On Tue, Jul 26, 2005 at 05:59:20PM -0400, Joshua Juran wrote:
> On Jul 26, 2005, at 5:35 PM, Abigail wrote:
>
> >On Tue, Jul 26, 2005 at 05:37:39PM +0100, Nicholas Clark wrote:
> >>
> >>So is "wantarray's value is only specified within a subroutine or
> >>method
> >>which was called directly by other perl code" true?
> >
> >No.
> >
> > $ perl -wle 'print eval "wantarray"'
> > 1
> > $
> >
> >
> >No subroutine, no method.
>
> The eval is still a block scope from which one can return, so wantarray
> indicates the context provided to the eval block, not to the -e script,
> and print provides it a list context.
>
> Compare:
>
> $ perl -wle 'print eval { eval { wantarray } }'
> 1
> $ perl -wle 'print eval { eval { wantarray }; "" }'
> Useless use of wantarray in void context at -e line 1.
>
> $
>
> It would be helpful to have a term which means 'block from which one
> can return', i.e. a sub or eval. Suppose we use the word 'frame'.
> Then I'd propose the statement above except with 'frame' instead of
> 'subroutine or method'.This whole exercise started because people found the current documentation unclear. I don't think that introducing the concept "frame" is going to make the documentation any more clear. Perhaps less. Abigail
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