Re: I have a pointer, need to call method that takes a const

From:
Ulrich Eckhardt <eckhardt@satorlaser.com>
Newsgroups:
microsoft.public.vc.language
Date:
Tue, 08 Jan 2008 09:39:20 +0100
Message-ID:
<vepb55-odm.ln1@satorlaser.homedns.org>
bpelot@hotmail.com wrote:
[ Note here: if you quote me, please pay me some respect by doing it
properly. Here you are quoting Ben Voigt, and I think he deserves the same
treatment. ]

What's the prototype for Copy()? Is it a reference parameter? You are
dereferencing the pArray pointer in the call and I wouldn't have expected
that was necessary.


That was my thought too (makes me feel a little better).


I don't understand why you are passing around pointers at all when the
pointer can't be NULL anyway. That is what C++ uses references for.

The prototype
is: void Copy( const CDWordArray& src );

If I try it as suggested:
OrigArray.Copy (pArray);
I get a compiler error:
error C2664: 'Copy' : cannot convert parameter 1 from
      'class CDWordArray *' to
'const class CDWordArray &'


I hope this should be clear now, using the formatting above. You actually
have to dereference a pointer to get a reference. The additional 'const' is
then added implicitly.

Uli

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