Re: Singleton and static function

From:
Mosfet <mosfet@anonymous.org>
Newsgroups:
comp.lang.c++
Date:
Fri, 31 Oct 2008 21:50:23 +0100
Message-ID:
<490b6f90$0$19715$426a74cc@news.free.fr>
Salt_Peter a ?crit :

On Oct 31, 10:27 am, John Doe <mos...@anonymous.org> wrote:

Hi,

I have a singleton class defined like this :

class UIManager : public CSingleton<UIManager>,
                                  public CObject
{
protected:
        DECLARE_DYNAMIC(UIManager)
        friend class CSingleton<UIManager>;

        UIManager();
        virtual ~UIManager();

public:
...

};

and I was using this code like this :

A)
UIManager* l_pUiMgr = UIManager::GetInstance();
ASSERT (l_pUiMgr != NULL);
l_pUiMgr->GetResText( a_ResId, bStripHtml);

But I was fed up with always typing this so I have declared below my
UIManager class a static function :

static inline UIManager& UIManager() { return *(UIManager::GetInstance()); }

and I wanted to be able to call it like that :

UIManager().GetResText( a_ResId, bStripHtml);

The problem is I get some compilations errors with the code in A)

5>c:\wce_v42\inc\BaseView.h(227) : error C2065: 'l_pUiMgr' : undeclared
identifier

Why I cannot write UIManager* now ?


Why don't you tell us? l_pUiMgr is an undeclared identifier. You are
doing something wrong, what that might be we don't know. Put together
a simple, compileable case forth without MS-specific macros.


I mean that the following line doesn't compile anymore :
UIManager* l_pUiMgr = UIManager::GetInstance();
but maybe I forgot one include ...

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