Contents

#--
# =============================================================================== 
# Copyright (c) 2005, 2006 Christopher Kleckner
# All rights reserved
#
# This file is part of the Rio library for ruby.
#
# Rio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# Rio is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Rio; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
# =============================================================================== 
#++
#
# To create the documentation for Rio run the command
#  ruby build_doc.rb
# from the distribution directory. Then point your browser at the 'doc/rdoc' directory.
#
# Suggested Reading
# * RIO::Doc::SYNOPSIS
# * RIO::Doc::INTRO
# * RIO::Doc::HOWTO
# * RIO::Rio
#
# <b>Rio is pre-alpha software. 
# The documented interface and behavior is subject to change without notice.</b>


class AbstractMethodCalled < ::TypeError #:nodoc: all
end

class Module #:nodoc: all
  # abstract_method(symbol, ...)
  # extends Module
  # defines a method which raises AbstractMethodCalled
  # used in a base class to ensure that subclasses define an implementation
  #    thus making the base class abstract
  def abstract_method(*syms)
    for symbol in syms
      module_eval <<-"end_eval"
	def #{symbol.id2name}(*args)
          raise AbstractMethodCalled
	end
      end_eval
    end
  end
        
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
rio-0.3.8	lib/rio/abstract_method.rb