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local $_ = 'foo'; say 'Start' if /\G foo/gcx; say 'Mid' if /\G .*/gcx; say 'End' if /\G \z/gcx;
Start Mid
say 'Mid' if /\G .+/gcx;
Start Mid End
perl -E 'local $_ = "foo\n"; say "Start" if /\G foo/gcx; say "Mid" if +/\G .*/gcx; say "End" if /\G (?=\n)/gcx'