From: Caleb Clausen <vikkous@...>
Date: 2009-12-20T04:57:35+09:00
Subject: Re: Suggestion of Array#=== which improves case/when behavio

On 12/19/09, Rick DeNatale <rick.denatale@gmail.com> wrote:
> I've been amazed by how subtly disruptive, seemingly simple changes
> like the result of Array#to_s between Ruby 1.8 and 1.9 can be
> http://talklikeaduck.denhaven2.com/2009/10/27/its-the-little-things

I added this to my tests for 1.9 porting. It at least makes the
Array#to_s problems readily apparent. Not intended as a permanent
measure.

if defined? ::RUBY_VERSION and ::RUBY_VERSION[/^\d+.\d+/].to_f>=1.9
  class ::Array
    alias to_s_without_semantics_changed_warning to_s

    def to_s
      warn "calling Array#to_s from #{caller.first}; semantics have changed"
      to_s_without_semantics_changed_warning
    end
  end
end