninit_default(_ForwardIterator __first, _ForwardIterator __last)
        {
      typedef typename iterator_traits<_ForwardIterator>::value_type
        _ValueType;

      std::fill(__first, __last, _ValueType());
    }
    };

  template<bool _TrivialValueType>
    struct __uninitialized_default_n_1
    {
      template<typename _ForwardIterator, typename _Size>
        static void
        __uninit_default_n(_ForwardIterator __first, _Size __n)
        {
      _ForwardIterator __cur = __first;
      __try
        {
          for (; __n > 0; --__n, ++__cur)
        std::_Construct(std::__addressof(*__cur));
        }
      __catch(...)
        {
          std::_Destroy(__first, __cur);
          __throw_exception_again;
        }
    }
    };

  template<>
    struct __uninitialized_default_n_1<true>
    {
      template<typename _ForwardIterator, typename _Size>
        static void
        __uninit_default_n(_ForwardIterator __first, _Size __n)
        {
      typedef typename iterator_traits<_ForwardIterator>::value_type
        _ValueType;

      std::fill_n(__first, __n, _ValueType());
    }
    };

  // __uninitialized_default
  // Fills [first, last) with std::distance(first, last) default
  // constructed value_types(s).
  template<typename _ForwardIterator>
    inline void
    __uninitialized_default(_ForwardIterator __first,
                _ForwardIterator __last)
    {
      typedef typename iterator_traits<_ForwardIterator>::value_type
    _ValueType;

      std::__uninitialized_default_1<__is_trivial(_ValueType)>::
    __uninit_default(__first, __last);
    }

  // __uninitialized_default_n
  // Fills [first, first + n) with n default constructed value_type(s).
  template<typename _ForwardIterator, typename _Size>
    inline void
    __uninitialized_default_n(_ForwardIterator __first, _Size __n)
    {
      typedef typename iterator_traits<_ForwardIterator>::value_type
    _ValueType;

      std::__uninitialized_default_n_1<__is_trivial(_ValueType)>::
    __uninit_default_n(__first, __n);
    }


  // __uninitialized_default_a
  // Fills [first, last) with std::distance(first, last) default
  // constructed value_types(s), constructed with the allocator alloc.
  template<typename _ForwardIterator, typename _Allocator>
    void
    __uninitialized_default_a(_ForwardIterator __first,
                  _ForwardIterator __last,
                  _Allocator& __alloc)
    {
      _ForwardIterator __cur = __first;
      __try
    {
      typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
      for (; __cur != __last; ++__cur)
        __traits::construct(__alloc, std::__addressof(*__cur));
    }
      __catch(...)
    {
      std::_Destroy(__first, __cur, __alloc);
      __throw_exception_again;
    }
    }

  template<typename _ForwardIterator, typename _Tp>
    inline void
    __uninitialized_default_a(_ForwardIterator __first,
                  _ForwardIterator __last,
                  allocator<_Tp>&)
    { std::__uninitialized_default(__first, __last); }


  // __uninitialized_default_n_a
  // Fills [first, first + n) with n default constructed value_types(s),
  // constructed with the allocator alloc.
  template<typename _ForwardIterator, typename _Size, typename _Allocator>
    void
    __uninitialized_default_n_a(_ForwardIterator __first, _Size __n, 
                _Allocator& __alloc)
    {
      _ForwardIterator __cur = __first;
      __try
    {
      typedef __gnu_cxx::__alloc_traits<_Allocator> __traits;
      for (; __n > 0; --__n, ++__cur)
        __traits::construct(__alloc, std::__addressof(*__cur));
    }
      __catch(...)
    {
      std::_Destroy(__first, __cur, __alloc);
      __throw_exception_again;
    }
    }

  template<typename _ForwardIterator, typename _Size, typename _Tp>
    inline void
    __uninitialized_default_n_a(_ForwardIterator __first, _Size __n, 
                allocator<_Tp>&)
    { std::__uninitialized_default_n(__first, __n); }


  template<typename _InputIterator, typename _Size,
       typename _ForwardIterator>
    _ForwardIterator
    __uninitialized_copy_n(_InputIterator __first, _Size __n,
               _ForwardIterator __result, input_iterator_tag)
    {
      _ForwardIterator __cur = __result;
      __try
    {
      for (; __n > 0; --__n, ++__first, ++__cur)
        std::_Construct(std::__addressof(*__cur), *__first);
      return __cur;
    }
      __catch(...)
    {
      std::_Destroy(__result, __cur);
      __throw_exception_again;
    }
    }

  template<typename _RandomAccessIterator, typename _Size,
       typename _ForwardIterator>
    inline _ForwardIterator
    __uninitialized_copy_n(_RandomAccessIterator __first, _Size __n,
               _ForwardIterator __result,
               random_access_iterator_tag)
    { return std::uninitialized_copy(__first, __first + __n, __result); }

  template<typename _InputIterator, typename _Size, typename _ForwardIterator>
    inline _ForwardIterator
    uninitialized_copy_n(_InputIterator __first, _Size __n,
             _ForwardIterator __result)
    { return std::__uninitialized_copy_n(__first, __n, __result,
                     std::__iterator_category(__first)); }
#endif

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace