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Diffstat (limited to 'absl/container/internal/node_hash_policy.h')
-rw-r--r-- | absl/container/internal/node_hash_policy.h | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/absl/container/internal/node_hash_policy.h b/absl/container/internal/node_hash_policy.h deleted file mode 100644 index 4617162f..00000000 --- a/absl/container/internal/node_hash_policy.h +++ /dev/null @@ -1,92 +0,0 @@ -// 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. -// -// Adapts a policy for nodes. -// -// The node policy should model: -// -// struct Policy { -// // Returns a new node allocated and constructed using the allocator, using -// // the specified arguments. -// template <class Alloc, class... Args> -// value_type* new_element(Alloc* alloc, Args&&... args) const; -// -// // Destroys and deallocates node using the allocator. -// template <class Alloc> -// void delete_element(Alloc* alloc, value_type* node) const; -// }; -// -// It may also optionally define `value()` and `apply()`. For documentation on -// these, see hash_policy_traits.h. - -#ifndef ABSL_CONTAINER_INTERNAL_NODE_HASH_POLICY_H_ -#define ABSL_CONTAINER_INTERNAL_NODE_HASH_POLICY_H_ - -#include <cassert> -#include <cstddef> -#include <memory> -#include <type_traits> -#include <utility> - -#include "absl/base/config.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace container_internal { - -template <class Reference, class Policy> -struct node_hash_policy { - static_assert(std::is_lvalue_reference<Reference>::value, ""); - - using slot_type = typename std::remove_cv< - typename std::remove_reference<Reference>::type>::type*; - - template <class Alloc, class... Args> - static void construct(Alloc* alloc, slot_type* slot, Args&&... args) { - *slot = Policy::new_element(alloc, std::forward<Args>(args)...); - } - - template <class Alloc> - static void destroy(Alloc* alloc, slot_type* slot) { - Policy::delete_element(alloc, *slot); - } - - template <class Alloc> - static void transfer(Alloc*, slot_type* new_slot, slot_type* old_slot) { - *new_slot = *old_slot; - } - - static size_t space_used(const slot_type* slot) { - if (slot == nullptr) return Policy::element_space_used(nullptr); - return Policy::element_space_used(*slot); - } - - static Reference element(slot_type* slot) { return **slot; } - - template <class T, class P = Policy> - static auto value(T* elem) -> decltype(P::value(elem)) { - return P::value(elem); - } - - template <class... Ts, class P = Policy> - static auto apply(Ts&&... ts) -> decltype(P::apply(std::forward<Ts>(ts)...)) { - return P::apply(std::forward<Ts>(ts)...); - } -}; - -} // namespace container_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_CONTAINER_INTERNAL_NODE_HASH_POLICY_H_ |