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create a CODE ref from a parse tree?

by perl5ever (Pilgrim)
on Sep 08, 2012 at 16:21 UTC ( #992502=perlquestion: print w/replies, xml ) Need Help??
perl5ever has asked for the wisdom of the Perl Monks concerning the following question:

It is possible to create a CODE ref that is based on the _parse tree_ of another CODE ref?

Normally we create CODE refs by specifying the source code for the subroutine.

I would like to create a perl function which takes a CODE ref as input, accesses the parse tree of the CODE ref and creates a new sub by specifying what the new sub's parse tree should be. Also, the new parse tree could contain elements from the first sub's parse tree.

Is this possible?

SO link:

Replies are listed 'Best First'.
Re: create a CODE ref from a parse tree?
by Corion (Pope) on Sep 08, 2012 at 16:43 UTC
    If you want to customize a subroutine behaviour, pass it a callback (a subroutine reference). Perl has no macro expansion.
Re: create a CODE ref from a parse tree?
by ig (Vicar) on Sep 08, 2012 at 19:45 UTC
Re: create a CODE ref from a parse tree?
by chromatic (Archbishop) on Sep 08, 2012 at 17:12 UTC

    What do you mean by parse tree?

      That's a good question. I guess I would want whatever perl uses for the internal representation of the CODE ref.

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