accessor_gotcha.rb

# Updated: This works for every "setter method". I've been using the ivars this whole time (4 YEARS!)
# so I never noticed. But it seems dirty to access ivars you didn't create...

module AccessorDefinition
  attr_accessor :foo
end

class Includer
  include AccessorDefinition
  
  def foo_is_bar
    foo = :bar
  end
end

p "## Accessors with Explicit Receivers ##"
obj = Includer.new
p "obj.foo = :bar"
obj.foo = :bar
p "result: #{obj.foo.inspect}"
# => "result: :bar"

p "## Accessors with Implicit Receivers"
obj = Includer.new
p "foo = :bar (in method body)"
obj.foo_is_bar
p "result: #{obj.foo.inspect}"
# => "result: nil"