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add normal_distribution::stddev

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bolero-MURAKAMI 2012-11-16 13:40:19 +09:00
parent 225c11b505
commit f37e8a9088
19 changed files with 261 additions and 211 deletions
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15
sprout/random/inversive_congruential.hpp
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@ -26,13 +26,14 @@ namespace sprout {
SPROUT_STATIC_CONSTEXPR IntType increment = b;
SPROUT_STATIC_CONSTEXPR IntType modulus = p;
SPROUT_STATIC_CONSTEXPR IntType default_seed = 1;
private:
static SPROUT_CONSTEXPR result_type static_min() {
public:
static SPROUT_CONSTEXPR result_type static_min() SPROUT_NOEXCEPT {
return b == 0 ? 1 : 0;
}
static SPROUT_CONSTEXPR result_type static_max() {
static SPROUT_CONSTEXPR result_type static_max() SPROUT_NOEXCEPT {
return modulus - 1;
}
private:
template<typename T>
static SPROUT_CONSTEXPR typename std::enable_if<!(b == 0) && std::is_unsigned<T>::value, bool>::type
arg_check_nothrow(T const& x0) {
@ -80,20 +81,20 @@ namespace sprout {
explicit SPROUT_CONSTEXPR inversive_congruential_engine(IntType const& x0)
: x_(init_seed(x0))
{}
SPROUT_CONSTEXPR result_type min() const {
SPROUT_CONSTEXPR result_type min() const SPROUT_NOEXCEPT {
return static_min();
}
SPROUT_CONSTEXPR result_type max() const {
SPROUT_CONSTEXPR result_type max() const SPROUT_NOEXCEPT {
return static_max();
}
SPROUT_CONSTEXPR sprout::random::random_result<inversive_congruential_engine> operator()() const {
typedef sprout::random::detail::const_mod<IntType, p> do_mod;
return generate(do_mod::mult_add(a, do_mod::invert(x_), b));
}
friend SPROUT_CONSTEXPR bool operator==(inversive_congruential_engine const& lhs, inversive_congruential_engine const& rhs) {
friend SPROUT_CONSTEXPR bool operator==(inversive_congruential_engine const& lhs, inversive_congruential_engine const& rhs) SPROUT_NOEXCEPT {
return lhs.x_ == rhs.x_;
}
friend SPROUT_CONSTEXPR bool operator!=(inversive_congruential_engine const& lhs, inversive_congruential_engine const& rhs) {
friend SPROUT_CONSTEXPR bool operator!=(inversive_congruential_engine const& lhs, inversive_congruential_engine const& rhs) SPROUT_NOEXCEPT {
return !(lhs == rhs);
}
template<typename Elem, typename Traits>