See Regexp::Exhaustive. Following up on SuicideJunkie's example, with overlaps:
use Regexp::Exhaustive qw(exhaustive);
use Data::Dumper;

my $str = "A dun A dun B overlapped B something A again B";
print Dumper [ exhaustive($str => qr/A (.*?) B/) ];


__END__
$VAR1 = [
  "dun A dun",
  "dun A dun B overlapped",
  "dun A dun B overlapped B something A again",
  "dun",
  "dun B overlapped",
  "dun B overlapped B something A again",
  "again"
];

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In reply to Re: Grab "as many occurrences as there are" in a long string by repellent
in thread Grab "as many occurrences as there are" in a long string by locked_user sundialsvc4

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