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template<class _Elem,
class _Traits,
class _Ax>
class basic_string
: public _String_val<_Elem, _Ax>
{
...
typedef _String_val<_Elem, _Ax> _Mybase;
typedef typename _Mybase::_Alty _Alloc;
...
template<class _Ty,
class _Alloc>
class _String_val
: public _String_base
{
...
typedef typename _Alloc::template
rebind<_Ty>::other _Alty;
...
template<class _Ty>
class allocator
: public _Allocator_base<_Ty>
{
...
template<class _Other>
struct rebind
{ // convert an allocator<_Ty> to an allocator <_Other>
typedef allocator<_Other> other;
};
...