C:\>perl -MO=Deparse -e "print 'this' if $x"
print 'this' if $x;
-e syntax OK

##</code><code>##

C:\>perl -MO=Deparse -e "print 'this' if 0"
'???';
-e syntax OK

##</code><code>##

D:\>perl -MO=Deparse -e "sub MY_CONST(){'bla-bla'};$a=MY_CONST;print MY_CONST;"
sub MY_CONST () {
    'bla-bla';
}
$a = 'bla-bla';
print 'bla-bla';
-e syntax OK

##</code><code>##

D:\>perl -MO=Deparse -e "sub MY_CONST{'bla-bla'};$a=MY_CONST;print MY_CONST;"
sub MY_CONST {
    'bla-bla';
}
$a = MY_CONST();
print MY_CONST();
-e syntax OK

##</code><code>##

C:\>perl -MO=Deparse -we "sub DEBUG{0}print 'this' if DEBUG;"
sub DEBUG {
    0;
}
print 'this' if DEBUG ;
-e syntax OK

C:\>perl -MO=Deparse -we "sub DEBUG(){0}print 'this' if DEBUG;"
sub DEBUG () {
    0;
}
'???';
-e syntax OK