Deque... (Re: [Patch] libstdc++/23425)

[Paolo Carlini]

Howard Hinnant wrote:

> A very minor nit:  We're passing around the allocator by value for 
> the purpose of function dispatching.  Can we change that to by ref?  
> I'd like to get ready for stateful allocators.  I believe this would 
> be a fairly minor mod to  _M_get_Tp_allocator() and its clients.  
> Perhaps starting with:
>
>       _Tp_alloc_type&
>       _M_get_Tp_allocator()
>       { return *static_cast<_Tp_alloc_type*>(&this->_M_impl); }
>
>       _Tp_alloc_type const&
>       _M_get_Tp_allocator() const
>       { return *static_cast<const _Tp_alloc_type*>(&this->_M_impl); }

... but those are *inline*! That means we can do that change also within
the present library ABI! Will prepare soon a follow-up patch for all the
containers...

Thanks,
Paolo.

P.S. Double checked that are not present in the final tree-level dumps
even at -O0.