Class::Accessor Problem

PerlingTheUK has asked for the wisdom of the Perl Monks concerning the following question:

Dear Monks,
as a self written base class I use for all my objects is growing steadily, I try to focus it a bit more on my specific demands and outsource more common functionality. One of these features is provided by Class::Accessor. Reading the documentation I cannot see where this is difficult to use or where I might make any errors but the following code:

BEGIN{
  ...
  use Class::Accessor;
  our ( $VERSION, $LAST_ERROR, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS
+ );
  @ISA         = qw( Class::Accessor );
  ...
  Variant->mk_accessor( qw(name nodes) );
}
[download]

exits on compilation with the following message:

Can't locate object method "mk_accessor" via package "Variant" at Vari
+ant.pm line 31.
[download]

I wonder if someone with some experience using this class can spot the error as I have spent almost a day on this yet no proper clue what is going wrong.

Cheers,
PerlingTheUK

Comment on Class::Accessor Problem Select or Download Code

Replies are listed 'Best First'.
Re: Class::Accessor Problem by Ovid (Cardinal) on Nov 27, 2005 at 16:53 UTC
The method is named `mk_accessors`. You forgot the "s" on the end. Cheers, Ovid New address of my CGI Course.	[reply]
Re^2: Class::Accessor Problem by PerlingTheUK (Hermit) on Nov 27, 2005 at 17:03 UTC
OUCH, Thanks :( Cheers, PerlingTheUK	[reply]
Re: Class::Accessor Problem by BrowserUk (Patriarch) on Nov 27, 2005 at 16:09 UTC
Comment out the BEGIN{} block. Update: I re-phrase that. Try taking the failing code out of the BEGIN() block. Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal? "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice.	[reply] [d/l]
Re^2: Class::Accessor Problem by PerlingTheUK (Hermit) on Nov 27, 2005 at 16:52 UTC
BrowserUK, Thanks, but it does not work I tried to remove the line from the BEGIN block and I also completely removed the block. Either option did not make a difference to the error message. The actual benchmark script coming with this package is running fine in my environment and I cannot spot my error. The current code - which still produces the above quoted error is: `package Variant; use strict; use warnings; use Exporter; use Class::Accessor; our ( @EXPORT, @EXPORT_OK, %EXPORT_TAGS ); @EXPORT = qw(); %EXPORT_TAGS= (); @EXPORT_OK = qw(); use base ( qw(Exporter Class::Accessor) ); our ( $VERSION, $LAST_ERROR ); __PACKAGE__->mk_accessor( qw(name nodes) );` [download] I have noticed, that the benchmark example as well as the examples in the documentation use either a base class with all fields defined or Class::Fields as base class. I intend - and only then does using Class:Accessor make sense to me to include it in a base class that does not yet know which fields are in my derived classes. Are there any issues with this setup? Do I need to define the fields of my class before calling `mk_accessor( @fieldnames )` Cheers, PerlingTheUK	[reply] [d/l] [select]


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