Hi
I'm heavily struggling to find a reliable way to determine if a routine was called from the same or another position in the code.
Esoteric? Not really.
Take the example of an iterator iter(1,10) to replace foreach with while
for $x (1..10) { for $y (1..10) { print "$x$y" }}
while (my $x=iter(1,10)) { while (my $y=iter(1,10)) { print "$x$y" }}
- checking caller doesnt help because you only get the codeline
- checking the reference of the constant parameter is not reliable (see Reference of constants and literals)
- writing iter 1,10 => my $x and checking $x doesn't help, because $x is reallocated everytime by my.
Otherwise you have to type for (my $x; iter 1,10 => $x;) {}
The normal way to produce an iterator is to call a generator which supplies a coderef to the iterator. But I'd like to integrate both steps in one simple sub call...
Any idea???
UPDATES: corrected missing ( in pseudocode. thx GrandFather
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