David Storrs <[EMAIL PROTECTED]> writes:
> So, as I sweat here in the salt mines of C++, longing for the
> cleansing joy that Perl(5 or 6, I'd even take 4) is, I find myself
> with the following problem:
>
> Frequently, I find myself writing stuff like this:
>
> void Ficp400::SaveRow(long p_row)
> {
> // if p_row is marked as deleted, return
> if (GetStatus(row) & FLX_ROW_DELETE) { return; }
>
> ...
> }
>
> As a general rule, I don't like comments. When I see a comment, I
> want to turn it into a function name. So, I keep wanting to be able
> to write the above code like so:
>
>
>
> void Ficp400::SaveRow(long p_row)
> {
> Return_If_Is_Deleted(p_row);
>
> ...
> }
>
> Now, in C++ (or P6, FTM), I could make this work via a macro, but
> that's ugly. In P6, I could make it work by passing the current
> continuation down to Return_If_Is_Deleted and call the continuation if
> the row is in fact deleted, but that will require an extra param. Is
> there a way to make it work as written? I'm thinking maybe the
> C<caller> object would have something that would allow me to jump to
> the right point (i.e., caller[2]).
Something in Damian's talk this morning reminded me that:
void Ficp400::SaveRow(long p_row) {
when row_is_deleted { }
...
}
Will do a magic return. I do wonder if it'll simply return from
SaveRow, or from the innermost enclosing C<given>
--
Piers
