diff options
author | Vincent Ambo <tazjin@google.com> | 2020-05-20T01·32+0100 |
---|---|---|
committer | Vincent Ambo <tazjin@google.com> | 2020-05-20T01·32+0100 |
commit | fc8dc48020ac5b52731d0828a96ea4d2526c77ba (patch) | |
tree | 353204eea3268095a9ad3f5345720f32c2615c69 /third_party/abseil_cpp/absl/container/internal/hash_generator_testing.h | |
parent | ffb2ae54beb5796cd408fbe15d2d2da09ff37adf (diff) | |
parent | 768eb2ca2857342673fcd462792ce04b8bac3fa3 (diff) |
Add 'third_party/abseil_cpp/' from commit '768eb2ca2857342673fcd462792ce04b8bac3fa3' r/781
git-subtree-dir: third_party/abseil_cpp git-subtree-mainline: ffb2ae54beb5796cd408fbe15d2d2da09ff37adf git-subtree-split: 768eb2ca2857342673fcd462792ce04b8bac3fa3
Diffstat (limited to 'third_party/abseil_cpp/absl/container/internal/hash_generator_testing.h')
-rw-r--r-- | third_party/abseil_cpp/absl/container/internal/hash_generator_testing.h | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/third_party/abseil_cpp/absl/container/internal/hash_generator_testing.h b/third_party/abseil_cpp/absl/container/internal/hash_generator_testing.h new file mode 100644 index 000000000000..6869fe45e8c8 --- /dev/null +++ b/third_party/abseil_cpp/absl/container/internal/hash_generator_testing.h @@ -0,0 +1,161 @@ +// 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. +// +// Generates random values for testing. Specialized only for the few types we +// care about. + +#ifndef ABSL_CONTAINER_INTERNAL_HASH_GENERATOR_TESTING_H_ +#define ABSL_CONTAINER_INTERNAL_HASH_GENERATOR_TESTING_H_ + +#include <stdint.h> + +#include <algorithm> +#include <iosfwd> +#include <random> +#include <tuple> +#include <type_traits> +#include <utility> + +#include "absl/container/internal/hash_policy_testing.h" +#include "absl/memory/memory.h" +#include "absl/meta/type_traits.h" +#include "absl/strings/string_view.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace container_internal { +namespace hash_internal { +namespace generator_internal { + +template <class Container, class = void> +struct IsMap : std::false_type {}; + +template <class Map> +struct IsMap<Map, absl::void_t<typename Map::mapped_type>> : std::true_type {}; + +} // namespace generator_internal + +std::mt19937_64* GetSharedRng(); + +enum Enum { + kEnumEmpty, + kEnumDeleted, +}; + +enum class EnumClass : uint64_t { + kEmpty, + kDeleted, +}; + +inline std::ostream& operator<<(std::ostream& o, const EnumClass& ec) { + return o << static_cast<uint64_t>(ec); +} + +template <class T, class E = void> +struct Generator; + +template <class T> +struct Generator<T, typename std::enable_if<std::is_integral<T>::value>::type> { + T operator()() const { + std::uniform_int_distribution<T> dist; + return dist(*GetSharedRng()); + } +}; + +template <> +struct Generator<Enum> { + Enum operator()() const { + std::uniform_int_distribution<typename std::underlying_type<Enum>::type> + dist; + while (true) { + auto variate = dist(*GetSharedRng()); + if (variate != kEnumEmpty && variate != kEnumDeleted) + return static_cast<Enum>(variate); + } + } +}; + +template <> +struct Generator<EnumClass> { + EnumClass operator()() const { + std::uniform_int_distribution< + typename std::underlying_type<EnumClass>::type> + dist; + while (true) { + EnumClass variate = static_cast<EnumClass>(dist(*GetSharedRng())); + if (variate != EnumClass::kEmpty && variate != EnumClass::kDeleted) + return static_cast<EnumClass>(variate); + } + } +}; + +template <> +struct Generator<std::string> { + std::string operator()() const; +}; + +template <> +struct Generator<absl::string_view> { + absl::string_view operator()() const; +}; + +template <> +struct Generator<NonStandardLayout> { + NonStandardLayout operator()() const { + return NonStandardLayout(Generator<std::string>()()); + } +}; + +template <class K, class V> +struct Generator<std::pair<K, V>> { + std::pair<K, V> operator()() const { + return std::pair<K, V>(Generator<typename std::decay<K>::type>()(), + Generator<typename std::decay<V>::type>()()); + } +}; + +template <class... Ts> +struct Generator<std::tuple<Ts...>> { + std::tuple<Ts...> operator()() const { + return std::tuple<Ts...>(Generator<typename std::decay<Ts>::type>()()...); + } +}; + +template <class T> +struct Generator<std::unique_ptr<T>> { + std::unique_ptr<T> operator()() const { + return absl::make_unique<T>(Generator<T>()()); + } +}; + +template <class U> +struct Generator<U, absl::void_t<decltype(std::declval<U&>().key()), + decltype(std::declval<U&>().value())>> + : Generator<std::pair< + typename std::decay<decltype(std::declval<U&>().key())>::type, + typename std::decay<decltype(std::declval<U&>().value())>::type>> {}; + +template <class Container> +using GeneratedType = decltype( + std::declval<const Generator< + typename std::conditional<generator_internal::IsMap<Container>::value, + typename Container::value_type, + typename Container::key_type>::type>&>()()); + +} // namespace hash_internal +} // namespace container_internal +ABSL_NAMESPACE_END +} // namespace absl + +#endif // ABSL_CONTAINER_INTERNAL_HASH_GENERATOR_TESTING_H_ |