Re^3: Map Function Weirdness

[ikegami]

Keep in mind that Deparse is not precise. It's a useful tool, but don't rely on it too deeply. For example, this is wrong.

>perl -MO=Deparse,-x9 -e"if(my $x=$a<$b){$a;}"
my $x = $a < $b and do {
    $a
};
-e syntax OK

The $x is scoped to the if. Or is it...

My code is an approximation too. The if is equivalent to neither

do { ( $a < $b ) and do { $a } };

nor

( $a < $b ) and do { $a };

The my is lexically scoped at compile-time (as shown in mine), but it's not lexically scoped at run-time (as shown by Concise and Deparse). This means the objects can live a little longer than expected.

...
{
   ...
   if (my $obj = ...) {
      ...
   }
   .
   .  # $obj still exists here "anonymously".
   .
} # $obj cleared here, so destructor only called here.
...