During the development of the Sub::Lexical module I have come across what I guess could be best described as a limitation of the nature of the module. The problem is that there is no slot in the lexical scratchpad for subroutines so for example the following code dies 
my sub foo;

__output__

"my sub" not yet implemented at - line 1.

[download]
And my &foo is an outright syntax error. So the the lexical subs cannot truly be lexical subs but merely scalar references to CODErefs. But this introduces the problem of namespace issues e.g 
use Sub::Lexical;

my $foo = "a string";
# ack, $foo = sub {}; will run over previous $foo :-/
my sub foo {
    print "I'm in foo()\n";
}

[download]
Currently the workaround is distinctly horrid and involves inserting a double underscore around the variable name so $foo becomes $__foo__. I'm possibly missing some blatently obvious idea or maybe this is an inherent limitation of perl (and with good reason?).
Thanks

_________
broquaint

In reply to Concurrent lexical scopes? by broquaint

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.