Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

Assigning a string is actually quite complex when dealing with scalars.

  1. Call GET magic on the scalar being assigned if any.
  2. Check what the scalar being assigned contains (which happens to be a string).
  3. Upgrade the scalar to which we are assigning to one that can contain a string if needed.
  4. Clear whatever value the scalar to which we are assigning contains. (This can require reducing reference counts (which can require calling destructors, etc), reducing COW counts, resetting OOB vars, etc.)
  5. Finally, we can start the copy. That can happen one of three ways. Hopefully, it's just a question of copying a pointer and incrementing the COW reference count.

(I definitely skipped some steps. I got tired of typing.)

Walking the optree, on the other hand, is simply following a linked list. (Effectively, op = op->next.) This is way simpler than assigning a string.

In reply to Re^2: Why not perl have raw/native type by ikegami
in thread Why not perl have raw/native type by xiaoyafeng

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, 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, 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.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others pondering the Monastery: (5)
    As of 2020-11-30 20:03 GMT
    Find Nodes?
      Voting Booth?

      No recent polls found