mirror/Sprout
1
0
Fork 0
mirror of https://github.com/bolero-MURAKAMI/Sprout.git synced 2025-07-16 15:14:13 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

random 修正

Browse source
This commit is contained in:
bolero-MURAKAMI 2011-10-16 23:38:40 +09:00
parent 7ae0072f2e
commit 9255ad6808
4 changed files with 63 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

15
sprout/random/linear_congruential.hpp
View file

@ -29,14 +29,17 @@ namespace sprout {
static_assert(m == 0 || a < m, "m == 0 || a < m");
static_assert(m == 0 || c < m, "m == 0 || c < m");
private:
static SPROUT_CONSTEXPR IntType init_seed_3(IntType const& x0) {
return x0 >= static_min() && x0 <= static_max()
static SPROUT_CONSTEXPR bool arg_check_nothrow(IntType const& x0) {
return x0 >= static_min() && x0 <= static_max();
}
static SPROUT_CONSTEXPR IntType arg_check(IntType const& x0) {
return arg_check_nothrow(x0)
? x0
: throw "assert(x0 >= static_min() && x0 <= static_max())"
;
}
static SPROUT_CONSTEXPR IntType init_seed_2(IntType const& x0) {
return init_seed_3(increment == 0 && x0 == 0 ? 1 : x0);
return arg_check(increment == 0 && x0 == 0 ? 1 : x0);
}
static SPROUT_CONSTEXPR IntType init_seed_1(IntType const& x0) {
return init_seed_2(x0 <= 0 && x0 != 0 ? x0 + modulus : x0);
@ -88,12 +91,12 @@ namespace sprout {
template<typename Elem, typename Traits>
friend std::basic_istream<Elem, Traits>& operator>>(
std::basic_istream<Elem, Traits>& lhs,
linear_congruential_engine const& rhs
linear_congruential_engine& rhs
)
{
IntType x;
if(lhs >> x) {
if(x >= min() && x <= max()) {
if(arg_check_nothrow(x)) {
rhs.x_ = x;
} else {
lhs.setstate(std::ios_base::failbit);
@ -192,7 +195,7 @@ namespace sprout {
template<typename Elem, typename Traits>
friend std::basic_istream<Elem, Traits>& operator>>(
std::basic_istream<Elem, Traits>& lhs,
rand48 const& rhs
rand48& rhs
)
{
return lhs >> rhs.lcf_;