use strict;
use warnings;

my $a = 1;
my $b = 0;
my $c = $a and $b;
print "c=$c\n";

[download]
This gives me warning that "Useless use of private variable in void context at tmp16.pl line 6.". line 6 is "my $c = $a and $b;". I first tried -MO=Deparse. 
C:\temp>perl -MO=Deparse tmp16.pl
Useless use of private variable in void context at tmp16.pl line 6.
use warnings;
use strict 'refs';
my $a = 1;
my $b = 0;
$b if my $c = $a;
print "c=$c\n";
$a = 1;
$b = 0;
$c = $a && $b;
print "c=$c\n";
tmp16.pl syntax OK

[download]
So, Deparse maybe says $b of "$b if my $c = $a;" is the useless use of private variable.
regards.

In reply to Re^2: strange boolean algebra behaviour by remiah
in thread strange boolean algebra behaviour by vlad_tepesch

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