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Postings from February 2002
At 3:43 PM +0000 2/13/02, Dave Mitchell wrote:
>Dan Sugalski <dan@sidhe.org> wrote:
>> >So in the following:
>> >
>> >my Complex $c = 3+4i;
>> >my $plain = 1.1;
>> >$plain = $c;
>> >
>> >I presume that $plain ends up as type Complex (with value 3+4i)?
>>
>> Yup.
>>
>> >If so, how does $plain know how to "morph itself into the RHS's type"?
>>
>> The general rule is: If a PMC is not a fixed type, it tosses its
>> contents and becomes whatever's assigned to it. If it is a fixed
>> type, it extracts what it can as best it can from the source and uses
>> that.
>
>Thanks.
>I just want to assert/clarify that the job of "becoming whatever's
>assigned to it" is delegated to the src PMC, since $plain won't itself know
>how to do this?
Sort of--delegated to the source PMC's vtable in parts. The sequence goes:
Destination PMC calls its own destructor, if it has one
Destination PMC calls clone on the source PMC, passing itself in
as the PMC to be cloned into.
--
Dan
--------------------------------------"it's like this"-------------------
Dan Sugalski even samurai
dan@sidhe.org have teddy bears and even
teddy bears get drunk
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