35 lines
959 B
C++
35 lines
959 B
C++
// Copyright 2020 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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#include "base/functional/invoke.h"
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#include <functional>
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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TEST(FunctionalTest, Invoke) {
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struct S {
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int i;
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constexpr int add(int x) const { return i + x; }
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};
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constexpr S s = {1};
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// Note: The tests involving a std::reference_wrapper are not static_asserts,
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// since std::reference_wrapper is not constexpr prior to C++20.
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static_assert(base::invoke(&S::add, s, 2) == 3, "");
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EXPECT_EQ(base::invoke(&S::add, std::ref(s), 2), 3);
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static_assert(base::invoke(&S::add, &s, 3) == 4, "");
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static_assert(base::invoke(&S::i, s) == 1, "");
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EXPECT_EQ(base::invoke(&S::i, std::ref(s)), 1);
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static_assert(base::invoke(&S::i, &s) == 1, "");
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static_assert(base::invoke(std::plus<>(), 1, 2) == 3, "");
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}
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} // namespace base
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