From:	"Campbell, Rolf [SKY:1U32:EXCH]" <moscoop AT americasm01 DOT nt DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Qualifiers
Date:	Tue, 22 Feb 2000 10:58:09 -0500
Organization:	Nortel Networks
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To:	djgpp AT delorie DOT com
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Brian Ronk wrote:

> Ok, now that my timing problam is fixed, I've got
> a new one for you.  I can't figure out the error
> for the life of me.  I have an Array class, so I
> can get the size very easily, etc.  I used it
> inside another class, and wanted to use it in an
> ostream, so I could save the info.  My line is
> this:
>   int size=map.Links.Size();
> The error is this:
>   passing 'const Array<unsigned int>' as 'this'
> argument for 'int Array<unsigned int>::Size()'
> discards qualifiers
>
> Any ideas what I need to do to fix this?  Thanks
> again.

    Yes.

You need to add the 'const' qualifier to your 'Size' method.

int Array<T>::Size() const
{
  //body
}

What that does, is pass 'this' as 'Array<T>* const this' which means
that you will not be able to modify any class members in that function.


--
(\/) Rolf Campbell (\/)

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