diff options
Diffstat (limited to 'absl/random/exponential_distribution.h')
| -rw-r--r-- | absl/random/exponential_distribution.h | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/absl/random/exponential_distribution.h b/absl/random/exponential_distribution.h index c8af197..24abf57 100644 --- a/absl/random/exponential_distribution.h +++ b/absl/random/exponential_distribution.h @@ -21,8 +21,9 @@ #include <limits> #include <type_traits> -#include "absl/random/internal/distribution_impl.h" +#include "absl/meta/type_traits.h" #include "absl/random/internal/fast_uniform_bits.h" +#include "absl/random/internal/generate_real.h" #include "absl/random/internal/iostream_state_saver.h" namespace absl { @@ -118,9 +119,14 @@ typename exponential_distribution<RealType>::result_type exponential_distribution<RealType>::operator()( URBG& g, // NOLINT(runtime/references) const param_type& p) { - using random_internal::NegativeValueT; - const result_type u = random_internal::RandU64ToReal< - result_type>::template Value<NegativeValueT, false>(fast_u64_(g)); + using random_internal::GenerateNegativeTag; + using random_internal::GenerateRealFromBits; + using real_type = + absl::conditional_t<std::is_same<RealType, float>::value, float, double>; + + const result_type u = GenerateRealFromBits<real_type, GenerateNegativeTag, + false>(fast_u64_(g)); // U(-1, 0) + // log1p(-x) is mathematically equivalent to log(1 - x) but has more // accuracy for x near zero. return p.neg_inv_lambda_ * std::log1p(u); |