Here's a slightly more direct implementation of that:
use strict;
$|++;
my $generator = do {
my $num = 1;
sub { ++$num }
};
while (1) {
my $prime = $generator->();
print "$prime\n";
## don't let any multiple of these escape:
my $oldgenerator = $generator;
$generator = sub {
{
my $next_prime = $oldgenerator->();
redo if $next_prime % $prime == 0;
return $next_prime;
}
};
}
-- Randal L. Schwartz, Perl hacker
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