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