# Sometimes :symbol.operator looks nice.
# I generally hate "global variables programming",
# but this extension seems to be safe and handy.
def experimental_by_oleganza
  # arrays for OR, hashes for AND with in-Symbol operators
  all([{:name => ["john", "jane"]}, {:age.gr => 3, :age.lt => 65}])

  # same as above, but with optional :any, :all keys (:any for OR, :all for AND)
  all([{:name => ["john", "jane"]}, {:any => [{:age.gt => 3}, {:parental_control.not => :nil}], :age.lt => 65}])

  # minimalistic hashes with :all, :any quantors
  all(:any => {
                :name => ["john", "jane"],
                :all  => {
                           :any      => {
                                          :age.gt => 3,
                                          :parental_control.not => :nil
                                        },
                           :age.lt   => 65
                         }
              }
     )

  # ParseTree/RubyToRuby version
  all { |p|
    ["john", "jane"].include?(p.name) or
    (
      (p.age > 3 or p.parental_control != nil) and
      p.age < 65
    )
  }

  # Maybe we should adopt every flavor to be detected automatically.
  # Also, it is a good idea to construct proc's from the AST for in-memory operations

end