1 /*
2 * Copyright 2019, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #pragma once
18
19 #include <functional>
20
21 template<class T>
hash_combine(size_t & seed,const T & value)22 inline void hash_combine(size_t& seed, const T& value) {
23 std::hash<T> hasher;
24 seed ^= hasher(value) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
25 }
26
27