Re: proto-rfc. Elements of @_ should be read-only.

[Tom Christiansen]

>At 12:47 AM 8/4/00 -0400, Ken Fox wrote:
>>John Tobey wrote:
>> > The Perl 5 (and older) behavior may preclude some optimizations.
>>
>>I can't think of any optimizations @_ assignment precludes.
>>If we don't analyze dataflow to figure out if a sub modifies its
>>args, then we just assume it will.

>If we know how a sub accesses @_, we can optimize appropriately. If we 
>don't know, odds are we're not doing the sorts of optimizations that would 
>need the information.

And to know whether you can know, there should be disqualifiers, like

    do FILE
    eval STRING
    &fnaddr
    &$fnname

--tom