#--
#     This file is part of the Prelude library that provides tools to
#     enable Haskell style functional programming in Ruby.
#
#     http://prelude.rubyforge.org 
#     
#     Copyright (C) 2006 APP Design, Inc.
#
#     This program 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.
#
#     This program 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 this program; if not, write to the Free Software Foundation, Inc.,
#     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#++
#
# $Id: prelude.rb 2 2006-08-25 00:11:17Z prelude $

$:.unshift(File.dirname(__FILE__))

require 'prelude/list'
require 'prelude/tuple'
require 'prelude/monad'

module Prelude
  VERSION='0.0.1'
end # Prelude

class Symbol

  # See http://blogs.pragprog.com/cgi-bin/pragdave.cgi/Tech/Ruby/ToProc.rdoc for the detailed discussion
  def to_proc
    proc { |obj, *args| obj.send(self, *args) }
  end

  def curry(one, *args)
    proc { |*args| self.to_proc.call(one, *args) }
  end

end # Symbol

class Proc 

  # See also http://rubyforge.org/projects/rubymurray/ for an
  # elaborate port of Perl's Sub::Curry library
  def curry(one, *args)
    proc{ |*args| self.call(one, *args)}
  end

  # This is will serve as an infix composition operator
  def <<(*args)
    if (1==args.length) && args[0].is_a?(Proc)
      proc {|*a| self.call(args[0].call(*a)) }
    else
      self.call(*args.flatten)
    end
  end

end # Proc