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1 // -*- C++ -*-
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2 //===----------------------------------------------------------------------===//
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3 //
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4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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5 // See https://llvm.org/LICENSE.txt for license information.
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6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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7 //
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8 //===----------------------------------------------------------------------===//
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9
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10 #ifndef BENCHMARK_UTILITIES_H
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11 #define BENCHMARK_UTILITIES_H
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12
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13 #include <cassert>
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14 #include <type_traits>
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15
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16 #include "benchmark/benchmark.h"
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17
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18 namespace UtilitiesInternal {
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19 template <class Container>
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20 auto HaveDataImpl(int) -> decltype((std::declval<Container&>().data(), std::true_type{}));
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21 template <class Container>
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22 auto HaveDataImpl(long) -> std::false_type;
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23 template <class T>
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24 using HasData = decltype(HaveDataImpl<T>(0));
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25 } // namespace UtilitiesInternal
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26
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27 template <class Container, std::enable_if_t<UtilitiesInternal::HasData<Container>::value>* = nullptr>
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28 void DoNotOptimizeData(Container &c) { benchmark::DoNotOptimize(c.data()); }
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29 template <class Container, std::enable_if_t<!UtilitiesInternal::HasData<Container>::value>* = nullptr>
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30 void DoNotOptimizeData(Container &c) { benchmark::DoNotOptimize(&c); }
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31
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32
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33 #endif // BENCHMARK_UTILITIES_H
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