As mentioned in your referenced node on "How do I get a reference to a builtin function?", you cant.

Here are alternatives:

Wrap the function: 

>perl -e "my %f=(chr=>sub{chr(shift)});  print $f{$ARGV[0]}->($ARGV[1]
+)" chr 35
#
>perl -e "my %f=(chr=>sub{chr(shift)});  print $f{$ARGV[0]}->($ARGV[1]
+)" chr 36
$

[download]
Use eval (more general, but potentially unsafe): 
>perl -e "print eval qq|@ARGV|" sqrt 2
1.4142135623731
>perl -e "print eval qq|@ARGV|" chr 128
Ç

[download]

            "XML is like violence: if it doesn't solve your problem, use more."

In reply to Re: Builtin function and reference by NetWallah
in thread Builtin function and reference by pid

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