If a sub doesn't close over any lexicals, than I bet that refs to it will be constant. If subs close over lexicals (or represent different code), than the refs can't be constant unless the refs have non-overlapping lifespans. 

  DB> sub test(&) { my( $c ) = @_; print 0+$c,$/; return $c }
  DB> ;{ my($a,$b); test {$a}; test {$b} }
14808916
14808916
  DB> ;{ my($a,$b); my $c = test {$a}; test {$b} }
15512116
15512804
  DB> ;{ my @a; for(1..3){ my $a; push @a, test {$a} } }
15513028
15511044
15513252

[download]

- tye        

In reply to Re: References for ano subs fixed at compile time? (sorta) by tye
in thread References for ano subs fixed at compile time? by LanX

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