On Wed, Aug 30, 2000 at 02:26:08PM +0800, Kenneth Lee wrote:
> dear all,
>
> it seems all the "lvalue sub" RFCs haven't mentioned this.
> currently we can do
>
> $str = "foo bar";
> substr($str, 4, 0) = "baz ";
>
> and $str will become "foo baz bar". should we be able to do
> this with lvalue-subs? how can one returns "pointer" to a
> portion of a scalar?
The best way to implement this, at least currently, is with a tied scalar
that uses substr underneath, or even does things manually. If the lvalue
behaviour adopted looks like the kind we now have (where you have to return
an lvalueable er, value) returning a tied variable will probably be the only
way to control what's assigned.
Michael
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