Re^3: How Are Attributes Useful?

It is my understanding that attributes are handled in the compiling phase (or rather non-runtime phases) ..

Well, I disagree, but without either the knowledge of how perl works or the time to delve into the perl code, I can't back up my feeling about this. I think both compile-time *and* run-time behvaiour is affected by attributes.

I wonder if TimToady or DanS could help us out here.

Alex / talexb / Toronto

"Groklaw is the open-source mentality applied to legal research" ~ Linus Torvalds

Comment on Re^3: How Are Attributes Useful?

Replies are listed 'Best First'.
Re^4: How Are Attributes Useful? by Limbic~Region (Chancellor) on Jan 19, 2005 at 10:40 UTC
talexb, After discovering Attribute::Handlers::Prospective and playing around with it for a while, I did find that you can trigger a piece of code to be run at any phase, to include runtime, as a result of using an attribute. What is still unclear to me is: How this can be accomplished without this module. The documentation on attributes is lacking in my opinion and this module was written by TheDamian using source filters afterall. How triggering a piece of code can make a variable read-only, as you suggested previously, or have any other effect on its behavior. The code only gets triggered once, not each time the variable/sub is accessed So far - it still seems to me to be nothing more than a label that you can attach providing the possibility of other code to react to that label. ...but without either the knowledge of how perl works or the time to delve into the perl code That is the point of the original question. It seems that a lot of people are in the dark. It also seems that there are a lot of assumptions about what is possible without any code backing it up. It seems to me that it shouldn't be very hard for someone that really understands attributes to post a small snippet demonstrating how to use them. Cheers - L~R Update: Added last paragraph moments after hitting submit.	[reply]
Re^5: How Are Attributes Useful? by Anonymous Monk on Oct 03, 2009 at 05:24 UTC
Attribute::Handlers::Prospective accomplishes its magic with Filter::Simple Holy Resurrection, Batman!	[reply]
Re^6: How Are Attributes Useful? by Limbic~Region (Chancellor) on Oct 05, 2009 at 14:17 UTC
Anonymous Monk, I am not sure how this adds to the conversation. I already stated: ... using source filters afterall. I was asking how this could be accomplished without using this module and source filters. Did I miss something in what you were sharing? Cheers - L~R	[reply]


Pathologically Eclectic Rubbish Lister
	PerlMonks

Re^3: How Are Attributes Useful?

This is an archived low-energy page for bots and other anonmyous visitors. Please sign up if you are a human and want to interact.