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It seems to me that you are viewing :lvalues as a C programmer would, something that behaves as a piece of memory. Wheras most people here are viewing lvalues as a VB or Java programmer would: disguised method calls. Maybe the solution is to provide both? I sure would like to have a way for

$obj->method=$foo;
be the same as
$obj->method($foo);

It would be nice if Perl automagically made

$obj->method++;

be the same as

$obj->method($obj->method()+1);

But it wouldn't bother me too much if it didn't.

The point here is that folk would be happy to forgo some of the more extreme uses of :lvalue subs like you and ysth post if they could just easily write validation code for the simpler cases. And we'd really like to do it in Perl 5. :-)

UPDATE: This was discussed in the CB and there seemed to be some agreement that there is room for the souped up, can do anything :lvalue as well as a more constrained :assignable version that has much simpler semantics. In fact it seems to me that the :assignable version could probably be implemented with :lvalue and better callbacks once Perl 6 is around tested and stable.

---
demerphq


In reply to Re^6: Experimenting with Lvalue Subs by demerphq
in thread Experimenting with Lvalue Subs by Limbic~Region

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