a048203a88
-- d3a10a071226497cd34be0f41cb55449193b7172 by Andy Soffer <asoffer@google.com>: Removing formatting traits that were only used internally. ON_CALL/EXPECT_CALL do a sufficient job here. PiperOrigin-RevId: 288342973 -- df8180038ea36a0876a84fdc163d1319a611f9db by Greg Falcon <gfalcon@google.com>: Add CI testing for alternate options.h settings. PiperOrigin-RevId: 288323951 GitOrigin-RevId: d3a10a071226497cd34be0f41cb55449193b7172 Change-Id: I26c75a1ededd52dd2c5a4c50e220d0b8a52d5c7c
82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
//
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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_MOCKING_BIT_GEN_BASE_H_
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#define ABSL_RANDOM_INTERNAL_MOCKING_BIT_GEN_BASE_H_
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#include <typeinfo>
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#include "absl/random/random.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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class MockingBitGenBase {
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template <typename>
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friend struct DistributionCaller;
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using generator_type = absl::BitGen;
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public:
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// URBG interface
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using result_type = generator_type::result_type;
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static constexpr result_type(min)() { return (generator_type::min)(); }
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static constexpr result_type(max)() { return (generator_type::max)(); }
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result_type operator()() { return gen_(); }
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virtual ~MockingBitGenBase() = default;
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protected:
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// CallImpl is the type-erased virtual dispatch.
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// The type of dist is always distribution<T>,
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// The type of result is always distribution<T>::result_type.
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virtual bool CallImpl(const std::type_info& distr_type, void* dist_args,
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void* result) = 0;
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template <typename DistrT, typename ArgTupleT>
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static const std::type_info& GetTypeId() {
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return typeid(std::pair<absl::decay_t<DistrT>, absl::decay_t<ArgTupleT>>);
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}
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// Call the generating distribution function.
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// Invoked by DistributionCaller<>::Call<DistT>.
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// DistT is the distribution type.
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template <typename DistrT, typename... Args>
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typename DistrT::result_type Call(Args&&... args) {
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using distr_result_type = typename DistrT::result_type;
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using ArgTupleT = std::tuple<absl::decay_t<Args>...>;
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ArgTupleT arg_tuple(std::forward<Args>(args)...);
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auto dist = absl::make_from_tuple<DistrT>(arg_tuple);
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distr_result_type result{};
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bool found_match =
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CallImpl(GetTypeId<DistrT, ArgTupleT>(), &arg_tuple, &result);
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if (!found_match) {
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result = dist(gen_);
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}
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return result;
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}
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private:
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generator_type gen_;
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}; // namespace random_internal
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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_MOCKING_BIT_GEN_BASE_H_
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