31 lines
972 B
C
31 lines
972 B
C
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// Copyright 2021 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_TEST_TEST_FUTURE_INTERNAL_H_
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#define BASE_TEST_TEST_FUTURE_INTERNAL_H_
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#include <tuple>
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#include <type_traits>
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namespace base::test::internal {
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// Helper to only implement a method if the future holds one or more values
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template <typename Tuple>
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using EnableIfOneOrMoreValues =
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std::enable_if_t<(std::tuple_size<Tuple>::value > 0), bool>;
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// Helper to only implement a method if the future holds a single value
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template <typename Tuple>
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using EnableIfSingleValue =
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std::enable_if_t<(std::tuple_size<Tuple>::value == 1), bool>;
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// Helper to only implement a method if the future holds multiple values
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template <typename Tuple>
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using EnableIfMultiValue =
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std::enable_if_t<(std::tuple_size<Tuple>::value > 1), bool>;
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} // namespace base::test::internal
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#endif // BASE_TEST_TEST_FUTURE_INTERNAL_H_
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