Does this sound reasonable?

perlre

Inside the (?{...}) block, $_ refers to the string the regular express
+ion is matching against. You can also use pos() to know what is the c
+urrent position of matching withing this string. 

+ Currently, lexical (my) variables within a (?{...}) block can be
+ problematic, as their use may lead to the unintentional creation of
+ a lexical closure.  For that reason it is usually advisable to
+ use globals in (?{...}) blocks.

The code is properly scoped in the following sense: If the assertion i
+s backtracked (compare "Backtracking"), all changes introduced after 
+localization are undone, so that

[download]

Dave

In reply to Re^4: Inexplicable uninitialized value when using (?{...}) regexp construct. by davido
in thread Inexplicable uninitialized value when using (?{...}) regexp construct. by davido

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