wxruby development - Jul 2011 - [ wxruby-Feature Requests-29306 ] Tweak SWIG to match Ruby's notion of truth

Feature Requests item #29306, was opened at 2011-07-06 14:22
You can respond by visiting: 
http://rubyforge.org/tracker/?func=detail&atid=221&aid=29306&group_id=35

Category: API improvement
Group: User request
Status: Open
Priority: 3
Submitted By: Ryan Hinton (iobass)
Assigned to: Alex Fenton (brokentoy)
Summary: Tweak SWIG to match Ruby''s notion of truth

Initial Comment:
Original email follows, see
<http://rubyforge.org/pipermail/wxruby-users/2011-July/005901.html>.  Alex
Fenton''s follow-up has a brief description of ways to solve the problm.
I favor fiddling with SWIG to translate Ruby return values to C++ booleans in
the expected way.

I''m working on enabling/disabling controls, and I keep getting
exceptions like the following:

mysource.rb:262:in `enable'': Expected argument 1 of type bool, but got
NilClass nil (TypeError)
        in SWIG method ''Enable''
        from mysource.rb:262
        from
C:/Ruby187/lib/ruby/gems/1.8/gems/wxruby-2.0.1-x86-mingw32/lib/wx/classe
s/app.rb:16:in `call''
        from
C:/Ruby187/lib/ruby/gems/1.8/gems/wxruby-2.0.1-x86-mingw32/lib/wx/classe
s/app.rb:16:in `process_event''
        from
C:/Ruby187/lib/ruby/gems/1.8/gems/wxruby-2.0.1-x86-mingw32/lib/wx/classe
s/app.rb:16:in `on_run''
        from
C:/Ruby187/lib/ruby/gems/1.8/gems/wxruby-2.0.1-x86-mingw32/lib/wx/classe
s/app.rb:16:in `main_loop''
        from
C:/Ruby187/lib/ruby/gems/1.8/gems/wxruby-2.0.1-x86-mingw32/lib/wx/classe
s/app.rb:16:in `run''
        from app.rb:188

Is there an (easy) way to help WxRuby follow Ruby''s notion of truth,
i.e. everything but +nil+ and +false+ are true?

The current best workaround I have is 

  enable(... ? true : false)

but that''s clunky, and I obviously keep forgetting to use it.

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