Re: Copy vector in Ada

["Yannick Duchêne (Hibou57)" <yannick_duchene@yahoo.fr>]

Le Fri, 02 Nov 2012 23:03:05 +0100, Maciej Sobczak  
<see.my.homepage@gmail.com> a écrit:
>> When the assignment operator
>> would not be safe to use and/or would cost too much to the  
>> implementation
>> to be made available safely, then Ada has well know way to exclude it  
>> from
>> the interface: “limited type”.
>
> Similarly in C++ - if the assignment operator is too costly (or just  
> impossible) to implement, there is a way to ban it.

Really? That's a hot news to me. At least at the time I used it (~ 2000),  
there was nothing like that, while Ada already had limited types since  
long. And I'm not even sure there was a way to redefine the copy operation  
(may be this came in a later C++ definition release, or else I forgot) or  
anything like adjustments.

>> So, yes, if “:=” is available in the interface, that means it's not a  
>> hack
>> to use it.
>
> Unless the author of the type forgot to implement it properly?
Not in a standard Ada package. The post is about the standard containers,  
there is not fears to have.


-- 
“Syntactic sugar causes cancer of the semi-colons.” [1]
“Structured Programming supports the law of the excluded muddle.” [1]
[1]: Epigrams on Programming — Alan J. — P. Yale University