/* boost random/random_number_generator.hpp header file

  *

  * Copyright Jens Maurer 2000-2001

  * Distributed under the Boost Software License, Version 1.0. (See

  * accompanying file LICENSE_1_0.txt or copy at

  * http://www.boost.org/LICENSE_1_0.txt)

  *

  * See http://www.boost.org for most recent version including documentation.

  *

  * $Id: random_number_generator.hpp,v 1.5 2004/11/09 21:22:00 jmaurer Exp $

  *

  * Revision history

  *  2001-02-18  moved to individual header files

  */

 #ifndef BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP

 #define BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP

 #include <boost/config.hpp>

 #include <boost/limits.hpp>

 #include <boost/static_assert.hpp>

 #include <boost/random/uniform_int.hpp>

 #include <boost/random/variate_generator.hpp>

 namespace boost {

 // a model for RandomNumberGenerator std:25.2.11 [lib.alg.random.shuffle]

 template<class UniformRandomNumberGenerator, class IntType = long>

 class random_number_generator

 {

 public:

   typedef UniformRandomNumberGenerator base_type;

   typedef IntType argument_type;

   typedef IntType result_type;

   random_number_generator(base_type& rng) : _rng(rng)

   { 

 #ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS

     BOOST_STATIC_ASSERT(std::numeric_limits<result_type>::is_integer);

 #endif

   }

   // compiler-generated copy ctor is fine

   // assignment is disallowed because there is a reference member

   result_type operator()(argument_type n)

   {

     typedef uniform_int<IntType> dist_type;

     return variate_generator<base_type&, dist_type>(_rng, dist_type(0, n-1))();

   }

 private:

   base_type& _rng;

 };

 } // namespace boost

 #endif // BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP