Re^2: Behaviour on recursive use

Fair enough. Thank you for leading me in the way.

So, according to the imports order, the compiler will or won't load the different variables/subs in the right order, so that in my example, we have :

========= OK test :
load A1
-> load A2
-> load C (but constant TYPE is not loaded already)
-> not load A2 (already 'used')
-> load constant TYPE
========= KO test :
load A1
-> load C (but constant TYPE is not loaded already)
-> load A2
-> not load C (already 'used')
-> fail because constant TYPE is not loaded
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Is that right?

Ok. What about the "C->TYPE" vs "C::TYPE", the first being the one that always works whatever the 'use' order. Is that a "runtime" vs "compile time", as you pointed out?

Cheers.

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Re^3: Behaviour on recursive use by Anonymous Monk on Mar 10, 2014 at 10:57 UTC
Ok. What about the "C->TYPE" vs "C::TYPE", the first being the one that always works whatever the 'use' order. Is that a "runtime" vs "compile time", as you pointed out? C->TYPE is method call (like "C"->TYPE or "C::"->TYPE or C::->TYPE ) and C::TYPE is a bareword C::TYPE can be a function call or it can be a namespace , perl doesn't know ahead of time what it is Once the constant C::TYPE is defined (constants are functions ) perl knows that C::TYPE is a function, so the code becomes C::TYPE()->... and not "C::TYPE"->... If you write C::TYPE()->... perl knows ahead of time, before the TYPE constant is actually defined to treat it as a function call This is talked about in perlobj and maybe even Modern Perl , so see those for more of these detail Bottom line, lots of experts think having two modules use each other is mistake -- they should both use a third module -- you're not alone in trying this :) Circular module dependencies, Circular usage is poor design if you can't figure it out yourself, that is a giant hint that you should break the circle Also, complex constants like these are, well, overrated in practice :) Maybe see also Simple Module Tutorial and begincheck.pl and Circular use doesn't call import() as expected...? Cheers, I'm just some nightowl	[reply]
Re^4: Behaviour on recursive use by locinus33 (Initiate) on Mar 10, 2014 at 15:47 UTC
Well, thanks for those explanations! it makes it all clearer about Perl's interpretation. Yeah, I know for the circular dependencies, I have to work on it. Thanks !	[reply]