Re: Namespace bug?
Re: Namespace bug?
- Subject: Re: Namespace bug?
- From: David Fang <email@hidden>
- Date: Sat, 19 Nov 2005 01:24:24 -0500 (EST)
Hi,
(Answer below)
> the cpp file looks like so
>
> #include "Comments.h"
>
> using namespace DOM;
>
> Comments::Comments()
> {
> }
>
> the error i get is the Comments can't be used without a type. Then I
> get told that it conflicts with a struct in AIFF.H (we include
> Carbon.h into all of our files by default. (i am working on a carbon
> project/Cocoa mixed project).
>
> However if change my .cpp file to be....
>
> DOM::Comments::Comments()
> {
> }
>
> .. and add DOM:: to function declarations all is fine. Shouldn't the
> compiler recognize i am in a new namespace or do i have to qualify
> the declarations because of a global Comments?
That's not quite the way namespaces work. When you declare/define
something it has to be *in* the namespace either by:
Namespace::Class::Member(...)
or
namespace Namespace {
Class::Member(...) { ... }
}
using declarations are for *looking up* references in other namespaces.
You can just write
namespace DOM {
Comments::Comments() ...
}
David Fang
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