Visibility modifiers: public, private, ??

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_iycrd - 08 Mar 2006 07:40 GMT

I have one class that is used as a low-level utility class by other
classes in the same assembly. I'd like to make sure it's not visible
outside the assembly.

C# has modifiers 'public', 'private', and 'internal'. Internal
relates to access within an assembly. Does C++ have anything
analogous?

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Bruno van Dooren - 08 Mar 2006 07:57 GMT

> I have one class that is used as a low-level utility class by other
> classes in the same assembly. I'd like to make sure it's not visible
[quoted text clipped - 3 lines]
> relates to access within an assembly. Does C++ have anything
> analogous?

If you are making a managed classlib in C++/CLI, then yes. It allows the
same access control mechanisms as C#.

In native C++ there is no such thing.
You have public, private, friend and protected, but there is no difference
in method / member access between usage inside or outside a library.

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Kind regards,
Bruno.
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David Anton - 08 Mar 2006 15:04 GMT

Both managed C++ (2003) and C++/CLI have the equivalent:

C++/CLI:
If a top-level type: use "private"
else: use "internal"

Managed C++ (2003):
use "public private"

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David Anton
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_iycrd - 09 Mar 2006 07:00 GMT

>Both managed C++ (2003) and C++/CLI have the equivalent:
>
>C++/CLI:
>If a top-level type: use "private"
>else: use "internal"

The 'UtilClass' in question needs to be used by multiple classes in
the same assembly, so it must be top-level. Looks like there is no
way to restrict UtilClass so it's not visible outside the assembly?

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David Anton - 09 Mar 2006 15:00 GMT

(As I posted previously):
C++/CLI:
If a top-level type: use "private" - this will allow use from anywhere in
the assembly, but not outside of the assembly (if not top-level, use
"internal").

Managed C++ (2003):
use "public private" (the more restrictive modifier applies outside the
assembly, making it invisible outside the assembly).

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David Anton
www.tangiblesoftwaresolutions.com
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> >Both managed C++ (2003) and C++/CLI have the equivalent:
> >
[quoted text clipped - 5 lines]
> the same assembly, so it must be top-level. Looks like there is no
> way to restrict UtilClass so it's not visible outside the assembly?

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Visibility modifiers: public, private, ??

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