From: Craig Moran <craig.m.moran.ruby@...>
Date: 2005-07-12T04:25:52+09:00
Subject: Re: Standard Library Warnings

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Apologies for the blank messages. Google's HTML email freaked out on me and=
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sent these by mistake. Sorry again for the blank "noise."
Craig

On 7/11/05, Craig Moran <craig.m.moran.ruby@gmail.com> wrote:
>=20
> On 7/11/05, James Edward Gray II <james@grayproductions.net> wrote:
> > I keep running into some warning message from standard libraries. I
> > always use warnings so they are driving me crazy.
> >
> > With the latest release of HighLine, I actually had to build a work-
> > around that captures, disables, and later resets the warning level
> > when calling into readline, because it's my opinion that the warning
> > breaks auto-completion (the warning appears in the middle of your
> > completed word).
> >
> > Given that, I thought I would post some warning firing examples in
> > the attempt to get some Ruby core hacker to feel sorry for me and
> > apply a patch or two. I looked at patching set.rb myself but it
> > seems that there is a hack in there to work around this warning and I
> > couldn't figure out why it doesn't work.
> >
> > Here are my examples:
> >
> > $ ruby -v
> > ruby 1.8.2 (2004-12-25) [powerpc-darwin7.7.0]
> > $ cat set_example.rb
> > require "set"
> >
> > SortedSet.new
> > $ ruby -w set_example.rb
> > (eval):2: warning: method redefined; discarding old initialize
> > $ cat prog_ruby_example_723.rb
> > # Sample code from Programing Ruby, page 723
> > require 'readline'
> > include Readline
> >
> > require 'abbrev'
> >
> > COMMANDS =3D %w{ exit inc dec }
> >
> > ABBREV =3D COMMANDS.abbrev
> >
> > Readline.completion_proc =3D proc do |string|
> > ABBREV[string]
> > end
> >
> > value =3D 0
> >
> > loop do
> >
> > cmd =3D readline("wibble [#{value}]: ", true)
> >
> > break if cmd.nil?
> >
> > case cmd.strip
> > when "exit"
> > break
> > when "inc"
> > value +=3D 1
> > when "dec"
> > value -=3D 1
> > else
> > puts "Invalid command #{cmd}"
> > end
> >
> > end
> > $ ruby -w prog_ruby_example_723.rb
> > wibble [0]: dprog_ruby_example_723.rb:19: warning: instance variable
> > completion_case_fold not initialized
> > ec
> >
> > In that last example, I pushed d then tab to trigger the warning.
> >
> > Let me know if I can answer any questions and thanks in advance for
> > taking pity on a warnings-allergic coder.
> >
> > James Edward Gray II
> >
> >
> >
>=20
>

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