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Postings from January 2001
On Sun, Jan 07, 2001 at 01:14:39PM +0000, Simon Cozens wrote:
> On Fri, Jan 05, 2001 at 10:10:54AM -0800, Stephen McCamant wrote:
> > If you like being able to assign to shift, I'd like to hear an argument why.
>
> I'm not assigning to shift, I'm assigning to the return value of the
> subroutine. The documentation says it is possible to return a modifiable value
> from a subroutine: sub foo : lvalue { shift } returns $_[0].
> I consider these to be equivalent:
>
> sub foo { $_[0] = 7; } foo($a)
> sub foo :lvalue {shift} foo($a) = 7
>
These are not equivalent:
sub foo { $_[0] = 7; } foo($a)
sub foo { shift = 7; } foo($a)
So I don't know why you would expect your examples to be equivalent.
"it is possible to return a modifiable value from a subroutine" does not at
all mean the same thing as "all values returned from a subroutine are
modifiable".
Ronald
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