[baltimorepm] Closures and Late-Binding Subroutine Calls

[Alan Grover]

This sounds like "dynamic" context from before the days of "lexical"
context (see early lisp).

And I haven't tried that sort of Evil in perl yet. It's not a concept
that is in favor, though it has some applications. Cf. "goto".

Putting the closure in a special package (e.g. "MyDynamicPackage"), and
autoload, plus hunting up the stack ("caller()") for the package/context
where you want to resolve it, might do it.

Also, this is how "hygenic" macros  work (again, in scheme/lisp):
variables bind to the lexical context of the macro, but "free" variables
bind to the execution context. Maybe look for various "macro" mechanisms
in cpan?

On 04/26/2012 10:24 AM, Stephen Belcher wrote:
> Hi all,
> 
> I'm wondering if anyone has an answer to
> this? https://gist.github.com/2499830
> 
> Essentially, I want to create a coderef while in the scope of one
> package, and delay binding of the subroutine calls until the actual
> execution, which will happen in or relative to another package, meaning
> that the subroutines that eventually resolve will be the ones located in
> the second package, not the first. This is different from what normally
> happens in closures.
> 
> I can think of a few ways around the problem I'm trying to solve which
> aren't pretty, but I really like this one, cause I'm going for pretty,
> and I hope the answer's not just "you can't do that in Perl without XS
> Dark Magicks and/or a source filter".
> 
> --Stephen
> 
> 
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-- 
Alan Grover
awgrover at mail.msen.com
+1.734.476.0969

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