protected and private in C++ and C#

[My4thPersonality]

1st, simple question, is there a protected in C#?

I mean a comparable keyword like the C++ protected, which defines a member
as accessable for decendants, but not for the outside world.

Then, a more complicated question, is privat in C#, then comparable with
protected, or private in C++. Or to say it in other words, if I declare a
member private in C#, can I access it in a decendant class?

[Stefan Simek]

Re: protected and private in C++ and C#

My4thPersonalit y wrote:[color=blue]
> 1st, simple question, is there a protected in C#?
>
> I mean a comparable keyword like the C++ protected, which defines a member
> as accessable for decendants, but not for the outside world.
>
> Then, a more complicated question, is privat in C#, then comparable with
> protected, or private in C++. Or to say it in other words, if I declare a
> member private in C#, can I access it in a decendant class?
>
>[/color]
The protected and private in C# have the same meaning as in C++. C#
extends access modifiers by adding internal and protected internal,
which are equal to public and protected with respect to the module they
appear in and private to the outer world.

[Stefan Simek]

Re: protected and private in C++ and C#

My4thPersonalit y wrote:[color=blue]
> 1st, simple question, is there a protected in C#?
>
> I mean a comparable keyword like the C++ protected, which defines a member
> as accessable for decendants, but not for the outside world.
>
> Then, a more complicated question, is privat in C#, then comparable with
> protected, or private in C++. Or to say it in other words, if I declare a
> member private in C#, can I access it in a decendant class?
>
>[/color]
The protected and private in C# have the same meaning as in C++. C#
extends access modifiers by adding internal and protected internal,
which are equal to public in the module in which they appear and private
or protected respectively to the outer world.

[Jon Skeet [C# MVP]]

Re: protected and private in C++ and C#

Stefan Simek <simek.nospam@t riaxis.nospam.s k> wrote:[color=blue][color=green]
> > Then, a more complicated question, is privat in C#, then comparable with
> > protected, or private in C++. Or to say it in other words, if I declare a
> > member private in C#, can I access it in a decendant class?[/color][/color]
[color=blue]
> The protected and private in C# have the same meaning as in C++.[/color]

Is that strictly true? I *thought* that in C++, you couldn't access the
private members of one instance from another instance (whereas you can
in C#). This is only based on what others have said, however - I
haven't checked the spec.

There's also the concept of private inheritance in C++, but not in C#.

--
Jon Skeet - <skeet@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[Andreas Mueller]

Re: protected and private in C++ and C#

Jon Skeet [C# MVP] wrote:[color=blue]
> Stefan Simek <simek.nospam@t riaxis.nospam.s k> wrote:
>[color=green][color=darkred]
>>>Then, a more complicated question, is privat in C#, then comparable with
>>>protected, or private in C++. Or to say it in other words, if I declare a
>>>member private in C#, can I access it in a decendant class?[/color][/color]
>
>[color=green]
>>The protected and private in C# have the same meaning as in C++.[/color]
>
>
> Is that strictly true? I *thought* that in C++, you couldn't access the
> private members of one instance from another instance (whereas you can
> in C#). This is only based on what others have said, however - I
> haven't checked the spec.[/color]
Yes, you can access the private fields from another instance in C++.[color=blue]
>
> There's also the concept of private inheritance in C++, but not in C#.[/color]


HTH,
Andy
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[Jon Skeet [C# MVP]]

Re: protected and private in C++ and C#

Andreas Mueller <me@privacy.net > wrote:[color=blue][color=green]
> > Is that strictly true? I *thought* that in C++, you couldn't access the
> > private members of one instance from another instance (whereas you can
> > in C#). This is only based on what others have said, however - I
> > haven't checked the spec.[/color][/color]
[color=blue]
> Yes, you can access the private fields from another instance in C++.[/color]

My mistake. It must be another language I'm thinking of... I wonder
which?

--
Jon Skeet - <skeet@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[Mike Schilling]

Re: protected and private in C++ and C#


"Jon Skeet [C# MVP]" <skeet@pobox.co m> wrote in message
news:MPG.1e221c 7e7812760598cc3 f@msnews.micros oft.com...[color=blue]
> Andreas Mueller <me@privacy.net > wrote:[color=green][color=darkred]
>> > Is that strictly true? I *thought* that in C++, you couldn't access the
>> > private members of one instance from another instance (whereas you can
>> > in C#). This is only based on what others have said, however - I
>> > haven't checked the spec.[/color][/color]
>[color=green]
>> Yes, you can access the private fields from another instance in C++.[/color]
>
> My mistake. It must be another language I'm thinking of... I wonder
> which?[/color]

None I know of. In fact, "How come instance 1 can access private members of
instance 2?" seems to be a common newbie question about C#, C++, and Java
alike.

[David Anton]

Re: protected and private in C++ and C#

Actually, C++/CLI has "internal" and also has an equivalent to C#'s protected
internal: "public protected".
--
David Anton

https://www.tangiblesoftwaresolutions.com

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"Stefan Simek" wrote:
[color=blue]
> My4thPersonalit y wrote:[color=green]
> > 1st, simple question, is there a protected in C#?
> >
> > I mean a comparable keyword like the C++ protected, which defines a member
> > as accessable for decendants, but not for the outside world.
> >
> > Then, a more complicated question, is privat in C#, then comparable with
> > protected, or private in C++. Or to say it in other words, if I declare a
> > member private in C#, can I access it in a decendant class?
> >
> >[/color]
> The protected and private in C# have the same meaning as in C++. C#
> extends access modifiers by adding internal and protected internal,
> which are equal to public in the module in which they appear and private
> or protected respectively to the outer world.
>[/color]