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# AUTOLOAD is used to 
#  1) 'autoload' constants from the constant() function in ABC.xs  
...
    eval "sub $AUTOLOAD { $val }"; # can this be $constname rather tha
+n $AUTOLOAD?
    goto &$AUTOLOAD; # can this just be 'return' if all of the defined
+ names really are constants?
}

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package XYZ::ABC::Scalar;
use XYZ::ABC qw(AUTOLOAD);  
our @ISA = qw(XYZ::ABC);         # are this and the use both needed?
1;