source: NonGTP/Boost/boost/random/random_number_generator.hpp @ 857

Revision 857, 1.7 KB checked in by igarcia, 19 years ago (diff)
Line 
1/* boost random/random_number_generator.hpp header file
2 *
3 * Copyright Jens Maurer 2000-2001
4 * Distributed under the Boost Software License, Version 1.0. (See
5 * accompanying file LICENSE_1_0.txt or copy at
6 * http://www.boost.org/LICENSE_1_0.txt)
7 *
8 * See http://www.boost.org for most recent version including documentation.
9 *
10 * $Id: random_number_generator.hpp,v 1.5 2004/11/09 21:22:00 jmaurer Exp $
11 *
12 * Revision history
13 *  2001-02-18  moved to individual header files
14 */
15
16#ifndef BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP
17#define BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP
18
19#include <boost/config.hpp>
20#include <boost/limits.hpp>
21#include <boost/static_assert.hpp>
22#include <boost/random/uniform_int.hpp>
23#include <boost/random/variate_generator.hpp>
24
25namespace boost {
26
27// a model for RandomNumberGenerator std:25.2.11 [lib.alg.random.shuffle]
28template<class UniformRandomNumberGenerator, class IntType = long>
29class random_number_generator
30{
31public:
32  typedef UniformRandomNumberGenerator base_type;
33  typedef IntType argument_type;
34  typedef IntType result_type;
35  random_number_generator(base_type& rng) : _rng(rng)
36  {
37#ifndef BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
38    BOOST_STATIC_ASSERT(std::numeric_limits<result_type>::is_integer);
39#endif
40  }
41  // compiler-generated copy ctor is fine
42  // assignment is disallowed because there is a reference member
43
44  result_type operator()(argument_type n)
45  {
46    typedef uniform_int<IntType> dist_type;
47    return variate_generator<base_type&, dist_type>(_rng, dist_type(0, n-1))();
48  }
49
50private:
51  base_type& _rng;
52};
53
54} // namespace boost
55
56#endif // BOOST_RANDOM_RANDOM_NUMBER_GENERATOR_HPP
Note: See TracBrowser for help on using the repository browser.