99 lines
2.7 KiB
C++
Executable File
99 lines
2.7 KiB
C++
Executable File
/* boost random/detail/uniform_int_float.hpp header file
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*
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* Copyright Jens Maurer 2000-2001
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* Distributed under the Boost Software License, Version 1.0. (See
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* accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* See http://www.boost.org for most recent version including documentation.
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*
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* $Id: pass_through_engine.hpp 24096 2004-07-27 03:43:34Z dgregor $
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*
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*/
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#ifndef BOOST_RANDOM_DETAIL_PASS_THROUGH_ENGINE_HPP
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#define BOOST_RANDOM_DETAIL_PASS_THROUGH_ENGINE_HPP
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#include <boost/config.hpp>
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#include <boost/random/detail/ptr_helper.hpp>
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namespace boost {
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namespace random {
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namespace detail {
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template<class UniformRandomNumberGenerator>
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class pass_through_engine
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{
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private:
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typedef ptr_helper<UniformRandomNumberGenerator> helper_type;
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public:
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typedef typename helper_type::value_type base_type;
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typedef typename base_type::result_type result_type;
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explicit pass_through_engine(UniformRandomNumberGenerator rng)
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// make argument an rvalue to avoid matching Generator& constructor
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: _rng(static_cast<typename helper_type::rvalue_type>(rng))
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{ }
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result_type min BOOST_PREVENT_MACRO_SUBSTITUTION () const { return (base().min)(); }
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result_type max BOOST_PREVENT_MACRO_SUBSTITUTION () const { return (base().max)(); }
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base_type& base() { return helper_type::ref(_rng); }
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const base_type& base() const { return helper_type::ref(_rng); }
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result_type operator()() { return base()(); }
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private:
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UniformRandomNumberGenerator _rng;
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};
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#ifndef BOOST_NO_STD_LOCALE
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template<class UniformRandomNumberGenerator, class CharT, class Traits>
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std::basic_ostream<CharT,Traits>&
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operator<<(
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std::basic_ostream<CharT,Traits>& os
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, const pass_through_engine<UniformRandomNumberGenerator>& ud
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)
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{
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return os << ud.base();
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}
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template<class UniformRandomNumberGenerator, class CharT, class Traits>
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std::basic_istream<CharT,Traits>&
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operator>>(
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std::basic_istream<CharT,Traits>& is
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, const pass_through_engine<UniformRandomNumberGenerator>& ud
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)
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{
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return is >> ud.base();
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}
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#else // no new streams
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template<class UniformRandomNumberGenerator>
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inline std::ostream&
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operator<<(std::ostream& os,
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const pass_through_engine<UniformRandomNumberGenerator>& ud)
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{
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return os << ud.base();
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}
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template<class UniformRandomNumberGenerator>
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inline std::istream&
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operator>>(std::istream& is,
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const pass_through_engine<UniformRandomNumberGenerator>& ud)
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{
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return is >> ud.base();
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}
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#endif
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} // namespace detail
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} // namespace random
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} // namespace boost
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#endif // BOOST_RANDOM_DETAIL_PASS_THROUGH_ENGINE_HPP
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