| // |
| // Copyright 2018 The Abseil Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| |
| #ifndef ABSL_RANDOM_INTERNAL_DISTRIBUTION_CALLER_H_ |
| #define ABSL_RANDOM_INTERNAL_DISTRIBUTION_CALLER_H_ |
| |
| #include <utility> |
| |
| #include "absl/base/config.h" |
| |
| namespace absl { |
| ABSL_NAMESPACE_BEGIN |
| namespace random_internal { |
| |
| // DistributionCaller provides an opportunity to overload the general |
| // mechanism for calling a distribution, allowing for mock-RNG classes |
| // to intercept such calls. |
| template <typename URBG> |
| struct DistributionCaller { |
| // Call the provided distribution type. The parameters are expected |
| // to be explicitly specified. |
| // DistrT is the distribution type. |
| // FormatT is the formatter type: |
| // |
| // struct FormatT { |
| // using result_type = distribution_t::result_type; |
| // static std::string FormatCall( |
| // const distribution_t& distr, |
| // absl::Span<const result_type>); |
| // |
| // static std::string FormatExpectation( |
| // absl::string_view match_args, |
| // absl::Span<const result_t> results); |
| // } |
| // |
| template <typename DistrT, typename FormatT, typename... Args> |
| static typename DistrT::result_type Call(URBG* urbg, Args&&... args) { |
| DistrT dist(std::forward<Args>(args)...); |
| return dist(*urbg); |
| } |
| }; |
| |
| } // namespace random_internal |
| ABSL_NAMESPACE_END |
| } // namespace absl |
| |
| #endif // ABSL_RANDOM_INTERNAL_DISTRIBUTION_CALLER_H_ |