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{-# LANGUAGE ScopedTypeVariables #-}
module SaberYGanar where
-- un programa presentado por Alejandro Serrano

import Control.Monad.Random
-- import Control.Monad.Random.Class

-- Posibles operaciones del juego
data Operacion = Mas Int
               | Menos Int

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require 'formula'

class Purrs < Formula
  homepage ''
  url "cvs://:pserver:[email protected]:/cvs/purrs:purrs", :using => :cvs
  version '0.0.3'

  depends_on :x11
  depends_on 'automake'
  depends_on 'autoconf'

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Preparing the environment

To install everything in an automated fashion, we will use Homebrew, which is a package manager for Mac OS X:

• Go to Apple Developers Page (you may need to register),
• Download the XCode Command Line Tools and XQuartz and install them,
• Open a terminal,
• Execute ruby <(curl -fsSkL raw.github.com/mxcl/homebrew/go).

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require 'formula'

# NOTE: GCC 4.6.0 adds the gccgo compiler for the Go language. However,
# gccgo "is currently known to work on GNU/Linux and RTEMS. Solaris support
# is in progress. It may or may not work on other platforms."

class Gcc47 < Formula
  homepage 'http://gcc.gnu.org'
  url 'http://ftpmirror.gnu.org/gcc/gcc-4.7.2/gcc-4.7.2.tar.bz2'
  mirror 'http://ftp.gnu.org/gnu/gcc/gcc-4.7.2/gcc-4.7.2.tar.bz2'

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require 'formula'

class Ppl < Formula
  homepage 'http://bugseng.com/products/ppl/'
  url 'http://bugseng.com/products/ppl/download/ftp/releases/1.0/ppl-1.0.tar.gz'
  sha1 '5f543206cc9de17d48ff797e977547b61b40ab2c'

  depends_on 'gmp'

  def install

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require 'formula'

class Libmpc < Formula
  homepage 'http://multiprecision.org'
  url 'http://multiprecision.org/mpc/download/mpc-1.0.1.tar.gz'
  sha1 '8c7e19ad0dd9b3b5cc652273403423d6cf0c5edf'

  bottle do
    cellar :any
    sha1 'c8bbad14fa8314418e07aa7a5cd824452fa6ea1e' => :mountain_lion

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require 'formula'

class Mpfr < Formula
  homepage 'http://www.mpfr.org/'
  # Upstream is down a lot, so use the GNU mirror + Gist for patches
  url 'http://ftpmirror.gnu.org/mpfr/mpfr-3.1.2.tar.bz2'
  mirror 'http://ftp.gnu.org/gnu/mpfr/mpfr-3.1.2.tar.bz2'
  sha1 '46d5a11a59a4e31f74f73dd70c5d57a59de2d0b4'

  bottle do

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require 'formula'

class Gmp < Formula
  homepage 'http://gmplib.org/'
  url 'ftp://ftp.gmplib.org/pub/gmp-5.1.1/gmp-5.1.1.tar.bz2'
  mirror 'http://ftp.gnu.org/gnu/gmp/gmp-5.1.1.tar.bz2'
  sha1 '21d037f7fb32ae305a2e4157cff0c8caab06fe84'

  bottle do
    cellar :any

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{-# LANGUAGE TypeFamilies, DataKinds, GADTs #-}

-- Wrap the doll one level.
matryoshka :: a -> [a]
matryoshka x = [x]

-- The type of unary natural numbers.
-- With the help of 'DataKinds' extension, we get a corresponding
-- 'Nat' type which we can use to index the 'NestedList' type.
data Nat = Zero | Succ Nat

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type family All (c :: k -> Constraint) (t :: [k]) :: Constraint where
  All c '[]       = ()
  All c (x ': xs) = (c x, All c xs)