mirror of
https://github.com/wpilibsuite/allwpilib
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61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
// Copyright (c) FIRST and other WPILib contributors.
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// Open Source Software; you can modify and/or share it under the terms of
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// the WPILib BSD license file in the root directory of this project.
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#include <initializer_list>
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#include <tuple>
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#include <utility>
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#include <vector>
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#include <gtest/gtest.h>
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#include "wpi/util/expected"
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namespace {
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struct TakesInitAndVariadic {
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std::vector<int> v;
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std::tuple<int, int> t;
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template <class... Args>
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TakesInitAndVariadic(std::initializer_list<int> l, // NOLINT
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Args&&... args)
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: v(l), t(std::forward<Args>(args)...) {}
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};
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} // namespace
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TEST(ExpectedTest, Emplace) {
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{
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wpi::util::expected<std::unique_ptr<int>, int> e;
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e.emplace(new int{42});
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EXPECT_TRUE(e);
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EXPECT_EQ(**e, 42);
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}
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{
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wpi::util::expected<std::vector<int>, int> e;
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e.emplace({0, 1});
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EXPECT_TRUE(e);
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EXPECT_EQ((*e)[0], 0);
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EXPECT_EQ((*e)[1], 1);
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}
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{
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wpi::util::expected<std::tuple<int, int>, int> e;
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e.emplace(2, 3);
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EXPECT_TRUE(e);
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EXPECT_EQ(std::get<0>(*e), 2);
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EXPECT_EQ(std::get<1>(*e), 3);
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}
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{
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wpi::util::expected<TakesInitAndVariadic, int> e =
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wpi::util::make_unexpected(0);
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e.emplace({0, 1}, 2, 3);
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EXPECT_TRUE(e);
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EXPECT_EQ(e->v[0], 0);
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EXPECT_EQ(e->v[1], 1);
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EXPECT_EQ(std::get<0>(e->t), 2);
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EXPECT_EQ(std::get<1>(e->t), 3);
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}
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}
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