G'day JockoHelios,

"I'm wondering how far, or how deep, this can go without causing Perl to upchuck."

The default recursion depth for subroutines is 100. You can change this by compiling perl with -DPERL_SUB_DEPTH_WARN=n. This was introduced in 5.10.1 (see perl5101delta). You can temporarily ignore the limit with "no warnings 'recursion';" (see perldiag). Searching for "PERL_SUB_DEPTH_WARN" in both of those documents would be the quickest way to locate the relevant information.

"example: in the subroutine SRE_SubRoutineExample, all named variables and arrays start with SRE_ - thus, my $SRE_CompString = "JAPH";"

my variables declared within a subroutine are lexically scoped to that subroutine. You can have a $CompString in every subroutine you write and they will all be different variables. I think you'll probably be creating a rod for your back if you start trying to assign unique prefixes to every variable you declare in every subroutine. It's your back, though :-)

-- Ken

In reply to Re: useful depth of sub routines by kcott
in thread useful depth of sub routines by JockoHelios

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.