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