Warning: redefine instance

ruby-talk
1

Does anyone know why I am getting this warning?

$ ruby -v
ruby 1.8.0 (2003-04-11) [i686-linux]
$ cat atest.rb
require ‘singleton’

class X
include Singleton
end

X.instance
$ ruby -w atest.rb
/usr/local/lib/ruby/1.8/singleton.rb:145: warning: redefine instance
$

Thanks
± S.D.Sykes - www.stephensykes.com -
ruby -e ‘_=2;"||25~!A59(1A~47!K~#-6<.A~".scan(/./){
putc$&>$`?$/:+=$&[0]-?4}’

2

jbshaldane@hotmail.com (haldane) wrote in message news:7762c743.0304172306.1c4374b8@posting.google.com…

Does anyone know why I am getting this warning?

$ ruby -v
ruby 1.8.0 (2003-04-11) [i686-linux]
$ cat atest.rb
require ‘singleton’

class X
include Singleton
end

X.instance
$ ruby -w atest.rb
/usr/local/lib/ruby/1.8/singleton.rb:145: warning: redefine instance
$

Just to clarify my question a little, the warning comes from this line
in singleton.rb (just after the instance has been created):

def self.instance() @instance end

Is there any reason it could not be replaced with

define_method(:instance, proc { @instance })

which does not result in the warning?

Thanks
± S.D.Sykes - www.stephensykes.com -
ruby -e ‘_=2;"||25~!A59(1A~47!K~#-6<.A~".scan(/./){
putc$&>$`?$/:+=$&[0]-?4}’

3

Hi,

···

In message “Re: Warning: redefine instance” on 03/04/21, haldane jbshaldane@hotmail.com writes:

Just to clarify my question a little, the warning comes from this line
in singleton.rb (just after the instance has been created):

def self.instance() @instance end

Is there any reason it could not be replaced with

define_method(:instance, proc { @instance })

which does not result in the warning?

Nice idea, thank you.

						matz.
4

Hi Matz,

Just to clarify my question a little, the warning comes from this line
in singleton.rb (just after the instance has been created):

def self.instance() @instance end

Is there any reason it could not be replaced with

define_method(:instance, proc { @instance })

which does not result in the warning?

Nice idea, thank you.

I noticed you changed singleton.rb, but you only changed the code on
line 159 - I think you also need to change line 145 to match.

Regards
± S.D.Sykes - www.stephensykes.com -

···

“This may seem a bit weird, but that’s okay, because it
is weird.” – Programming Perl on variable name prefixes

5

Hi,

···

In message “Re: Warning: redefine instance” on 03/04/23, haldane jbshaldane@hotmail.com writes:

I noticed you changed singleton.rb, but you only changed the code on
line 159 - I think you also need to change line 145 to match.

Thank you.

						matz.