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stuce-bot 2025-06-30 20:47:33 +02:00
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libraries/M5Utility/test/expected/assignment.cpp Normal file
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#include <gtest/gtest.h>
#include <m5_utility/stl/expected.hpp>
TEST(Expected, Assignment)
{
m5::stl::expected<int, int> e1 = 42;
m5::stl::expected<int, int> e2 = 17;
m5::stl::expected<int, int> e3 = 21;
m5::stl::expected<int, int> e4 = m5::stl::make_unexpected(42);
m5::stl::expected<int, int> e5 = m5::stl::make_unexpected(17);
m5::stl::expected<int, int> e6 = m5::stl::make_unexpected(21);
e1 = e2;
EXPECT_TRUE(e1);
EXPECT_TRUE(*e1 == 17);
EXPECT_TRUE(e2);
EXPECT_TRUE(*e2 == 17);
e1 = std::move(e2);
EXPECT_TRUE(e1);
EXPECT_TRUE(*e1 == 17);
EXPECT_TRUE(e2);
EXPECT_TRUE(*e2 == 17);
e1 = 42;
EXPECT_TRUE(e1);
EXPECT_TRUE(*e1 == 42);
auto unex = m5::stl::make_unexpected(12);
e1 = unex;
EXPECT_TRUE(!e1);
EXPECT_TRUE(e1.error() == 12);
e1 = m5::stl::make_unexpected(42);
EXPECT_TRUE(!e1);
EXPECT_TRUE(e1.error() == 42);
e1 = e3;
EXPECT_TRUE(e1);
EXPECT_TRUE(*e1 == 21);
e4 = e5;
EXPECT_TRUE(!e4);
EXPECT_TRUE(e4.error() == 17);
e4 = std::move(e6);
EXPECT_TRUE(!e4);
EXPECT_TRUE(e4.error() == 21);
e4 = e1;
EXPECT_TRUE(e4);
EXPECT_TRUE(*e4 == 21);
}
TEST(Expected, AssignmentDeletion)
{
struct has_all {
has_all() = default;
has_all(const has_all &) = default;
has_all(has_all &&) noexcept = default;
has_all &operator=(const has_all &) = default;
};
m5::stl::expected<has_all, has_all> e1 = {};
m5::stl::expected<has_all, has_all> e2 = {};
e1 = e2;
struct except_move {
except_move() = default;
except_move(const except_move &) = default;
except_move(except_move &&) noexcept(false)
{
}
except_move &operator=(const except_move &) = default;
};
// m5::stl::expected<except_move, except_move> e3 = {};
// m5::stl::expected<except_move, except_move> e4 = {};
// e3 = e4; //should not compile
}