Re: [boost] [optional] Thoughts on disallowing assignment for wrapped references.

Subject: Re: [boost] [optional] Thoughts on disallowing assignment for wrapped references.
From: Nevin Liber (nevin_at_[hidden])
Date: 2011-09-06 15:16:20

On 6 September 2011 04:57, Mostafa <mostafa_working_away_at_[hidden]> wrote:
>> 'ot = u' deals with the existence of the underlying object, while '*ot
>> = v' deals with the value of the underlying object.  Now, in C++,
>> there is no such thing as existence without value, so you cannot
>> escape dealing with the underlying value in the expression 'ot = u'.
>> That holds for non-reference types as well as for references.
>
> The Boost.Optional documentation begs to differ, direct quote:
>
> "Rebinding semantics for the assignment of initialized optional references
> has been chosen to provide consistency among initialization states even at
> the expense of lack of consistency with the semantics of bare C++
> references."

I was looking at it that the "value" of a reference is the object it
refers to, and not the value of that object itself.  Sorry for not
being clear.
-- 
 Nevin ":-)" Liber  <mailto:nevin_at_[hidden]>  [phone]