I found the list operator(..) in 32bit perl is very mysterious. Take a look below codes: 
#1:
perl -E"my @aa = 1..20_000_000; my @bb = 1..20_000_000;" #error! out o
+f memory!

#2:
perl -E"my @aa = 1..20_000_000; my @bb = @aa;" #works well
#3:
perl -e"my @cc = 1..40_000_000" #error! out of memory

#4:
perl -E"my @cc; for(my $i = 1; $i<40_000_001; $i++){ push @cc, $i;} pr
+int scalar @cc"  #works well.

#5:
perl -e"push @cc,$_ for 1..40_000_000; print scalar @cc;" works well

[download]
Could anyone tell me how implement range operator in perl source? I can't figure out how example 1 and 4 is broken.
Thanks!!

UPDATE1: add example 5

UPDATE2: choroba perfectly answer my question, thankss



I am trying to improve my English skills, if you see a mistake please feel free to reply or /msg me a correction

In reply to [Resolved] strange list operator by xiaoyafeng

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