Re: Discovering the lvaluable function behind the reference

When dealing with MAGIC, you have to remember that its a linked list and a "thing" may have more than one form of magic applied. You have to walk the MAGIC/MOREMAGIC list.
Finding out that %imahash is the name of lexical (or global) that was passed in is not trivial. In essense your job becomes: examine your calling context's pad and see if the hash is present there. If so, that's the name. Otherwise you have to find it in the symbol table by doing a search. If that fails then the hash might be present in a Lexical::Typeglob and you aren't going to find it unless you repeat the search except examing the contents of typeglob references as well.

Comment on Re: Discovering the lvaluable function behind the reference

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Magic (Re: Re: Discovering the lvaluable function behind the reference) by Mr. Muskrat (Canon) on May 29, 2003 at 18:57 UTC
As you probably already know, I have only recently started delving into the magic behind the scenes. Do you have any suggestions for this magician's apprentice? I think that it would be best, for all parties, if I hold off on attempting #2 until I am more in tune with the magic.	[reply]
Re: Magic (Re: Re: Discovering the lvaluable function behind the reference) by diotalevi (Canon) on May 29, 2003 at 19:17 UTC
Read all the available documentation: perlguts, perlhack, Gisle Aas' Illustrated PerlGuts, Simon Cozens on modifying the optree, Simon Cozens on perl internals, My own list of interesting links. Get used to using Devel::Peek, read the header files in the source code, heck - read relevant parts of the source code. Even better - create a private build of perl with symbols so you can step through a perl program using the gdb debugger. Remember to have fun.	[reply]