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Newsgroups: comp.lang.ada
Subject: Re: Copy vector in Ada
Date: Sat, 03 Nov 2012 00:45:50 +0100
Organization: Ada @ Home
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Date: 2012-11-03T00:45:50+01:00
List-Id: <comp.lang.ada>

Le Fri, 02 Nov 2012 23:03:05 +0100, Maciej Sobczak  =

<see.my.homepage@gmail.com> a =C3=A9crit:
>> 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: =E2=80=9Climited type=E2=80=9D.
>
> 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 operati=
on  =

(may be this came in a later C++ definition release, or else I forgot) o=
r  =

anything like adjustments.

>> So, yes, if =E2=80=9C:=3D=E2=80=9D is available in the interface, tha=
t 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.


-- =

=E2=80=9CSyntactic sugar causes cancer of the semi-colons.=E2=80=9D [1]
=E2=80=9CStructured Programming supports the law of the excluded muddle.=
=E2=80=9D [1]
[1]: Epigrams on Programming =E2=80=94 Alan J. =E2=80=94 P. Yale Univers=
ity