boost/random/random_number_generator.hpp
/* boost random/random_number_generator.hpp header file * * Copyright Jens Maurer 2000-2001 * Permission to use, copy, modify, sell, and distribute this software * is hereby granted without fee provided that the above copyright notice * appears in all copies and that both that copyright notice and this * permission notice appear in supporting documentation, * * Jens Maurer makes no representations about the suitability of this * software for any purpose. It is provided "as is" without express or * implied warranty. * * See http://www.boost.org for most recent version including documentation. * * $Id: random_number_generator.hpp,v 1.3 2003/07/06 21:53:42 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