pipe_mixin.rb

module PipeMixin
  def >>(proc_or_method, *)
    case proc_or_method
    when Proc, Method, UnboundMethod
      proc_or_method.call(self)
    else
      super
    end
  end
end

class Object
  include PipeMixin
end

class UnboundMethod
  def call(receiver, *args, &block)
    bind(receiver).call(*args, &block)
  end
end

class Symbol
  def call(*args, &block)
    proc { |receiver| receiver.send(self, *args, &block) }
  end
end

__END__

repl> :abc >> :to_s.() >> :split.(//) >> :join.('_') >> :sub.(/_(.)/, &:upcase) >> :to_sym.()
=> :a_B_c