Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change
 
PerlMonks  

comment on

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

Confirmed, this is a bug in Class::Field's implementation of fields.pm. 5.8.0's version does it right. I'll look into it, but don't expect anything soon as I've got my hands full working on stuff for 5.8.1.

I will most definately agree that fields.pm is a clumsy interface and would discourage its use in new code. Consider using something a bit more sophisticated. Class::Accessor, Class::Struct, Class::Class, Class::Generate... or whatever the state of the art for class generation and privacy is these days. I could also recommend a few simple tricks.

As for it being deprecated, or going to be thrown away, or in risk of having backwards compatibility problems in future versions of Perl, this is not true. Pseudo-hashes are going away, fields.pm is not. It will continue to work using restricted hashes. As long as you're using fields::new() and treating the resulting object exclusively as a hash you are safe.

Certain bits of fields.pm *are* going away. Anything that obviously exposes the underlying psuedo-hash is gone. That means fields::phash() and any time you assume your object is an array ref. %FIELDS will still be around, but don't trust that either.

On the flip side, using Hash::Util and lock_keys() directly means your code is tied to 5.8.0 and up. If you use fields.pm you can at least be backwards compatible. Hash::Util was not intended to be used directly in programs, it was thrown into 5.8.0 to have *some* user interface to restricted hashes upon which someone could write another more user friendly module around.

If you want to see how this all plays out, try a copy of bleadperl. All of the above has already happened. The current version of Class::Fields also already takes restricted hashes into account.

You can consider this semi-authoritative. I wrote Class::Fields, fixed and then killed pseudo-hashes, ported fields.pm to use restricted hashes in 5.9 and wrote Hash::Util. I have some experience with the subject. ;)


In reply to Re: Bug in 5.8.0 fields/base pragmata? by schwern
in thread Bug in 5.8.0 fields/base pragmata? by talkasab

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



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

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

How do I use this? | Other CB clients
Other Users?
Others examining the Monastery: (4)
As of 2022-05-16 11:57 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    Do you prefer to work remotely?



    Results (63 votes). Check out past polls.

    Notices?