On 2/7/08 4:16 PM, Michael O'Brien wrote:
> I'm trying to find the scope rules for constructor initializers and for
> function parameter default values. If someone could point me to a
> document or clarify these that would be great.
>
> I've read bits and pieces. For constructor initializers:
>
> class Shape {
> function Shape():
> leftSide = rightSide
> {
> }
>
> function render(arg1 = expression) {
> }
> }
>
> In the constructor initializers, I presume the leftSide has a scope
> equal to just outside the constructor and the rightSide binds to inside
> the constructor. Is this right?
'leftSide' targets the instance and so must be and instance variable.
'rightSide' has a scope that includes the constructor parameters, class
statics and scopes beyond.
>
> Also, can "this" be used in either right or left side?
Since 'this' is implied on the left side and meaningless on the right, I'd
say not be both.
>
> For function default arguments, is the scope of the expression just
> outside the function?
This has been debated recently. I don't recall that there was a resolution.
My thinking is is that default parameter expression should be scoped to the
scope just outside the function. This is how the RI currently works, FWIW.
Jd
>
> Michael
>
>
>
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