Jonathan de Boyne Pollard wrote:
>
> T.E.Dickey wrote:
>> Steve Clamage <clamage@eng.sun.com> wrote:
>> >> Most importantly, you lose a lot of good idiom when trying to
>> >> do that.
>>
>> > Can you provide an example? I don't know of any C idioms that
>> > represent good programming practice that are invalid in C++.
>> > The exception would be use of malloc, as noted above.
>>
>> C++'s notion of the scope of const differs from C's [...]
>
> You mean "linkage", not "scope", surely ?

Both notions of scope and linkage are different in C and C++.

Linkage difference:

    const int  x = 2;   // C++: implicit 'static',
                        // C:   implicit 'extern'

Scope difference:

    struct Foo
    {
        struct Bar      // C++: Bar not visible outside Foo except
        {               //      as Foo::Bar,
            ...         // C:   struct Bar visible outside Foo
        };
        ...
    };

-- David R. Tribble, david@tribble.com, http://www.david.tribble.com --
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"T.E.Dickey" wrote:
>
> In comp.std.c Jonathan de Boyne Pollard <J.deBoynePollard@tesco.net> wrote:
>
> > T.E.Dickey wrote:
> >> C++'s notion of the scope of const differs from C's [...]
>
> > You mean "linkage", not "scope", surely ?
>
> Yes (the technically correct term, though usage makes them near-synonyms --
> some people object to my terminology, but usually not my spelling ;-)

Scope and linkage are very different things. Usage that treats them as
near-synonyms is guaranteed to both reflect and cause misunderstandings.
Read up on them before commenting further.
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In comp.std.c Nick Maclaren <nmm1@cus.cam.ac.uk> wrote:

> Did you mean to post this to comp.std.c?

I posted it to comp.std.c, as a followup to someone's cross-posting to both
groups (I noticed this week some problem with my ISP's list of moderators,
but haven't had the time to track it down since it's not on a local machine -
will do that on the weekend).

--
Thomas E. Dickey
dickey@clark.net
http://www.clark.net/pub/dickey


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T.E.Dickey wrote:
> In comp.std.c Steve Clamage <clamage@eng.sun.com> wrote:
> >>Most importantly, you lose a lot of good idiom when trying to
> >>do that.
>
> > Can you provide an example? I don't know of any C idioms that
> > represent good programming practice that are invalid in C++.
> > The exception would be use of malloc, as noted above.
>
> C++'s notion of the scope of const differs from C's [...]

You mean "linkage", not "scope", surely ?


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In article <hcPK3.910$N64.24833@dfw-read.news.verio.net>,
T.E.Dickey <dickey@shell.clark.net> wrote:
>In comp.std.c Jonathan de Boyne Pollard <J.deBoynePollard@tesco.net> wrote:
>
>> T.E.Dickey wrote:
>>> C++'s notion of the scope of const differs from C's [...]
>
>> You mean "linkage", not "scope", surely ?
>
>Yes (the technically correct term, though usage makes them near-synonyms --
>some people object to my terminology, but usually not my spelling ;-)

Did you mean to post this to comp.std.c?


Regards,
Nick Maclaren,
University of Cambridge Computing Service,
New Museums Site, Pembroke Street, Cambridge CB2 3QG, England.
Email:  nmm1@cam.ac.uk
Tel.:  +44 1223 334761    Fax:  +44 1223 334679


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