🚀 go-pugleaf

Looks to me like OnDraw wants a reference to an object, which is a veiled
way of sending the address of the object, rather than the value of the
object, to the function.
In order to have this, you must have the object itself, i.e. an instance of
the class CP_Region.
In your second example, you have an instance: cpr.
In your first example, you don't. All you have is the value.

Try this:

int Myfuncref(int& x)
{
    return(x);
}

int Myfuncval(int x)
{
    return(x);
}

Then in main()...

q=Myfuncref(2);    // This line generates an error.
q=Myfuncval(2);

You'll get a compiler error. The reason is that you can't take the address
of 2. Same problem you're having. If you want to call by reference, you
have to have an object, not just the value it leaves behind.

Good luck.

-Ron Webster

Gordon Tillman wrote:

> Howdy All,
>
> I was recompiling my CPLAT sources (from Ken Stahlman) under CWP6 and
> encountered several places in the code where I am now receiving this
> error. (Don't worry about what a CP_Region is...suffice it to say its a
> valid thing)s:
>
>     Error: illegal implicit conversion from 'CP_Region' to 'CP_Region &'
>
> Here is the snippet of code that causes the error:
>
>     OnDraw( CP_Region(fPlatformWindow->visRgn) );
>
> Now, if I change the code to read like this:
>
>     CP_Region cpr(fPlatformWindow->visRgn);
>     OnDraw( cpr);
>
> Then it compiles fine.  I wonder why this is so???
>
> --gordon