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support C++14 constexpr: random distributions

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This commit is contained in:
bolero-MURAKAMI 2013-11-05 23:46:23 +09:00
parent 230630b45b
commit 3c4a465d35
9 changed files with 468 additions and 60 deletions
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14
sprout/random/geometric_distribution.hpp
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@ -129,9 +129,23 @@ namespace sprout {
log_1mp_ = init_log_1mp(p_);
}
template<typename Engine>
SPROUT_CXX14_CONSTEXPR result_type operator()(Engine& eng) const {
return static_cast<result_type>(
sprout::math::floor(sprout::math::log(RealType(1) - static_cast<RealType>(sprout::random::uniform_01<RealType>()(eng))) / log_1mp_)
);
}
template<typename Engine>
SPROUT_CONSTEXPR sprout::random::random_result<Engine, geometric_distribution> const operator()(Engine const& eng) const {
return generate(eng);
}
template<typename Engine>
SPROUT_CXX14_CONSTEXPR result_type operator()(Engine& eng, param_type const& parm) const {
return geometric_distribution(parm)(eng);
}
template<typename Engine>
SPROUT_CONSTEXPR sprout::random::random_result<Engine, geometric_distribution> const operator()(Engine const& eng, param_type const& parm) const {
return geometric_distribution(parm)(eng);
}
template<typename Elem, typename Traits>
friend SPROUT_NON_CONSTEXPR std::basic_istream<Elem, Traits>& operator>>(
std::basic_istream<Elem, Traits>& lhs,