Say I have an object, $heap. And say I want to store some really whopping huge strings in this heap. But $heap was not written to know about aliases and I don't want to add the overhead of putting references into the heap and telling it to use a dereferencing comparison function.

Is there much chance that I could use: 

alias $heap->Push( $dna );

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to acheive a heap of aliases? My understanding of your description says "no". Would it make sense to be able to copy an opcode tree and transform the copy like: 

my $heapPush= aliasize $heap->can("Push");
$heapPush->( $heap, $dna );

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(noting that routines called by $heapPush would still remain unaffected, perhaps unfortunately)

How would you go about retrofitting a module to support storing aliases instead of copies?

On a related note, compare these two bits of code: 

my @x;

sub swap {
    my( $i, $j )= @_;
    alias @x[$i,$j]= @x[$j,$i];
}

sub exchange {
    my( $i, $j )= @_;
    alias do {
        my $t= $x[$i];
        $x[$i]= $x[$j];
        $x[$j]= $t;
    };
}

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Do these cases work? 

swap( 0, 1 );
exchange( 0, 1 );
swap( 0, 0 );

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I expect I could work that out for myself but I don't want to expend the effort and I thought you might appreciate the opportunity. (:

BTW, smashing great idea for a module.

- tye        

In reply to Re: RFC: Is there more to alias? (cases) by tye
in thread RFC: Is there more to alias? by xmath

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