Actually, it looks to me like Hook::LexWrap might already do exactly what I want (which, of course, doesn't preclude my studying its evil ways source). The documentation is a little sparse about the scope in which the wrappers are executed, but the examples make it look like I might just pass my 
sub {
    BLAH
}

[download]
as a pre-wrapper to get the desired effect. Thanks so much!

UPDATE: I've had a look at the source, and it seems that most of Hook::LexWrap's magic consists in fooling caller and installing subs in-place (a la memoize), not doing anything with lexical scope. My thoughts should probably have leapt immediately to PadWalker, though I'm not familiar enough with it to know if it'll do what I want. Binding is so so close, but it allows one to peek at bindings “the wrong way” for what I need.

In reply to Re^2: Modifying subroutines and un-eval-ing by JadeNB
in thread Modifying subroutines and un-eval-ing by JadeNB

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.